ANTIPERSPIRANT COMPOSITIONS IN AEROSOL AND PRODUCTS

专利摘要:
aerosol antiperspirant compositions, products and methods. an aerosol antiperspirant composition is provided. the aerosol antiperspirant composition includes a propellant having a concentration of 30% to 65% by weight and an antiperspirant composition. the antiperspirant composition includes one or more liquid materials, the one or more liquid materials comprising one or more non-volatile silicone fluids having a concentration of 40% to about 70% by weight; antiperspirant active particulates; one or more active non-antiperspirant particulates that are substantially inert; and wherein the antiperspirant composition has a total particulate concentration of 30% to about 60% by weight, and the antiperspirant composition has a viscosity greater than 1,000 centipoise.
公开号:BR112015004185B1
申请号:R112015004185-0
申请日:2013-09-13
公开日:2020-09-15
发明作者:David Frederick Swaile；Rajeev Kumar Passi；Ann Christine Zoller
申请人:The Procter & Gamble Company；
IPC主号:

专利说明:

TECHNICAL FIELD
[0001] One aspect of the invention relates in general to antiperspirant compositions. Another aspect of the invention relates, in general, to spray devices containing an antiperspirant composition and a propellant. Yet another aspect of the invention relates, in general, to methods of using antiperspirant spray devices BACKGROUND OF THE INVENTION
[0002] Body odor can be generated in the underarm area due to the high concentration of sweat glands. Despite being odorless, sweating contains natural oils that can be a source of nutrients for bacteria that live on the skin. These bacteria interact with natural oils, converting them into odor-producing compounds. Antiperspirant compositions contain an active ingredient, such as aluminum salt, which reacts with the perspiration electrolytes to form a plug in the sweat gland ducts. Tampons prevent perspiration from leaving the duct, thereby depriving bacteria of water and a food source. Antiperspirant compositions can be applied to the skin in a contact type product form, for example, a stick or ball applicator, or a non-contact type product form, such as an aerosol spray. Aerosol spray devices that do not require an antiperspirant composition are known in the art. Several examples are described in U.S. Patent No. 4,152,416; ; U.S. Patent No. 4,806,338; U.S. Patent No. 4,840,786; U.S. Patent No. 4,904,463; U.S. Patent No. 4,935,224; U.S. Patent No. 5,298,236; U.S. Patent No. 5,605,682; U.S. Patent No. 5,814,309; U.S. Patent No. 7. 815,899; EP 674,899; WO 96/04884; WO 2004/014330; and WO 2007/001842.
[0003] Many users of aerosol antiperspirants want a product that minimizes the appearance of residues on the skin, has a dry feeling instead of wet, has a quick drying, is not sticky, provides a feeling of cold / freshness at the time of application , provide moisture and / or odor protection for long-term, be provided under a form factor that is easily carried in small bags (since some users can apply the antiperspirant composition more than once a day) and minimize the gaseous cloud that forms during dispensing. Although the relative importance / desirability of these characteristics may vary with geographic region and sex and not all users desire all or the same set of characteristics, there appears to be a general universal desire among users of aerosol antiperspirants for one or more of a dry feeling instead of wet, minimizing the appearance of residues and providing protection or effectiveness against long-lasting moisture / odor.
[0004] Although some aerosol spray devices currently available on the market can provide at least some of these characteristics to varying degrees, there is always a disadvantage. For example, some currently available aerosol antiperspirant spray devices have relatively high concentrations of propellant (for example, greater than 75% and often greater than 80%). A high concentration of propellant dilutes the antiperspirant composition, which, in turn, can help reduce the risk of obstruction within the spray device. However, a high concentration of propellant can also produce a large volume of gas when exiting the spray device resulting in a gaseous cloud and / or a turbulent spray. The deposition efficiency (for example, the amount of antiperspirant active ingredient and / or fragrance deposited on the skin compared to the amount dispensed) can, in turn, be reduced due to the large amount of antiperspirant active principle and / or fragrance lost to the environment through the gas cloud instead of being deposited on the skin. In addition, these spray devices are typically large (greater than 150 ml) to accommodate the high concentration of propellant and the large amount of antiperspirant composition, resulting in spray devices that may be more difficult to carry in a small bag and the like . A high concentration of propellant may also cause liquid fragrance materials to solubilize in the propellant during storage, resulting in a greater loss to the environment of the liquid fragrance material with the propellant than deposition on the skin. Many aerosol antiperspirant compositions currently available also incorporate a volatile liquid (eg, cyclopentasiloxane) as a vehicle for the antiperspirant active ingredient. The volatile liquid evaporates after application to the skin, resulting in a dry skin sensation, but sometimes leaves a visible residue (the active antiperspirant) that is subject to flaking and / or transfer to clothing. The peeling (or transferring) of the active antiperspirant may also reduce the effectiveness of the antiperspirant. Therefore, there is an ongoing desire to provide improved aerosol antiperspirant products and compositions. DESCRIPTION SUMMARY
[0005] In one aspect, an aerosol antiperspirant composition is provided. The aerosol antiperspirant composition includes a propellant having a concentration of 30% to 65% by weight and an antiperspirant composition. The antiperspirant composition includes one or more liquid materials, wherein one or more liquid materials comprise one or more non-volatile silicone fluids having a concentration of 40% to about 70% by weight; antiperspirant active particulates; one or more active non-antiperspirant particulates that are substantially inert; and wherein the antiperspirant composition has a total particulate concentration of 30% to about 60% by weight and the antiperspirant composition has a viscosity greater than 1,000 centipoise.
[0006] In another aspect, the aerosol antiperspirant compositions, products and methods are provided according to the following numbered paragraphs, which can be reorganized and / or combined in alternative arrangements. 1. An aerosol antiperspirant composition, comprising: a liquid popelent having a concentration of 30% to 65% by weight of aerosol antiperspirant composition or from 40% to 65% or from 50% to 65%; an antiperspirant composition comprising: one or more liquid materials, wherein the one or more liquid materials comprise one or more non-volatile silicone fluids having a concentration of 40% to 70% by weight of antiperspirant composition, more preferably 40 % to 65%; antiperspirant active particulates; one or more active non-antiperspirant particulates that are substantially inert; and wherein the antiperspirant composition has a total particulate concentration of 30% to 60% by weight of antiperspirant composition, more preferably from 40% to 50% by weight of antiperspirant composition, and the antiperspirant composition has a viscosity greater than 1,000 centipoise , more preferably, greater than 3,000 centipoise. An aerosol antiperspirant composition according to claim 1, wherein the one or more liquid materials of the antiperspirant composition essentially consist of the one or more non-volatile silicone fluids and optionally a liquid fragrance material and optionally a gum. silicone. An aerosol antiperspirant composition according to any one of the preceding claims, which further comprises a particulate fragrance material which has a concentration of 0.25% to 5% by weight of antiperspirant composition. An aerosol antiperspirant composition according to any one of the preceding claims, which further comprises a liquid fragrance material containing a concentration of less than 6% or less than 4% by weight of the antiperspirant composition. An aerosol antiperspirant composition according to any one of the preceding claims, wherein the antiperspirant composition comprises less than 1% or less than 0.75% or less than 0.75% or is substantially or completely free of a gum of silicone. An antiperspirant composition according to any one of the preceding claims, wherein the at least one non-volatile silicone fluid has a viscosity of 1E-5 square meters per second at 0.0001 square meters per second (10 cSt at 100 cSt). An aerosol antiperspirant composition according to any one of the preceding claims, wherein a ratio of total liquid materials to total particulate materials is 0.6 to 1.3. An aerosol antiperspirant composition according to any one of the preceding claims, wherein the one or more non-volatile silicone fluids essentially consist of a polydimethyl siloxane fluid that has a viscosity of 5E-5 square meters per second ( 50 cSt). An antiperspirant composition according to any one of the preceding claims, wherein the one or more liquid materials comprise less than 10% by weight of volatile silicone fluids. An antiperspirant composition according to any one of the preceding claims, wherein the antiperspirant composition is substantially completely free of volatile silicone fluids. An aerosol antiperspirant composition according to any one of the preceding claims, wherein the active antiperspirant particles have a concentration of less than 34% by weight of the antiperspirant composition. An aerosol antiperspirant composition according to any one of the preceding claims, which further comprises one or more of the volume or suspension forming materials selected from the group consisting of a silica material, a clay material and combinations of the themselves. 13. An aerosol antiperspirant composition according to any one of the preceding claims, wherein one or more of the active non-antiperspirant particles are selected from the group consisting of particulate fragrance materials, native starches and combinations thereof. An aerosol antiperspirant composition according to any one of the preceding claims, wherein the liquid propellant has a concentration of 50% to 65% by weight of the aerosol antiperspirant composition. An aerosol composition according to any one of the preceding claims, wherein the propellant comprises a primary propellant that has a boiling point below 5 ° C and a secondary propellant that has a boiling point around 5 ° Ç. An aerosol composition according to any one of the preceding claims, wherein the propellant is selected from the group consisting of A-17, A-31 and A-46. An aerosol composition according to any one of the preceding claims, wherein the antiperspirant composition has a viscosity of 2,000 to 50,000 centipoise. An aerosol composition according to any one of the preceding claims, wherein the antiperspirant composition is substantially or completely free of silicones functionalized with quaternary ammonium. 19. An aerosol antiperspirant composition according to any one of the preceding claims, wherein the antiperspirant composition is substantially or completely free of functionalized siloxanes capable of reacting with the active antiperspirant particles through an acid-base reaction or a reaction of chelation. An aerosol antiperspirant composition according to any one of the preceding claims, wherein the one or more non-volatile silicone fluids consist essentially of non-functionalized silicone fluids. 21. An aerosol antiperspirant composition according to any one of the preceding claims, wherein the active antiperspirant particles have a concentration of less than 34% by weight of antiperspirant composition or from 20% to 30% by weight of antiperspirant composition. 22. An aerosol antiperspirant composition according to any one of the preceding claims, wherein the substantially inert particles comprise 10% to 25% by weight of the antiperspirant composition. 23. An aerosol antiperspirant composition according to any one of the preceding claims, wherein the substantially inert particles comprise tapioca starch particles and optionally a fragrance carrier. 24. An aerosol antiperspirant composition according to any one of the preceding claims, wherein the ratio between the concentration of antiperspirant particulate and the concentration of total particulate is less than or equal to about 0.75. 25. A product, comprising a reservoir (118), an actuator (110) comprising an actuator port (112) and a valve in fluid communication with the actuator port (112) and the reservoir, the reservoir being stored an aerosol antiperspirant composition according to any one of the preceding claims. 26. A product according to claim 25, wherein the product has an antiperspirant mass flow rate from 0.1 g / s to 0.3 g / s. 27. A product according to either claim 25 or claim 26, wherein the reservoir has a volume of 60 ml to 100 ml. 28. A product according to any one of claims 25 to 27, wherein the product has a total spray time of 70 seconds to 150 seconds. 29. A product according to any one of claims 25 to 28, wherein the amount of antiperspirant active ingredient deposited on a target surface of the product with a two-second application at a distance of 15 cm is 40 mg to 80 mg. 30. A product according to any one of claims 25 to 29, wherein the product has an antiperspirant composition deposition efficiency of 60% to 95%, or 70% to 95%, or 80% to 95% . A method of using a product according to any one of claims 25 to 30, wherein the antiperspirant composition is sprayed on the surface of the armpit. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Although the descriptive report is completed with the claims, it is believed that it will be better understood from the description below taken in conjunction with the attached drawings, with similar figures illustrating similar elements in the visualizations and in which:
[0008] Figure 1 is a bar graph illustrating various concentrations of propellant depending on the fragrance deposition percentage;
[0009] Figure 2 is a cross-sectional side view of a non-limiting example of an innovative sprinkler device comprising an actuator, a valve assembly and a reservoir containing a liquid propellant, a gaseous propellant and an antiperspirant composition;
[0010] Figure 3 is a perspective view of the assembly of the valve of Figure 2;
[0011] Figure 4 is a side elevation view of the valve assembly of Figure 3;
[0012] Figure 5 is a cross-sectional view of the valve assembly of Figure 4, taken along line 5-5 of the same;
[0013] Figure 6 is a side elevation view in cross section of the valve stem of Figure 5;
[0014] Figure 7 is a perspective view of the fence of Figure 5;
[0015] Figure 8 is a perspective view of the housing of Figure 5;
[0016] Figure 9 is a side elevation view in cross section of the housing of Figure 8, taken along line 9-9 thereof;
[0017] Figure 10 is a perspective view of the insertion element of Figure 5;
[0018] Figure 11 is a side elevation view in cross section of the insertion element of Figure 10, taken along line 11-11 thereof;
[0019] Figure 12 is a top plan view of the bottom of the insertion element of Figure 10; and
[0020] Figure 13 is a photograph of three antiperspirant compositions, each having a different total particulate concentration, after spraying on a material that simulates the skin. DETAILED DESCRIPTION
[0021] A spraying device, container, composition, propellant, etc. may comprise, consist essentially of, or consist of, various combinations of materials, resources, structures and / or features described herein.
[0022] The reference within the specification for "modality (s)" or similar means that a specific material, resource, structure and / or characteristic described together with the modality are included in at least one modality, optionally several modalities, but it does not mean that all modalities incorporate the material, resource, structure and / or characteristic described. In addition, the materials, resources, structures and / or characteristics can be combined in any suitable way by different modalities, and the materials, resources, structures and / or characteristics can be omitted or replaced from what is described. Accordingly, the modalities and aspects described in this document may comprise or be combinable with elements or components of other modalities and / or aspects although they are not expressly exemplified in combination, except where otherwise specified, or an incompatibility is specified.
[0023] In all modalities, all percentages are expressed by weight of the antiperspirant composition (or formulation), unless otherwise specified. All reasons are weight reasons, unless otherwise specified. All ranges of values are inclusive and combinable. The number of significant figures is not representative of either the limitation of the quantities indicated or the accuracy of the measurements. All numerical quantities are understood to be modified by the word "about", unless specifically stated otherwise. Except where otherwise noted, all measurements are understood to be made at approximately 25 ° C and under ambient conditions, with "ambient conditions" meaning conditions under about a pressure atmosphere and about 50% relative humidity. For use in the present invention, the term "molecular weight", or "PM", refers to the numerical average molecular weight, unless otherwise specified.
[0024] The term "antiperspirant composition" refers to any composition containing an antiperspirant active ingredient and which is intended to be sprayed on the skin, exclusive of a propellant.
[0025] The term "antiperspirant efficacy" refers to the amount of moisture protection provided by applying an antiperspirant composition to an area of the armpit by a spray device. Antiperspirant effectiveness can be quantified by the amount (mg) of sweat collected after exposure to a hot room compared to a baseline amount.
[0026] The term "volume or suspension forming material" refers to a material that aims to reduce the decantation of a liquid particulate and / or reduce the severity of the particulate pie formation after decanting.
[0027] The term "obstruction" refers to: i) a blocked passage, orifice or other opening resulting in little or no mass flow out of a container when the actuator is activated, or ii) a valve attached to at least partially opened by the accumulated composition, resulting in semicontinuous or continuous leakage of the antiperspirant composition and / or a propellant from the spraying device, or iii) accumulation of the antiperspirant composition within a portion of the flow path of the container that considerably affects the performance of the spraying device. sprinkling.
[0028] The term "deposition efficiency" refers to the percentage of a material (eg, antiperspirant active ingredient, fragrance material, antiperspirant composition, etc.) that is deposited on a target surface compared to the amount of material that comes out of a sprinkler device.
[0029] The term "particulate", as used here, refers to a material that is solid or hollow or porous (or a combination thereof) and that is substantially or completely insoluble in the liquid materials of an antiperspirant composition.
[0030] The term "propellant" refers to one or more gases that are used to pressurize the antiperspirant composition to facilitate the exit of the antiperspirant composition from the container. Some propellants may be a mixture of gases (for example, A-46 which may be a mixture of isobutane, butane and propane). A propellant can be in the form of a liquid (i.e., a liquefied gas) when under pressure within the reservoir of a spray device. In addition, a propellant may be in a gaseous state within the free space of the reservoir. A propellant can be present both in liquefied form and in the gaseous state within the reservoir. Unless otherwise specified (for example, liquid propellant or gaseous propellant), the term propellant is intended to cover the liquefied form and the gaseous state individually and collectively.
[0031] The term "substantially free from" refers to an amount of a material that is less than 1%, 0.5%, 0.25%, 0.1%, 0.05%, 0.01% or 0.001% by weight of an antiperspirant composition. "Exempt from" refers to the undetectable amount of said ingredient or said thing.
[0032] The term "full fill" refers to the total amount of materials added or stored within a reservoir or reservoirs in a container. For example, full fill includes the propellant and antiperspirant composition stored within a spray device after it is completed or filled and before first use.
[0033] The term "viscosity" means dynamic viscosity (measured in centipoise, cPs, or pascal-seconds, Pa-s) or kinematic viscosity (measured in centistokes, cSt or m2 / s) of a liquid at approximately 25 ° C and ambient conditions. Dynamic viscosity can be measured with the use of a rotational viscometer, such as a Brookfield Dial Reading Model 1-2 RVT viscometer available from Brookfield Engineering Laboratories (USA) or another replaceable model as known in the art. Typical Brookfield axles that can be used include, but are not limited to, RV-7 at an axle speed of 20 rpm, recognizing that the exact axle can be selected as needed by the person skilled in the art. The kinematic viscosity can be determined by dividing the dynamic viscosity by the density of the liquid (at 25 ° C and ambient conditions), as known in the art. I. Propellants
[0034] A spray device comprises a propellant stored in one or more reservoirs of the container. The propellant may be stored in the same reservoir as an antiperspirant composition or in a separate reservoir, although it is preferred that the propellant be stored within the same reservoir as the antiperspirant composition. The propellant can be present in a liquefied form that is miscible with the liquid vehicles of the antiperspirant composition, as well as in the gaseous state within a free space of the reservoir. The liquid propellant and the antiperspirant composition form a mixture that migrates through the container, finally leaving the container where the liquid propellant vaporizes to form a spray.
[0035] Propellant concentration is one of many design variables that can affect the performance of an antiperspirant spray device. For example, the concentration of propellant can affect the mass flow of the antiperspirant composition. The mass flow of the antiperspirant composition refers to that portion of the total mass flow of the liquid propellant / antiperspirant composition that is attributable to the antiperspirant composition. As the concentration of propellant decreases, the density of the liquid propellant / antiperspirant composition mix increases. In other words, the antiperspirant composition is less diluted by the liquid propellant. As a consequence, the ratio between the antiperspirant composition and the liquid propellant in the total mass flow of the mixture increases with the reduction of the propellant concentration. The effect is more pronounced for hydrocarbon propellants (eg, butane, isobutane, propane, etc.), which may have a density below that of the antiperspirant composition resulting in a larger volume fraction of the total mass flow. The reduction in the concentration of propellant can optimize the effectiveness of the antiperspirant: 1) by increasing the mass flow of the antiperspirant composition (and thus the amount of antiperspirant active substance deposited on the skin by use), and ii) reducing the amount of composition antiperspirant lost to the environment in the form of a gas cloud (due to less vaporization of the liquid propellant and / or a less turbulent spray).
[0036] The concentration of propellant can also affect the amount of fragrance deposited on the skin. Many liquid fragrance materials are soluble in common propellants. As the concentration of propellant decreases, less of the liquid fragrance material can be solubilized in the propellant during storage. Less solubilization can mean that less of the fragrance material is lost to the environment as the liquid propellant turns to gas and therefore more liquid fragrance material can be deposited on the skin as part of the antiperspirant composition. This effect can be seen in Figure 1, which is a graph of the amount of fragrance deposited on a blotting card for various concentrations of propellant (for example, 84%, 65% and 50%) and different propellants (for example, A -46, A-31 and A-17, each propellant having a different equilibrium vapor pressure). The antiperspirant composition comprised dimethicone and a liquid fragrance material comprising known fragrance chords (at a total concentration of approximately 5.5% by weight of the antiperspirant composition). The antiperspirant composition was sprayed on blotting cards with aerosol scent available for commercialization over a period of three seconds from a distance of approximately 152 mm (6 inches). The total weight dispensed was determined by weighing the sprinkler and blotting cards before and after dispensing. The blotting cards were then individually placed in 125 ml I-chem jars, and the perfume chords were extracted using hexane followed by analysis by gas chromatography by injection of liquid, with detection by mass spectrometry to determine the total amount of fragrance deposited, represented in Figure 1 along the y-axis as the percentage deposited.
[0037] It appears that there is a non-linear relationship in Figure 1 between the amount of fragrance deposited at 84% of propellant concentration and 65% of propellant concentration compared to the amount of fragrance deposited at 65% of the propellant concentration and 50% of propellant concentration. This relationship in general seems consistent across the three types of propellants. It is believed that, in some cases, an improvement in fragrance deposition can be obtained at concentrations of propellant less than about 70%, 68%, 65%, 60%, 55% or 50% by weight of the total filling of materials . These data may also suggest that it is possible to reduce the concentration of the liquid fragrance material by about 40% to 50% as the concentration of propellant drops from 84% to a range of 70% to 65% while still maintaining approximately the same amount of liquid fragrance deposition on the skin.
[0038] On the other hand, reducing the concentration of propellant can involve numerous disadvantages. First, the smaller dilution of the antiperspirant composition that accompanies the reduced propellant concentration can result in a mixture of antiperspirant / liquid propellant composition that has a higher concentration of particulates than a more diluted mixture. This can increase the risk of obstructing the small passages and holes in a sprinkler. Second, increasing the mass flow rate of the antiperspirant composition too much can lead to overdosing, which in turn can negatively affect the sensation on the skin (for example, leading to a wet or sticky sensation due to the presence of excess principle. antiperspirant active on the skin) and / or increase the likelihood of a visible residue. Third, it may be desirable to reduce the size of one or more orifices and / or other flow areas within the container to avoid too large a mass flow of antiperspirant. However, reducing the size of these flow areas can increase the risk of obstruction. Fourth, the reduction in the concentration of propellant can reduce the feeling of cold / freshness at the time of application due to less deposition of liquid propellant on the skin and subsequently its vaporization.
[0039] Propellant pressure is another design variable that can also affect the mass flow of the antiperspirant / liquid propellant composition mixture. Different propellants have different equilibrium pressures within the free space of a reservoir. For example, A-46 (which is typically a mixture of isobutane, butane and propane) has an equilibrium pressure of 46 psig (317 kPa), although A-31 (which is isobutane) has an equilibrium pressure of 31 psig ( 213 kPa). As the propellant pressure within the free space decreases, the mass flow of the antiperspirant / liquid propellant composition mixture correspondingly decreases (all other variables, such as the design of the flow path, remain constant).
[0040] It is believed that concentrations of propellant less than 30% by weight of the total filling of the container may result in too high a mass flow of the antiperspirant composition. While reducing control of the size / area of the orifice inside the container may help to compensate for part of the increased mass flow of the antiperspirant composition by reducing the propellant concentration, propellant concentrations less than 30% may require orifice sizes so small that they may become susceptible to clogging and / or may be more difficult to manufacture at a low cost for commercial products. It is also believed that higher concentrations of propellant (for example, greater than about 65-70% by weight of full container fill) may result in unwanted solubilization of liquid fragrance materials in the propellant and / or otherwise lead to a continued reduction in the efficiency of the deposition of the antiperspirant composition due to the lower mass flow of the antiperspirant composition and / or the propensity to disperse more antiperspirant composition in the form of a gas cloud.
[0041] The propellant can have a concentration of about 30%, 32%, 34% 36%, 38%, 40% or 42% to about 70%, 65%, 60%, 58%, 56%, 54 %, 52%, 50%, 48%, 46%, 44% or 42% by weight of the total filling of the materials (i.e. propellant and antiperspirant composition) stored inside the spray device. The amount of liquid propellant (in grams) stored inside a container can be from about 4 g, 6 g, 8 g, 10 g to about 50 g, 25 g, 20 g or 15 g. The volume of liquid propellant stored inside the container can be from about 10 ml, 20 ml, 30 ml or 40 ml to about 100 ml, 80 ml, 70 ml, 60 ml or 50 ml.
[0042] A wide variety of propellants can be used with the spray devices and antiperspirant compositions described here, although in some embodiments the spray device is substantially free of propellants based on compressed gas, such as nitrogen, air and carbon dioxide. Some suitable propellants may have a boiling point (at atmospheric pressure) within the range of about -45 ° C to about 5 ° C. Some suitable propellants may include chemically inert hydrocarbons, such as propane, n-butane, isobutane and cyclopropane, and mixtures thereof, as well as halogenated hydrocarbons, such as dichloro difluoro methane (propellant 12) 1,1-dichloro-1,1,2, 2-tetrafluoro ethane (propellant 114), 1-chloro-1,1-difluoro-2,2-trifluoro ethane (propellant 115), 1-chloro-1, 1-difluoro ethylene (propellant 142B), 1,1-difluoro ethane (propellant 152A), dimethyl ether and difluoro methane monochlorine, and mixtures thereof. Some propellants suitable for use include, but are not limited to, A-46 (a mixture of isobutane, butane and propane), A-31 (isobutane), A-17 (n-butane), A-108 (propane) , AP70 (a mixture of propane, isobutane and n-butane), AP40 (a mixture of propane, isobutene and n-butane), AP30 (a mixture of propane, isobutane and n-butane), HFO1234 (trans - 1.3 , 3,3-tetrafluoro propene) and 152A (1,1 difluoro ethane).
[0043] In some embodiments, it may be desirable to provide a mixture of propellants that have different boiling points. The combination of a primary propellant that has a boiling point below 5 ° C with a secondary propellant that has a boiling point above 5 ° C can increase the likelihood that more liquid propellant will reach the surface of the skin. This, in turn, can accentuate the feeling of cold / freshness at the time of application due to the vaporization of the additional liquid propellant (for example, the secondary propellant) from the skin. The secondary propellant can have a concentration of about 1% to about 20%, or about 1% to about 15%, or from about 2% to about 10% by weight of the total filling of materials in the product . The secondary propellant can have a boiling point of about 5 ° C, 10 ° C, 15 ° C, 20 ° C or 25 ° C at about 40 ° C, 35 ° C or 30 ° C. In some embodiments, the secondary propellant may have a boiling point greater than room temperature, or from 25 ° C to 40 ° C, which may further increase the likelihood that the secondary propellant will reach the skin and vaporize from it. Two non-limiting propellants suitable for use as secondary propellants include pentane and isopentane, although other propellants that have boiling points within the ranges described herein can also be used. II. Antiperspirant compositions A. Viscosity of the antiperspirant composition
[0044] In some embodiments, it may be desirable for the viscosity of the antiperspirant composition to be about 1,000 centipoise, 2,000 centipoise or 3,000 centipoise to about 50,000 centipoise, 40,000 centipoise or 30,000 centipoise or 20,000 centipoise or 10,000 centipoise or 7,000 centipoise, 5,000 centipoise or 4,000 centipoise at 25 ° C (1 centipoise being equal to 1 x 10 3 Pa.s). It is believed that a viscosity of less than 1,000 centipoise can lead to an antiperspirant composition, which when sprayed, results in a dripping or dripping effect on the skin. This can be perceived by a user as a wet sensation instead of a dry one. For comparison, ball applicator-type antiperspirant compositions often have viscosities below 1,000 centipoise, as the ball applicator uses a ball to apply a thin film of the antiperspirant composition thus minimizing the dripping or dripping effect.
[0045] By way of illustration, three antiperspirant compositions (Examples 1, 2 and 3) were prepared, each having a different concentration of total particulate, and thus viscosity as well. Example 1 comprised 30% of the total particulate matter, Example 2 comprised 37% of the total particulate matter, while Example 3 comprised 44% of the total particulate matter. The composition of Example 1 had a viscosity of about 0.0001 square meters per second (950 cSt), the composition of Example 2 had a viscosity of about 0.0021 square meters per second (2,050 cSt), while the composition Example 3 had a viscosity of about 0.0055 square meters per second (5,500 cSt). Approximately 0.1 ml of each antiperspirant composition was applied to a skin simulation using a syringe. The simulated skin samples were then positioned vertically for approximately 10 seconds. Figure 13 is a photograph taken of the skin simulation samples after approximately 10 seconds in an upright position. It can be noted that the composition of Example 1 "dripped" a lot and had an average drip length more than three times that of the composition of Example 3. The antiperspirant composition of Example 1 approached that of an antiperspirant product of the applicator type ball and has unsatisfactory aesthetics for use in an aerosol antiperspirant product. The antiperspirant composition of Example 3 showed good aesthetics and appears acceptable for use in an aerosol antiperspirant product.
[0046] As an antiperspirant composition must be flowable so that it can be sprayed effectively from a spray device, the antiperspirant composition can be devoid of ingredients in sufficient concentrations so that an antiperspirant stick or gel-type rheology is provided. Some common agents that can be excluded in significant amounts include hydrogenated castor / castor oil, solid paraffins, silicone waxes and mixtures of the soaps. B. Non-volatile silicone fluids
[0047] Antiperspirant compositions comprise one or more non-volatile silicone fluids. The non-volatile silicone fluid can serve as the primary or primary liquid carrier of the antiperspirant active ingredient. As used herein, the term "non-volatile" refers to a material that has a boiling point above 250 ° C (at atmospheric pressure) and / or a vapor pressure below 0.1 mm Hg at 25 ° C . On the other hand, the term "volatile" refers to a material that has a boiling point less than 250 ° C (at atmospheric pressure) and / or a vapor pressure of about 0.1 mm Hg at 25 ° C . Incorporating a non-volatile silicone fluid into an antiperspirant composition can provide several benefits. First, any antiperspirant composition that remains inside the container downstream of or inside the valve may be subject to drying, particularly when a volatile liquid vehicle is used. This does not pose any major problems at higher propellant concentrations, as more propellant is available to expand and unlock the valve openings and actuator of the antiperspirant composition before drying. However, at lower concentrations of propellant, the accumulation and dryness of the antiperspirant composition may be more frequent, which may, in turn, increase the risk of obstruction. Incorporating a non-volatile silicone fluid into the antiperspirant composition can reduce the risk of dryness inside the container after use. Second, incorporating a non-volatile silicone fluid can increase the adhesion of the antiperspirant composition to the skin, potentially increasing the antiperspirant effectiveness, since the antiperspirant composition can form a film that more readily adheres to the skin instead of peeling or transferring to the skin. clothing. Third, incorporating a non-volatile silicone fluid can also decrease the propensity for a visible residue to appear on the skin (compared to the use of a volatile silicone fluid), since the non-volatile silicone fluid does not evaporate leaving it so the white antiperspirant active ingredient as a visible residue. However, incorporating a non-volatile silicone fluid does not happen without possible disadvantages. A perception of moisture after application (which may be undesirable for some consumers) is a disadvantage that can be associated with high concentrations of a non-volatile silicone fluid in an antiperspirant composition.
[0048] The total concentration of non-volatile silicone fluids can be about 30%, 35%, 40%, 45%, 50% to about 70%, 65%, 60%, 55% or 50% in weight of an antiperspirant composition. In some embodiments, the total concentration of non-volatile silicone fluids can be from about 35% or 45% to about 55% by weight of an antiperspirant composition. The liquid materials of the antiperspirant composition can essentially consist of or comprise mainly one or more non-volatile silicone fluids. Some non-volatile silicone fluids that can be used include, but are not limited to, polyalkyl siloxanes, polyalkyl aryl siloxanes and polyether siloxane copolymers and mixtures thereof. Some preferred non-volatile silicone fluids can be linear polyalkyl siloxanes, specifically polydimethyl siloxanes (e.g., dimethicone). These siloxanes are available, for example, from Momentive Performance Materials, Inc. (Ohio, USA) under the trade name Element 14 PDMS (viscosity oil). Silicone fluids from Dow Corning Corporation (Midland, Michigan, USA) available under the Dow Corning 200 Fluid series trade name (for example, 3E-6 at 0.0004 square meters per second (3 to 350 cSt)). Other non-volatile silicone fluids that can be used include polymethyl phenyl siloxanes. These siloxanes are available, for example, from the General Electric Company, as methylphenyl fluid SF 1075, or from Dow Corning, as fluid 556. A polyether siloxane copolymer that can be used is, for example, a carbon copolymer fluid. polyoxy alkylene dimethyl ether. These copolymers are available, for example, from the General Electric Company as an organosilicone surfactant SF-1066. The non-volatile silicone fluid can have an average viscosity of about 3E-6 square meters per second, 5E-6 square meters per second, 1E-5 square meters per second, 2E-5 square meters per second or 5E-5 square meters per second at about 0.0004 square meters per second, 0.0002 square meters per second, 0.0001 square meters per second, 5E-5 or 3E-5 square meters per second (3 cSt, 5 cSt, 10 cSt, 20 cSt or 50 cSt at about 350 cSt, 200 cSt, 100 cSt, 50 or 30 cSt) at 25 ° C (1E-6 square meters per second (1 cSt) being equal to 1 x 10-6 m2 / s) . In some specific embodiments, the silicone fluid can have a viscosity of about 5E-6 square meters per second at about 0.0001 square meter per second or 5E-6 square meters per second at about 5E-5 square meters per second or about 5E-6 square meters per second at about 3E-5 square meters per second (5 cSt to about 100 cSt or 5 cSt to about 50 cSt or about 5 cSt to about 30 cSt). Higher viscosity non-volatile silicone fluids (for example, greater than 0.0001 square meters per second or 0.0002 square meters per second or 0.004 square meters per second (100 cSt or 200 cSt or 350 cSt)) are mixed preferably with lower viscosity non-volatile silicone fluids to obtain an adequate viscosity of the antiperspirant composition in combination with the concentration of particulates. High viscosity non-volatile silicone fluids (for example, greater than 0.0001, 0.0002 or 0.0004 square meters per second (100, 200 or 350 cSt)) can comprise less than 25% by weight of a composition antiperspirant.
[0049] In some cases, the non-volatile silicone fluid is a polydimethylsiloxane fluid (also called dimethicone). It will be understood that a polydimethylsiloxane fluid can be further characterized by, optionally, its viscosity or its molecular weight or its formula or a combination thereof. In some cases, the polydimethylsiloxane fluid may have the following characteristics:

1 The compositions of Examples 1 to 24 and Figures 1 to 12, since they contain a dimethicone fluid, were formulated using a DC200 series Dow Corning fluid, which is believed to have average molecular weights and average number of monomer subunits that fit together within the approximate values of the table described above.
[0050] The polydimethylsiloxane fluid can have the following formula (II): M - Dx - M where M is (CH3) 3SiO and D is 2CH3 (SiO) and X is equal to the average number of monomeric units (see, for example , Table 1) in the polymer minus 2. In some embodiments, X may be about 6 to about 185, about 9 to about 125, about 9 to about 80, about 9 to about 50, about 13 to about 50, or about 27 to about 50. In other embodiments, X can be about 6 to about 35, about 9 to about 35, or about 13 to about 35. The term "approximate" as used in Table 1 refers to + 10% of a given value.
[0051] Although a wide variety of non-volatile silicone fluids or oils can be used in an antiperspirant composition, in some cases, it may be desirable that non-volatile silicone fluids consist essentially of or consist of or consist mainly of fluids of non-functionalized silicone. In some embodiments, it may be additionally desirable for non-volatile silicone fluids to be substantially or completely free of non-functionalized siloxanes capable of reacting with the antiperspirant active ingredient through an acid-base reaction or a chelation reaction. This is in contrast, for example, to U.S. Patent No. 4,806,338, which proposes the use of functionalized siloxanes. Functionalized siloxanes may, in some cases, be disadvantageous as they react with the antiperspirant active ingredient through an acid-base reaction in the case of amino-functional silicones, which are the Lewis bases (the antiperspirant active ingredients are Lewis acids) or through a chelation reaction (in the case of silicones with carboxy functionality), whose reactions can reduce the effectiveness of the active antiperspirant. In addition, functional silicones of the type shown in U.S. Patent No. 4,806,338 may have reduced solubility in the propellant (and vice versa) which may give rise to inhomogeneity in the product with inhomogeneity resulting from deposition on the skin. C. Materials of liquid fragrance
[0052] An antiperspirant composition may also optionally comprise one or more liquid fragrance materials. Liquid fragrance materials are typically a mixture of perfume or aroma components that are optionally mixed with a suitable solvent, diluent or carrier. Some solvents, diluents or vehicles suitable for the perfume components may include ethanol, isopropanol, diethylene glycol monoethyl ether, dipropylene glycol, diethyl phthalate, triethyl citrate, isopropyl myristate and mixtures thereof. An antiperspirant composition can comprise from about 0.5%, 0.75%, 1%, 2%, 3% or 4% to about 10%, 8%, 6% or 4%, 3% or 2% in weight of a liquid fragrance material.
[0053] The perfume component can be any natural or synthetic perfume component known to the person skilled in the art of creating fragrances including, but not limited to, essential oils, citrus oils, absolutes, resinoids, resins, concretes, etc., and synthetic perfume components, such as hydrocarbons, alcohols, aldehydes, ketones, ethers, acids, esters, acetal, ketal, nitriles, etc., including saturated and unsaturated compounds, aliphatic, carbocyclic and heterocyclic compounds. Some non-limiting examples of perfume components include: geraniol, geranyl acetate, linalool, linalyl acetate, tetrahydro linalool, citronelol, citronellyl acetate, dihydromyrcenol, dihydromyrcenyl acetate, tetraidromircenol, terpinol, terpinyl acetate, nopol, acetate acetate nopila, 2-phenylethanol, phenyl ethyl 2-acetate, benzyl alcohol, benzyl acetate, benzyl salicylate, benzyl benzoate, styryl acetate, amyl salicylate, dimethyl benzyl carbinol, trichloro methyl acetate phenyl carbinyl, p acetate -ter- butyl-cyclohexyl, isononyl acetate, vetiveryl acetate, vetiverol, alpha-n-amylcinamic aldehyde, alpha-hexicinamic aldehyde, 2-methyl-3- (p-ter-butylphenyl) -propanol, 2-methyl -3- (p-isopropyl phenyl) -propanal, 3- (p-ter-butyl phenyl) - propanal, tricyclodecenyl acetate, tricyclodecenyl propionate, 4- (4-hydroxy-4-methyl pentyl) -3-cyclo- hexene carbaldehyde, 4- (4-methyl-3-pentenyl) -3-cyclohexene carbaldehyde, 4-acetoxy-3-pentyl tetrahydr pyran, methyl dihydro jasmonate, 2-n-heptyl cyclopentanone, 3-methyl-2-pentyl cyclopentanone, n-decanal, 9-decenol-1, phenoxy ethyl isobutyrate, phenyl acetaldehyde, dimethyl acetal, phenylacetaldehyde, diethyl acetal, geranitrile, citronellonitrile, cedril acetate, 3-isocanfil cyclohexanol, cedril methyl ether, isolongifolanone, aubepine nitrile, aubepine, heliotropin, coumarin, eugenol, vanillin, diphenyl oxide, citronellal hydroxide, ionones, methionones, isionones, isionones, isionones, isionones, isionones, isionones, isionones, isionones, methionones, isionones, methionones, isionones, methionones, isionones, methionones, isionones, methionones, isomones, 3-hexenol and esters thereof, fragrances of indigo musk, fragrances of tetraline musk, fragrances of isochromanic musk, macrocyclic ketones, fragrances of macrolactone musk, ethylene brassilate, aromatic nitro-musk fragrances. Some perfume components are also described in Arctander, Perfume and Flavor Chemicals (Chemicals), Vol. I and II (1969) and Arctander, Perfume and Flavor Materials of Natural Origin (1960). D. Other liquid materials
[0054] Although it may be desirable that the liquid materials of the antiperspirant composition consist essentially of or are formed primarily from non-volatile silicone fluids, it is contemplated that other liquid materials may optionally be included in an antiperspirant composition. The liquid materials of the antiperspirant composition may comprise less than 30%, 20%, 10% or less than 5% by weight of liquid materials other than non-volatile silicone fluids. In other words, the liquid materials of the antiperspirant composition can comprise more than 70%, 75%, 80%, 85%, 90% or about 100% by weight of non-volatile silicone fluids.
[0055] It is believed that an antiperspirant composition whose liquid materials comprise an excess of volatile silicone fluid can lead to an increased propensity for the appearance of a residue due to the evaporation of the volatile silicone fluid. An antiperspirant composition can comprise less than 10%, 5%, 1% or 0.5% by weight of a volatile silicone fluid. An antiperspirant composition can be substantially or completely free of a volatile silicone fluid.
[0056] An antiperspirant composition may optionally comprise one or more silicone gums. The term "gum" is used to refer to a material that has a viscosity within the range of about 100,000 to about 1 square meter per second (100 million cSt) at 25 ° C and is slowly flowable as opposed to a solid rigid, which is not flowable, or a liquid, which is too flowable. Some examples of silicone gums include, but are not limited to, functional quaternary ammonium silicones, such as DC7-6030 available from Dow Corning and 34720, 34749, 34731, 33134, SF-96, SF-1066, SF18 (350) , SE30 and SE32 available from General Electric. A silicone gum can be added to an antiperspirant composition to further increase the adherence of the antiperspirant composition and / or to increase the droplet size of the aerosol spray particles. However, formulating an antiperspirant composition with a silicone gum in combination with relatively high concentrations of a non-volatile silicone fluid and / or relatively high concentrations of total particulate can have several disadvantages. For example, excess silicone gum can dramatically increase the viscosity of the antiperspirant composition and the risk of clogging the actuator and / or valve of the container, particularly where there is already a relatively high concentration of total particulate. In addition, excess silicone gum can reduce the spray diameter making it difficult for a user to completely cover an armpit (typically an area of 7.5 cm x 12.5 cm) during application, and also creating possible regions of high dosage of antiperspirant composition, thus possibly affecting the sensation of the skin. In addition, some silicone gums, such as the quaternary ammonium-functionalized silicones described in US Patent No. 7,815,899, may have an undesirable odor (for example, as a fish odor) associated with it, which can then be conferred to an antiperspirant composition in some cases.
[0057] Examples 4 to 9 illustrate the effect that the concentration of silicone gum can have on the spray pattern. The antiperspirant compositions of Examples 4 to 9 comprised different concentrations of a mixture of silicone gum (12% dimethicone in dimethicone), in the range of 0.5% (Example 4) to 12% (Example 9) by weight of the antiperspirant composition . The antiperspirant compositions were sprayed on black cardboard, and the diameter and characteristics of the spray pattern were observed. The spray pattern produced by Example 9 is believed to be insufficient to be used in an aerosol antiperspirant product, while the spray patterns of Examples 5, 6 and 7 are acceptable. The spray patterns of Examples 4 and 8 were marginally acceptable. Different propellants (for example, with a lower vapor pressure, such as A-17) can optimize the spray pattern of Example 4 while Example 8 can be optimized with A-46. In general, it is believed that as the concentration of propellant and / or vapor pressure of the propellant increases, a higher concentration of gum may be useful.
[0058] With the one or more possible challenges associated with the incorporation of a gum and more particularly a silicone gum, an antiperspirant composition can be substantially or completely free of gum materials. When the inclusion of one or more gums is desirable, an antiperspirant composition can have a total concentration of about 0.05% or 0.075% to about 1%, 0.75%, 0.5%, 0.4%, 0.3% or 0.2% gums by weight of antiperspirant composition. The gum can have a viscosity of about 0.1 square meter per second to about 10 square meters per second (100,000 cSt to about 10,000,000 cSt) at 25 ° C.
[0059] If a silicone gum is included, any silicone gum that has a viscosity within the ranges described here can be used, as long as it is soluble in the liquid vehicle, propellant or a combination thereof of the antiperspirant composition. Some suitable silicone gums include silicone polymers of the dimethyl polysiloxane type, which may have other bonded groups, such as phenyl, vinyl, cyan or acrylic, but the methyl groups must be in a greater proportion. Silicone polymers that have a viscosity below about 0.1 square meter per second (100,000 cSt) (molecular weight below around 100,000) at 25 ° C are not considered silicone gums here, but are instead, typically, considered a silicone fluid. A non-limiting example of silicone gum suitable for use is a blend of silicone fluid / gum comprising a dimethicone gum that has a molecular weight of about 200,000 to 4,000,000 together with a silicone fluid carrier with a viscosity of about 0.65 to 100 mm2 s-1. An example of this silicone / gum blend is available from Dow Corning, Corp, of Michigan, USA under the trade name Fluid DC-1503 (88% dimethicone / 12% dimethicone fluid). Other silicone gum materials include dimethicone SF1236, dimethicone SF1276 and dimethicone CF1251 available from Momentive Performance Materials, Inc. of NY, USA.
[0060] An antiperspirant composition is preferably substantially or completely free of water added as a separate ingredient (ie anhydrous), since excess water added can result in several harmful effects, such as: 1) increased propensity of active antiperspirant particles to clump (thus increasing the propensity to obstruction), and 2) reduction of the feeling of dryness in the skin. It will be understood that even an anhydrous antiperspirant composition can still contain some water that is bound to an ingredient (e.g., antiperspirant active ingredient, tapioca material, etc.) otherwise added to the antiperspirant composition. E. Particulate materials
[0061] Although a combination of low propellant concentration and high concentration of non-volatile silicone fluids can provide numerous benefits, this combination can also have several disadvantages. For example, increased deposition of the antiperspirant active ingredient (facilitated by a low concentration of propellant) in combination with a high concentration of a non-volatile silicone fluid can result in a wet and / or sticky sensation on the skin. In addition, a non-volatile silicone fluid may tend to prevent the release of the antiperspirant active ingredient more than a volatile liquid vehicle, since a volatile liquid vehicle evaporates leaving behind the antiperspirant active ingredient and other non-volatile components, which are easily moistened by perspiration, thus releasing the active antiperspirant. In contrast, non-volatile silicones do not evaporate as easily and tend to be hydrophobic, thus possibly reducing the release of the antiperspirant active ingredient.
[0062] It is believed that the release of a sufficient concentration of particulates to the skin improves the sensation on the skin of an antiperspirant composition that comprises a high concentration of a non-volatile silicone fluid. It is believed that an antiperspirant composition comprising a ratio of total non-volatile liquid material to total particulate material (L / P ratio) of about 0.6, 0.8, 1, 1.2 or 1.4 at about 1.6, 1.4, 1.2 or 1 it can offer a balance to the disadvantage between sufficient particulates to provide an acceptable skin sensation while minimizing the appearance of the residue. An antiperspirant composition can have a total particulate concentration of about 30%, 35% or 40% to about 50% or 45% by weight of the antiperspirant composition.
[0063] The antiperspirant composition can comprise a variety of particulate materials. However, it is believed that the type (for example, hydrophilic versus hydrophobic) and concentrations of particulate materials included in an antiperspirant composition can, in some cases, affect the sensation on the skin, release the antiperspirant active ingredient and the propensity for obstruction in the device. sprinkler. For example, the excess antiperspirant active ingredient can result in a feeling of wet or sticky skin due to the propensity of the active antiperspirant ingredients to become sticky when hydrated (for example, by perspiration) even within the L / P ratios described above. In addition, an excess hydrophobic particulate material can reduce the release of the antiperspirant active ingredient in the composition. On the other hand, the inclusion of a hydrophilic particulate material can advantageously assist in the release of the antiperspirant active ingredient, which can be beneficial in a composition that comprises a high concentration of a non-volatile silicone fluid. However, hydrophilic materials can increase the risk of obstruction in the presence of water. Therefore, it may be desirable to balance these and other design considerations by incorporating particulate materials in an antiperspirant composition that comprises a non-volatile silicone fluid which, in turn, is used in a spraying device with a low concentration of propellant.
[0064] In relation to Examples 10 to 15, several antiperspirant compositions, which comprise a non-volatile silicone fluid and which have different ratios of total particulate and total liquid and liquid to particulate, were analyzed for the amount of visible residue provided by the antiperspirant composition. The L / P ratios of 0.5, 0.8, 1, 1.4, 1.9 and 3.6 were analyzed. L / P ratios less than 1 are believed to provide very good skin sensation characteristics (see, for example, Example 3, where 44% of solids and an L / P ratio of 1.27 provided minimal runoff ). From Examples 10 to 15, it is believed that the high L / P ratios tend to reduce the appearance of visible residue in an antiperspirant composition that comprises a non-volatile silicone fluid and, in addition, that L / P ratios greater than about 1 can be particularly beneficial, as there appears to be a significant reduction in the appearance of the residue at an L / P ratio of about 1 (for example, comparing Examples 12 and 13) and thereafter. Therefore, it is believed that the L / P ratios of about 1 to about 1, 6 can be particularly beneficial in some cases as it provides a balance between the advantage and disadvantage of the sensation in the skin and the residue in an antiperspirant composition that comprises a non-volatile silicone fluid.
[0065] [078] Some examples of particulate materials suitable for use include, but are not limited to, antiperspirant active ingredients, powders (eg, starch materials), encapsulated fragrance materials, and volume or suspension forming agents (eg example, or silica and clay materials). Other types of particulates can also be incooperated ΘΠI urns, antipGi Spii 8.ntG composition
[0066] Antiperspirant active ingredients
[0067] An antiperspirant composition comprises one or more antiperspirant active ingredients. The antiperspirant active ingredients are in a particulate form (rather than solubilized) in the antiperspirant composition. Therefore, it may be desirable for the antiperspirant composition to be provided in a form other than an emulsion that is substantially or completely free of solubilizers for the antiperspirant active ingredient. The antiperspirant composition can be provided in the form of a liquid dispersion (including suspensions and colloids). This is in contrast to, for example, WO 03/002082, which discloses the solubilization of the antiperspirant active ingredient in an emulsion having a dispersed phase and a continuous phase. As the amount of antiperspirant active ingredient can significantly affect the sensation on the skin, an antiperspirant composition can comprise from about 16%, 18%, 20%, 22% or 24% to about 34%, 32%, 30%, 28 % or 26-5 by weight of a particulate antiperspirant active ingredient. In some cases, it may be desirable to use a low concentration of the antiperspirant active ingredient, such as less than 20-O or I8-0 by weight of the antiperspirant composition. The concentrations of antiperspirant active ingredient refer to the amount of anhydrous that is added.
[0068] With reference to Examples 16 to 23, various antiperspirant compositions were prepared with different concentrations of active antiperspirant particles, non-volatile silicone fluid, concentrations of total particulate and concentration of active antiperspirant particulate for the total particulate concentration. It is believed that high concentrations of active antiperspirant particles and / or reasons for the high concentration of the active antiperspirant to total particulate concentration (A / P) may result in antiperspirant compositions that are undesirably sticky and / or that may result in the formation of nodules. or unwanted balls of active antiperspirant particles when moistened by a sweat event. A small amount of water was added to the antiperspirant compositions to simulate a sweat event and the amount of adhesion associated with the antiperspirant composition after the wetting was measured. Comparing Examples 16 and 17 (both with the same concentration of dimethicone but with different total solids), the adhesion associated with the antiperspirant composition of Example 17 is believed to have increased significantly to a too sticky level. The antiperspirant composition of Example 17 showed an A / P ratio of 0.9 and a concentration of active antiperspirant particulate of 40%. Comparing Examples 18, 19 and 20, the antiperspirant compositions of Examples 18 and 19 had acceptable adhesion scores, although the antiperspirant composition of Example 20 is believed to be too sticky. The antiperspirant composition of Example 20 had an A / P ratio of 0.94 and an antiperspirant active particulate concentration of 48%. Comparing Examples 21, 22 and 23, the antiperspirant composition of Example 21 is believed to be acceptable while the antiperspirant composition of Examples 22 and 23 showed accumulation when moistened. The antiperspirant composition of Example 23 showed an A / P ratio of 0.86 and an antiperspirant active particulate concentration of 50%. It is believed that concentrations of active antiperspirant particulates greater than 35-O, 40-O, 45% or 50% may result in stickiness and / or formation of unwanted nodules in use when the A / P ratio is greater than 0.8 , 0.85, 0.9 or 0.95. In other words, it may be desirable for the antiperspirant composition to have an A / P ratio of less than about 0.95, 0.9, 0.85 or 0.8, or about 0.1 or 0.3 to about 0.75, 0.7, 0.6 or 0.5.
[0069] The antiperspirant active ingredient may represent the highest concentration of particulate materials in the antiperspirant composition. For example, the antiperspirant active ingredient (on an anhydrous basis) can comprise from about 50% to about 80%, or from about 50% to about 70%, or from about 50% to about 60% of the total particulate matter in the antiperspirant composition. The balance of the total particulate concentration comprises active non-antiperspirant particles. Some examples of suitable antiperspirant active ingredients include astringent metal salts, particularly, including inorganic and organic aluminum salts. Some exemplary non-limiting examples of aluminum salts that can be used include aluminum chloride and aluminum hydroxy halides with the following general formula A12 (OH) aQbXH20, where Q is chloride, bromide or iodide (preferably chloride), a is from about 2 to about 5, and a + b = about 6, ea and b don't need to be whole numbers, and where X is about I to about 6, and X doesn't have to be an integer. Aluminum chlorohydroxides called "5/6 basic chlorohydroxide" where "a" is 5 and "2/3 basic chlorooxide" where "a" is 4. Aluminum salts of this type can be prepared as described with more details in US Patent No. 3,887,692; 3,904,741; and 4,359,456. Preferably the compounds include the 5/6 basic aluminum salts of empirical formula A12 (OH) 5DI2H20; mixtures of AIC136H20 and A12 (OH) 5Cl2H2O with weight ratios of aluminum chloride to aluminum hydroxychloride of up to about 0.5. Some examples of specific antiperspirant active ingredients include, but are not limited to, aluminum hydrochloride, aluminum dihydrochloride, aluminum sesquichlorohydrate, aluminum hydroxychloride and propylene glycol complex, aluminum propylene glycol dichloroidrex complex, aluminum glycol complex, propylene glycol hydrochloride, propylene glycol complex aluminum polyethylene glycol chloroidrex complex, aluminum polyethylene glycol dichloroidrex complex, aluminum polyethylene glycol sesquichloroidrex complex, buffered aluminum sulfate, aluminum and zirconium trihydrochloride, aluminum and zirconium tetrahydrochloride, zirconium and zirconium hydrochloride, pentachlorohydrate aluminum and zirconium glycine, tetrachloridrex aluminum and zirconium glycine, pentachloridrex aluminum and zirconium glycine, octachloridrex aluminum and zirconium glycine and combinations thereof. In some cases, the aluminum salt can be prepared by methods well known in the art. In some embodiments, aluminum salts can be prepared by applying heat to a diluted aqueous solution of an aluminum salt (for example, less than 20% of an aluminum salt by weight of the diluted solution) to form a solid aluminum salt. which comprises aluminum hydrolysis polymers. Some non-limiting examples of these methods are described in U.S. Patent Nos. 4,871,525 and 4,359,456. Substantially inert particulate materials
[0070] The balance of the total particulate concentration of an antiperspirant composition may comprise excipient particulate materials that are substantially inert with respect to themselves and / or the antiperspirant active ingredient, which means that there are no interactions between significant particles with respect to each other. and / or the antiperspirant active ingredient when present in the antiperspirant composition. Excipient particulate materials exclude clays and silicas added to an antiperspirant composition as volume or suspension forming agents, as these particles can exhibit strong interactions between particles. Excipient particulate materials can be hydrophilic or hydrophobic (including hydrophobically modified, which tend to be moderately hydrophobic). Some non-limiting examples of substantially inert excipient particulate materials that may be included in an antiperspirant composition include, but are not limited to, encapsulated fragrance materials; native starches such as tapioca, corn, oat, potato and wheat starch particles; baby powder; calcium carbonate; perlite; microspheres of polyethylene and mica. Substantially inert particles can be free flowing. An antiperspirant composition can comprise from about 0.25%, 0.5%, 1%, 5%, 10%, 12% or 14% to about 25%, 22%, 20%, 18% or 16% in weight of antiperspirant composition of substantially inert particles. A substantially inert particulate material believed to be suitable for use is a hydrophilic or hydrophobically modified tapioca starch material. A tapioca starch material can be particularly beneficial as it is unlikely to induce an allergic reaction if inhaled. Tapioca is a starch that can be extracted from the cassava plant, typically from the root, which can then be processed or modified, as known in the art. Tapioca starches are advantageously substantially non-allergenic. A non-limiting example of a hydrophobically modified tapioca starch material suitable for use comprises a silicone-grafted tapioca starch, which is available under the trade name Dry Flo TS from AkzoNobel in the Netherlands. The INCI name is tapioca starch polymethylsilsesquioxane and can be produced by a reaction of sodium methyl siliconate (polymethylsilsesquioxane) and tapioca starch. The silicone-grafted tapioca starch material is commercially available as CAS No. 68989-12-8. The silicone-grafted tapioca starch material can be formed using any known means, including, but not limited to, the methods described in US Patent Nos. 7,375,214, 7,799,909, 6,037,466, 2,852,404, 5,672. 699 and 5,776,476. Other non-limiting examples of hydrophobically modified tapioca starch materials that are suitable for use include Dry Flo AF (silicone modified starch from Akzo Nobel), Rheoplus PC 541 (Siam Modified Starch), Acistar RT starch (available from Cargill) and Lorenz 325, Lorenz 326 and Lorenz 810 (available from Lorenz do Brasil). In some specific embodiments, the tapioca starch material may be hydrophilic to facilitate the release of the antiperspirant active ingredient during use. A non-limiting example of a hydrophilic tapioca starch material suitable for use is available under the trade name of Tapioca Pure available from Akzo Nobel. In some specific embodiments, the substantially inert particulate material comprises a hydrophilic tapioca material, a hydrophobic tapioca material or a mixture thereof.
[0071] An antiperspirant composition may optionally comprise one or more particulate fragrance vehicles or materials that may or may not encapsulate a perfume component. Fragrance vehicles are typically particulate, which would be considered part of the total particulate concentration of the antiperspirant composition. Fragrance vehicles are preferably hydrophobic in order to minimize interactions between particles. Fragrance vehicles can be full or empty. A full fragrance vehicle is a fragrance vehicle that encapsulates, or otherwise contains, a perfume component while the fragrance vehicle is stored within the spray device. Full fragrance vehicles can release perfume components through a variety of mechanisms after applying the spray device to provide an aroma or fragrance experience for a user. For example, perfume components can be released through moisture by moistening the fragrance vehicle, for example, through perspiration or other body fluids. Alternatively or in addition to it, perfume components can be released by fracturing the vehicle, such as by applying pressure or a shear force. An empty fragrance vehicle is a fragrance vehicle that does not contain a perfume component while stored inside the spray device. A non-limiting example of an empty fragrance vehicle is an uncomplexed cyclodextrin material.
[0072] Some non-limiting examples of fragrance vehicles suitable for encapsulating a perfume component include, but are not limited to, oligosaccharides (e.g., cyclodextrins), starches, polyethylenes, polyamides, polystyrenes, polyisoprene, polycarbonates, polyesters, polyacrylates, vinyl polymers, silicas and aluminosilicates. Some examples of fragrance vehicles are described in U.S. Patent No. 2010/0104611; 2010/0104613; 2010/0104612; 2011/0269658; 2011/0269657; 2011/0268802; 5,861,144; 5,711,941; 8,147,808; and 5,861,144.
[0073] An antiperspirant composition can comprise from about 0.25%, 0.5%, 0.75%, 1% or 2% to about 20%, 16%, 12%, 10%, 8%, 6 % or 4% by weight of the fragrance antiperspirant composition. In some cases, the substantially inert excipient particles of the antiperspirant composition essentially consist of or completely filled fragrance vehicles, empty fragrance vehicles or mixtures thereof. An antiperspirant composition can comprise from about 0.25%, 0.5%, 0.75% or 1% to about 6-5, 4-O or 2-o by weight of the antiperspirant composition of filled fragrance vehicles. An antiperspirant composition can comprise from about 0.25%, 0.5%, 1% or 2% to about 16%, 12-o, 10-o, 8-o, 6% or 4% by weight of the composition antiperspirant in empty fragrance vehicles. In some cases, it may be desirable to incorporate a mixture of empty fragrance vehicles and filled fragrance vehicles in the antiperspirant composition, where empty fragrance vehicles can be included to obtain the desired total particulate concentration without the risk of perfume overdosing.
[0074] In some cases, it may be desirable to provide a mixture of fragrance vehicles and native starch powders to obtain the desired particle concentration. For example, a mixture of about 20:80 to 80:20 (fragrance vehicle for starch) can be used. In some cases, a 50:50 mixture can be used and in other instances the native starch powders could have a concentration equal to or less than 6% by weight of antiperspirant composition, while the concentration of the fragrance vehicles can be equal to about or less than 9% by weight of antiperspirant composition.
[0075] A wide variety of perfume components can be used with fragrance vehicles, including, but not limited to, volatile perfume components having a normal pressure boiling point below about 260 ° C, more preferably below about 250 ° C, and perfume components having a low threshold for significant odor detection, and mixtures thereof. The boiling points of various perfume components are shown in, for example, "Perfume and Flavor Chemicals (Aroma Chemicals)," Steffen Arctander, published by the author, 1969. Volume forming and suspending agents
[0076] An antiperspirant composition may comprise a bulking or suspending agent. In some cases, it is desirable to include a bulking or suspending agent in the antiperspirant composition to reduce the risk of cake formation of the antiperspirant composition at the bottom of the container and / or assist in redispersing the antiperspirant composition with significant agitation without nodule formation. , in order to reduce the risk of obstruction of any small orifice without the sprinkler device. This can be particularly useful since the antiperspirant active ingredients are dense and tend to settle quickly and / or may be prone to pie formation in the presence of moisture. Decantation and / or agglomeration of significant particulates in an antiperspirant composition can complicate the application of a uniform dose of the antiperspirant active ingredient from a spray device. This, in turn, can negatively affect the sensation on the skin or contribute to the appearance of a white residue. While other solutions to address redispersion, arrangement and / or pie formation can be used, there can also be disadvantages. For example, U.S. Patent No. 7,815,899 suggests the use of a high viscosity polymeric material (e.g., a functional quaternary ammonium silicone) to reduce the deposition rate. However, this approach may, in some cases, have disadvantages. For example, some quaternary silicones have a strong odor of amine impurities that can interfere with the fragrance of the product. Furthermore, these amines can interact negatively with the active principle through the Lewis acid / base reaction.
[0077] The bulking or suspension agent may be hydrophobic, hydrophilic or comprise mixtures thereof. In some specific embodiments, these materials may be hydrophilic to facilitate the release of the active antiperspirant during use. Some examples of silica materials that can be used include, but are not limited to, colloidal silicas. Some non-limiting examples of silica materials are available from Evonik Industries under the trade names of Aerosil 200SP, Aerosil 300SP and Aerosil R972.
[0078] In some cases, the antiperspirant composition may include a clay material. Some non-limiting examples of clay materials include montmorillonite clays and hydrophobically treated montmorillonite clays. Montmorillonite clays are those that contain mineral montmorillonite and can be characterized by having a suspension lattice. Some examples of such clays include, but are not limited to, magnesium and colloidal aluminum bentonites, hectorites and silicates. Some non-limiting examples of organo-clays include modified bentonite, modified hectorite, modified montorlinite and combinations thereof, some examples of which are available under the trade names Bentone 27 (stearalkonium-bentonite), Bentone 34 (stearalkonium-bentonite) and Bentone 38 ( disteardimônio- hectorita) from Elementis Specialties Plc. and Tixogel VPV (quaternium 90-bentonite), Tixogel VZV (stearalkonium-bentonite), Tixogel LGM (stearalkonium-bentonite) and Claytone SO (stearalkonium-bentonite) available from Southern Clay.
[0079] The antiperspirant composition may also comprise a clay activator, such as propylene carbonate, triethyl citrate, methanol, ethanol, acetone, water and mixtures and derivatives of these substances. Clay activators can also interact strongly with an antiperspirant active ingredient (for example, leading to the formation of nodules or coating of the antiperspirant active ingredient and / or changes in the polymer structure of the active ingredient that can reduce antiperspirant effectiveness). Therefore, it may be desirable to limit the amount of clay activator present in the antiperspirant composition to between about 0.5%, 0.75%, 1%, 1.25% or 1.5% to about 3%, 2% or 1.75% by weight of the antiperspirant composition. III. Sprinkler devices
[0080] To avoid overdose of the antiperspirant composition, it is desirable that the sprinkler device has a total mass flow rate of the propellant / antiperspirant mixture less than 0.5 grams / s or about 0.1 grams / about 0.6 grams / s or about 0.2 grams / s about 0.4 grams / s or about 0.25 grams / s about 0.35 grams / s. The spray device may have a mass flow rate of antiperspirant composition less than 0.3 grams / s or from about 0.1 grams / s to about 0.3 grams / s or about 0.1 grams / s to 0.2 grams / s or about 0.15 grams / s to about 0.2 grams / s. Mass flow rates higher than those described above are believed to lead to a wet or sticky feeling (even if the L / P ratio is within the ranges described above), because the total amount of antiperspirant composition deposited on the skin can be very large.
[0081] The amount of antiperspirant active ingredient applied to a target surface and in a two-second application from a spraying device can be about 40 mg, 50 mg, 60 mg or 70 mg to about 100 mg , 90 mg or 80 mg. The total amount of antiperspirant composition applied to a target surface in a two-second application from a spray device can be from about 0.1 grams to about 0.4 grams or from about 0.2 grams to about 0.4 grams or about 0.2 grams to about 0.3 grams. The amount of liquid fragrance material applied to a target surface in a two-second application from a spray device can be from about 3 mg to about 20 mg or from about 6 mg to about 15 mg or about 6 mg to about 12 mg. The amount of full fragrance vehicles applied to a target surface in a two-second application from a spray device can be from about 0.75 mg to about 15 mg or from about 1 mg to about 12 mg or from about 1 mg to about 9 mg. The spraying device can have a deposition efficiency, of the antiperspirant composition and / or of the antiperspirant active principle and / or of the liquid fragrance material, which is about 60%, 65%, 70%, 75% or 80% at about 95%, 90%, 85% or 80%.
[0082] With reference to Figure 2, a non-limiting example of a spray device that can be used with the antiperspirant and propellant compositions described herein is shown. Although the spray device of Figure 2 is described later as a spray device suitable for use, it will be understood that other spray devices, including other types of actuators and valve assemblies, etc., can also be used with the antiperspirant compositions and propellants described herein. The sprinkler device 100 comprises a container 102, a liquid propellant 104 and an antiperspirant composition 106. It will be understood that propellant 104 and antiperspirant composition 106 are only shown for illustrative purposes in Figure 2, and Figure 2 is not intended to limit however the type or arrangement of the propellant and antiperspirant composition inside the container 102. For example, in some cases, the propellant and the composition are miscible so that different layers are not visible. The spray device 100 can be shaped and configured so that it is portable. Container 102 comprises a frame 108, an actuator 110 having an actuator port 112 and a valve assembly 114 in fluid communication with a reservoir 118 that stores composition 106 and liquid propellant 104. Reservoir 118 can be defined by one or more interior surfaces of structure 108. The reservoir can have a volume of about 20 ml, 40 ml or 60 ml to about 120 ml, 110 ml, 100 ml or 90 ml. A dip tube 119 can extend into the reservoir 118 of the valve assembly. A gaseous propellant 120 can fill the free space of the reservoir 118.
[0083] With reference to Figures 3 to 5, a non-limiting example of a valve assembly 114 that can be attached to structure 108 is shown. The valve assembly 114 comprises a slidingly arranged valve stem 124 to which the actuator 110 attaches, a mounting flange 128 for attaching the valve assembly 114 to the frame 108 (as by crimping) and a housing 130 attached to the flange mounting element 128. The housing 130 can be fixed by various means to the flange, as known in the art, including by adjusting the press, positive locking, welding, etc. The housing 130 contains a spring 132 that tilts the valve stem 124. The spring 132 can comprise a plurality of spirals.
[0084] In Figure 6, the valve stem 124 comprises an upper portion 132 and a lower portion 134. The upper portion 132 has a distal end and is configured to be attached to actuator 110. The lower portion 134 is configured to position at at least a portion of the spring 132 around it. One or more valve stem holes 138 (two are shown in Figures.) Are arranged between the upper portion 132 and the lower portion 134. The valve stem holes 138 are arranged in a radial direction with respect to the longitudinal axis of the stem of the valve 124. The two or more holes in the valve stem 138 open to a wall 140 of a groove 142 and communicate with an axial hole 144 that extends from the two or more holes in the valve stem 138 to the end distant from the upper portion 132. It will be understood that the terms "radial" and "axial", and derivatives of these substances (for example, radially and axially), are simply to refer to a general direction in relation to a feature or structure, and these terms are intended, unless expressly stated to the contrary (for example, only axial or only radial), to be completely inclusive of directions that are not purely radial or axial, as substantially directions radial / axial and combinations of radial and axial directions where the total directional effect is more radial than axial or vice versa. The axial orifice 144 in turn communicates with the actuator 110 when it is attached to the valve stem 124.
[0085] With reference to Figures 2, 5 and 7, the joining of the sealing surfaces formed by an inner wall 146 of a substantially horizontal seal 148 and the wall 140 of the groove 142 forms a valve that seals the holes of the valve stem 138 Seal 148 can be formed from an elastomeric material, such as nitrile butadiene rubber (sometimes called Buna-N). The seal 148 can be arranged around the valve stem and sandwiched between the mounting flange 128 and the housing 130, as shown, for example, in Figure 3. The sealing surfaces are joined when the valve stem is not depressed , as shown in Figure 3, thereby preventing the flow of the antiperspirant / liquid propellant mixture through the holes in valve stem 138. When actuator 110 is depressed, the sealing surfaces separate, thus allowing the antiperspirant composition mixture / liquid propellant through the orifices of valve stem 138 to axial orifice 144 and to actuator 110. As used here, the term valve (as opposed to valve assembly) is intended simply to refer to the union of the sealing surfaces that prevent the mixture flow of the antiperspirant / liquid propellant composition from reservoir 118 to actuator 110. The joining of the sealing surfaces can be provided in configurations actions in addition to those shown in the Figures and described here. In some specific embodiments, the valve can be a continuous flow valve, which means that there is flow through the valve while the actuator is depressed. In contrast, a non-continuous or regulated valve only allows a predetermined amount of flow through the valve regardless of how long the actuator is depressed.
[0086] With reference to Figures 5 and 8 to 12, the housing 130 comprises one or more holes 150 to allow the gaseous propellant to pass from the free space of the reservoir 118 into the interior of the housing 130. The housing 130 has a plurality of fingers 151 for fixing the housing to the mounting flange 128. An insertion element 152, which in some embodiments can be in the shape of a bowl, can be installed inside the housing 130 between the immersed tube and the valve stem 124. The insertion element 152 can be snapped into the housing 130 or otherwise retained within the housing by other means known in the art. The insertion element 152 can receive an end of the spring 132. The insertion element 152 has an insertion hole 154 arranged in a base wall 156 of the insertion element 152. The insertion hole 154 is in fluid communication with the immersed tube 119 and the interior of the insert 152 so that the mixture of the antiperspirant / liquid propellant composition can flow from the immersed tube 119 into the insert of the insert 152. The mixture then flows through the spring 132 and into the valve.
[0087] A plurality of passages 158 are disposed between the immersed tube 119 and the distal end of the valve stem 124. Although two passages are shown, it is contemplated that more than two passages can be provided. The passages 158 are disposed adjacent to the outlet of the immersed tube and / or the tail hole 160 (Figure 5), the tail orifice 160 being disposed just downstream of the outlet of the immersed tube. For the sake of clarity, the passages 158 of the valve assembly 114 are considered to be disposed adjacent to the immersed tube 119 even if there is a tail hole intervening 160, located between the outlet of the immersed tube and the passages 158. Passages 158 can be arranged on a bottom surface 162 of the base wall 156 of the insertion element 152, and the outlets of the passage 164 are arranged in a position adjacent to the insertion hole 154 and the tail hole 160 so that the gaseous propellant passes through the passages 158 collides with the mixture of the antiperspirant / liquid propellant composition leaving the tail hole 160. Although the passages 158 are shown arranged on the bottom surface 162 of the insertion element, it is contemplated that the passages 158 can be provided by other structures / arrangements . If a steam valve arrangement is provided, the passage (s) 158 may have a total cross-sectional area of about 0.05 mm2 to about 0.4 mm2.
[0088] Although the passages 158 are shown as generally rectangular in shape in cross section, it will be understood that the passages 158 can be provided in other formats and sizes. Similarly, although the various holes are shown and described here as generically in circular / cylindrical shape, it will be understood that they can be supplied in other shapes and sizes. In addition, although the vapor valve arrangements shown in the Figures allow the gaseous propellant to mix with the antiperspirant / liquid propellant composition upstream of the valve, other provisions of the vapor valve (or non-vapor valve) can be implemented as known in the art. For example, a steam valve arrangement can be provided where the gaseous propellant mixes downstream of the valve, perhaps even within the valve assembly or within the actuator. Multiple steam valve arrangements can also be provided. For example, a first vapor valve arrangement may provide the mixture of gaseous propellant and the mixture of the antiperspirant / liquid propellant composition upstream of the valve, although a second arrangement of the vapor valve may provide the mixture of additional gaseous propellant and the mixture. antiperspirant composition downstream of the valve. Although the valve assembly is shown in the present invention as comprising a variety of components, it is envisaged that these components can be altered, combined, erased, or replaced with other components or structures without, therefore, departing from the character and / or of the scope of the various invention (s) described herein. For example, the various valve configurations illustrated in U.S. Patent No. 4,396,152 can also be used. Similarly, the container and the actuator can be supplied in a variety of alternative shapes and configurations.
[0089] An example of a valve assembly having the general configuration shown in Figure 5 is available from the Precision Valve Company (USA) under the trade name Ecosol.
[0090] A user of a spray device can initiate a spray by depressing an actuator, thereby opening a valve that allows the mixture of liquid propellant / antiperspirant composition to exit the actuator. Before actuation, it may be desirable to stir or rotate the product to redisperse the liquid and particulate materials. Although usage time can vary widely, users can depress the actuator from about 2 seconds to about 5 seconds or from about 2 seconds to about 4 seconds or from about 2 seconds to about 3 seconds to provide a explosion of antiperspirant composition for deposition on the skin surface of an armpit. A sprinkler device can be sized to provide a total sprinkling time of about 60 seconds to about 200 seconds or from about 70 seconds to about 150 seconds or from about 90 seconds to about 130 seconds, thereby providing , 2-second uses of about 15 to about 50 seconds before exhaustion. IV. Measuring methods Concentration of propellant and concentration of antiperspirant composition
[0091] The overcap (if present) of the product container is removed, and the weight of the container and its content (gross mass) is measured using any suitable balance, such as an analytical balance. The top of the container is drilled using any suitable tool, such as an AC-PD aerosol can drill device available from Aero-Tech Laboratory Equipment Company, LLC of Missouri, USA. The drill needle is fully extended into the container, and the drill needle is slowly removed to allow the gaseous propellant to exit the container. After the piercing needle is completely removed from the container, the piercing device can be removed from the container, and the propellant will continue to come out of the piercing in the container. All propellant is removed from the container.
[0092] The mass of the container and the remaining contents (minus the propellant) are measured using any suitable device, such as an analytical balance. The actuator is removed from the container using any suitable device, such as an Aero-Tech Can Decrimper available from Aero-Tech Laboratory Equipment Company, LLC of Missouri, USA. The inside of the container is rinsed with ethanol until visually clean, and the container is left to dry for at least 2 hours. The mass of the empty container and actuator is measured using any suitable device, such as an analytical balance. The mass and concentration of propellant can be determined using the following equations:
The concentration of the antiperspirant composition can be derived from the following equation:% Concentration of the antiperspirant composition = 100 -% concentration of propellant Total mass flow rate
[0093] This measurement method is preferably used with aerosol antiperspirant products that comprise a continuous actuator, which means that actuating the actuator results in a continuous rather than intermittent spray. At least four samples of aerosol antiperspirant product are tested. The product samples are agitated as indicated, and the actuator is activated for 2 to 3 seconds, after which, each product sample is weighed to measure its mass using any suitable device, such as an analytical balance. The product samples are then immersed in a constant temperature bath (25 ° C) until the internal pressure stabilizes at a temperature of 25 ° C. The product samples are then removed from the bath and the excess moisture is removed with a paper towel. The product samples are agitated as indicated, and the actuator is activated for 5 seconds, which can be accurately measured using a stopwatch. Each product sample is weighed again, and then the product samples are returned to the constant temperature bath. The bathing, actuation and weighing process is repeated three times for each product sample. The average total mass flow rate can be calculated from the spray time (5 seconds) and the difference in mass before and after each five-second spray calculated by the four product samples and three repetitions per product sample. Mass flow rate of the antiperspirant composition
[0094] This measurement method is preferably used with aerosol antiperspirant products that comprise a continuous actuator, which means that actuating the actuator results in a continuous rather than intermittent spray. At least four samples of aerosol antiperspirant product are tested. The product samples are agitated as indicated and then immersed in a constant temperature bath (25 ° C) until the internal pressure stabilizes at a temperature of 25 ° C. The product samples are then removed from the bath and the excess moisture is removed with a paper towel. Each product sample is weighed to measure its mass using any suitable device, such as an analytical balance. Twelve large plastic bags (one for each product sample times three repetitions) having an adequate volume, such as a 1 L Ziploc brand bag (or a 1559.2 g (55 oz) Whirl-Pak Write-on bag), part no. B01195WA available from Nasco, Inc), are weighed to measure their mass using any suitable device, such as an analytical balance. Each product sample is agitated, as indicated, and sprayed in one of the bags for a period of 5 seconds in order to prevent the antiperspirant composition from leaving the bag. For example, the opening through which the sprinkler enters the bag can be limited to about 5 cm. The spray time of 5 seconds can be accurately measured using a stopwatch. After the 5-second spray interval, the antiperspirant composition is allowed to settle inside the bag, and the bag remains open for at least 1 minute, but no more than 2 minutes, to allow the liquid propellant to evaporate. The weight of the bags and their contents are weighed to measure their mass, and the product samples are also weighed. The average mass flow rate of the antiperspirant composition can be determined using the following equation which is calculated by the four product samples and the three repetitions per product sample: Antiperspirant Composition Mass Flow Rate (g / s) = ( Weight of Bag and Antiperspirant Composition - Weight of Bag) / 5 seconds Efficiency of deposition of antiperspirant composition, amount dispensed and amount deposited
[0095] At least four samples of aerosol antiperspirant product are tested. The product samples are agitated, as indicated, and the actuator is activated for 2 to 3 seconds, after which, each product sample is weighed to measure its mass using any suitable device, such as an analytical balance. The product samples are then immersed in a constant temperature bath (25 ° C) until the internal pressure stabilizes at a temperature of 25 ° C. At least twelve pieces of filter paper, such as Whatman 150 mm (diameter) filter paper available under catalog number 1003-150 from the Whatman Company in the United Kingdom, are weighed to measure the mass of the filter using any suitable device, such as an analytical balance. The product samples are removed from the bath, and any excess moisture is removed by wiping with a paper towel. The product samples are agitated, as indicated, and the product sample is positioned approximately 15 cm from one of the paper filter papers, which is preferably weighed and / or fixed to ensure that the filter paper does not move during sprinkling. The product sample actuator is activated for 5 sequences that can be accurately measured using a stopwatch. It will be understood, however, that other spraying times may serve as substitutes. For example, a spray time interval of two seconds can be used to obtain a better approximation of the amount dispensed / deposited during a typical usage cycle by a consumer. The spraying of the product sample can be centered in the center of the filter paper. After spraying, the filter paper and product sample are weighed to measure the mass using any suitable device, such as an analytical balance. The bathing, weighing and turning steps are repeated three times for each of the product samples. The average efficiency of the antiperspirant composition can be calculated using the following equations, calculated for the four product samples and the three repetitions per product sample:
Efficiency of deposition of the antiperspirant active ingredient, amount dispensed and amount deposited
[0096] At least four samples of aerosol antiperspirant product are tested. The product samples are agitated, as indicated, and the actuator is activated for 2 to 3 seconds, after which, each product sample is weighed to measure its mass using any suitable device, such as an analytical balance. The product samples are then immersed in a constant temperature bath (25 ° C) until the internal pressure stabilizes at a temperature of 25 ° C. The product samples are then removed from the bath and the excess moisture is removed with a paper towel. At least twelve filter papers, such as Whatman 150 mm filter paper available under catalog number 1003-150 from the Whatman Company UK, are weighed to measure the mass of the filter using any suitable devices, such as a scale analytical. The product samples are removed from the bath, and any excess moisture is removed by wiping with a paper towel. The product samples are agitated, as indicated, and the product sample is positioned approximately 15 cm from one of the paper filter papers, which is preferably weighed and / or fixed to ensure that the filter paper does not move while sprinkling. The product sample actuator is activated for 5 seconds, which can be accurately measured using a stopwatch. It will be understood that other spray times may serve as substitutes. For example, a spray time interval of two seconds can be used to obtain a better approximation of the amount dispensed / deposited during a typical cycle of use by a consumer. The spraying of the product sample can be centered in the center of the filter paper. After spraying, the filter paper and product sample are weighed to measure the mass using any suitable device, such as an analytical balance. The bathing, weighing and turning steps are repeated three times for each of the product samples. The amount of antiperspirant active ingredient deposited on a filter paper can be determined using an automated titrator, such as the MettlerDL-70 equipped with a Mettler DM141C silver-silver chloride combination electrode available from Mettler, Inc. Alternatively, the amount of antiperspirant active ingredient deposited on a filter paper can be determined using the chloride content method presented in the US Pharmacopoeia monograph on aluminum hydrochloride (US Pharmacopoeia 35) or an equivalent method. The average deposition efficiency of the antiperspirant active ingredient can be calculated using the following equations, calculated for the four product samples and the three repetitions per product sample:
V. Examples
[0097] The following examples are provided for illustrative purposes only and should not be considered as a limitation of the present invention, since many variations of it are possible, without deviating from the character and scope of the invention. Examples 1, 2 and 3
[0098] Examples 1, 2 and 3 illustrate the effect that the total particulate concentration can have on viscosity and the effect that viscosity can have on "runoff".
Values are shown by weight of the antiperspirant composition. 1 86% anhydrous active ingredient assay, average particle size approximately 15 microns. 2 Pure Tapioca available from Akzo Nobel 3 Bentone 38 available from Elementis
[0099] The antiperspirant compositions of Examples 1 to 3 were made using the following general batch method: a first portion of dimethicone was added to a properly sized container followed by clay and the mixture was ground for at least 2 minutes at a time. speed from 10,000 to 12,000 rpm using a hand grinder. Triethyl citrate was added to the mixture and ground for at least 2 minutes. The rest of the dimethicone was added to the mixture and ground for at least 2 minutes. The antiperspirant active ingredient, tapioca starch, betacyclodextrin fragrance and liquid perfume were added to the mixture and ground for at least 2 minutes.
[0100] Approximately 0.1 ml of the antiperspirant compositions of Examples 1, 2 and 3 was deposited, using a syringe, on the skin-simulating samples positioned horizontally attached to a lower layer of black cardboard. A description of the material that simulates the skin can be found in U.S. Patent No. 8,124,064 (col. 8, lines 30 to 47). The bottom layer of cardboard was then rotated to an upright position for approximately 10 seconds. The drip length was then measured. This process was repeated three times. Figure 13 is a photograph of a set of three antiperspirant compositions on the material that simulates the skin after about 10 seconds in an upright position. The antiperspirant compositions of Example 1 had an average drip length of 40 mm (range = 38 mm to 42 mm). The antiperspirant compositions of Example 2 had an average drop length of 20.6 mm (range = from 20 mm to 22 mm), and the antiperspirant compositions of Example 3 had an average drop length of 11 mm (range = 10 mm to 12 mm). Examples 4 to 9
[0101] Examples 4 to 9 illustrate the effect that the concentration of silicone gum can have on the spray pattern.

Values are shown by weight of the antiperspirant composition. 1 86% anhydrous active ingredient assay, average particle size approximately 15 microns. 2 Pure tapioca available from Akzo Nobel 3 Bentone 38 available from Elementis 4 DC1503 (a mixture of dimethicone and dimethicone) available from Dow Corning. DC1503 comprises approximately 12% by weight of the mixture of a silicone gum (dimethicone).
[0102] The antiperspirant compositions of Examples 4 to 9 were made using the following general batch method: a first portion of dimethicone was added to a properly sized container followed by clay, and the mixture was ground for at least 2 minutes at a speed of 10,000 to 12,000 rpm with the use of a hand grinder. Triethyl citrate was added to the mixture and ground for at least 2 minutes. The remainder of the dimethicone and silicone gum material was added to the mixture and ground for at least 2 minutes. The antiperspirant active ingredient, tapioca starch, betacyclodextrin fragrance and liquid perfume were added to the mixture and ground for at least 2 minutes. The antiperspirant compositions were added to the product container together with propellant A-31 to obtain a propellant concentration of 65% by weight of the total filling of the materials. The antiperspirant composition was sprayed onto black cardboard from a distance of approximately 15.2 cm (6 inches) for approximately 2 seconds. The spray pattern diameter and deposition characteristics are shown below
Examples 10 to 15
[0103] Examples 10 to 15 illustrate the effect that the increase in the L / P ratio can have on a residue in an antiperspirant composition that comprises a non-volatile silicone fluid

[0104] The antiperspirant compositions were combined with propellant A-46 in a sprinkler at a ratio of 80% propellant to 20% antiperspirant composition. Although this is a higher concentration of propellant than the other examples, the residue measurements are adjusted according to the amount deposited and, therefore, it is believed that the observations also apply to lower concentrations of propellant. The antiperspirant spray devices were shaken and then the antiperspirant composition was sprayed on a black artificial leather material, Naugahyde, available from Uniroyal Engineered Products LLC from a distance of about 15 cm (6 inches). The target surface was about 15 cm x 10 cm in size. The spraying time was about 4 seconds and the target surface was coated as evenly as possible. The amount of antiperspirant composition deposited on the naugahyde material was determined by weighing the material before and after applying the antiperspirant composition. The value of L (L * in the color space L * A * B *) of the antiperspirant composition on the treated naugahyde material was measured at three different locations on the surface using a colorimeter (for example, Model CR-400 available with Konica-Minolta, Japan). The L values of an untreated naugahyde surface were also measured at three locations using the colorimeter. The whiteness of the antiperspirant composition (for example, observable residue) was approximated by subtracting the mean value of L derived from three colorimeter measurements of the naugahyde untreated surface from the mean L value derived from three colorimeter measurements. of the treated naugahyde surface divided by the amount of deposited antiperspirant composition. Examples 16 to 23
[0105] Examples 16 to 23 illustrate the effect that the concentration of active antiperspirant particulate and / or the A / P ratio can have on an adhesion of the antiperspirant composition after wetting.

Values are shown by weight of the antiperspirant composition. 1 86% anhydrous active ingredient assay, average particle size approximately 15 microns. 2 Pure tapioca available from Akzo Nobel 3 Bentone 38 available from Elementis 4 DC1503 (a mixture of dimethicone and dimethicone) available from Dow Corning. DC1503 comprises approximately 12% by weight of the mixture of a silicone gum (dimethicone).
[0106] Examples 16 to 23 were made using the following general batch method: a first portion of dimethicone was added to a properly sized container followed by clay and the mixture was ground for at least 2 minutes at a speed of 10,000 at 12,000 rpm using a hand grinder. Triethyl citrate was added to the mixture and ground for at least 2 minutes. The remainder of the dimethicone and silicone gum material was added to the mixture and ground for at least 2 minutes. The antiperspirant active ingredient, tapioca starch, betacyclodextrin fragrance and liquid perfume were added to the mixture and ground for at least 2 minutes.
[0107] Approximately 0.3 to 0.305 g of each antiperspirant composition was added to a 6-drachma flask and then about 65 microliters of water were added. The flask was sealed and a vortex mixer was used for 1 minute to mix the materials. After mixing, the antiperspirant composition was subjected to the following method to measure its adhesion or tackiness. The method measures the force (gF) necessary to separate two surfaces that have an antiperspirant composition disposed between them. The lower gram-force (gF) measurements are indicative of less stickiness and liquidity (moisture). Measurements are performed using a TA XT plus texture analyzer, such as the one available from Stable Micro Systems (Surrey England), which used a cylinder probe. Pieces of 25 mm in diameter from the Leneta card are affixed to the cylinder probe and the base of the actuator. 0.03 to 0.0305 g of a sample of the antiperspirant composition are placed between the Lineta cards, and the instrument is then configured to compress the cards with a force of 2.0 N (200 gF) for 2 seconds and then , separated at a speed of 10 mm / s. The amount of force required to separate the cards is measured as the two are separated. This was repeated 30 times and the first 5 repetitions were calculated to determine a gF of the composition. The average gF values of each antiperspirant composition, together with the total particulate concentration and the A / P ratio of the antiperspirant composition are shown in the Table above. The antiperspirant composition of Example 23 contained build-up within the composition, as did Example 22 (although observed to a lesser extent in Example 23), and is believed to have affected the gF values. Examples 24, 25, 26 and Comparative example 27
[0108] Examples 24, 25 and 26 describe and demonstrate, in more detail, some non-limiting examples of antiperspirant compositions made according to the invention, while Example 27 is a comparative antiperspirant composition. The examples are provided for illustrative purposes only and should not be considered as a limitation of the present invention, since many variations of it are possible, without deviating from the character and scope of the invention.

Values are shown by weight of the composition
[0109] The antiperspirant compositions of Examples 24 to 26 were made using the following general batch method: non-volatile silicone fluid (and volatile silicone fluid in the case of Comparative Example 27) was added to a suitably sized container followed by silica (or clay in the case of Example 24), and the mixture was ground for at least 1 minute at a speed of 10,000 to 12,000 rpm using a hand grinder. In the case of example 24, triethyl citrate was then added to the mixture and ground for at least 5 minutes. Particles of the antiperspirant active ingredient were added to the mixture and ground for at least 1 minute (Examples 25, 26 and 27) or at least 5 minutes (Example 24). Tapioca starch material and the fragrance of betacyclodextrin were added to the mixture and ground for at least one minute (Examples 25, 26 and 27) or at least 5 minutes (Example 24). The perfume was then added (and in the case of Example 24, the silicone gum) and ground for at least one minute.
[0110] The antiperspirant compositions of Example 24 had an average viscosity of approximately 1,500 centipoise, and the antiperspirant compositions of Example 25 had an average viscosity of approximately 4,200 centipoise. The antiperspirant compositions of Example 26 had an average viscosity of approximately 3,000 centipoise. The antiperspirant compositions of Comparative Example 27 had an average viscosity of approximately 1,400 centipoise. Viscosity measurements were made using a Brookfield viscometer model 1 / 2RVT using an RV-4 axis using techniques well known in the art. The desired weight (approximately 15 g) of the antiperspirant composition was transferred to 55 ml product containers to which a valve assembly was attached. Approximately 15 g of propellant A-46 was added to the product containers to obtain a 50% concentration of propellant and a 50% concentration of antiperspirant composition by weight of the total filling of the materials.
[0111] The average pressure within the reservoir was approximately 375 kPa for aerosol products containing the antiperspirant composition of Example 24 and approximately 393 kPA for aerosol products containing the antiperspirant composition of Example 25. The average pressure within the reservoir was approximately 365 kPA for aerosol products containing the antiperspirant composition of Example 26. The average pressure inside the reservoir was approximately 379 kPA for aerosol products containing the antiperspirant composition of Comparative Example 27. The pressure within the reservoir was measured with use of a pressure gauge and techniques well known in the art. The valve assembly was similar to that shown in Figures 2 to 12, having a radial hole 160 with a diameter of approximately 0.33 mm and two passages 180 each having a width of approximately 0.25 mm and a height of approximately 0, 33 mm. An actuator having a discharge port 112 with a diametric dimension of approximately 0.33 mm was fitted to the valve assembly.
[0112] Aerosol products comprising the antiperspirant composition of Example 24 had an average total mass flow rate of approximately 0.37 g / s and an average antiperspirant composition flow rate of approximately 0.17 g / s. Aerosol products comprising the antiperspirant composition of Example 25 had an average total mass flow rate of approximately 0.38 g / s and an average antiperspirant composition flow rate of approximately 0.18 g / s. Aerosol products comprising the antiperspirant composition of Example 26 had an average total mass flow rate of approximately 0.36 g / s and an average antiperspirant composition flow rate of approximately 0.17 g / s. Aerosol products comprising the antiperspirant composition of Comparative Example 27 had an average total mass flow rate of approximately 0.39 g / s and an average antiperspirant composition flow rate of approximately 0.18 g / s.
[0113] An in vivo study was conducted using aerosol products that comprise the antiperspirant compositions of Examples 24, 25 and 26 and an aerosol antiperspirant product available for sale. The list of commercially available product ingredients was as follows: butane, isobutene, propane, cyclomethicone, aluminum hydrochloride, perfume, disteardimony hectorite, dimethicone, PVM / MA copolymer, sodium starch octenylsuccinate, mannitol, alpha isomethyl ionone, butylphenyl methylpropional, citronelol, eugenol, geraniol, cinnamal hexyl, 1-limonene and linalool. The commercially available aerosol antiperspirant product had an average propellant concentration of approximately 85% and an average reservoir pressure of approximately 410 kPA. The commercially available antiperspirant product had an average total mass flow rate of approximately 1.02 g / s and an average antiperspirant composition mass flow rate of approximately 0.20 g / s.
[0114] 48 individuals participated in the study, 45 of whom completed the study. The study lasted 26 days, comprising an elimination period of 21 days in which the individuals did not use antiperspirant products (only deodorant products were applied) followed by a 5-day treatment period with aerosol antiperspirants. The antiperspirant products were applied once every morning, for 2 seconds from a distance of 15.2 centimeters (6 inches) by the clinical team, during the 5-day treatment period. The evaluations of the hot sweat room were conducted before the start of the 5-day treatment period (baseline) and 12 hours after the 5th day of the treatment period. The values of the adjusted sweat mean (mg of sweat) at the beginning of the study (baseline) and twelve hours after day 5 of treatment are shown in Table 2 below.


[0115] After five days of treatment, aerosol antiperspirant products comprising the antiperspirant compositions of Examples 24, 25 and 26 resulted in lower mean sweat values (mg of sweat) twelve hours after day 5 of treatment than the antiperspirant product available for sale and Comparative Example 27. A lower average sweat value means that less perspiration was released from the eccrine glands in the armpits to the skin surface, and therefore the antiperspirant product showed greater product effectiveness. The results of the aerosol products of Examples 25 and 26 were statistically significant (with a confidence interval of at least 90%). The results of the composition of Example 26 are particularly noteworthy, since that composition had the lowest concentration of antiperspirant active ingredient among Examples 24, 25 and 26 and also had the lowest average sweat value after treatment among the tested antiperspirant compositions . This may be due to the high concentration of dimethicone, which may have increased the adherence of the active antiperspirant to the skin compared to the antiperspirant compositions of Examples 24 and 25. The commercially available product, which had the highest concentration of propellant, had the highest average sweat value after treatment, despite having the highest antiperspirant mass flow rate among the products. This may be due, at least in part, to the low deposition efficiency of the commercially available antiperspirant composition in combination with a lack of adherence to the antiperspirant active ingredient resulting from the use of a volatile silicone fluid as a liquid carrier. The average sweat value after treatment with the antiperspirant compositions of Example 25 was directionally better than the value of the compositions of Example 26, possibly due to the hydrophilic tapioca material that allowed a better release of the active antiperspirant compared to the material of hydrophobically modified tapioca from Example 26. The average sweat value after treatment with antiperspirant compositions in Comparative Example 27 was directionally worse than the value of the antiperspirant compositions in Example 25. This may be due to the adherence of the active antiperspirant resulting from the use of the volatile silicone fluid in Comparative Example 27 compared to the use of a non-volatile silicone fluid in the antiperspirant compositions of Example 25.
[0116] The dimensions and values presented in the present invention should not be understood as being strictly limited to the exact numerical values mentioned. Instead, unless otherwise specified, each of these dimensions is intended to mean both the mentioned value and a range of functionally equivalent values around that value. For example, a dimension shown as "40 mm" is intended to mean "about 40 mm". All numerical values (for example, dimensions, flow rates, pressures, concentrations, etc.) referred to in the present invention are modified by the term "about", even if not expressly specified with the numerical value.
[0117] Each document cited in the present invention, including any patent or patent application in cross-referenced or related reference, including, but not limited to, US patent application No. 61 / 701,201 filed on September 14, 2012, is by incorporated herein in its entirety for reference purposes unless expressly excluded or otherwise limited. The citation of any document is not an admission that it is prior art in relation to any invention presented or claimed in this document, or that it, alone or in any combination with any other reference or references, teaches, suggest or present any invention like that. In addition, if there is a conflict between any meaning or definition of a term mentioned in this document and any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this document will take precedence.
[0118] Although particular embodiments of the present invention have been illustrated and described, it should be apparent to those skilled in the art that various other changes and modifications can be made without departing from the character and scope of the invention. Therefore, it is intended to cover in the appended claims all such changes and modifications that fall within the scope of the present invention.

权利要求:
Claims (20)
[0001]
1. Aerosol antiperspirant composition characterized by the fact that it comprises: a liquid propellant having a concentration of 30% to 65% by weight of aerosol antiperspirant composition; an antiperspirant composition comprising one or more liquid materials comprising 70% to 100% by weight of the liquid materials of non-volatile polydimethyl siloxane fluid, wherein the one or more liquid materials have a concentration of 40% to 70% in weight of antiperspirant composition; antiperspirant active particulates; one or more active non-antiperspirant particulates that are inert; and wherein the antiperspirant composition has a total particulate concentration of 30% to 60% by weight of antiperspirant composition, and the antiperspirant composition has a viscosity of 1,000 centipoise to 50,000 centipoise.
[0002]
2. Aerosol antiperspirant composition according to claim 1, characterized by the fact that the antiperspirant composition is in the form of a dispersion.
[0003]
3. Aerosol antiperspirant composition according to claim 1, characterized by the fact that one or more liquid materials of the antiperspirant composition consist of non-volatile polydimethyl siloxane fluid, a liquid fragrance material and a silicone gum.
[0004]
4. Aerosol antiperspirant composition according to claim 1, characterized by the fact that it additionally comprises a particulate fragrance material that has a concentration of 0.25% to 5% by weight of the antiperspirant composition.
[0005]
5. Aerosol antiperspirant composition according to claim 1, characterized in that it additionally comprises a liquid fragrance material containing a concentration less than 4% by weight of the antiperspirant composition.
[0006]
6. Aerosol antiperspirant composition according to claim 1, characterized by the fact that non-volatile silicone fluids have a concentration of 40% to 55% by weight of the antiperspirant composition.
[0007]
7. Aerosol antiperspirant composition according to claim 1, characterized by the fact that the total particulate concentration is 40% to 50% by weight of the antiperspirant composition.
[0008]
8. Aerosol antiperspirant composition according to claim 1, characterized by the fact that the antiperspirant composition is completely free of a silicone gum.
[0009]
9. Aerosol antiperspirant composition, according to claim 1, characterized by the fact that the ratio between total liquid materials and total particulate materials is 0.6 to 1.4.
[0010]
10. Aerosol antiperspirant composition according to claim 1, characterized in that the polydimethyl siloxane fluid consists of a polydimethyl siloxane fluid that has a viscosity from 5E-6 to 0.0004 square meters per second (5 to 350 cSt).
[0011]
11. Antiperspirant composition according to claim 1, characterized by the fact that the one or more liquid materials comprise less than 10% by weight of volatile silicone fluids.
[0012]
12. Antiperspirant composition according to claim 1, characterized by the fact that the antiperspirant composition is completely free of volatile silicone fluids.
[0013]
13. Aerosol antiperspirant composition according to claim 1, characterized by the fact that the particles of the antiperspirant active have a concentration less than 34% by weight of the antiperspirant composition.
[0014]
14. Aerosol antiperspirant composition according to claim 1, characterized by the fact that it additionally comprises one or more volume or suspension forming materials selected from the group consisting of a silica material, a clay material and combinations of themselves.
[0015]
15. Aerosol antiperspirant composition, according to claim 1, characterized by the fact that the one or more active non-antiperspirant particles are selected from the group consisting of particulate fragrance materials, native starches and combinations thereof.
[0016]
16. Aerosol antiperspirant composition according to claim 1, characterized by the fact that the antiperspirant composition has a viscosity of 3,000 centipoise to 40,000 centipoise.
[0017]
17. Aerosol antiperspirant composition according to claim 1, characterized by the fact that the liquid propellant has a concentration of 50% to 65% by weight of the aerosol antiperspirant composition.
[0018]
18. Aerosol antiperspirant composition according to claim 1, characterized by the fact that the ratio between the concentration of antiperspirant particulate and the concentration of total particulate is less than or equal to about 0.75.
[0019]
19. Product characterized by the fact that it comprises a reservoir (118), an actuator (110) comprising an actuator orifice (112) and a valve in fluid communication with the actuator orifice (112) and the reservoir, 4 / 4 the reservoir stores an aerosol antiperspirant composition as defined in any of the preceding claims.
[0020]
20. Product according to claim 19, characterized by the fact that the antiperspirant composition is sprayed on the surface of the armpit.

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法律状态:
2018-03-06| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|

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2018-03-13| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|

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2018-03-20| B06I| Technical and formal requirements: publication cancelled|Free format text: ANULADA A PUBLICACAO CODIGO 6.6.1 NA RPI NO 2462 DE 13/03/2018 POR TER SIDO INDEVIDA. |

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2019-05-21| B06T| Formal requirements before examination|

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2019-10-15| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application according art. 36 industrial patent law|

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2020-04-07| B09A| Decision: intention to grant|

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2020-09-15| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 13/09/2013, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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US201261701201P| true| 2012-09-14|2012-09-14|

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US61/701,201|2012-09-14|

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PCT/US2013/059685|WO2014043487A2|2012-09-14|2013-09-13|Aerosol antiperspirant compositions, products and methods|

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