Optical coating material for shoes

Abstract

The present invention discloses an optical coating material for shoes, comprising the following components by weight: 10-80 parts by weight of silicone resin, 1-10 parts by weight of SiO2 / TiO2 composite particles, 0.01-5 parts by weight of microcapsules, 0.1-1 parts by weight of refractive index regulators, and 0-5 parts by weight of auxiliary agents. The optical coating material for shoes used in the present invention can ensure that the appearance of the upper does not turn yellow or peel off during long-term use in harsh environments, and maintains the appearance effect of thermochromic changes.

Description

Technical Field

[0001] The invention relates to the technical field of optical coatings, in particular to the technical field of optical coating materials for shoes. Background Art

[0002] Ordinary coating usually refers to coating a thin film with specific functions on the surface of various materials, such as a metal film for decorative effects or an insulating film for protection. The main purpose of these coatings is to improve the appearance, durability or other non-optical properties of the material. Optical coating refers specifically to a thin film used on optical components. Its main purpose is to change or control the optical properties of light such as transmission, reflection, absorption, polarization, etc., in order to optimize the performance of the optical system.

[0003] Optical coating involves a deep understanding of optical principles and precise process control. Optical coating theory is based on the interference and refraction of light waves. By adjusting the thickness and refractive index difference of the film layer, the incident light wave can be precisely manipulated. This process needs to take into account the behavior of light when it propagates in different media, as described by Snell's law of refraction, and the response of light waves under different polarization states. With the development of technology, modern optical coating technology has developed from early evaporation deposition technology to high-precision processes including intermittent direct light control, ion beam sputtering and magnetron sputtering.

[0004] The production process of optical coating does not produce any harmful gases or industrial wastewater, the equipment is environmentally friendly, the unit price is lower, and the production capacity is higher. In addition, optical coating has the following advantages:

[0005] Enhance optical performance: For example, anti-reflection film can significantly reduce the reflection loss of optical components and improve transmission efficiency; high-reflection film can increase the reflectivity of light and manufacture high-performance mirrors, laser cavities and other equipment.

[0006] Selective spectral filtering: For example, specially designed filters can allow only certain wavelengths of light to pass through while blocking other wavelengths of light, which is crucial for many scientific and industrial applications.

[0007] Adapt to different application scenarios: According to different optical requirements, optical coating can achieve anti-reflection, color separation, polarization and other functions by selecting different materials and designing different film structures.

[0008] Improving the performance of optoelectronic devices: The application of transparent conductive films enables optoelectronic devices (such as LEDs and thin-film solar cells) to have both high transparency and good conductivity.

[0009] As people's quality of life improves, the demand for personalized daily necessities is getting higher and higher. Young people are increasingly fond of products that can show their individuality. For example, in addition to basic practical functions, people have a very high demand for personalized appearance and color of shoes. When new shoes of certain brands are launched, they are often popular among young people because of their unique appearance. Therefore, the applicant of the present invention has pioneered the development of an optical coating for shoes, which can not only present different appearance colors when the temperature changes, but also meet the stringent requirements of weather resistance and adhesion. Summary of the invention

[0010] The invention provides an optical coating material for shoes, which can ensure that the appearance of the shoe upper does not turn yellow or peel off during long-term use in harsh environments, and maintains a thermochromic appearance effect.

[0011] An optical coating material for shoes, characterized in that it comprises the following ingredients in parts by weight: 10-80 parts by weight of organic silicone resin, 1-10 parts by weight of SiO2 / TiO2 composite particles, 0.01-5 parts by weight of microcapsules, 0.1-1 parts by weight of a refractive index regulator, and 0-5 parts by weight of an auxiliary agent.

[0012] As a preferred embodiment, the SiO2 / TiO2 composite particles are SiO2 / TiO2 composite particles with a core-shell structure.

[0013] As a preferred embodiment, the SiO2 / TiO2 composite particles have a core layer of SiO2 and a shell layer of TiO2.

[0014] As a preferred embodiment, the microcapsule is composed of a wall material and a core material, wherein the core material includes a thermochromic pigment and the wall material is a silicone resin.

[0015] As a preferred embodiment, the refractive index adjuster includes a high refractive index material and / or a low refractive index material.

[0016] As a preferred embodiment, the high refractive index material is selected from any one of Si3N4, Ti3O5, and NB2O5, and the low refractive index layer is a material composed of SiO2 or Al2O3.

[0017] A method for preparing an optical coating material for shoes, characterized in that: after cleaning the upper material, the upper material is placed in a vacuum coating device, the optical coating for shoes is evaporated on the upper material, and the upper material is taken out, and the optical coating for shoes is formed on its surface.

[0018] As a preferred embodiment, the vacuum degree of the vacuum coating equipment is evacuated to 1×10-3Pa to 5×10-3Pa.

[0019] As a preferred embodiment, the film thickness of the shoe optical coating is 200-500nm.

[0020] As a preferred embodiment, the upper material includes EVA, nylon, TPU, leather, mesh and the like.

[0021] As a preferred embodiment, the additives include scratch resistance agents, adhesion promoters, viscosity regulators, and the like.

[0022] Compared with the prior art, the present invention has the beneficial effect that the optical coating for shoes of the present invention can ensure that the appearance of the shoe upper does not turn yellow or peel off during long-term use in harsh environments, and maintains a thermochromic appearance effect. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with embodiments. Additional aspects and advantages of the present invention will be given in part in the following description, and part will become apparent from the following description, or will be understood through the practice of the present invention. It should be understood that the following description is only used to explain the present invention and is not intended to limit the present invention.

[0024] As used herein, the terms "comprises," "including," "having," "containing," or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises the listed elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

[0025] The conjunction "consisting of excludes any unspecified element, step, or component. If used in a claim, this phrase renders the claim closed-ended so that it does not include materials other than those described, except for conventional impurities associated therewith. When the phrase "consisting of" appears in a clause of the body of a claim rather than immediately following the subject matter, it limits only the elements described in that clause; other elements are not excluded from the claim as a whole.

[0026] When amount, concentration or other value or parameter is expressed as range, preferred range or a series of upper preferred value and lower preferred value limit range, this should be understood as specifically disclosing all ranges formed by any pairing of any range upper limit or preferred value and any range lower limit or preferred value, regardless of whether the range is disclosed separately. For example, when disclosing range "1 to 5", described range should be interpreted as including range "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", "1 to 3 and 5" etc. When numerical range is described in this article, unless otherwise stated, the range is intended to include its end value and all integers and fractions within the range.

[0027] Singular forms include plural references unless the context clearly indicates otherwise. "Optional" or "either" means that the subsequently described event or incident may or may not occur, and that the description includes instances where the event occurs and instances where it does not.

[0028] Approximate terms in the specification and claims are used to modify quantities, indicating that the present invention is not limited to the specific quantity, but also includes acceptable and modified parts close to the quantity without causing changes in the relevant basic functions. Accordingly, the use of "about", "approximately", etc. to modify a numerical value means that the present invention is not limited to the exact numerical value. In some examples, the approximate terms may correspond to the accuracy of the instrument for measuring the numerical value. In the specification and claims of this application, range limitations can be combined and / or interchanged, and if not otherwise stated, these ranges include all subranges contained therein.

[0029] The indefinite articles "a" and "an" before the elements or components of the present invention have no limitation on the quantity requirements (i.e. the number of occurrences) of the elements or components. Therefore, "a" or "an" should be interpreted as including one or at least one, and the elements or components in the singular form also include the plural form, unless the quantity obviously refers to the singular form only.

[0030] In addition, the descriptions of the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" described below mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the technical features involved in the various embodiments of the present invention can be combined with each other as long as they do not conflict with each other.

[0031] The following examples are implemented based on the technical solutions of the invention, and provide detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to the following examples.

[0032] The invention provides an optical coating material for shoes, comprising the following components in parts by weight: 10-80 parts by weight of organic silicone resin, 1-10 parts by weight of SiO2 / TiO2 composite particles, 0.01-5 parts by weight of microcapsules, 0.1-1 parts by weight of a refractive index regulator, and 0-5 parts by weight of an auxiliary agent.

[0033] The SiO2 / TiO2 composite particles are SiO2 / TiO2 composite particles with a core-shell structure.

[0034] The SiO2 / TiO2 composite particles have a core layer of SiO2 and a shell layer of TiO2.

[0035] The microcapsule is composed of a wall material and a core material, wherein the core material includes a thermochromic pigment and the wall material is an organic silicone resin.

[0036] The refractive index adjusting agent includes a high refractive index material and / or a low refractive index material.

[0037] The high refractive index material is selected from any one of Si3N4, Ti3O5, and NB2O5, and the low refractive index layer is a material composed of SiO2 or Al2O3.

[0038] The present invention also provides a method for preparing an optical coating material for shoes. After the shoe upper material is cleaned, it is placed in a vacuum coating device, and the optical coating for shoes is evaporated on the shoe upper material. The shoe upper material is taken out, and the optical coating for shoes is formed on its surface.

[0039] The vacuum degree of the vacuum coating equipment is evacuated to 1×10-3Pa to 5×10-3Pa.

[0040] The film thickness of optical coating for shoes is 200-500nm.

[0041] Upper materials include EVA, nylon, TPU, leather, mesh, etc.

[0042] Additives include scratch resistance agents, adhesion promoters, viscosity regulators, etc.

[0043] Example 1

[0044] An optical coating material for shoes comprises the following components in parts by weight: 10 parts by weight of organic silicone resin, 10 parts by weight of SiO2 / TiO2 composite particles, 1 part by weight of microcapsules, 0.1 parts by weight of a refractive index regulator, and 1 part by weight of an auxiliary agent.

[0045] The SiO2 / TiO2 composite particles are SiO2 / TiO2 composite particles with a core-shell structure.

[0046] The SiO2 / TiO2 composite particles have a core layer of SiO2 and a shell layer of TiO2.

[0047] The microcapsule is composed of a wall material and a core material, wherein the core material includes a thermochromic pigment and the wall material is an organic silicone resin.

[0048] The refractive index adjusting agent includes a high refractive index material and / or a low refractive index material.

[0049] The high refractive index material is selected from any one of Si3N4, Ti3O5, and NB2O5, and the low refractive index layer is a material composed of SiO2 or Al2O3.

[0050] The method for preparing the shoe optical coating material comprises the following steps: cleaning the shoe upper material, placing the shoe upper material in a vacuum coating device, vapor-depositing the shoe optical coating on the shoe upper material, and taking out the shoe upper material to form the shoe optical coating on its surface.

[0051] The vacuum degree of the vacuum coating equipment is evacuated to 1×10-3Pa to 5×10-3Pa.

[0052] The film thickness of optical coating for shoes is 200-500nm.

[0053] Upper materials include EVA, nylon, TPU, leather, mesh, etc.

[0054] Additives include scratch resistance agents, adhesion promoters, viscosity regulators, etc.

[0055] Example 2

[0056] An optical coating material for shoes comprises the following components in parts by weight: 50 parts by weight of organic silicone resin, 5 parts by weight of SiO2 / TiO2 composite particles, 1 part by weight of microcapsules, 1 part by weight of a refractive index regulator, and 2 parts by weight of an auxiliary agent.

[0057] The other components and steps are the same as those in Example 1.

[0058] Example 3

[0059] An optical coating material for shoes comprises the following components in parts by weight: 80 parts by weight of organic silicone resin, 1 part by weight of SiO2 / TiO2 composite particles, 5 parts by weight of microcapsules, 0.5 parts by weight of a refractive index regulator, and 5 parts by weight of an auxiliary agent.

[0060] The other components and steps are the same as those in Example 1.

[0061] Comparative Example 1

[0062] Based on Example 2, the SiO2 / TiO2 composite particles are replaced by SiO2 particles.

[0063] Comparative Example 2

[0064] Based on Example 2, the SiO2 / TiO2 composite particles are replaced by TiO2 particles.

[0065] Comparative Example 3

[0066] On the basis of Example 2, the microcapsules are replaced with core material thermochromic pigments.

[0067] Performance Testing

[0068] (1) Accelerated aging test: The upper materials of Examples 1-3 and Comparative Examples 1-3 were subjected to a 1500-h artificial weathering aging test (the test was conducted in accordance with "GB / T 1865-1997 Artificial Weathering and Artificial Radiation Exposure of Paints and Varnishes"), and the appearance was observed to see if there was any abnormality such as peeling. If there was any peeling, it was marked as ×, and if it was intact, it was marked as √.

[0069] (2) Yellowing resistance test: The optical coatings for shoes of Examples 1-3 and Comparative Examples 1-3 were sprayed on two cleaned metal plates, and baked at 280°C for 10 min. One metal plate was taken out as a standard plate, and the other metal plate was baked in an oven at 280°C for 1 hr and then taken out as a sample plate. The yellowing of the optical coatings on the sample plates was compared. If yellowing occurred, it was marked as ×, and if no yellowing occurred, it was marked as √.

[0070] (3) Thermochromic test: The optical coatings for shoes of Examples 1-3 and Comparative Examples 1-3 were heated from room temperature to 60° C. by infrared heating, and the optical coatings for shoes were observed to see if they changed color.

[0071] The above performance test results are shown in Table 1 below:

[0072]

[0073] From the above examples and comparative examples, after replacing SiO2 / TiO2 composite particles with SiO2 particles, the yellowing resistance performance deteriorates. This may be because TiO2 has the function of ultraviolet shielding, which can improve the yellowing resistance performance in SiO2 / TiO2 composite particles. After replacing SiO2 / TiO2 composite particles with TiO2 particles, due to the lack of the reinforcing bonding effect of SiO2 particles, peeling phenomenon is prone to occur after accelerated aging test. When microcapsules are replaced with core material thermochromic pigments, the thermochromic effect disappears. This may be because without the protection of the microcapsule structure, the thermochromic pigments are destroyed during the evaporation process, so the appearance effect of changing color due to temperature changes cannot be achieved.

[0074] In general, since traditional shoe surfaces usually do not use optical coating technology or materials such as microcapsules, it is impossible to obtain an appearance effect that changes color according to temperature changes; if SiO2 / TiO2 composite particles are not used, the upper surface is prone to yellowing and the colored appearance part peels off after long-term use. However, the present invention uses optical coating for shoes to ensure that the upper surface does not change color or peel off after long-term use in harsh environments, and maintains the appearance effect of thermochromic change.

[0075] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An optical coating material for shoes, characterized in that: The invention comprises the following ingredients in parts by weight: 10-80 parts by weight of organic silicone resin, 1-10 parts by weight of SiO2 / TiO2 composite particles, 0.01-5 parts by weight of microcapsules, 0.1-1 parts by weight of a refractive index regulator and 0-5 parts by weight of an auxiliary agent; the SiO2 / TiO2 composite particles are SiO2 / TiO2 composite particles with a core-shell structure; the core layer of the SiO2 / TiO2 composite particles is SiO2, and the shell layer is TiO2; the microcapsules are composed of a wall material and a core material, wherein the core material comprises a thermochromic pigment and the wall material is organic silicone resin.

2. The optical coating material for shoes according to claim 1, characterized in that: The refractive index adjusting agent includes a high refractive index material or a low refractive index material.

3. The optical coating material for shoes according to claim 2, characterized in that: The high refractive index material is selected from any one of Si3N4, Ti3O5, and Nb2O5, and the low refractive index material is a material composed of SiO2 or Al2O3.

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