• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Solid surface with thermo-photochromic properties. The present invention relates to a solid surface with thermo-photochromic properties which has a combination of a polymeric matrix, mineral filler, coloring agent and a polymerization initiating agent, which allows to solve manufacturing limitations, the initial coloration can be selected at the taste and do not require expensive micro encapsulations. The solid surface can also contain organic or inorganic pigments to accentuate the color of the surface. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2702971A1
    申请号:ES201831111
    申请日:2018-11-16
    公开日:2019-03-06
    发明作者:Martínez Antonio Latorre；Font Vicente Serrano；Ramón Ramiro Llop
    申请人:SYSTEM POOL SA；
    IPC主号:
    专利说明:

    [0001]
    [0002] FIELD OF THE INVENTION
    [0003]
    [0004] The present invention pertains to the technical field of solid surfaces or " Solid Surface" , more specifically to a solid surface that exhibits a color change when applied to a source of light or heat.
    [0005]
    [0006] BACKGROUND OF THE INVENTION
    [0007]
    [0008] The chromoactive materials respond with a change of color before an external stimulus. The phenomenon of color change is classified and named based on the stimulus that causes the change. Thus, photochromism is a change of color, normally colorless to color, caused by UV light, electrochromism is a reversible color change through oxidation or reduction produced by a current or electric potential and thermochromism is a change of color caused by heat. These are the most common phenomena within the chromoactive materials, however, there are many others that attend to different stimuli and that have been evolving in recent years, although they are not yet at the same level of development.
    [0009]
    [0010] Photochromic or photochromic materials are materials that influence sunlight or light with a high UV component on them, reversibly changing their color (these materials are not seen in the dark).
    [0011]
    [0012] On the other hand, thermochromic materials are materials that change color with temperature. They allow to select the color and the range of temperatures, which allow a very wide range of applications. In addition, they can be reversible or change color permanently with the increase in temperature depending on the pigment that is incorporated. Normally they are materials of semiconductor nature.
    [0013] There are examples in the state of the art of materials with these properties of color change that vary depending on light (photochromic) and temperature (thermochromic). An example is patent ES2645297B1, which describes a film of polymer material with thermo-photochromic properties for color regulation of glazed surfaces and plastic materials. The invention relates to a film of polymeric material with thermo-photochromic properties comprising micrometric and / or nanometer-sized capsules embedded and deposited homogeneously dispersed in their structure, said capsules being formed by a solid wall of a polymer other than polymer of the film containing therein a dispersion of at least one T-type photochromic compound which is selected from the group consisting of spiropyrans, spiroxazines, chromenes and any combination thereof, in a liquid material of phase change of type non-volatile acid that interacts with the photochrome as a function of temperature.
    [0014]
    [0015] This film can be used as a surface coating material to which it is desired to confer the photochromic properties of color change, such as shales, device screens, advertising surfaces, vehicles and glass or plastic surfaces in general. However, this system has a complex and expensive operation due to the encapsulations with the T-type chromophores. In addition, they have limitations that can not be obtained all the range of desirable colorations and the change of color always implies a transparent beginning or end.
    [0016]
    [0017] GB2431159A describes a composition comprising a microencapsulated thermochromic and / or photochromic material dispersed in a crosslinked polymer matrix. The polymer matrix may comprise acrylic and / or polyvinyl polymers and the thermochromic material may comprise a liquid crystal. The composition contains 10-50% by volume of the polymer, 1-20% by volume of the microencapsulated material and 35-90% by volume of water based on the total composition. Unfortunately, this water base limits the use of many polymers and pigments and the change of color always implies a transparent beginning or end
    [0018] DESCRIPTION OF THE INVENTION
    [0019]
    [0020] The present invention relates to a solid surface with thermo-photochromic properties that has advantages in its composition and properties compared to the formulations described in the state of the art.
    [0021]
    [0022] The present invention describes the use of a combination of coloring agents compatible with organic polymer systems, saving the limitation of the aqueous phase, where the initial coloration can be selected to taste and inexpensive micro encapsulations are not required.
    [0023]
    [0024] When the solid surface of the present invention is subjected to the action of radiation (solar or different types of UV) or heat, the initial color changes to another color. When you stop applying this source of radiation or heat, the surface recovers the initial coloration. Therefore, the change of color does not imply a transparent beginning or end, as it happens in the state of the art.
    [0025]
    [0026] In a first aspect of the invention, the solid surface with thermo-photochromic properties is composed of 30-40% by weight of a polymeric matrix, 60-70% by weight of mineral filler, 0.2-5% by weight of coloring agent with respect to the total weight, and 0.5-1% by weight of polymerization initiating agent. All these weights are expressed with respect to the total weight.
    [0027]
    [0028] In another aspect of the invention, the polymer matrix is a polymer selected from the group comprising polyvinyl alcohol (PVA), polyvinylpyrrolidone (PVP), ethylcellulose, methyl methacrylate monomer (MMA), polymethyl methacrylate (PMMA), polystyrene, acrylic, styrenic, polyurethane, polyurea and polyamide. Preferably, the polymer matrix is polymethylmethacrylate (PMMA).
    [0029]
    [0030] In another aspect of the invention, the mineral filler is selected from the group comprising alumina trihydrate (ATH), quartz, oxalates and carbonates, or mixtures thereof. Preferably, the mineral filler is alumina trihydrate (ATH).
    [0031] In another aspect of the invention, the coloring agent is selected from the group comprising rutile TiO 2 , ZnS, SnO 2 , ZnO, SnO 2 , CdS, Fe 2 O 3 , Cu 2 O, WO 3 and TiO 2 anatase, or their mixtures. Preferably, the coloring agent is ZnS or TiO 2 anatase.
    [0032]
    [0033] These coloring agents are generally used as pigments, but for such use it is necessary that the transition metals (such as Zn, Ti, Cd, Sn, Cu, W, among others) are in stable crystalline structures or that they present coatings and / or stabilizers. However, the opposite is required in the present invention.
    [0034]
    [0035] In the present invention, metals that have a certain structural instability or crystalline defects are used, which generate a color change with the effect of radiation or heat. With this, oxygen vacancies are easily generated in the crystalline structure that provide a change in shade.
    [0036]
    [0037] In another aspect of the invention, the polymerization initiator is tert-butylperoxide maleate (TBPM), tert-butyl hydroperoxide or benzoyl peroxide.
    [0038]
    [0039] In a last aspect of the invention, the solid surface may additionally contain in its composition an organic or inorganic pigment.
    [0040]
    [0041] BRIEF DESCRIPTION OF THE FIGURES
    [0042]
    [0043] Figure 1. Shows different solid surfaces with thermo-photochromic properties of the present invention. To the left of each solid surface the main coloration is observed and to the right the coloration obtained after applying radiation or heat.
    [0044]
    [0045] DESCRIPTION OF MODES OF REALIZATION
    [0046]
    [0047] Having described the present invention, it is further illustrated by the following examples.
    [0048] Thermo-photochromic properties of the present invention and results obtained 7 realizations of the solid surface with thermo-photochromic properties of the present invention were carried out. In general, a coloring agent was added to a mixture of inorganic / organic pigment. This mixture was stirred and subsequently added to the inorganic filler and the polymer, homogenizing. Subsequently, the polymerization agent was added and the solid surface was obtained. This procedure was carried out for the solid surfaces C, D, E, F and G.
    [0049]
    [0050] In the case of the solid surfaces A and B no inorganic / organic pigment was used, therefore, the coloring agent was added directly on the inorganic filler and the polymer, being homogenized. Subsequently, the polymerization agent was added and the solid surface was obtained.
    [0051]
    [0052] The compositions used are described in more detail in Table 1.
    [0053]
    [0054] Table 1. Solid surface realizations
    [0055]
    [0056]
    [0057]
    [0058]
    [0059]
    [0060] These solid surfaces are subjected to the action of radiation (solar or different types of UV) or heat, changing their initial coloration to another final coloration. When you stop applying this source of radiation or heat, the surface recovers the initial coloration.
    [0061]
    [0062] To evaluate the color variation of the solid surface, a color space has been used. This color space is a standardized method that allows you to express the color of an object using a type of annotation, such as numbers.
    [0063]
    [0064] Specifically, the color space L * a * b *, also referred to as CIELAB, has been used, being currently one of the most popular and uniform color spaces used to evaluate the color of an object.
    [0065] This color space is widely used because it correlates numerical color values consistently with human visual perception. Researchers and manufacturers use it to evaluate color attributes, identify inconsistencies, and precisely express their results to others in numerical terms.
    [0066]
    [0067] The color space L * a * b * was modeled based on an opposing color theory that states that two colors can not be red and green at the same time or yellow and blue at the same time. As shown below, L * indicates the brightness and a * and b * are the chromatic coordinates.
    [0068]
    [0069] - L * = luminosity
    [0070]
    [0071] - a * = red / green coordinates (+ a indicates red, -a indicates green)
    [0072]
    [0073] - b * = coordinates yellow / blue (+ b indicates yellow, -b indicates blue)
    [0074]
    [0075] The Ci64 portable X-Rite spectrophotometer was used to quantify these color attributes easily. This type of instrument allows you to determine the color of an object within the color space and show the values for each coordinate L *, a *, and b *.
    [0076]
    [0077] Table 2 collects the information obtained from the initial and final color space values for various embodiments of the solid surface of the present invention. The subscripts of L, a, and b represent the initial value as L 0 , a 0 , and b 0 and the final value as L f , a f , and b f . These color changes can also be appreciated in Figure 1.
    [0078]
    [0079] Table 2. Initial and final color space values for various embodiments of the solid surface of the present invention.
    [0080]
    [0081]
    [0082]
    [0083]
    [0084] In conclusion, a formulation of a solid surface with thermo-photochromic properties compatible with the production system and low cost. This formulation allows to apply on any basic color using pigment pastes and producing a very visible color change.
    权利要求:
    Claims (9)
    [1]
    1. A solid surface with thermochromic properties characterized in that it comprises:
    - 30-40% by weight of a polymer matrix with respect to the total weight, - 60-70% by weight of mineral filler with respect to the total weight,
    - 0.2-5% by weight of coloring agent with respect to the total weight, and - 0.5-1% by weight of polymerization initiating agent with respect to the total weight.
    [2]
    2. The solid surface according to claim 1, wherein the polymer matrix is a polymer selected from the group comprising polyvinyl alcohol (PVA), polyvinylpyrrolidone (PVP), ethylcellulose, methyl methacrylate monomer (MMA), polymethyl methacrylate (PMMA) ), polystyrene, acrylic, styrenic, polyurethane, polyurea and polyamide.
    [3]
    3. The solid surface according to claim 2, wherein the polymer matrix is polymethylmethacrylate (PMMA).
    [4]
    4. The solid surface according to claims 1 to 3, wherein the mineral filler is selected from the group comprising alumina trihydrate (ATH), quartz, oxalates and carbonates, or mixtures thereof.
    [5]
    5. The solid surface according to claim 4, wherein the mineral filler is alumina trihydrate (ATH).
    [6]
    The solid surface according to claims 1 to 5, wherein the coloring agent is selected from the group comprising rutile TiO 2 , ZnS, SnO 2 , ZnO, CdS, Fe 2 O 3 , Cu 2 O, WO 3 and TiO 2 anatase, or its mixtures.
    [7]
    7. The solid surface according to claim 6, wherein the coloring agent is ZnS or TiO 2 anatase.
    [8]
    8. The solid surface according to claims 1 to 7, wherein the polymerization initiating agent is tert-butylperoxide maleate, tert-butyl hydroperoxide or benzoyl peroxide.
    [9]
    9. The solid surface according to claims 1 to 8, characterized in that it also comprises an organic or inorganic pigment.
    类似技术:
    公开号 | 公开日 | 专利标题
    CN103180132B|2016-02-10|The color of up-conversion and lower transition material is utilized to strengthen
    CN105259704B|2018-12-14|A kind of quantum dot film and backlight module
    TW201222121A|2012-06-01|Multi-color electro-optic displays
    US9937434B2|2018-04-10|Photochromic toy
    KR20100091140A|2010-08-18|Display method and device using photonic crystal characteristics
    EP1948727A2|2008-07-30|Device for illuminating using blue, green, yellow, or red light emitting diodes
    CN106147452A|2016-11-23|A kind of reflection and heat insulation colour acrylic acid superlastic water-repellent paint
    ES2702971B2|2020-06-02|SOLID SURFACE WITH THERMO-PHOTOCHROMIC PROPERTIES
    JP6012323B2|2016-10-25|Decorative material
    PT1272577E|2010-04-28|Solid marking composition as writing means, a writing instrument, an optically variable marking layer and use of a plurality of optically variable pigments
    KR20160130961A|2016-11-15|Automatic color changing paint for saving energy and coating layer using thereof
    KR20010007264A|2001-01-26|Composition for coating transparent surfaces
    CN106715126A|2017-05-24|Dye microenvironment
    JP2733685B2|1998-03-30|Electrophoretic display device and dispersion system for display
    CN104130633A|2014-11-05|Waterborne interior wall coating with reversible photochromic function
    KR101674559B1|2016-11-09|Automatic color changing paint for saving energy and coating layer using thereof
    US6713431B2|2004-03-30|Metallic luster tone thermochromic laminate member
    JP6472682B2|2019-02-20|Photochromic toy set
    CN2372676Y|2000-04-05|Ultraviolet radiation intensity indicator
    JPH11198598A|1999-07-27|Bright thermally discoloring decorative body
    WO2017191346A1|2017-11-09|Film made of a polymeric material having thermo-photochromic properties for controlling the colour of glazed surfaces and plastic materials
    JP6615043B2|2019-12-04|Photochromic toy set
    KR20220012566A|2022-02-04|Composition for discolored cosmetic container dropper
    Tarhan2019|An Artist's Guide to Reversibly Color Changing Paints and Pigments
    JP2008207510A|2008-09-11|Brilliant thermal-discoloring laminate
    同族专利:
    公开号 | 公开日
    ES2702971B2|2020-06-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3329648A|1962-11-21|1967-07-04|American Cyanamid Co|Compositions of matter composed of vinyl polymers and inorganic photochromic oxides|
    US4134853A|1976-12-30|1979-01-16|Robert Ehrlich|Photochromic composition|
    US20020076549A1|1999-07-02|2002-06-20|Welch Cletus N.|Poly acrylic photochromic coating|
    MX2007005300A|2007-05-03|2008-11-04|Ct De Investigacion Y Desarrol|Photochromic composite based on titania sol/acrylic resin having thermochromic and anticorrosive additional properties.|
    KR20090073891A|2007-12-31|2009-07-03|주식회사 라이온켐텍|Artificial marble|
    CN104177803A|2014-08-19|2014-12-03|珠海天威飞马打印耗材有限公司|Color three-dimensional printing molding material and preparation method thereof|
    法律状态:
    2019-03-06| BA2A| Patent application published|Ref document number: 2702971 Country of ref document: ES Kind code of ref document: A1 Effective date: 20190306 |
    2020-06-02| FG2A| Definitive protection|Ref document number: 2702971 Country of ref document: ES Kind code of ref document: B2 Effective date: 20200602 |
    优先权:
    申请号 | 申请日 | 专利标题
    ES201831111A|ES2702971B2|2018-11-16|2018-11-16|SOLID SURFACE WITH THERMO-PHOTOCHROMIC PROPERTIES|ES201831111A| ES2702971B2|2018-11-16|2018-11-16|SOLID SURFACE WITH THERMO-PHOTOCHROMIC PROPERTIES|
    [返回顶部]