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    • 专利摘要:
    "PROCESS FOR THE PREPARATION OF A COMPOSITION INCLUDING COPPERYLENE OF HETEROPHASIC PROPYLENE AND TALK". The present invention relates to a process for the preparation of a composition including a heterophasic propylene copolymer, a propylene copolymer and talc; the composition has a flow rate in the range of 1 to 200 dg / min as measured according to ISO 1133 (2.16 kg / 230 ºC) including the steps of (a) mixing by melting a propylene copolymer with a talc to obtain a master batch, and (b) mixing by melting the master batch with the heterophasic propylene copolymer and a peroxide to obtain the composition including a heterophasic polypropylene copolymer, a propylene and talc copolymer, where the amount of peroxide is chosen such that a composition including a heterophasic propylene copolymer, a propylene copolymer and a talc having the desired melt index is obtained.
    公开号:BR112015005850B1
    申请号:R112015005850-7
    申请日:2013-09-17
    公开日:2021-02-23
    发明作者:Marc Herklots
    申请人:Saudi Basic Industries Corporation；
    IPC主号:
    专利说明:

    [001] The present invention relates to a process for the preparation of a composition including a heterophasic propylene copolymer and talc, to a composition obtained or obtainable by such a process and to the use of such a composition.
    [002] Heterophasic propylene copolymers, also known as propylene copolymers for impact or propylene block copolymers are an important class of polymers due to their attractive combination of mechanical properties, such as, for example, impact strength over a wide range of temperature and its low cost. These copolymers find a wide range of applications from the consumer industry (for example, packaging and appliances), to the automotive industry and electrical applications.
    [003] In the industry, there is a continuous demand for methods to modify the rheology of polyolefins in liquid phase, in particular to reduce their viscosity. Viscosity reduction is also generally described as "viscorreduction", "melt change", "rheology modification" or "rheology control". It is known that peroxides (organic) can be used to reduce viscosity. There are different ways in which (organic) peroxides behave in conventional degradation processes under heating and melting conditions. On the one hand, under certain process conditions, peroxides initially decompose to produce free radicals, which then abstract hydrogen from a tertiary carbon in the propylene backbone to form free radicals in the polymer, which further recombine. On the other hand, peroxides initiate a breakdown of the longer chains of the polymer molecules and, subsequently, this results in a decrease in the viscosity of the polymer, an increase in the flow rate, and a narrower molecular weight distribution, such characteristics being directly responsible for polypropylene's enhanced flow properties to make the product more suitable for certain applications.
    [004] It is known to add peroxides to the heterophasic propylene copolymer to obtain polypropylene copolymers for impact having a higher flow rate. This makes it possible, for example, to obtain several propylene copolymers for impact with different flow rates of a single base grade.
    [005] An example of such a "fusion changer" process is described in US2005 / 0277742A2. US2005 / 0277742A2 discloses a process for the preparation of a rheology-controlled heterophasic propylene copolymer by degradation of a propylene with a linear dialkyl peroxide having a backbone containing at least 6 carbon atoms and a double or triple bond including the steps of or: a ) Reactor polymerization of a heterophasic propylene copolymer; b) Extrusion of the propylene heterophasic copolymer from step (a), with such a linear dialkyl peroxide having a skeleton containing at least 6 carbon atoms and a double or triple bond, and optionally with one or more fillers (s), in an extruder, at a temperature sufficient to keep the copolymer in the molten state; or c) Extrusion of the propylene (co) polymer of the step with such linear dialkyl peroxide having a backbone containing at least 6 carbon atoms and a double or triple bond, optionally with one or more elastomeric modifier (s) and / or one or more filler (s), in an extruder, at a temperature sufficient to keep the copolymer in the molten state.
    [006] To increase the stiffness of the heterophasic propylene copolymer, talc can be added as a filler. However, when the stiffness of the heterophasic propylene copolymer is increased by talc, more peroxide is needed in order to obtain the same increase in the flow rate of a heterophasic propylene copolymer when compared when talc is not present in the heterophasic propylene copolymer. The use of high amounts of peroxides is undesirable, as high amounts of typical peroxide degradation products, for example, methane and acetone, can lead to safety problems during the manufacturing process. In addition, the use of high amounts of peroxides adds to the cost of heterophasic polypropylene, which is undesirable from an economic point of view. Finally, the use of high amounts of peroxide leads to high amounts of peroxide degradation products and impurities in the final polymer. These peroxide degradation products can be released during the lifetime of the heterophasic propylene copolymer composition, which is undesirable, as they can cause unpleasant odors and can affect organoleptic properties. In addition, high amounts of peroxide degradation products make the heterophasic propylene copolymer unsuitable for food contact applications.
    [007] Therefore, it is an objective of the invention to provide a heterophasic polypropylene composition that combines high rigidity with good impact strength and high fluidity, but which does not contain a large amount of peroxide degradation products.
    [008] This objective is achieved by a process for the preparation of a composition including a heterophasic propylene copolymer, a propylene and talc copolymer, where the heterophasic propylene copolymer consists of: (a) a propylene based matrix, where the propylene-based matrix consists of a propylene homopolymer and / or a propylene-α-olefin copolymer consisting of at least 70% by weight of propylene and up to 30% by weight of α-olefin, for example ethylene, based on mass total of the propylene-based matrix, where the propylene-based matrix is present in an amount of about 60 to 95% by weight based on the total heterophasic propylene copolymer and (b) a dispersed ethylene-α-olefin copolymer, where the dispersed ethylene-α-olefin copolymer is present in an amount of 40 to 5% by weight based on the total heterophasic propylene copolymer and where the sum of the total amount of the propylene-based matrix and the total amount of the copolymer d and ethylene-α-olefin dispersed in the heterophasic propylene copolymer is 100% by weight. where the composition has a flow rate in the range of 1 to 200 dg / min as measured according to ISO 1133 (2.16 kg / 230 ° C) including the steps of (a) mixing by melting a propylene copolymer with a talc to obtain a master batch, and (b) mixing by melting the master batch with the heterophasic propylene copolymer and a peroxide to obtain the composition including a heterophasic polypropylene copolymer, a propylene and talc copolymer, where the amount of peroxide is chosen such that a composition including a heterophasic propylene copolymer, a propylene copolymer and a talc having the desired melt index is obtained.
    [009] It has been discovered that, with the process of the present invention, a heterophasic propylene composition that combines the favorable properties of high rigidity, good impact strength and high fluidity with a reduced amount of peroxide degradation products ready.
    [0010] Furthermore, the process of the invention is an easy and profitable process. In addition, the heterophasic polypropylene composition then prepared can maintain its (mechanical) properties.
    [0011] For the purpose of the present invention, stiffness is determined by measuring the flexural module in accordance with ASTM D790-10.
    [0012] For the purpose of the present invention, the impact force is determined by measuring the Izod impact force at 23 ° C according to ISO 180 4A.
    [0013] For the purpose of the present invention, fluidity is determined by measuring the fluidity rate, also called fluidity index or melting index, according to ISO 1133 (2.16 kg, 230 ° C).
    [0014] Heterophasic propylene copolymers are generally prepared in one or more reactors, by polymerization of propylene in the presence of a catalyst and subsequent polymerization of a propylene-α-olefin mixture. The resulting polymeric materials are heterophasic, but the specific morphology usually depends on the method of preparation and the monomer ratio.
    [0015] The heterophasic propylene copolymers employed in the process according to the present invention can be produced using any conventional technique known to the skilled person, for example, multistage polymerization, such as bulk polymerization, gas phase polymerization , paste polymerization, solution polymerization or any combination thereof. Any catalyst systems, for example, Ziegler-Natta or metallocenes can be used. Such techniques and catalysts are described, for example, in WO06 / 010414; Polypropylene and other Polyolefins, by Ser van der Ven, Studies in Polymer Science 7, Elsevier 1990; WO06 / 010414, US4399054 and US4472524.
    The heterophasic propylene copolymer of the composition of the invention consists of a matrix based on propylene and a dispersed ethylene-α-olefin copolymer. The propylene-based matrix forms the continuous phase in the heterophasic propylene copolymer.
    [0017] The propylene-based matrix consists of a propylene homopolymer and / or a propylene-α-olefin copolymer consisting of at least 70% by weight of propylene and up to 30% by weight of α-olefin, for example, ethylene , for example, consisting of at least 80% by weight of propylene and up to 20% by weight of α-olefin, for example, ethylene, for example, consisting of 90% by weight of propylene and up to 10% by weight of α -olefin, for example, ethylene, based on the total mass of the propylene-based matrix. Preferably, the propylene-based matrix consists of a propylene homopolymer.
    [0018] Preferably, the α-olefin in the propylene-α-olefin copolymer is selected from the group of α-olefins having 2 or 4 to 10 carbon atoms and more preferably the α-olefin is ethylene.
    [0019] The fluidity index (MFI) of the propylene-based matrix (before being mixed in the composition of the invention) can be in the range, for example, 0.3 to 200 dg / min, for example, 0.3 at 80 dg / min measured according to ISO 1133 (2.16 kg, 230 ° C), for example, in the range of 3 to 70, for example, in the range of 10 to 60 dg / min, for example, in the range from 15 to 40 dg / min.
    [0020] The propylene-based matrix is present in an amount of 60 to 95% by weight, for example, 65 to 85% by weight, for example, 70 to 85% by weight, for example, 0 to 80% by weight , for example, 65 to 75% by weight or 75 to 85% by weight, based on the total heterophasic propylene copolymer.
    [0021] The propylene-based matrix is preferably semicrystalline, that is, it is neither 100% amorphous nor 100% crystalline. For example, the propylene-based matrix is at least 40% crystalline, for example, at least 50%, for example, at least 60% crystalline and / or, for example, up to 80% crystalline, for example, up to 70% crystalline . For example, the propylene-based matrix has a crystallinity of 60 to 70%. For the purpose of the invention, the degree of crystallinity of the propylene-based matrix is measured using differential scanning calorimetry according to ISO 11357-1 and ISO 11357-3 1997, using a scan rate of 10 ° C / min, an 5 mg sample and a second heating curve using as a theoretical standard a 100% crystalline material of 207.1 J / g.
    [0022] In addition to the propylene-based matrix, the heterophasic propylene copolymer also consists of a dispersed ethylene-α-olefin copolymer. The dispersed ethylene-α-olefin copolymer is also referred to here as the "dispersed phase". The dispersed phase is embedded in the heterophasic propylene copolymer in a discontinuous form. The particle size of the dispersed phase is typically in the range of 0.5 to 10 microns, as can be determined by transmission electron microscopy (TEM).
    [0023] The MFI of the dispersed ethylene-α-olefin copolymer (before being mixed in the composition of the invention) can be, for example, in the range of 0.001 to 10 dg / min (measured according to ISO 1133 (2.16 kg / 230 ° C)), preferably in the range of 0.006 to 5 dg / min.
    [0024] The dispersed ethylene-α-olefin copolymer is present in an amount of 40 to 5% by weight, for example, in an amount of 35 to 15% by weight based on the total heterophasic propylene copolymer, for example, in an amount of at least 20% by weight and / or, for example, in an amount of up to 30% by weight based on the total heterophasic propylene copolymer.
    [0025] Preferably, the amount of ethylene in the ethylene-α-olefin copolymer is in the range of 20 to 65% by weight, for example, in the range of 40 to 60% by weight based on the ethylene-α-olefin copolymer, for example, the amount of ethylene in the ethylene-α-olefin copolymer is at least 30% by weight and / or, for example, up to 55% by weight based on the ethylene-α-olefin copolymer.
    [0026] In the heterophasic polypropylene in the composition of the present invention, the sum of the total weight of the propylene-based matrix and the total weight of the dispersed ethylene-α-olefin copolymer is 100% by weight.
    [0027] The α-olefin in the ethylene-α-olefin copolymer is preferably chosen from the group of α-olefins having from 3 to 8 carbon atoms and any mixture thereof, preferably the α-olefin in the ethylene-α-olefin copolymer it is chosen from the group of α-olefins having 3 to 4 carbon atoms and any mixture of these, more preferably α-olefin is propylene, in this case, the ethylene-α-olefin copolymer is an ethylene-propylene copolymer. Examples of suitable α-olefins having 3 to 8 carbon atoms, which can be used as ethylene comonomers to form the ethylene-α-olefin copolymer include, but are not limited to, propylene, 1-butene, 1-pentene, 4 -methyl-1-pentene, 1-hexene, 1-heptene and 1-octene.
    [0028] The process of the invention includes the steps of (a) mixing by melting a propylene copolymer with a talc to obtain a master batch, and (b) mixing by melting the master batch with the heterophasic propylene copolymer and a peroxide to obtain the composition including a heterophasic polypropylene copolymer, a propylene and talc copolymer.
    [0029] In the process of the invention, a propylene copolymer is mixed by melting with talc to obtain a master batch. The melt mixing can be carried out by methods known to the person skilled in the art, for example, using an extruder and the conditions as described here for step b).
    The propylene copolymer can be any propylene copolymer, for example, a propylene-α-olefin copolymer, where α-olefin is selected from the group of α-olefins having 2 or 4 to 10 C atoms and where the content of α-olefin is up to 10% by weight based on the propylene copolymer; or the propylene copolymer can be a random propylene-ethylene copolymer, for example, where the ethylene content is up to 10% by weight based on the propylene copolymer, or the propylene copolymer can be a propylene homopolymer, or the propylene copolymer can be a heterophasic propylene copolymer.
    Preferably, the propylene copolymer is a heterophasic propylene copolymer, more preferably the propylene copolymer is the same heterophasic propylene copolymer used in step b) of the process of the invention.
    [0032] Therefore, in a special embodiment, the invention relates to a process according to the invention including the steps of (a) mixing by melting a propylene copolymer with a talc to obtain a master batch, and (b) mixing by melting the master batch with the same heterophasic propylene copolymer (as used in step a)) and a peroxide to obtain the composition including the heterophasic polypropylene copolymer and talc.
    [0033] The weight ratio of talc to propylene copolymer in the master batch is not, at first, critical and can vary across wide ranges.
    [0034] In principle, the talc weight ratio of the propylene copolymer is not critical. Preferably, the weight ratio of talc to propylene copolymer in the master batch is from 1: 9 to 9: 1, more preferably from 1: 3 to 9: 1, for example, from 1: 1 to 9: 1. High ratios by weight of talc to propylene copolymer in the master batch are preferred, as this decreases the volume of the required master batch. A high volume of the master batch is undesirable, as it makes the dosage of the heterophasic propylene copolymer impractical. '
    [0035] Preferably, the weight ratio of the propylene copolymer used in step a), preferably of a heterophasic propylene copolymer to the heterophasic propylene copolymer used in step b), preferably the same heterophasic propylene copolymer (as used in step a)), is from 1: 1 to 1:20, for example, from 1: 5 to 1:20, or from 1: 5 to 1:15, or from 1: 5 to 1:10.
    [0036] The master batch may contain the propylene copolymer and talc only, but may also include additives and / or polar substances appropriate for the surface modification of talc, for example, as described here, for example, ethylene-bis -stearamide.
    [0037] With the melt mix it is intended that the master batch, the heterophasic propylene copolymer and the peroxide are mixed at a temperature that exceeds the melting point of the heterophasic propylene copolymer and the propylene copolymer in the master batch. Fusion mixing can be performed using techniques known to the skilled person, for example, in an extruder. Generally, in the process of the invention, melt mixing is carried out at a temperature in the range of 20 to 300 ° C.
    [0038] For example, the melt mixing of step a) of the process of the invention can be carried out at a temperature in the range of 20 to 300 ° C.
    [0039] For example, the melt mixing of step b) of the process of the invention can be carried out at a temperature in the range of 20 to 330 ° C.
    [0040] Conditions suitable for melt mixing, such as temperature, pressure, shear quantity, screw speed and screw design, when an extruder is used, are known to the skilled person.
    [0041] When an extruder is used, a conventional extruder, such as, for example, a twin screw extruder can be used. The temperature can vary over different areas of the extruder as needed. For example, the temperature can vary from 180 ° C in the feed zone to 300 ° C at the outlet. Preferably, the temperature in the extruder ranges from 200 to 265 ° C; lower temperatures can prevent the reactions between the peroxide and an optional coagent, for example, polyfunctional monomers such as BDDMA and, as a consequence, compositions with the desired fluidity index may not be obtained; very high temperatures can induce processes of unwanted degradation, which can, for example, result in compositions having poor mechanical properties. Similarly, the screw speed of the extruder can be varied as needed. The typical screw speed is in the range of about 100 rpm to about 400 rpm.
    [0042] The residence time in the extruder for the heterotropic propylene copolymer can be less than about 1 minute, for example, between 10 and 40 seconds.
    [0043] Talc is a relatively abundant, inexpensive, highly hydrophobic and generally unattractive mineral. It can be categorized as a hydrated magnesium silicate and its main components can be represented by, inter alia, one or more of the formulas (Si2O5) 2Mg3 (OH) 2, Si8Mg6O20 (OH) 4 or Mg12Si16O40 (OH) 8. Talc suitable for use as additives to a heterophasic propylene copolymer are commercially available from the example Imerys Luzenac. "Talc" and "talcum" are used here interchangeably.
    [0044] Talc is available in various particle sizes, for example, talc particle sizes are classified as "ultrafine" (average particle size less than 1 μm, for example, an average particle size of 0.5 to 0.91 μm) and “fine” (average particle size of at least 1 μm, for example, an average particle size of 1 μm to 5 μm). Preferably, fine or ultrafine powder particles are used in the process of the present invention.
    [0045] Depending on the desired stiffness, the amount of talc used can vary. For practical reasons, the amount of surface-modified talc in the composition of the invention is preferably 0.5 to 5% by weight based on the total amount of propylene copolymer from step a) and the heterophasic polypropylene copolymer from step b). For example, the amount of surface-modified talc in the composition is at least 1% by weight, for example, at least 1.5% by weight and / or, for example, at most 4% by weight, for example up to 3 , 5% by weight, for example, at most 3% by weight based on the propylene copolymer from step a) and the heterophasic propylene copolymer from step b).
    [0046] Preferably, the composition that is prepared for the process of the invention has a melt index in the range of 1 to 200 dg / min as measured according to ISO 1133 (2.16 kg / 230 ° C). For example, the fluidity index is at least 1, for example, at least 5 or, for example, at least 14 dg / min and / or, for example, up to 200 dg / min, for example, up to 80 dg / min or, for example, at least 20 dg / min as measured according to ISO 1133 (2.16 kg / 230 ° C). Preferably, the melt index of the composition that is prepared by the process of the invention is in the range of 5 to 80 dg / min, for example, in the range of 14 to 20 dg / min as measured according to ISO 1133 (2.16 kg / 230 ° C).
    [0047] Examples of suitable peroxides include organic peroxides having a decomposition half-life of less than 1 minute at the average process temperature during mixing by melting the heterophasic propylene copolymer with talc and peroxide. Suitable organic peroxides include, but are not limited to, dialkyl peroxides, for example, dicumyl peroxides, peroxycetals, peroxycarbonates, diacyl peroxides, peroxyesters and peroxydicarbonates. Specific examples of these include benzoyl peroxide, dichlorobenzoyl peroxide, dicumyl peroxide, di-tert-butyl peroxide, 2,5-dimethyl-2,5-di (peroxybenzoate) -3-hexene, 1,4-bis (tert-butylperoxy-isopropyl ) benzene, lauroyl peroxide, tert-butyl peracetate, α, α'-bis (tert-butylperoxy) diisopropylbenzene (Luperco® 802), 2,5-dimethyl-2,5-di (tert-butylperoxy) -3- hexene, 2,5-dimethyl-2,5-di (tert-butylperoxy) -hexane, tert-butyl perbenzoate, tert-butyl perphenylacetate, tert-butyl per-sec-octoate, tert-butyl perpivalate, cumil perpivalate, cumene hydroperoxide , diisopropyl benzene hydroperoxide, 1,3-bis (t-butylperoxy-isopropyl) benzene, dicumyl peroxide, tert-butylperoxy isopropyl carbonate and any combination thereof. Preferably, dialkyl peroxides are employed in the process according to the present invention. More preferably, the peroxide is α, α'-bis (tert-butylperoxy) diisopropylbenzene, 2,5-dimethyl-2,5-di (tert-butylperoxy) -3-hexene or 3,6,9-triethyl- 3,6,9-trimethyl-1,4,7-triperoxonane. Preferably, the peroxide is selected from the group of non-aromatic peroxides.
    [0048] It can be easily determined by the person skilled in the art through routine experimentation how much peroxide should be used to obtain a composition having the desired fluidity index. This also depends on the half-life of the peroxide and the conditions used for the melt mixing which, therefore, depends on the exact composition. Typically, the amount of peroxide used will be found in the range of 0.02 to 0.5% by weight based on the heterophasic propylene copolymer.
    [0049] In the process of the invention or in the composition of the invention, at least part of the talc can be surface modified, this means that mixtures of the surface modified talc with talc without modified surface can also be used. Preferably, at least 80% by weight of the talc used in the process of the invention or present in the composition of the invention has its surface modified, more preferably at least 90% by weight, even more preferably at least 95% by weight, in particular at least 98 % by weight, even more in particular 99% by weight, most particularly any such used in the process of the invention or present in the composition of the invention is surface modified.
    [0050] Other words that are commonly used for surface-modified talc are surface-treated talc and coated talc. Surface treated talc are known to the person skilled in the art and are commonly available from, for example, Imerys Luzenac. Surface-modified talc can be prepared by adding a surface modifier to the talc. The nature and concentration of the modifier depends on the desired benefit in the final talc composite, such as improving the bond between the talcum and the polymer or improving the dispersion of the talc in the polymer. Examples of surface modifiers are silanes, amines, glycols, stearates, sorbates and titanates.
    [0051] Preferably, the surface-modified talc is a talc that has its surface modified with a polar substance selected from the group of glycols, silanes and amines.
    [0052] In a special embodiment, the invention relates to a process of the invention where the surface-modified talc is prepared by mixing a talc with a polar substance, preferably ethylene-bis-stearamide. This can be done externally (that is, before mixing by melting the talc and the propylene copolymer) or the surface-modified talc because it is prepared in situ (that is, by adding the polar substance together with the talc in the mixing step by fusion).
    [0053] Without the desire to be restricted to theory, it is believed that when mixing the talc with a polar substance, the talc can be "coated" in situ.
    [0054] Examples of the polar substances are as described here. Preferably, the talc mixture is made with ethylene-bis-stearamide (also referred to as EBS or EBA).
    [0055] In another aspect, the invention relates to a composition obtained or obtainable by the process of the invention.
    [0056] Specifically, the invention relates to a composition including a heterophasic propylene copolymer, a propylene copolymer and talc where the heterophasic propylene copolymer consists of (a) a propylene based matrix, where the propylene based matrix consists in a propylene homopolymer and / or a propylene-α-olefin copolymer consisting of at least 70% by weight of propylene and up to 30% by weight of α-olefin, for example, ethylene, based on the total mass of the matrix based on propylene, where the propylene-based matrix is present in an amount of about 60 to 95% by weight based on the total heterophasic propylene copolymer and (b) a dispersed ethylene-α-olefin copolymer, where the ethylene-α copolymer -dispersed olefin is present in an amount of 40 to 5% by weight based on the total heterophasic propylene copolymer and where the sum of the total amount of the propylene-based matrix and the total amount of the ethylene-α-olefin copolymer is available immersed in the heterophasic propylene copolymer is 100% by weight, where the composition has a fluidity index in the range of 1 to 200 dg / min as measured according to ISO 1133 (2.16 kg / 230 ° C), and where the amount of volatile organic compounds as measured by the VOC value according to VDA278 (30 min, 180 ° C) and determined by gas chromatography is less than 1500 ppm, based on the total composition.
    [0057] For the purpose of the invention, when reference is made to the standard VDA278, reference is made to the October 2011 version.
    [0058] Preferably, the amount of volatile organic compounds (VOC value) as measured through the VOC value according to VDA 278 (30 min, 180 ° C) and determined by gas chromatography (October 2011 version) is less than 1300 ppm, more preferably less than 1000 ppm, for example, less than 750 ppm, for example less than 600 ppm, for example, less than 500 ppm, for example, less than 400 ppm, for example, less than 300 ppm , based on the total composition.
    [0059] In another embodiment, the invention relates to a composition including a heterophasic propylene copolymer, a propylene and talc copolymer where the heterophasic propylene copolymer consists of (a) a propylene-based matrix, where the propylene-based matrix propylene consists of a propylene homopolymer and / or a propylene-α-olefin copolymer consisting of at least 70% by weight of propylene and up to 30% by weight of α-olefin, for example, ethylene, based on the total mass of the matrix propylene-based matrix, where the propylene-based matrix is present in an amount of about 60 to 95% by weight based on the total heterophasic propylene copolymer and (b) a dispersed ethylene-α-olefin copolymer, where the ethylene copolymer -α-olefin dispersed is present in an amount of 40 to 5% by weight based on the total heterophasic propylene copolymer and where the sum of the total amount of the propylene-based matrix and the total amount of the ethylene-α-olefin copolymer dispersed in the heterophasic propylene copolymer is 100% by weight, where the composition has a fluidity index in the range of 1 to 200 dg / min as measured according to ISO 1133 (2.16 kg / 230 ° C), and where the amount of volatile organic compounds (FOG value) as measured by the FOG value according to VDA278 in the second heating (first heating for 30 min at 90 ° C, and second heating for 1 hour at 120 ° C) is less than 500 ppm, for example, less than 400 ppm, for example less than 350 ppm, for example, less than 300 ppm, for example, less than 250 ppm, for example, less than 200 ppm, for example, less than 150 ppm.
    [0060] In another aspect, the invention relates to a composition including a heterophasic propylene copolymer, a propylene and talc copolymer where the heterophasic propylene copolymer consists of (a) a propylene based matrix, where the propylene based matrix propylene consists of a propylene homopolymer and / or a propylene-α-olefin copolymer consisting of at least 70% by weight of propylene and up to 30% by weight of α-olefin, for example, ethylene, based on the total mass of the matrix propylene-based matrix, where the propylene-based matrix is present in an amount of about 60 to 95% by weight based on the total heterophasic propylene copolymer and (b) a dispersed ethylene-α-olefin copolymer, where the ethylene copolymer -α-dispersed olefin is present in an amount of 40 to 5% by weight based on the total heterophasic propylene copolymer and where the sum of the total amount of the propylene-based matrix and the total amount of the ethylene-α-olefin copolymer dis perso in the heterophasic propylene copolymer is 100% by weight, where the composition has a fluidity index in the range of 1 to 200 dg / min as measured according to ISO 1133 (2.16 kg / 230 ° C), and where the amount of butanol emitted as measured using VDA278 (10 min, 180 ° C) and as determined with gas chromatography - mass spectrometry (GC-MS) is less than 100 ppm, for example, less than 80 ppm, for example, less than 70 ppm, for example, less than 60 ppm, for example, less than 50 ppm, for example, less than 40 ppm, for example, less than 30 ppm.
    [0061] Such a composition having an amount of butanol less than 100 ppm, preferably less than 80 ppm, more preferably less than 60 ppm, more preferably less than 40 ppm, based on the total composition, is especially suitable for use in contact applications foods.
    [0062] Therefore, the invention also relates to a composition including a heterophasic propylene copolymer, a propylene and talc copolymer where the heterophasic propylene copolymer consists of (a) a propylene based matrix, where the propylene based matrix consists of in a propylene homopolymer and / or a propylene-α-olefin copolymer consisting of at least 70% by weight of propylene and up to 30% by weight of α-olefin, for example, ethylene, based on the total mass of the matrix based on propylene, where the propylene-based matrix is present in an amount of about 60 to 95% by weight based on the total heterophasic propylene copolymer and (b) a dispersed ethylene-α-olefin copolymer, where the ethylene-α copolymer -dispersed olefin is present in an amount of 40 to 5% by weight based on the total heterophasic propylene copolymer and where the sum of the total amount of the propylene-based matrix and the total amount of the dispersed ethylene-α-olefin copolymer in the heterophasic propylene copolymer is 100% by weight, where the composition has a fluidity index in the range of 1 to 200 dg / min as measured according to ISO 1133 (2.16 kg / 230 ° C), and where the amount of butanol emitted as measured using VDA278 (10 min, 180 ° C) and as determined with gas chromatography - mass spectrometry (GC-MS) is less than 100 ppm, for example, less than 80 ppm, for example, less than 70 ppm, for example, less than 60 ppm, for example, less than 50 ppm, for example, less than 40 ppm, for example, less than 30 ppm in food contact applications.
    [0063] In another aspect, the invention relates to a composition including a heterophasic propylene copolymer, a propylene and talc copolymer where the heterophasic propylene copolymer consists of (a) a propylene based matrix, where the propylene based matrix propylene consists of a propylene homopolymer and / or a propylene-α-olefin copolymer consisting of at least 70% by weight of propylene and up to 30% by weight of α-olefin, for example, ethylene, based on the total mass of the matrix propylene-based matrix, where the propylene-based matrix is present in an amount of about 60 to 95% by weight based on the total heterophasic propylene copolymer and (b) a dispersed ethylene-α-olefin copolymer, where the ethylene copolymer -α-dispersed olefin is present in an amount of 40 to 5% by weight based on the total heterophasic propylene copolymer and where the sum of the total amount of the propylene-based matrix and the total amount of the ethylene-α-olefin copolymer dis perso in the heterophasic propylene copolymer is 100% by weight, where the composition has a fluidity index in the range of 1 to 200 dg / min as measured according to ISO 1133 (2.16 kg / 230 ° C), and where the amount of acetone emitted as measured using VDA278 (10 min, 180 ° C) and as determined with gas chromatography - mass spectrometry (GC-MS) is less than 4 ppm, for example, less than 3 ppm, for example, less than 2 ppm, for example, less than 1 ppm.
    [0064] In another aspect, the invention relates to a composition including a heterophasic propylene copolymer, a propylene and talc copolymer where the heterophasic propylene copolymer consists of (a) a propylene based matrix, where the propylene based matrix propylene consists of a propylene homopolymer and / or a propylene-α-olefin copolymer consisting of at least 70% by weight of propylene and up to 30% by weight of α-olefin, for example, ethylene, based on the total mass of the matrix propylene-based matrix, where the propylene-based matrix is present in an amount of about 60 to 95% by weight based on the total heterophasic propylene copolymer and (b) a dispersed ethylene-α-olefin copolymer, where the ethylene copolymer -α-dispersed olefin is present in an amount of 40 to 5% by weight based on the total heterophasic propylene copolymer and where the sum of the total amount of the propylene-based matrix and the total amount of the ethylene-α-olefin copolymer dis perso in the heterophasic propylene copolymer is 100% by weight, where the composition has a fluidity index in the range of 1 to 200 dg / min as measured according to ISO 1133 (2.16 kg / 230 ° C), and where the amount of isopropenylacetylbenzene as measured using VDA278 (10 min, 180 ° C) and as determined with gas chromatography - mass spectrometry (GC-MS) is less than 20, for example, less than 15, for example, less than 10 ppm, based on the total composition and / or where the amount of diacetylbenzene as measured using VDA278 (10 min, 180 ° C) and as determined with gas chromatography - mass spectrometry (GC-MS) is less than 90, for example, less than 80, for example, less than 30 ppm, for example, less than 25 ppm.
    [0065] The invention also relates to a composition including a heterophasic propylene copolymer, a propylene and talc copolymer where the heterophasic propylene copolymer consists of (a) a propylene based matrix, where the propylene based matrix consists of a propylene homopolymer and / or a propylene-α-olefin copolymer consisting of at least 70% by weight of propylene and up to 30% by weight of α-olefin, eg ethylene, based on the total mass of the propylene-based matrix, where the propylene-based matrix is present in an amount of about 60 to 95% by weight based on the total heterophasic propylene copolymer and (b) a dispersed ethylene-α-olefin copolymer, where the ethylene-α-olefin copolymer dispersed is present in an amount of 40 to 5% by weight based on the total heterophasic propylene copolymer and where the sum of the total amount of the propylene based matrix and the total amount of the ethylene-α-olefin copolymer dispersed in the co heterophasic propylene polymer is 100% by weight, where the composition has a fluidity index in the range of 1 to 200 dg / min as measured according to ISO 1133 (2.16 kg / 230 ° C), and where the amount of volatile organic compounds as measured by the VOC value according to VDA 278 (30 min, 180 ° C) and determined by gas chromatography is less than 1500 ppm, more preferably less than 1300 ppm, for example, less than 1000 ppm , for example less than 750 ppm, for example, less than 600 ppm, for example, less than 400 ppm, for example, less than 300 ppm, based on the total composition and / or where the amount of volatile organic compounds (FOG value ) as measured by the FOG value according to VDA278 in the second heating (first heating for 30 min at 90 ° C, and the second heating for 1 hour at 120 ° C) is less than 500 ppm, for example, less than 400 ppm , for example less than 350 ppm, for example, less than 300 ppm, for example, less than 250 ppm, for example, less than 200 ppm, for example, less than 150 ppm and / or where the amount of butanol emitted as measured using VDA278 (10 min, 180 ° C) and as determined with gas chromatography - mass spectrometry (GC-MS) is less than 100 ppm, for example, less than 80 ppm, for example, less than 70 ppm, for example, less than 60 ppm, for example, less than 50 ppm, for example, less than 40 ppm, for example, less than 30 ppm and / or where the amount of acetone emitted as measured using VDA278 (10 min, 180 ° C) and as determined with gas chromatography - mass spectrometry (GC-MS) is less than 4 ppm, for example, less than 3 ppm , for example, less than 2 ppm, for example, less than 1 ppm and / or where the amount of isopropenylacetylbenzene as measured using VDA278 (10 min, 180 ° C) and as determined with gas chromatography - mass spectrometry (GC- MS) is less than 20, for example, less than 15, for example, less than 10 ppm, based on the total composition and / or where the amount of diacetylbenzene with the measurement using VDA278 (10 min, 180 ° C) and as determined with gas chromatography - mass spectrometry (GC-MS) is less than 90, for example, less than 80, for example, less than 30 ppm, for example , less than 25 ppm, and preferably where the amount of isopropenylacetylbenzene as measured using VDA278 (10 min, 180 ° C) and as determined with gas chromatography - mass spectrometry (GC-MS) is less than 20, for example, less than 15, for example, less than 10 ppm, based on the total composition and / or where the amount of diacetylbenzene as measured using VDA278 (10 min, 180 ° C) and as determined with gas chromatography - mass spectrometry (GC-MS ) is less than 90, for example, less than 80, for example, less than 30 ppm, for example, less than 25 ppm.
    [0066] More in particular, the invention relates to a composition obtained or obtainable by the process of the invention where the amount of volatile organic compounds as measured by the VOC value according to VDA 278 (30 min, 180 ° C) and determined by gas chromatography is less than 1500 ppm, more preferably less than 1300 ppm, for example, less than 1000 ppm, for example less than 750 ppm, for example, less than 600 ppm, for example, less than 400 ppm, for example, less than 300 ppm, based on the total composition and / or where the amount of volatile organic compounds (FOG value) as measured by the FOG value according to VDA278 in the second heating (first heating of 30 min at 90 ° C , and second heating for 1 hour at 120 ° C) is less than 500 ppm, for example, less than 400 ppm, for example less than 350 ppm, for example, less than 300 ppm, for example, less than 250 ppm, for example example, less than 200 ppm, for example, less than 150 ppm and / or where the amount of buta nol emitted as measured using VDA278 (10 min, 180 ° C) and as determined with gas chromatography - mass spectrometry (GC-MS) is less than 100 ppm, for example, less than 80 ppm, for example, less than 70 ppm, for example, less than 60 ppm, for example, less than 50 ppm, for example, less than 40 ppm, for example, less than 30 ppm and / or where the amount of acetone emitted as measured using VDA278 (10 min, 180 ° C) and as determined with gas chromatography - mass spectrometry (GC-MS) is less than 4 ppm, for example, less than 3 ppm, for example, less than 2 ppm, for example, less than 1 ppm and / or where the amount of isopropenylacetylbenzene as measured using VDA278 (10 min, 180 ° C) and as determined with gas chromatography - mass spectrometry (GC-MS) is less than 20, for example, less than 15, for example, less than 10 ppm, based on the total composition and / or where the amount of diacetylbenzene as measured using VDA278 (10 min, 180 ° C) and as determined with chromatography gas raffia - mass spectrometry (GC-MS) is less than 90, for example, less than 80, for example, less than 30 ppm, for example, less than 25 ppm, and preferably where the amount of isopropenylacetylbenzene as measured using VDA278 (10 min, 180 ° C) and as determined with gas chromatography - mass spectrometry (GC-MS) is less than 20, for example, less than 15, for example, less than 10 ppm, based on the total composition and / or where the amount of diacetylbenzene as measured using VDA278 (10 min, 180 ° C) and as determined with gas chromatography - mass spectrometry (GC-MS) is less than 90, for example, less than 80, for example, less than 30 ppm, for example, less than 25 ppm.
    [0067] For the purpose of the invention, the VOC value, the FOG value, the amount of butanol emitted, the amount of acetone emitted, the amount of isopropenylacetylbenzene and the amount of diacetylbenzene are measured in a sample taken within 1 hour after preparation by fusion mixing and stored in sealed bags for no more than 24 hours at a maximum of 23 ° C.
    [0068] The compositions of the invention may include additional additives.
    [0069] For example, the compositions may contain nucleating agents, clarifiers, stabilizers, release agents, pigments, dyes, plasticizers, antioxidants, antistatic agents, scratch resistance agents, high performance fillers, impact modifiers, flame retardants , blowing agents, recycling additives, binding agents, antimicrobials, anti-fog agents, flow additives, anti-blocking additives, polymer processing aids such as lubricants and the like, etc., surface tension modifiers, co-agents, for example, 1,4-dutanediol dimethacrylate (BDDMA), acrylate or methacrylate; additional components that enhance the interfacial bond between the polymer and the talc, for example, maleate polypropylene, etc. Such additives are well known in the art. The skilled person can quickly select any appropriate combination of additives and amounts of additives without undue experimentation.
    [0070] The amount of additives depends on their type and function. Typically, their amounts will be from 0 to 30% by weight, for example, from 0 to 20% by weight, for example, from 0 to 10% by weight or from 0 to 5% by weight, based on the total composition.
    [0071] The sum of all components added in the process of the invention to form the composition including a heterophasic propylene copolymer and talc must total 100% by weight.
    [0072] Some or all of the components can be pre-mixed with the polypropylene copolymer before mixing by melting the heterophasic polypropylene with the talc or they can be added in step a) of melt mixing. In the event of melt mixing occurring in an extruder, the components can be added in any order by any conventional means, for example, at the same or at different sites in the extruder.
    [0073] In another aspect, the invention relates to the use of compositions of the invention in injection molding, blow molding, extrusion molding, compression molding, thin wall injection molding, etc., for example, in applications contact with food.
    [0074] In yet another aspect, the invention relates to a shaped article including the composition of the invention.
    [0075] The composition of the invention can be transformed into shaped (semi) finished articles using a variety of processing techniques. Examples of appropriate processing techniques include injection molding, compression and injection molding, thin wall injection molding, extrusion, and compression and injection molding. Injection molding is widely used to produce articles such as lids and closures, batteries, buckets, containers, automobile exterior parts, such as bumpers, automobile interior parts such as instrument panels, or parts automotive under the hood. Extrusion is, for example, widely used to produce articles such as rods, sheets, films and tubes. Thin-wall injection molding can, for example, be used to manufacture a thin-walled packaging.
    [0076] The shaped article also has the advantage of having a low VOC value and / or a low FOG value and / or a low amount of acetone and / or a low amount of butanol and / or a low amount of isopropenylacetylbenzene and / or a low amount of diacetylbenzene.
    [0077] Although the invention has been described in detail for the purpose of illustration, it should be understood that such detail is only for that purpose and variations may be made to it by those skilled in the art without departing from the spirit and scope of the invention as defined in claims.
    [0078] It should also be noted that the invention is related to all possible combinations of characteristics described herein, preferably in particular to those combinations of characteristics that are present in the claims.
    [0079] It should also be noted that the term "including" does not exclude the presence of other elements. However, it should also be understood that a description on a product including certain components also discloses a product consisting of those components. Similarly, it should also be understood that a description in a process including certain steps also discloses a process consisting of those steps.
    [0080] The invention is now elucidated by means of the following examples, without, however, being limited to these. EXAMPLES Measuring methods
    [0081] VOC emission was measured according to VDA278 (October 2011 version; 180 ° C, 30 min) in granular compounds.
    [0082] The FOG emission was measured according to VDA278 (first heating at 90 ° C, 30 min, second heating for 1 hour at 120 ° C).
    [0083] The amount of isopropenylacetylbenzene was measured using VDA278 (10 min at 180 ° C) and determined with GC-MS.
    [0084] The amount of diacetylbenzene was measured using VDA278 (10 min at 180 ° C) and determined with GC-MS.
    [0085] For the purpose of the present invention, stiffness is determined by measuring the flexural module in accordance with ASTM D790-10. The flexural modulus was determined in 3.2 mm thick specimens according to ISO 37/2, parallel orientation.
    [0086] For the purpose of the present invention, the impact force is determined by measuring the Izod impact force at 23 ° C, according to ISO 180 4A. Test geometry: 65 * 12.7 * 3.2 mm, 45 ° step according to ISO 37/2, perpendicular orientation.
    [0087] For the purpose of the present invention, fluidity is determined by measuring the fluidity rate, also called fluidity index or melting index, according to ISO 1133 (2.16 kg / 230 ° C). Method
    [0088] Several samples were prepared using a starting material having a fluidity index (MFI) of 1.5. This material is a heterophasic propylene copolymer having a propylene matrix where the propylene based matrix (in this case, a propylene homopolymer) is present in an amount of 75% by weight based on the total heterophasic propylene copolymer and 25% by weight of an ethylene-propylene copolymer consisting of 55% ethylene.
    [0089] The master batch of talcum was prepared by dosing Steamic T1CF talc (uncoated talc) or Steamic T1DF talc (coated talc) (3.4 kg) through a separate feeder in a 1: 1 weight ratio with part of the heterophasic propylene copolymer (3.7 kg) and the Irganox B225 stabilizer (0.5% by weight). Steamic T1CF and Steamic T1DF were provided by Imerys Luzenac. Two master batches of talcum were prepared: one with 0.3% by weight ethylene-bis-stearamide (EBA) and one without ethylene-bis-stearamide.
    [0090] A mixture of calcium stearate processing aid (0.05% by weight), stabilizer Irganox B225 (0.5% by weight), peroxide (Luperco 802PP40, which is di (tert-butylperoxy isopropylbenzene) and the heterophasic propylene copolymer) were mixed before dosing into the extruder funnel.
    [0091] The master batch of talcum was dosed in the extruder through a separate feeder from the mixture.
    [0092] The remaining heterophasic propylene copolymer (3.3 kg) was extruded in a twin screw extruder ZE21 with one of the master batches of talcum or with talc Steamic T1CF and the additive mixture containing the peroxide (Luperco 802PP40, which is di (tert-butylperoxy-isopropylbenzene, obtained from Imerys Luzenac). The amount and composition of the additive mixture were chosen such that the amount of calcium stearate in the final composition was 500 ppm (based on the total composition) and the amount of Irganox B225 was 5000 ppm (based on the total composition). The peroxide concentration in the additive mixture was adjusted to control the flow rate of the finished material to the desired value. The amount of talc in the master batch of talcum was chosen such that the amount of talc in the finished material was 0, 2.5 or 5% by weight, based on the total composition.
    [0093] A typical temperature profile in the extruder is 20-20-40- 100-170-230-240-240-240 ° C, at a productivity of 2.5 kg / h at 300 rpm.
    [0094] The sample compositions differed in the way that the talcum was introduced into the composition (through the master batch or directly into the extruder). For sample number 1, the talcum used was Steamic T1CF (uncoated), introduced through a master batch. For sample 2, the talcum used was Steamic T1CF (uncoated, introduced through a master batch containing 0.3% by weight of EBA. For comparative sample A, the talcum used was Steamic T1CF, which was introduced directly into the extruder. Example 1
    [0095] The concentration of talc in the compositions was varied and the concentration of peroxide in the powder / additive mixture was adjusted to control the flow rate to 18 dg / min.
    [0096] Table 1 shows the amount of peroxide that is needed to obtain the flow rate as determined and described here at 18 dg / min.
    [0097] Table 1. Amount of peroxide concentration required to change the MFI of the heterophasic propylene copolymer from 1.5 to 18 dg / min
    Conclusion 1
    [0098] As can be seen from the results in Table 1, the amount of peroxide that is required to change the MFI of Sabic ® PP PHC27 to 18 dg / min is considerably higher for comparative example A than for compositions of the invention (which adds talc in the form of a master batch of the heterophasic propylene copolymer in the extruder instead of directly to the heterophasic propylene copolymer in the extruder). It can also be seen that, preferably, the talc is coated in situ, that is, preferably EBA is mixed with the talc in the master batch, prior to the extrusion of the master batch with the heterophasic propylene copolymer. Example 2. Determination of the amount of peroxide decomposition products
    [0099] The amount of peroxide decomposition products (diacetylbenzene and isopropenylacetylbenzene) of the compositions of examples 1, 2 and comparative example A and comparative example B (without talc) was determined in the final composition using the method described above. The concentrations of tert-butanol, acetone and methane were calculated. The results are shown in Table 2 below.
    [00100] Table 2. Quantity of peroxide degradation products
    Conclusion 2
    [00101] As can be seen from Table 2, the amount of peroxide degradation products in the compositions of the invention (prepared using a master batch) is considerably less than in the composition of comparative example A. Furthermore, the coating in situ of talc in the master batch by mixing in EBA further reduces the amount of peroxide degradation products in the compositions of the invention. This is advantageous for organoleptic performance, lower emission levels and minor safety problems. Example 3. Determination of mechanical properties
    [00102] The Izod impact at 23 ° C and the module II at 23 ° C were also measured. The results are shown in Table 3.
    [00103] Table 3. Izod impact and flexural modulus of the Sabic ® PP PHC27 heterophasic propylene copolymer having an MFI of 18 dg / min, using different talc.
    M = master batch M + E = master batch with 0.3% by weight of EBA D = talc added directly to the extruder without being present in the Imp master batch. = Izod impact at 23 ° C (kJ / m2) Mod. = Flexural module II at 23 ° C (MPa) Conclusion 3
    [00104] As can be seen from Table 3, although different talc are used and the amount of peroxides used is less than for samples 1-3 than for comparative sample A, the Izod impact and the flexural module remained the same.
    [00105] This shows that the mechanical properties of the composition of the invention, even containing a smaller amount of peroxide decomposition products, remain comparable to those of the composition containing considerably greater amounts of peroxide decomposition products.
    权利要求:
    Claims (12)
    [0001]
    1. Process for the preparation of a composition comprising a heterophasic propylene copolymer, a propylene and talc copolymer, characterized by the fact that the heterophasic propylene copolymer consists of (a) a propylene based matrix, wherein the propylene based matrix propylene consists of a propylene homopolymer and / or a propylene-α-olefin copolymer consisting of at least 70% by weight of propylene and up to 30% by weight of α-olefin, based on the total mass of the propylene-based matrix, in that the propylene-based matrix is present in an amount of 60 to 95% by weight based on the total heterophasic propylene copolymer and (b) a dispersed ethylene-α-olefin copolymer, wherein the amount of ethylene in the ethylene-copolymer α-olefin is in the range of 20 to 65% by weight, where α-olefin in the ethylene-α-olefin copolymer is chosen from the group of α-olefins having 3 to 8 carbon atoms and any mixtures thereof, where the ethylene-α-o copolymer dispersed lefine is present in an amount of 40 to 5% by weight based on the total heterophasic propylene copolymer and where the sum of the total amount of the propylene-based matrix and the total amount of the ethylene-α-olefin copolymer dispersed in the propylene copolymer heterophasic is 100% by weight, where the composition has a fluidity index in the range of 1 to 200 dg / min as measured according to ISO 1133 (2.16 kg / 230 ° C) comprising the steps of (c) mixing by melting a propylene copolymer with a talc to obtain a master batch, and (d) mixing by melting the master batch with the heterophasic propylene copolymer and a peroxide to obtain the composition comprising a heterophasic polypropylene copolymer. , a propylene and talc copolymer, where the amount of peroxide is chosen such that a composition comprising a heterophasic propylene copolymer, a propylene copolymer and a talc having the desired melt index is obtained, and is in a range of 0.02 to 0.5% by weight based on the heterophasic propylene copolymer, where at least part of the talc in the composition is surface-modified and where the amount of talc in the composition is 0.5 to 5% by weight based on the total amount of the propylene copolymer from step a) and the heterophasic propylene copolymer from step b).
    [0002]
    2. Process according to claim 1, characterized by the fact that the propylene-based matrix consists of a propylene homopolymer.
    [0003]
    Process according to claim 1 or 2, characterized in that the α-olefin in the ethylene-α-olefin copolymer is propylene.
    [0004]
    Process according to any one of claims 1 to 3, characterized in that it comprises the steps of (a) mixing by melting a propylene copolymer with a talc to obtain a master batch, and (b) mixing by melting the master batch with the same heterophasic propylene copolymer and a peroxide to obtain the composition including a heterophasic polypropylene copolymer, a propylene and talc copolymer.
    [0005]
    Process according to any one of claims 1 to 4, characterized in that the peroxide is α, α'-bis (tert-butylperoxy) diisopropylbenzene, 2,5-dimethyl-2,5-di (tert -butylperoxy) -3-hexene or 3,6,9-triethyl-3,6,9-trimethyl-1,4,7-triperoxonane.
    [0006]
    Process according to any one of claims 1 to 5, characterized in that the weight ratio of talc to propylene copolymer in the master batch is 1: 9 to 9: 1.
    [0007]
    Process according to any one of claims 1 to 6, characterized in that the talc has its surface modified, preferably where the talc has its surface modified with a polar substance selected from the group of glycols, silanes and amines.
    [0008]
    Process according to claim 6 or 7, characterized in that the surface-modified talc is prepared by mixing a talc with a polar substance, preferably ethylene-bis-stearamide.
    [0009]
    9. Composition, characterized by the fact that it comprises a heterophasic propylene copolymer, a propylene and talc copolymer, in which the heterophasic propylene copolymer consists of (a) a propylene-based matrix, where the propylene-based matrix consists of a propylene homopolymer and / or a propylene-α-olefin copolymer consisting of at least 70% by weight of propylene and up to 30% by weight of α-olefin, based on the total mass of the propylene-based matrix, where the matrix propylene-based is present in an amount of 60 to 95% by weight based on the total heterophasic propylene copolymer, and (b) a dispersed ethylene-α-olefin copolymer, in which the amount of ethylene in the ethylene-α- copolymer olefin is in the range of 20 to 65% by weight, where the α-olefin in the ethylene-α-olefin copolymer is chosen from the group of α-olefins having 3 to 8 carbon atoms and any mixtures thereof, in which the copolymer ethylene-α-olefin dispersion is present present in an amount of 40 to 5% by weight based on the total heterophasic propylene copolymer and where the sum of the total amount of the propylene based matrix and the total amount of the ethylene-α-olefin copolymer dispersed in the heterophasic propylene copolymer is 100% by weight, where the composition has a fluidity index in the range of 1 to 200 dg / min as measured according to ISO 1133 (2.16 kg / 230 ° C), and in which the amount of volatile organic compounds as measured by the VOC value according to VDA 278 (30 min, 180 ° C) and determined by gas chromatography is less than 1500 ppm, more preferably less than 1300 ppm, for example less than 1000 ppm, for example less than 750 ppm, for example, less than 600 ppm, for example, less than 400 ppm, for example, less than 300 ppm, based on the total composition and / or where the amount of butanol emitted as measured using VDA278 (10 min, 180 ° C) and as determined with gas chromatography - mass spectrometry (GC-MS) is less than 100 ppm, for example, less than 80 ppm, for example, less than 70 ppm, for example, less than 60 ppm, for example, less than 50 ppm, for example, less than 40 ppm, for example, less than 30 ppm and / or where the amount of acetone emitted as measured using VDA278 (10 min, 180 ° C) and as determined with gas chromatography - mass spectrometry (GC-MS) is less than 4 ppm, for example, less than 3 ppm, for example, less than 2 ppm, for example, less than 1 ppm and / or where the amount of isopropenylacetylbenzene as measured using VDA278 (10 min, 180 ° C) and as determined with gas chromatography - spectrometry of mass (GC-MS) is less than 20, for example, less than 15, for example, less than 10 ppm, based on the total composition and / or where the amount of diacetylbenzene as measured using VDA278 (10 min, 180 ° C ) and as determined with gas chromatography - mass spectrometry (GC-MS) is less than 90, for example, less than 80, for example, less than 30 ppm, eg multiple, less than 25 ppm, where at least part of the talc in the composition is surface-modified and where the amount of talc in the composition is 0.5 to 5% by weight based on the total amount of the propylene copolymer from step a ) and in the heterophasic propylene copolymer of step b).
    [0010]
    10. Composition according to claim 9, characterized by the fact that it also comprises additives.
    [0011]
    11. Use of a composition, as defined in claim 9 or 10, characterized by the fact that it is injection molding, blow molding, extrusion molding, compression molding or thin wall injection molding in food contact applications.
    [0012]
    12. Conformed article, characterized by the fact that it comprises a composition, as defined in claim 9 or 10.
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    法律状态:
    2019-12-03| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|
    2020-08-11| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application according art. 36 industrial patent law|
    2021-01-05| B09A| Decision: intention to grant|
    2021-02-23| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 17/09/2013, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    EP12006583.4|2012-09-19|
    EP12006582.6A|EP2711391A1|2012-09-19|2012-09-19|Process for the preperation of a composition comprising heterophasic propylene copolymer and talc|
    EP12006583.4A|EP2711392A1|2012-09-19|2012-09-19|Process for the preparation of a composition comprising heterophasic propylene copolymer and talc|
    EP12006582.6|2012-09-19|
    PCT/EP2013/069295|WO2014044682A1|2012-09-19|2013-09-17|Process for the preparation of a composition comprising heterophasic propylene copolymer and talc|
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