KR20070074518A - Paint for transparent film and transparent film coated substrate - Google Patents

Abstract

Provided is a coating agent for forming a transparent coating film, which forms a low-refractive index transparent coating film having excellent adhesion to a substrate, strength, water repellent property and whitening resistance. The coating agent for forming a transparent coating film comprises low-refractive index particles, a matrix-forming component, a polymerization initiator and a solvent. The low-refractive index particles are treated with a silane coupling agent, the surface-treated low-refractive index particles have a refractive index of 1.20-1.45, and the low-refractive index particles are used in an amount of 0.1-10 wt% on the solid content basis. The matrix-forming component includes a silicone resin and/or an acrylic resin, and is used in an amount of 0.5-20 wt% on the solid content basis.

Description

Paint for transparent film and transparent film coated substrate

The present invention relates to a transparent film-forming coating material made of low refractive index fine particles, a matrix-forming component, a polymerization initiator, and a solvent, and a transparent film-forming substrate formed from a transparent film formed by using the transparent film-forming paint on the substrate.

More specifically, it is possible to form a low refractive index transparent film excellent in adhesion with the substrate, strength, water repellency, whitening resistance, and the like, and the transparent film reflecting the shape of the added substrate or the lower layer surface, for example, the surface of the lower layer In the case of each unevenness, it is possible to form a transparent film having the same uneven surface as that of the unevenness. For this purpose, a transparent film-forming paint which can be preferably used to form a transparent film having excellent antireflection performance and anti-glare performance. And a transparent coating part substrate.

It is conventionally known to form an anti-reflection film on this surface in order to prevent reflection of the surface of the substrate such as glass, plastic sheet, plastic lens, and the like. For example, a fluorine resin, magnesium fluoride and A method of forming an antireflection film by forming a film of the same low refractive index material on the surface of a substrate of glass or plastic or by applying a coating liquid containing low refractive index fine particles such as silica particles to the surface of the substrate (for example, At this time, it is also known to form a high refractive index film containing high refractive index fine particles and the like in the lower layer of the antireflective coating in order to enhance the antireflection performance. Moreover, in order to provide anti-glare property, unevenness | corrugation is formed in the antireflection film surface.

Patent Document 1: Japanese Patent Application Laid-Open No. 7-133105

However, in the conventional method, a transparent coating having desirable anti-reflection performance and anti-glare performance, such as having a small allowable range of paint concentration, viscosity, solvent, coating method, drying conditions, etc., and excellent adhesion to a substrate, strength, transparency, and whitening resistance, etc. There was a difficulty in forming the film with excellent reproducibility.

The technical problem to be solved by the present invention is to study the above problems, and as a result, the adhesiveness and strength with the substrate using a coating liquid containing a specific concentration of low refractive index fine particles treated with a specific silane coupling agent and containing a specific matrix forming component When a low refractive index transparent film excellent in water repellency and whitening resistance is formed, and a transparent film is formed on an underlayer film having irregularities on the added surface, the transparent film surface is flattened to form a transparent film having the same irregularities as the lower irregularities. To develop a paint and a transparent coating base material.

An object of the present invention is to provide a paint for forming a transparent film having the following configuration.

[1] a transparent film-forming paint composed of low refractive index fine particles, a matrix forming component, a polymerization initiator and a solvent,

(Iii) the low refractive index fine particles are treated with a silane coupling agent, the refractive index of the surface-treated low refractive index fine particles is in the range of 1.20 to 1.45, and the concentration of the low refractive index fine particles is in the range of 0.1 to 10% by weight as solid content,

(Ii) The matrix forming component is a silicone-based resin and / or an acrylic resin, and the concentration of the matrix forming component is in the range of 0.5 to 20% by weight as a solid content.

[2] The matrix forming component is a resin obtained by polymerizing a trifunctional or higher functional silicone resin monomer as a silicone resin and / or a resin obtained by polymerizing a trifunctional or higher functional acrylic resin monomer as an acrylic resin.

[3] The matrix forming component is a paint for forming a transparent film, wherein the silicone resin is a silicone resin having a (meth) acryloyl group and / or the acrylic resin is a (meth) acrylic resin having a (meth) acryloyl group.

[4] The matrix forming component includes a resin in which a bifunctional or less functional resin monomer is polymerized as a water repellent, wherein the resin is a silicone resin having a (meth) acryloyl group, a fluororesin having a (meth) acryloyl group, A coating material for forming a transparent film, which is at least one resin selected from a long-chain acrylic resin having a (meth) acryloyl group and a siloxane-based acrylic resin.

[5] The transparent coating film is polymerized with (i) a bifunctional and / or trifunctional acrylic resin monomer when the matrix is a silicone resin, and (ii) a bifunctional acrylic resin monomer when the matrix is an acrylic resin. The paint for forming a transparent film, characterized by further comprising an acrylic resin as a stress relaxation agent.

[6] The paint for forming a transparent film, wherein the polymerization initiator comprises a phosphine-based polymerization initiator or a cation-based photopolymerization initiator.

[7] The solvent is a mixed solvent of a solvent (A) having a boiling point of 50 to 100 ° C. and a solvent (B) having a boiling point of 100 to 200 ° C., and the content of the solvent (A) in the mixed solvent is 50 to 90 weight. %, And the content of the solvent (B) is a coating film for forming a transparent film, characterized in that 10 to 50% by weight.

[8] The silane coupling agent on which the low refractive index fine particles are surface-treated is a silane coupling agent having at least one functional group selected from a (meth) acryloyl group, an epoxy group (glycid group), a urethane group, an amino group, and a fluorine group. Transparent film-forming paint, characterized in that.

[9] A transparent coating part base material comprising a transparent coating film formed on the substrate using the coating film for forming a transparent film according to any one of [1] to [9].

EMBODIMENT OF THE INVENTION Hereinafter, the coating material for transparent film formation which concerns on this invention is demonstrated in detail.

Paint for forming transparent film

The transparent film-forming paint according to the present invention is made from low refractive index fine particles, matrix forming components, a polymerization initiator, and a solvent.

Low refractive index fine particles

In this invention, the low refractive index microparticles | fine-particles surface-treated with a silane coupling agent, acrylic acid ester, etc. are used.

The average particle size of the low refractive index fine particles to be used is preferably in the range of 20 to 500 nm, more preferably 40 to 100 nm, and the refractive index is preferably in the range of 1.15 to 1.40.

The low refractive index fine particles are not particularly limited as long as they have a low refractive index, but inorganic oxides such as SiO ₂ , Al ₂ O ₃ , TiO ₂ , ZrO ₂ , SnO _2, and CeO ₂ or composite oxides thereof, such as SiO ₂ -Al ₂ Particles such as O ₃ , TiO ₂ -Al ₂ O ₃ , TiO ₂ -ZrO ₂ , SiO ₂ -TiO ₂ , SiO ₂ -TiO ₂ -Al ₂ O ₃ , and the like may be used, and Japanese Patent Application Laid-Open No. 7 The silica particles disclosed in -133105, WO 00/37359, 2001-233611, and 2003-192994 are silica-based fine particles having a cavity therein, and have a low refractive index, fine particles in a colloidal region, and dispersibility. It is preferable to employ | adopt as being excellent in etc.

Specifically, the fine particles are hollow spheres in which a cavity is formed inside the outer end having pores, and in the cavity, silica-based fine particles including a solvent and / or a gas are preferable. It is usually preferred that the outer thickness is in the range of 1 nm to 50 nm, and in the range of 1/50 to 1/5 of the average particle size. On the other hand, it is preferable that the outer layer is usually composed only of silica. On the other hand, in the case where transparent oxide (MO _x ) is contained as described above, it is appropriate that the MO _x / SiO ₂ is 0.0001 to 0.2 having high transparency.

As the silane coupling agent, methyltrimethoxysilane, dimethyldimethoxysilane, phenyltrimethoxysilane, diphenyldimethoxysilane, methyltriethoxysilane, dimethyldiethoxysilane, phenyltriethoxysilane, diphenyldiethoxysilane , Isobutyltrimethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (β-methoxyethoxy) silane, 3,3,3-trifluoropropyltrimethoxysilane, methyl-3 , 3,3-trifluoropropyldimethoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, γ-glycidoxymethyltrimethoxysilane, γ-glycidoxymethyltriethoxy Silane, γ-glycidoxyethyltrimethoxysilane, γ-glycidoxyethyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, γ- (β -Glycidoxy methoxy) propyltrimethoxysilane, γ- (meth) acrylooxymethyltrimethoxysilane, γ- (methoxy ) Acrylooxymethyltriethoxysilane, (gamma)-(meth) acrylooxyethyltrimethoxysilane, (gamma)-(meth) acrylooxyethyltriethoxysilane, (gamma)-(meth) acrylooxypropyl trimethoxy Silane, γ- (meth) acrylooxypropyltrimethoxysilane, γ- (meth) acrylooxypropyltriethoxysilane, butyltrimethoxysilane, isobutyltriethoxysilane, hexyltriethoxysilane octyl trie Methoxysilane, decyltriethoxysilane, butyltriethoxysilane, isobutyltriethoxysilane, hexyltriethoxysilane, octyltriethoxysilane, 3-ureidoisopropylpropyltriethoxysilane, perfluorooctylethyl Trimethoxysilane, perfluorooctylethyltriethoxysilane, perfluorooctylethyltriisopropoxysilane, tripleuropropyltrimethoxysilane, N-β (aminoethyl) γ-aminopropylmethyldimethoxysilane , N-β (aminoethyl) γ-aminopropyl Trimethoxysilane, N-phenyl- (gamma)-aminopropyl trimethoxysilane, (gamma)-mercaptopropyl trimethoxysilane, trimethyl silanol, methyl trichlorosilane, etc. are mentioned.

Particularly, the silane coupling agent has one or more functional groups selected from (meth) acryloyl group, epoxy group (glysidic group), urethane group, amino group, and fluorine group. It is possible to perform surface treatment, and the obtained surface-treated low refractive index fine particles are excellent in dispersibility in paints and transparent films. On the other hand, the low refractive index microparticles | fine-particles which were surface-treated are excellent in reactivity with the following matrix formation component, and the transparent film excellent in transparency, strength, abrasion resistance, etc. can be obtained by this.

On the other hand, the low refractive index microparticles | fine-particles can also use what was processed by the polyfunctional acrylic acid ester resin which has hydrophobicity.

Examples of the hydrophobic polyfunctional acrylic acid ester resins include pentaerythritol triacrylate, pentaerythritol tetraacrylate, trimethylolpropane tri (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, dipentaerythritol hexaacrylate, Methyl methacrylate, ethyl methacrylate, butyl methacrylate, isobutyl methacrylate, 2-ethylhexyl methacrylate, isodecyl methacrylate, n-lauryl acrylate, n-stearyl acrylate, 1 , 6-hexanediol dimethacrylate, perfluorooctylethyl methacrylate, trifluoroethyl methacrylate, urethane acrylate, and the like.

As a surface treatment method of low refractive index microparticles | fine-particles, the said silane coupling agent is added to the alcohol dispersion liquid of a silica fine particle in fixed amount, for example, water is added here, and the catalyst for hydrolysis of a silane coupling agent as needed. As a method, the method of hydrolyzing an organosilicon compound by adding an acid or an alkali is mentioned. In the case of using the polyfunctional acrylic acid ester resin having the hydrophobicity described above, the polyfunctional acrylic acid ester resin is dispersed in an alcohol dispersion of silica-based fine particles to attach the polyfunctional acrylic acid ester to the surface of the low refractive index labyrin, and as a polymerization initiator The acrylate ester is polymerized to coat the particle surface of the low refractive index fine particles.

Substitution with an organic solvent can give an organic solvent dispersion of the surface-treated low refractive index fine particles. It is preferable to use the following solvent as an organic solvent.

At this time, the weight ratio of the low refractive index labyrinth and the silane coupling agent or the hydrophobic polyfunctional acrylic acid ester resin (the weight of the silane coupling agent or the hydrophobic polyfunctional acrylic acid ester resin as a solid content / weight of the low refractive index fine particles) is low. Although it depends on the average particle size of refractive index microparticles | fine-particles, it is preferable that it is the range of 0.05-1, preferably 0.1-0.5. When the above weight ratio is smaller than this range, the dispersibility and stability are low in the polar solvent, the stability of the paint is insufficient, and when the low refractive index fine particles are agglomerated in the paint to form a film, the film is whitened and the adhesion to the substrate and the hardness of the film are May be insufficient. When the weight ratio is larger than 1, the hydrophobicity is increased depending on the kind of the matrix forming component to be used. The low-refractive index fine particles surface-treated in the coating are agglomerated, and when the film is formed, the film becomes white and the hardness of the adhesive film with the substrate is insufficient. On the other hand, when there are many surface treating agents with a higher refractive index than low refractive index microparticles | fine-particles, the refractive index of the surface-treated low refractive index microparticles | fine-particles may become high, and the refractive index of the obtained transparent film may raise and antireflection performance, contrast, etc. may not improve.

The average particle size of the low refractive index fine particles after the surface treatment is a slight increase (depending on the throughput) without substantially changing. When the average particle size of the low refractive index fine particles is significantly increased as compared to the low refractive fine particles before the treatment, the throughput may increase and the refractive index of the fine particles may be damaged.

The particle size measurement method of the low refractive index microparticles | fine-particles and the surface-treated low refractive index microparticles | fine-particles used by this invention is the particle size by rusty | rusting about 100 particle | grains by carrying out transmission electron micrograph (TEM) of the low refractive index microparticles and the surface-treated low refractive index microparticles | fine-particles. The particle size is calculated by considering the magnification and the average value is obtained.

The refractive index of the low refractive index particle size after the surface treatment is in the range of 1.20 to 1.45, preferably in the range of 1.20 to 1.35.

The refractive index after surface treatment tends to be increased, and it is difficult for the refractive index to be less than the lower limit of the above range. When the refractive index is high, the antireflection performance is insufficient compared with the refractive index of the substrate or the underlayer film, and the bright partial contrast is insufficient because the reflectivity of the transparent film is high.

The measuring method of the refractive index of the low refractive index microparticles | fine-particles and surface-treated low refractive index microparticles | fine-particles used by this invention are

(1) The dispersion medium is evaporated from the low refractive index fine particles or the surface treated low refractive index fine particle dispersion by an evaporator.

(2) This is dried at 120 ° C. to powder.

(3) Drop the standard refractive liquid with known refractive index onto a two or three drop glass plate and mix the powder therewith.

(4) The refractive index of the standard refractive solution when the mixed solution becomes transparent by performing the operation of (3) above is set to the refractive index of the particles.

The density | concentration of the low refractive index microparticles | fine-particles surface-treated in the coating film for transparent film formation is 0.1 to 1.0 weight% as solid content, Preferably it is 0.2 to 5 weight%, It is preferable that it is the range of 0.5 to 3.0 weight% especially. Since a transparent film having a low refractive index is not obtained even at a low concentration, the reflectivity of the transparent film is increased, resulting in insufficient antireflection performance and insufficient bright partial contrast. Even if the concentration of the particles is increased, the applicability is lowered, and it is difficult to form a uniform transparent film, and the flatness of the surface is lost, or voids are formed inside the transparent film, so that the phase value of the transparent film due to scattering of light is increased and also the scratch The commerciality is insufficient.

Matrix forming components

In the present invention, a silicone resin and / or an acrylic resin are used as the matrix forming component.

[Silicone resin]

Examples of the silicone resin include copolymers of (meth) acrylic resins with organosilicon oxides having functional groups such as glycidoxy groups or (meth) acryloxy groups, and hydrolyzates thereof, or mixtures of those obtained by radical polymerization and hydrolysis, respectively, or methyl silicones. Resin, methylphenyl-based silicone resin, acrylic modified silicone resin, epoxy modified silicone resin may be used.

Examples of the organosilicon compound having the functional group include γ-glycidoxymethyltrimethoxysilane, γ-glycidoxymethyltriethoxysilane, γ-glycidoxyethyltrimethoxysilane, and γ-glycidoxyethyltrie Oxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, γ- (β-glycidoxyethoxy) propyltrimethoxysilane, γ- (meth) acrylooxy Methyltrimethoxysilane, γ- (meth) acrylooxymethyltriethoxysilane, γ- (meth) acrylooxyethyltrimethoxysilane, γ- (meth) acryloxyoxytriethoxysilane, γ- (Meth) acrylooxypropyl trimethoxysilane, (gamma)-(meth) acrylooxypropyl triethoxysilane, etc. are mentioned.

Among these silicone resins, a resin in which a silicone-based resin monomer having a trifunctional group or less is polymerized is preferable. Such a silicone-based resin has a large number of reactive functional groups (bonding water), thereby strongly binding the surface-treated low refractive index fine particles between the resin components for forming the matrix to form a transparent film having excellent strength and wear resistance.

In the present invention, the silicone resin having a (meth) acryloyl group as a functional group is preferable to strongly fix the bond with the low refractive index fine particles surface-treated therebetween as the resin component for matrix formation.

As silicone resin which has a (meth) acryloyl group, the silicone solution of Shin-Wol Chemical Co., Ltd .: Product name: X-12-2400, The silicone coat liquid of GE Co., Ltd. silicone company: Product name: UVHC1101, etc. are mentioned. . These are tetrafunctional silicone resins.

[Acrylic resin]

As acrylic resin, dipentaerythritol hexaacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, trimethylol propane tri (meth) acrylate, pentaerythritol tetraacrylate, ditrimethylol propane tetra (meth) acrylate , Dipentaerythritol hexaacrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, isobutyl methacrylate, 2-ethylhexyl methacrylate, isodecyl methacrylate, n-lauryl acrylate , n-stearyl acrylate, 1,6-hexanediol dimethacrylate, perfluorooctylethyl methacrylate, trifluoroethyl methacrylate, urethane acrylate, and the like.

It is preferable that acrylic resin is resin to which the acryl-type resin monomer more than trifunctional group superposed | polymerized. Such an acrylic resin has a large number of reactive functional groups (bonding water), thereby strongly bonding the low refractive index fine particles surface-treated between the resins, thereby forming a transparent film having excellent strength and wear resistance.

In the present invention, an acrylic resin having a (meth) acryloyl group as a functional group is particularly preferred as a highly reactive resin for strongly fixing the bond with the low refractive index fine particles surface-treated between the resins.

As the acrylic resin having a (meth) acryloyl group, manufactured by Kohsa Chemical Co., Ltd .: Product name: Ride acrylate DPE-6A (dipenta erythritol hexaacrylate), Co., Ltd .: Chemical name: Ride acrylate DPE-4A (Penta erythritol) Tetraacrylate) etc. are mentioned.

The concentration of the matrix forming component contained in the transparent coating film is preferably in the range of 0.5 to 20% by weight and preferably in the range of 0.8 to 10% by weight.

When the concentration of the matrix forming component decreases, the thickness of the transparent film becomes insufficient, and when applied repeatedly, a uniform film thickness is obtained and scratches appear in the appearance of the transparent film.

As the concentration of the matrix forming component increases, the film thickness becomes thick, and a uniform film thickness is obtained, resulting in scratches on the appearance of the transparent film. In particular, in the case of forming a transparent coating having anti-glare properties using a substrate having irregularities on the surface of the substrate or the underlayer film, the concentration of the matrix forming component in the transparent coating film is preferably in the range of 1.0 to 3.0% by weight as solid content. If it is in this range, the uneven | corrugated surface of a base material or an underlayer film | membrane can be reflected, and the transparent film which has surface unevenness | corrugation can be formed.

On the other hand, the content of the matrix forming component with respect to the particles is in the range of 30 to 99% by weight, preferably 40 to 98% by weight as the content of the matrix component in the obtained transparent film, and the amount of the low refractive index fine particles surface-treated is obtained. The content of the low refractive index fine particles surface-treated in the transparent coating is in the range of 1 to 70% by weight, preferably 2 to 60% by weight as solid content.

In this weight ratio, a low refractive index transparent film excellent in adhesion to the matrix-forming substrate, strength, water repellency, and whitening resistance can be formed for the purpose of the present invention, and a transparent film is formed on the underlayer film having irregularities on the surface. In one case, the surface of the transparent coating may be flattened to form a transparent coating having the same unevenness as that of the lower unevenness.

[Water repellent]

Preferably, in the present invention, it is preferable to include a resin in which the resin monomer having a bifunctional group or less is polymerized as a water repellent agent. It is preferable that the said resin is 1 or more types chosen from the silicone type resin which has a (meth) acryloyl group, the fluororesin which has a (meth) acryloyl group, the long chain alkyl resin which has a (meth) acryloyl group, and a siloxane type acrylic resin. Do.

When such resin is used, it is low in compatibility with the matrix component and appears to be located on the surface layer of the transparent film, whereby water repellency (water droplet contact angle of 90 degrees or more) is expressed on the surface layer of the transparent film, and fingerprints, sebum, sweat, etc. It can prevent the contaminants from sticking and can be easily wiped off.

As silicone resin which has a (meth) acryloyl group, what attached the (meth) acryloyl group to one terminal of polysiloxane, etc. are mentioned, For example, modified silicone oil of Shin-Wol Chemical Co., Ltd. brand name: X-24- 8201 (functional equivalent 2100), X-22-174-DX (functional equivalent 4600), X-24-8201, X-22-2426 (functional equivalent 12000), etc. can be used suitably.

As a long-chain alkyl resin having a (meth) acryloyl group, Shin-Jung Industrial Co., Ltd. product name: NK ester A-NOD-N (1,9-nonanediol diacrylate), Shin-Jung Industrial Co., Ltd. product name: NK ester A- DOD (1,10-decanediolacrylate) etc. can be used suitably.

As the siloxylic acid-based acrylic resin, a resin bonded to an acrylic resin such as urethane acrylate at one end of the polysiloxane, for example, an externally curable resin manufactured by Nippon Synthetic Chemical Co., Ltd .: trade name: light-emitting UT-3841) and the like are suitably used. Can be.

The content of the water repellent in the paint for forming a transparent film is preferably 0.1 to 10% by weight and preferably in the range of 0.5 to 5% by weight with respect to the matrix forming component.

When the content of the water repellent is low, antifouling effects such as water repellency, anti-fingerprint adhesion, and magic ink weaving property are not obtained, and even when the content is increased, the surface of the film is exposed to the surface of the coating (breed-out), and the appearance of scratches, whitening, etc. The abnormality and the hardness of the film become insufficient [stress relieving agent].

It is also preferable to include a stress relaxation agent.

(Iii) when the matrix is a silicone resin, a bifunctional and / or trifunctional acrylic resin monomer,

(Ii) In the case where the matrix is an acrylic resin, it is preferable that the bifunctional acrylic resin monomer contains an acrylic resin polymerized therein.

As bifunctional acrylic resin, tricyclodecane dimethyrol diacrylate, bisphenol diacrylate, isocyanyl diacrylate, tripropylene glycol diacrylate, polypropylene glycol diacrylate, polyethylene glycol diacrylate, tetraethylene diacryl Rate, 1,10-decanediol diacrylate, 1,6 hexanediol acrylate, neopentyl glycol diacrylate, dipropylene glycol diacrylate, dimetholol dicyclopentane diacrylate, modified bisphenol A diacrylate, Phthaldiol dimethacrylate, diethylene glycol dimethacrylate, hexanediol dimethacrylate, polyethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate, bisphenol Aethoxydimethacrylate, etc. are mentioned.

Pentaerythritol triacrylate, isocyanyl triacrylate, trimetholpropane triacrylate, trimetholpropane ethoxy triacrylate, glycerin propoxytriacrylate, etc. are mentioned as trifunctional acrylic resin.

The content of the stress releasing agent in the transparent coating film is 0.05 to 10% by weight, preferably 0.1 to 4% by weight, based on the solid content of the matrix forming component. When the content of the stress relaxation agent decreases, the substrate bends in the case of a flexible film or the like, and when the content of the stress relaxation agent increases, the hardness of the transparent film becomes insufficient.

[Polymerization Initiator]

The polymerization initiator is contained in the coating film for transparent film formation of this invention.

The polymerization initiator is not particularly limited as long as it is possible to polymerize and cure the matrix-forming component, and a conventionally known polymerization initiator can be used by appropriately selecting the resin according to the resin.

For example, the cationic photoinitiator of polymerization initiators, such as an acyl phosphine oxide, an acetphenol, a propion phenol, benzyl, benzoin, benzophenol, thioxanthone, etc. are mentioned. In this invention, the phosphine pin photoinitiator of acylphosphine oxide or the polymerization initiator of photocation are used suitably. Especially, when a phosphine photoinitiator is used, stability is not impaired even if the coating material is preserved for a long time, colorability does not disappear, and a transparent film is not colored after hardening. In this case, the phosphine photopolymerization initiator may be mixed with a polymerization initiator such as acetphenol, propionphenol, benzyl, benzoin, benzophenol, thioxanthone, or the like. As a phosphine photoinitiator, 2,4,6- trimethyl benzoyl diphenyl phosphine oside (BASF Japan Co., Ltd. make: Lucirin TPO) etc. are mentioned, for example.

On the other hand, since the cationic photopolymerization initiator is not affected by oxygen different from the polymerization initiator, it is not necessary to perform UV irradiation in a nitrogen atmosphere, and can be appropriately selected in terms of being able to perform UV irradiation in air. Examples of photocationic polymerization initiators include: Ukdong Co., Ltd .: Product Name: Adeka Optma-SP-170, Tiba Sprasharit Co., Ltd .: Product Name: IRUGACURE250, Japan Procurement Co., Ltd .: Product Name: CI-1370, etc. Can be mentioned.

The content of the polymerization initiator in the paint varies depending on the type of the matrix forming component, but when the matrix forming component and the polymerization initiator are solid content, it is preferably 0.1 to 20% by weight of the matrix forming component, and preferably 5 to 10% by weight. Do.

When the content of the polymerization initiator decreases, curing of the coating film becomes insufficient, and even if it increases, the coating material stability becomes insufficient, resulting in insufficient hardness of the obtained transparent film [solvent].

The solvent used in the present invention is not particularly limited as long as the component can be dissolved or dispersed, and a conventionally known solvent can be used.

Specific examples include alcohols such as methanol, ethanol, propanol, 2-propanol (IPA), butanol, diacetone alcohol, perfuryl alcohol, furfuryl alcohol, tetrahydrofurfuryl alcohol, ethylene glycol, hexylene glycol and isopropyl glycol; Esters such as methyl acetate, ethyl acetate and butyl acetate; Ethers such as diethyl ether, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, and propylene glycol monomethyl ether; Ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, acetyl acetone and acetoacetic acid ester, methyl vertical solver, ethyl vertical solver, butyl vertical solver, toluene, cyclohexanone, isophorone and the like.

Especially, the solvent which has carbonyl groups, such as ester and ketone, can be used suitably. When the solvent containing the carbonyl group is included, the surface-treated low-refractive index fine particles are uniformly dispersed to improve the stability of the coating and to form the unevenness of the lower layer when forming a transparent film having irregularities excellent in uniformity, adhesion to the substrate or film, and strength. It is possible to form a transparent film having unevenness corresponding to and excellent in reproducibility.

These may be used alone or in combination of two or more thereof. In the present invention, it is preferable to use two or more kinds of solvents having different boiling points.

In the present invention, the solvent is a mixed solvent of a solvent (A) having a boiling point at 50 to 100 ° C. and a solvent (B) having a boiling point at 100 seconds to 200 °, and the ratio of the solvent (A) in the mixed solvent is 50 to 90. It is preferable that it is the range of the weight%, and the ratio of the solvent (B) is in the range of 10 to 50% by weight.

As a solvent (A), Alcohol, such as methanol, ethanol, a propanol, 2-propanol (IPA); Esters such as methyl acetate, ethyl acetate and butyl acetate; Ketones, such as acetone and methyl ethyl ketone, toluene, etc. are mentioned. These may be used independently and may be used in mixture of 2 or more types.

Examples of the solvent (B) include alcohols such as butanol, diacetone alcohol, furfuryl alcohol, tetrahydrofurfuryl alcohol, ethylene glycol, hexylene glycol, and isopropyl glycol; Ethers such as diethyl ether, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, and propylene glycol monomethyl ether; Ketones such as methyl isobutyl ketone, acetyl acetone and acetoacetic acid ester, methyl vertical solver, ethyl vertical solver, butyl vertical solver, toluene, cyclohexanone, isophorone and the like. These may be used independently and may be used in mixture of 2 or more types.

Increasing the ratio of the solvent (A) in the mixed solvent accelerates the drying of the coating film, thereby making the transparent coating less dense, resulting in insufficient hardness and scratch resistance. In addition, when the paint contains a water repellent, the water repellent moves to the upper layer of the transparent film in a state dissolved in the solvent (B), and is decentralized in the dried film, resulting in insufficient water repellent effect.

When the proportion of the solvent (A) in the mixed solvent decreases, other solvents (B) increase, which delays the drying of the coating film, thereby making it impossible to form a transparent film having irregularities sufficiently reflecting the irregularities on the surface of the substrate or the lower layer. to be.

Preferably the proportion of solvent (B) in the mixed solvent is in the range of 20 to 40% by weight. The proportion of the solvent in the paint for forming the transparent film is about 70 to 99% by weight, preferably 80 to 98% by weight.

The conventionally well-known method can be selected as a method of forming a transparent film using the coating film for transparent film formation which concerns on this invention.

Specifically, the coating film for transparent film formation is applied to a substrate by a known method such as dipping, spraying, spinner, roller coating, bar coating, gravure printing, microgravure printing, and the like, and dried, and irradiated with ultraviolet rays. It can harden | cure by a conventional method, such as heat processing, and can form a transparent film.

On the other hand, to form a transparent coating having anti-glare plus anti-reflective performance, the polar solvent in the transparent coating film of the present invention may be formed by using a conventionally known substrate having a concave-convex surface or a lower layer coating substrate. It is preferable that it is formed from the mixed solvent of the said low boiling point solvent and the high boiling point solvent, the density | concentration to the solid content of a matrix formation component is 1-3 weight%, and it is preferable to apply | coat a coating material, dry it, and harden | cure by ultraviolet irradiation. At this time, the coating method is preferably a microgravure printing method.

Transparent coating part base material

The transparent coating part base material which concerns on this invention is a thing made from the transparent film formed using the said coating film for transparent film formation of a base material and a base material.

materials

Examples of the base material include cellulose base materials such as triacetyl cellulose film, diacetyl cellulose film, and acetate butyrate cellulose film, polyester base materials such as polyethylene terephthalate and polyethylene naphthalate, polyethylene film, polypropylene film, and cyclic polyolefin. Polyolefin-based films such as polyolefin-based substrates such as films, polyamide-based substrates such as nylon-6 and nylon-66, polyurethane-based films, polycarbonate films, polyether films, polyethersulfone films, polystyrene films, and polymethylpentene films And base materials such as polyether ketone film and acrylonitrile film. Moreover, the coating part base material in which the film was formed on such a base material can be used.

As another film, a hard coat film, a conductive film, a high refractive index film, or a conventionally known film having these functions can be mentioned. On the other hand, if necessary, a transparent coating portion substrate having anti-glare performance can be obtained by using a substrate having unevenness on the surface and a coating portion substrate having a coating.

Transparent film

The transparent coating is made of the surface treated low refractive index fine particles, the matrix component, the polymerization initiator, the water repellent and the stress relieving agent formed from the paint.

Surface-treated low refractive index microparticles | fine-particles are the same as the above-mentioned.

The matrix component is one in which the silicone resin and / or acrylic resin are polymerized and solidified.

The content of the low refractive index microparticles | fine-particles surface-treated in a transparent film is 5 to 70 weight% as solid content, Preferably it is 10 to 60 weight%, It is preferable that it is especially the range which is 30-50 weight%. When it is in this range, the transparent film can be formed, the refractive index is increased, the antireflection performance is increased, and the bright partial contrast is excellent, the film is uniform, the surface flatness is excellent, and light scattering is not caused. By lowering the value, it is possible to form a transparent coating, which is preferably excellent in scratch resistance.

Matrix formation content in a transparent film is 30 to 95 weight% in solid content, Preferably it is the range which is 40 to 90 weight%. When the matrix formation content is within this range, adhesion to the substrate and scratch resistance can be increased, a refractive index can be reduced, and a transparent film excellent in antireflection performance can be formed.

Since the water repellent is incompatible with the matrix component, the water repellent is located on the surface layer of the transparent film, thereby expressing water repellency (contact angle of water drop of 90 degrees or more) on the surface of the transparent film, and contaminants such as fingerprints, sebum, and sweat adhere to it. It can be prevented and can be easily wiped off even when attached.

The content of the water repellent in the transparent coating is preferably in the range of 0.1 to 10% by weight of solid content, preferably 0.5 to 5% by weight, based on the matrix component. If it exists in this range, sufficient water repellency will be provided, antifouling effect, such as anti-fingerprint adhesiveness and magic ink weaving property, will become high, and also abnormalities of external appearances, such as a bleed out, a scratch, whitening, and a hardness of a film will not become inadequate.

The stress relaxation agent contained in the transparent film is a polymerization of the bifunctional and / or trifunctional (meth) acrylic resins.

The content of the stress relaxation agent in the transparent coating is preferably in the range of 0.05 to 10% by weight, preferably 0.1 to 4% by weight, based on the solid content of the matrix forming component. If it is in this range, the curvature of a base material can also be suppressed and the hardness of a transparent film can become high.

The polymerization initiator contains the polymerization initiator. Such a polymerization initiator is used by polymerizing the matrix component and the stress relaxation agent. It remains in a transparent film after superposition | polymerization.

The remaining amount of the polymerization initiator in the transparent film varies depending on the kind, amount of use of the polymerization initiator, the kind of the matrix component, and the like, but a small amount is preferable as much as possible, and the solid content of the matrix component is 20% by weight or less, preferably 10% by weight or less. It is preferable that it is 5 weight% or less. If it exists in this range, it will not affect the color tone of a transparent film.

Although the film thickness of the transparent film which concerns on this invention depends on a use, it is preferable that it is the range of about 10-500 nm, Preferably it is 20-300 nm, especially 50-200 nm.

When the film thickness of a transparent film decreases, antireflection performance, intensity | strength, etc. become insufficient. On the other hand, when the film thickness of the transparent film increases. This deviates from Fresnel's principle, resulting in insufficient anti-reflective performance, resulting in poor contrast, resulting in white on the screen. On the other hand, curvature may arise in base materials, such as a pet film.

The transparent coating part base material which concerns on this invention can be manufactured by apply | coating the said coating film for transparent film formation on a base material, and drying and hardening.

As a coating method, the coating material is applied to a substrate by a known method such as dipping method, spray method, spinner method, roller coating method, bar coating method, gravure printing method, micro gravure printing method, and dried, and in the case of thermosetting resin Is cured and then heat treated, and in the case of ultraviolet curable resin, it may be formed by curing at about 400 mJ / cm 2 of ultraviolet radiation.

Preferably, the transparent coating part substrate of the present invention may be provided with a coating different from the transparent coating on the gap between the substrate and the transparent coating and / or on the transparent coating. On the other hand, the said transparent film can also be provided on the base material on the opposite side to a film.

On the other hand, since the underlayer film of a base material or a transparent film is given anti-glare performance, it is preferable to have unevenness | corrugation on the surface.

Other coatings include conventionally known hard coat films, high refractive index films, conductive films, anti-glare films, infrared ray blocking films and ultraviolet ray blocking films.

The transparent film formed on the substrate using the transparent film-forming coating material according to the present invention has a low refractive index, can have irregularities on the surface as necessary, and thus has excellent anti-reflection performance, anti-glare performance, bright partial contrast, and as necessary. By providing a conductive film, antistatic performance and electromagnetic wave blocking performance can be imparted. Thereby, it is possible to provide the transparent film part base material which can be used suitably for an LCD display, a plasma display, a projection display, an EL display, a CRT display.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples.

(Example 1)

Preparation of antistatic film-forming paint (EC-1)

Γ-methacrylooxypropyl to 100 g of antimony pentoxide fine particle dispersion (manufactured by Catalytic Co., Ltd .; ELCOM V-4560; average particle size 20 nm, Sb ₂ O ₅ concentration 30.5 wt%, dispersion medium: isopropanol, particle refractive index 1.60) 1.88 g of trimethoxysilane (manufactured by Shinwol Silicon Co., Ltd .: KBM-503, 81.2% of SiO ₂ component) was mixed, and 3.1 g of ultrapure water was added thereto, followed by stirring at 50 ° C. for 20 hours to obtain an antimony pentoxide fine particle sol ( Solids 30.5%). 29.51 g of this surface-treated antimony pentoxide microparticles | fine-particles sol, 18.9 g of dihexaerythritol triacetones (DPE-6A made from Kogyo Chemical Co., Ltd.), and 1.6- hexanediol diacrylate (manufactured by Kogyo Chemical Co., Ltd .; light acryl) Photopolymerization initiator (BASF Japan Co., Ltd. make: Luciryl TPO, dissolved in 10% solids concentration in IPA) to 2.1 g of rate 1.6 HX-A) 8.4 g, 20.5 g of isopropanol, and 20.5 g of ethylene glycol monobutyl ether are sufficiently mixed. To prepare an antistatic film-forming paint (EC-1) having a high refractive index hard coat function.

Production of transparent film-forming paint (ARL-1)

Preparation of Surface Treated Low Index Particulate Dispersion (LP-1)

Hollow silica fine particle dispersion (catalytic product manufactured by Co., Ltd .; cataract special product, average particle size 60 nm, solid content 20.5 wt%, IPA dispersion, particle refractive index 1.20) to 100 g of methacryltrimethoxysilane (surface treatment agent A ( Same as below), Shinwol Chemical Co., Ltd .; KBM-503, 81.2% by weight of SiO ₂ component) 2.52 g was added, and the mixture was heated and stirred at 50 ° C. for 15 hours to give a low refractive index fine particle dispersion (LP-) having a solid content concentration of 22.5% by weight. 1) was prepared. The refractive index of the surface treated low refractive index fine particles obtained was 1.24 and the average particle size was 60 nm.

4.74 g of a silicone-based resin (silicone-based resin A (the same), manufactured by Shinwol Chemical Co., Ltd .; X-12-2400, solids concentration of 28.5 wt%) and 6.67 g of a low-refractive index fine particle dispersion (LP-1) surface-treated 0.3 g of acrylic resin 1,6-hexanediol diacrylate (manufactured by Kogyo Chemical Co., Ltd .; light acrylate 1.6 HX-A (stress release agent a (the same)) and photopolymerization initiator (BASF Japan Co., Ltd.) : Lucirin TPO: dissolved in 10% by weight of solid content in IPA (polymerization initiator ap), 0.9 g, isopropyl alcohol 58.24 g, methyl isobutyl ketone 15 g, isopropyl glycol 9 g, ethylene glycol monobutyl ether 5 g (Mixed solvent a) was mixed to prepare a transparent film-forming coating material (ARF-1) having a solid content concentration of 3.0% by weight.

Preparation of transparent coating part base material (ARF-1)

The antistatic film-forming paint (EC-1) was applied to a TAC film (thickness 80 μm) by the bar coat method (# 10), dried at 80 ° C. for 120 seconds, and then cured by irradiation with 600 mJ / cm 2 ultraviolet ray. A protective film was formed. The film thickness of the antistatic film was 3 m.

Subsequently, the transparent film-forming coating material (ARL-1) was applied by a bar coat method (# 4) and baked at 80 ° C. for 120 seconds, followed by irradiation with 600 mJ / cm 2 ultraviolet ray to harden the transparent film part substrate (ARF- 1) was produced. At this time, the film thickness of the transparent film was 100 nm.

The surface resistance of the obtained transparent coating part base material (ARF-1) was measured with the surface resistance meter (The Mitsubishi Chemical Corporation make: Hirestar), and the result is shown in Table 1. On the other hand, a part of transparent film was cut | disconnected perpendicularly and the average film thickness was measured about the cross section using the laser microscope (Kiens Corporation: VE-3000).

All light transmittances and phases were measured by the phase meter (1325A of Nippon Color Corporation), and the results are shown in Table 1.

Reflectance and integrated reflectance were measured with a spectrophotometer (manufactured by Japan Spectrometer, Inc .: U-vest), and the results showing the bottom reflectance at a wavelength of 400 to 700 nm are shown in Table 1.

Preferably, pencil hardness, scratch resistance and adhesiveness were evaluated by the following methods and permit criteria, and the results are shown in Table 1.

Measurement of pencil hardness

It measured by the pencil hardness tester according to JIS-K-5400.

Measurement of scratch resistance

The surface of the membrane was visually observed by scratching 10 times under a load of 500 g / cm 2 using # 0000 steel wool, and evaluated according to the following criteria.

Evaluation standard:

Cotton wound not recognized: ◎

Little scratches on the cotton: ○

Many wounds are recognized on the surface: △

Cotton is totally damaged: ×

Adhesion Measurement

It measured by the pencil hardness tester according to JIS-K-5400.

(Example 2)

Production of transparent film-forming paint (ARL-2)

Preparation of Surface Treated Low Index Particulate Dispersion (LP-2)

(Gamma) -methacrylooxypropyl trimethoxysilane in 100 g of hollow silica fine particle dispersion (catalyst made by Co., Ltd .; cataract special product, average particle size 60 nm, solid content 20.5 weight%, IPA dispersion, particle refractive index 1.20) (Surface treatment agent A, product of Shinwol Chemical Co., Ltd .; KBM-503, 81.2 wt% of SiO ₂ component) 1.26 g was added thereto, followed by heating and stirring at 50 ° C. for 15 hours to obtain a surface-treated low refractive index fine particle dispersion having a solid content concentration of 21.5 wt% (LP -2) was prepared. The refractive index of the surface treated low refractive index fine particles obtained was 1.22 and the average particle size was 60 nm.

4.74 g of silicon-based resin (silicone-based resin A, Shin Wol Chemical Co., Ltd .; X-12-2400, solids concentration 28.5 wt%) in 6.98 g of the low refractive index fine particle dispersion (LP-2) surface-treated and acrylic resin 1,6- Hexanediol diacrylate (stress release agent, manufactured by Gong-Sung Chemical Co., Ltd .; Lightacrylate 1.6 HX-A) 0.15 g and reactive silicone oil (Water repellent A, Shinwol Chemical Co .; X-22-174DX, IPA 0.3g and a photopolymerization initiator (BASF Japan Co., Ltd.); Lucirin TPO: dissolved in 10% by weight solids with IPA) 0.9 g, isopropyl alcohol 57.93 g, methyl isobutyl ketone 15 g, isopropyl glycol 7 g, ethylene glycol monobutyl ether 7 g (mixed solvent a) A transparent film-forming paint (ARL-2) having a concentration of 3.0% by weight was prepared.

Preparation of Transparent Film Base Material (ARF-2)

In the same manner as in Example 1, the antistatic film-forming coating material (EC-1) was applied to a TAC film (thickness of 80 μm) by the bar coat method (# 10), dried at 80 ° C. for 120 seconds, and then UV light of 600 mJ / cm 2. Was irradiated to form a cured antistatic film.

Subsequently, the transparent film-forming coating material (ARL-2) was applied by a bar coat method (# 4) and baked at 80 ° C. for 120 seconds, followed by irradiation with 600 mJ / cm 2 ultraviolet ray to cure the transparent film base material (ARF- 2) was produced. At this time, the film thickness of the transparent film was 100 nm.

The surface resistance, total light transmittance, phase, reflectance, integral reflectance, contact angle, film thickness, pencil hardness, scratch resistance and adhesion were measured in the same manner as in Example 1 on the obtained transparent coating part substrate (ARF-2). 1 is shown.

(Example 3)

Production of transparent film-forming paint (ARL-3)

Preparation of Surface Treated Low Index Particulate Dispersion (LP-3)

(Gamma) -methacrylooxypropyl trimethoxysilane in 100 g of hollow silica fine particle dispersion (catalyst made by Co., Ltd .; cataract special product, average particle size 60 nm, solid content 20.5 weight%, IPA dispersion, particle refractive index 1.20) (Surface Treatment A, manufactured by Shinwol Chemical Co., Ltd .; KBM-503, 81.2 wt% of SiO ₂ component) 5.05 g was added thereto, followed by heating and stirring at 50 ° C. for 15 hours to obtain a surface treated low refractive index fine particle dispersion (LP-) having a solid content of 24.6 wt%. 3) was prepared. The refractive index of the surface treated low refractive index fine particles obtained was 1.28 and the average particle size was 60 nm.

4.74 g of silicone resin (silicone resin A, Shin Wol Chemical Co., Ltd .; X-12-2400, solid content concentration 28.5 weight%) and 6.1 g of acrylic resin tripropylene in this surface-treated low refractive index microparticle dispersion (LP-3) Dimethyl acrylate (stress release agent b, Dong-A Synthetic Co., Ltd .; Aronikkusu M-220) 0.15 g and reactive silicone oil (water repellent a, Shinwol Chemical Co .; X-22-174DX, IPA 0.3 g and a photopolymerization initiator (BASF Japan Co., Ltd.); Lucirin TPO: dissolved in 10% by weight solids with IPA) 0.9 g, isopropyl alcohol 58.81 g, methyl isobutyl ketone 15 g, isopropyl glycol 9 g, ethylene glycol monobutyl ether 5 g (mixed solvent a) A transparent film-forming paint (ARL-3) having a concentration of 3.0% by weight was prepared.

Preparation of transparent coating part base material (ARF-3)

In the same manner as in Example 1, the antistatic film-forming coating material (EC-1) was applied to a TAC film (thickness of 80 μm) by the bar coat method (# 10), dried at 80 ° C. for 120 seconds, and then UV light of 600 mJ / cm 2. Was irradiated to form a cured antistatic film.

Subsequently, a transparent film-forming coating material (ARL-3) was applied by a bar coat method (# 4) and fired at 80 ° C. for 120 seconds, followed by irradiation with 600 mJ / cm 2 ultraviolet ray to harden the transparent coating part substrate (ARF-3). ) Was produced. At this time, the film thickness of the transparent film was 100 nm.

The surface resistance, total light transmittance, phase, reflectance, integral reflectance, contact angle, film thickness, pencil hardness, scratch resistance and adhesion were measured in the same manner as in Example 1 on the obtained transparent coating part substrate (ARF-3). 1 is shown.

(Example 4)

Production of transparent film-forming paint (ARL-4)

2.21 g of a silicone-based resin (silicone-based resin A, manufactured by Shinwol Chemical Co., Ltd .; X-12-2400, solids concentration of 28.5 wt%) and acrylic resin in 1.33 g of the low refractive index fine particle dispersion (LP-1) prepared in the same manner as in Example 1 Resin tripropylene diacrylate (stress release agent b, Dong-A Synthetic Co., Ltd .; Aronikkusu M-220) 0.07 g and reactive silicone oil (water repellent b, Shinwol Chemical Co .; X-22-2426, IPA 0.28 g and a photopolymerization initiator (BASF Japan Co., Ltd.); Lucirin TPO: dissolved in 10% by weight solids with IPA) 0.7 g, isopropyl alcohol 66.41 g, methyl isobutyl ketone 15 g, isopropyl glycol 9 g, and ethylene glycol monobutyl ether 5 g (mixed solvent a) A transparent film-forming paint (ARL-4) having a concentration of 1.0% by weight was prepared.

Preparation of Transparent Film Base Material (ARF-4)

In the same manner as in Example 1, the antistatic film-forming coating material (EC-1) was applied to a TAC film (thickness of 80 μm) by the bar coat method (# 10), dried at 80 ° C. for 120 seconds, and then UV light of 600 mJ / cm 2. Was irradiated to form a cured antistatic film.

Subsequently, a transparent film-forming coating material (ARL-3) was applied by a bar coat method (# 4), fired at 80 ° C. for 120 seconds, and then cured by irradiating 600 mJ / cm 2 ultraviolet ray (ARF-). 4) was produced. At this time, the film thickness of the transparent film was 100 nm.

The surface resistance, total light transmittance, phase, reflectance, integral reflectance, contact angle, film thickness, pencil hardness, scratch resistance and adhesion were measured in the same manner as in Example 1 on the obtained transparent coating part substrate (ARF-4). 1 is shown.

(Example 5)

Production of transparent film-forming paint (ARL-5)

4.74 g of a silicone-based resin (Shinwol Chemical Co., Ltd .; X-12-2400, solids concentration 28.5 wt%) and 15.56 g of the low refractive index fine particle dispersion (LP-1) prepared in the same manner as in Example 1 and 1.6-hexane of the acrylic resin 0.15 g of diol diacrylate (stress release agent, manufactured by Kogongsa Chemical Co., Ltd .; light acrylate 1.6 HX-A) and reactive silicone oil (water repellent b, Shinwol Chemical Co .; X-22-2426, IPA 0.3 g and a photopolymerization initiator (BASF Japan Co., Ltd.); Lucirin TPO: dissolved in 10% by weight solids with IPA) 0.45 g, isopropyl alcohol 50.25 g, methyl isobutyl ketone 15 g, isopropyl glycol 9 g, and ethylene glycol monobutyl ether 5 g (mixed solvent a) A transparent film-forming paint (ARL-5) having a concentration of 5.0 wt% was prepared.

Preparation of transparent coating base material (ARF-5)

In the same manner as in Example 1, the antistatic film-forming coating material (EC-1) was applied to a TAC film (thickness of 80 μm) by the bar coat method (# 10), dried at 80 ° C. for 120 seconds, and then UV light of 600 mJ / cm 2. Was irradiated to form a cured antistatic film.

Subsequently, the transparent film-forming coating material (ARL-5) was applied by a bar coat method (# 4) and baked at 80 ° C. for 120 seconds, followed by irradiation with 600 mJ / cm 2 ultraviolet ray to harden the transparent film part substrate (ARF-5). ) Was produced. At this time, the film thickness of the transparent film was 100 nm.

The surface resistance, total light transmittance, phase, reflectance, integral reflectance, contact angle, film thickness, pencil hardness, scratch resistance and adhesion were measured in the same manner as in Example 1 on the obtained transparent coating part substrate (ARF-5). 1 is shown.

(Example 6)

Production of transparent film-forming paint (ARL-6)

A transparent film-forming paint (ARL-5) was prepared in the same manner as in Example 1 except that 0.3 g of the reactive silicone oil for a water repellent was changed to 0.3 g of isopropyl alcohol.

Preparation of transparent film base material (ARF-6)

In the same manner as in Example 1, the antistatic film-forming coating material (EC-1) was applied to a TAC film (thickness of 80 μm) by the bar coat method (# 10) and dried at 80 ° C. for 120 seconds, followed by a 600 mJ / cm 2 ruler. The ultraviolet ray was irradiated to form a cured antistatic film.

Subsequently, a transparent film-forming coating material (ARL-6) was applied by a bar coat method (# 4) and fired at 80 ° C. for 120 seconds, followed by irradiation with 600 mJ / cm 2 ultraviolet ray to harden the transparent coating part substrate (ARF-6). ) Was produced. At this time, the film thickness of the transparent film was 100 nm.

The surface resistance, total light transmittance, phase, reflectance, integral reflectance, contact angle, film thickness, pencil hardness, scratch resistance and adhesion were measured in the same manner as in Example 1 on the obtained transparent coating part substrate (ARF-6). 1 is shown.

(Example 7)

Production of transparent film-forming paint (ARL-7)

A transparent film-forming coating material (ARL-7) was prepared in the same manner as in Example 1 except that 0.15 g of the stress relieving acrylic resin was changed to 0.15 g of isopropyl alcohol.

Preparation of transparent film base material (ARF-7)

In the same manner as in Example 1, the antistatic film-forming coating material (EC-1) was applied to a TAC film (thickness of 80 μm) by the bar coat method (# 10), dried at 80 ° C. for 120 seconds, and then UV light of 600 mJ / cm 2. Was irradiated to form a cured antistatic film.

Subsequently, a transparent film-forming coating material (ARL-7) was applied by a bar coat method (# 4) and baked at 80 ° C. for 120 seconds, followed by irradiation with 600 mJ / cm 2 ultraviolet ray to harden the transparent coating part substrate (ARF-7). ) Was produced. At this time, the film thickness of the transparent film was 100 nm.

On the obtained transparent film base material (ARF-7), the surface resistance, total light transmittance, phase, reflectance, integral reflectance, contact angle, film thickness, pencil hardness, scratch resistance and adhesion were measured in the same manner as in Example 1. 1 is shown.

(Example 8)

Production of transparent film-forming paint (ARL-8)

A transparent film-forming paint (ARL-8) was prepared in the same manner as in Example 1 except that 0.3 g of a reactive silicone oil for a water repellent and 0.15 of an acrylic resin for a stress relieving agent were changed to 0.45 g of isopropyl alcohol. .

Preparation of transparent film base material (ARF-8)

In the same manner as in Example 1, the antistatic film-forming coating material (EC-1) was applied to a TAC film (thickness of 80 μm) by the bar coat method (# 10), dried at 80 ° C. for 120 seconds, and then UV light of 600 mJ / cm 2. Was irradiated to form a cured antistatic film.

Subsequently, the transparent film-forming coating material (ARL-8) was applied by a bar coat method (# 4) and baked at 80 ° C. for 120 seconds, followed by irradiation with 600 mJ / cm 2 ultraviolet ray to cure the cured transparent base material (ARF- 7) was produced. At this time, the film thickness of the transparent film was 100 nm.

The surface resistance, total light transmittance, phase, reflectance, integral reflectance, contact angle, film thickness, pencil hardness, scratch resistance and adhesion were measured in the same manner as in Example 1 with respect to the obtained transparent coating part substrate (ARF-8). 1 is shown.

(Example 9)

Preparation of Surface Treated Low Index Particulate Dispersion (LP-4)

Γ-acrylooxypropyltrimethoxysilane (100 g of hollow silica fine particle dispersion (manufactured by Catalytic Co., Ltd .; cataract special product, average particle size 60 nm, solid content 20% by weight, IPA dispersion, particle refractive index 1.20)) 2.52 g of surface treatment agent B, Shinwol Chemical Co., Ltd .; KBM-5103, 81.2 wt% of SiO ₂ component) was added thereto, and the mixture was heated and stirred at 50 ° C. for 15 hours to give a low refractive index fine particle dispersion (LP-4) having a solid content of 22.5 wt%. ) Was prepared. The refractive index of the surface treated low refractive index fine particles obtained was 1.24 and the average particle size was 60 nm.

Preparation of Transparent Film-forming Paint (ARL-9)

1.35 g of acrylic resin dipentaerythritol hexane acrylate (matrix-forming component, manufactured by Kogyo Chemical Co., Ltd .; DPE-6A) and 6.66 g of acrylic resin 1.6-hexanediol di in 6.66 g of surface-treated low refractive index fine particle dispersion (LP-4) 0.15 g of acrylate (Stress Relief A, Co., Ltd .; Light Acrylate 1.6-HX-A) and reactive silicone oil (Water repellent a, Shinwol Chemical Co .; X-22-174DX, IPA 0.3 g and photopolymerization initiator (BASF Japan Co., Ltd. make: Lucirin TPO: dissolved in 10% by weight solid content with toluene) 0.6 g (Tivas Fushariti Co., Ltd.) Solid content concentration 3.0 by mixing 0.3 g of isopropyl alcohol, 60.64 g of isopropyl alcohol, 10 g of methyl isobutyl ketone, 10 g of propylene glycol monopropyl ether, and 10 g of ethylene glycol monobutyl ether, dissolved in toluene. A wt% transparent film-forming paint (ARL-9) was prepared.

Preparation of transparent film base material (ARF-9)

In the same manner as in Example 1, the antistatic film-forming coating material (EC-1) was applied to a TAC film (thickness of 80 μm) by the bar coat method (# 10), dried at 80 ° C. for 120 seconds, and then UV light of 600 mJ / cm 2. Was irradiated to form a cured antistatic film.

Subsequently, a transparent film-forming coating material (ARL-9) was applied by a bar coat method (# 4), fired at 80 ° C. for 120 seconds, and then cured by irradiating 600 mJ / cm 2 ultraviolet ray (ARF-9). ) Was produced. At this time, the film thickness of the transparent film was 100 nm.

The obtained transparent coating part base material (ARF-9) was measured in the same manner as in Example 1 by measuring the surface resistance, total light transmittance, phase, reflectance, integral reflectance, contact angle, film thickness, pencil hardness, scratch resistance and adhesion. 1 is shown.

(Example 10)

Preparation of Coating Liquid (AG-1) for Underlayer Film Formation

40 g of silica fine particles (catalyzed by Co., Ltd .: silica microbead P-400, average particle size of 1.5 μm) were dispersed in 160 g of water / methanol = 1: 1 mixed solvent, and methacryltrimethoxysilane (Shinwol Chemical) 0.73 g of KBM-503 Co., Ltd. was added thereto, and the resulting mixture was separated by heating and stirring at 50 ° C. for 15 hours to obtain surface-treated silica fine particles dried at 100 ° C.

Subsequently, 1 g of silica fine particles surface-treated on 9 g of dipentaerythryl hexaacrylate (Co., Ltd .: Lightacrylate DPE-6A) and 0.36 g of a photoinitiator (Tiba Specialty Chemicals: Ilgacua 184) and 2- 39.64 g of propanol / propylene glycol monoethyl ether = 9/1 were added and dispersed in an ultrasonic disperser for 15 minutes to obtain a coating solution for forming an underlayer film (AG-1) having anti-glare property.

Fabrication of Underlayer Membrane Substrate (AGF-1)

The coating liquid for forming an underlayer film (AG-1) was applied to a TAC film (thickness 80 μm) by a bar coat method (# 8), dried at 80 ° C. for 120 seconds, and then cured by irradiation with 600 mJ / cm 2 ultraviolet ray. An underlayer film substrate (AGF-1) having irregularities on the surface was formed.

The height of the average thickness, the convex portion with the (T _1): The lower layer film portion base (AGF-1) laser microscope (VE-3000 Keyence Co., Ltd.) for a portion of the film with respect to the cut perpendicular to the film cross-section on , The height (T ₂ ) of the recessed part was measured and the results are shown in Table 1.

Preparation of transparent film base material (ARF-10)

A transparent film-forming coating material (ARL-1) prepared in the same manner as in Example 1 was applied on the lower layer film base material (AGF-1) by the bar coat method (# 3) so that the average film thickness of the transparent film was 100 nm. After drying at 80 ° C. for 120 seconds, an ultraviolet ray of 600 mJ / cm 2 was irradiated to prepare a cured transparent coating substrate (ARF-10).

The average film thickness, the height of the convex portion (T ₃ ) and the height of the concave portion (T ₄ ) of the obtained transparent coating part substrate (ARF-10) were measured by the above method, and the results are shown in Table 1.

In the same manner as in Example 1, surface resistance, total light transmittance, phase, reflectance, integral reflectance, pencil hardness, scratch resistance, adhesion, and anti-glare were measured, and the results are shown in Table 1.

Anti-glare measure

The coated surface was blackened with a gloss-free black spray and visually observed the reflected light of fluorescent light at 1 m away.

Evaluation standard:

Fluorescent light is not visible at all: ◎

Fluorescent light slightly visible: ○

Fluorescent light is visible, but the outline is blurry: △

Fluorescent light is clearly visible: ×

(Example 11)

Preparation of transparent film base material (ARF-11)

On the lower layer film base material (AGF-1) prepared in the same manner as in Example 10, the bar coating method (ARL-9) prepared in Example 9 was used so that the average film thickness of the transparent film was 100 nm. # 3), dried at 80 ° C. for 120 seconds, and irradiated with 600 mJ / cm 2 ultraviolet ray to prepare a cured transparent coating substrate (ARF-11).

As for Example 10, the surface resistance, total light transmittance, phase, reflectance, integral reflectance, average film thickness, height of concave portion (T ₃ ), and height of concave portion (T ₄ ) were obtained in the same manner as in Example 10. ), Pencil hardness, scratch resistance, adhesion and anti-glare were measured and the results are shown in Table 1.

(Comparative Example 1)

Production of transparent film-forming paint (ARL-R1)

Hollow silica fine particle dispersion (catalytic product manufactured by Co., Ltd .; cataract special product, average particle size 60 nm, solid content 20.5 wt%, IPA dispersion, particle refractive index 1.20) to 7.32 g of silicone resin (silicone resin of matrix forming component, Shinwol Chemical Co., Ltd. make: X-12-2400, solid content concentration 28.5 wt%) 4.74g acrylic resin for stress relief: 1.6-hexanediol diacrylate (stress release agent, manufactured by Kongyoungsa Chemical Co., Ltd .; light acrylic Rate 1.6HX-A) 0.15 g and reactive silicone oil for water repellent (Sinwol Chemical Co., Ltd .; X-22-174DX, dissolved in 10% by weight solid content with IPA) 0.3 g and photopolymerization initiator (BASF Japan Co., Ltd.) My; Lucirin TPO: dissolved in 10% by weight solids with IPA) 0.9 g, isopropyl alcohol 58.89 g, methyl isobutyl ketone 15 g, isopropyl glycol 9 g, ethylene glycol monobutyl ether 5 g, solids concentration 3.0% by weight The transparent coating film for coating (ARL-R1) was produced.

Preparation of transparent film base material (ARF-R1)

In the same manner as in Example 1, the antistatic film-forming coating material (EC-1) was applied to a TAC film (thickness of 80 μm) by the bar coat method (# 10), dried at 80 ° C. for 120 seconds, and then UV light of 600 mJ / cm 2. Was irradiated to form a cured antistatic film.

Subsequently, the transparent coating film (ARL-R1) was applied by a bar coat method (# 4) and fired at 80 ° C. for 120 seconds, followed by irradiation with 600 mJ / cm 2 ultraviolet ray to harden the transparent coating part substrate (ARF-R1). ) Was produced. At this time, the film thickness of the transparent film was 100 nm.

The surface resistance, total light transmittance, phase, reflectance, integral reflectance, contact angle, film thickness, pencil hardness, scratch resistance and adhesion were measured in the same manner as in Example 1 with respect to the obtained transparent coating part substrate (ARF-R1). 1 is shown.

(Comparative Example 2)

Production of transparent film-forming paint (ARL-R2)

In Comparative Example 1, a transparent film-forming paint (ARL-R2) was prepared in the same manner as in Comparative Example 1 except that 0.3 g of a reactive silicone oil for water repellent and 0.15 g of an acrylic resin for stress relieving agent were changed to 0.45 g of isopropyl alcohol. Prepared.

Preparation of transparent film base material (ARF-R2)

In the same manner as in Example 1, the antistatic film-forming coating material (EC-1) was applied to a TAC film (thickness of 80 μm) by the bar coat method (# 10), dried at 80 ° C. for 120 seconds, and then UV light of 600 mJ / cm 2. Was irradiated to form a cured antistatic film.

Subsequently, a transparent coating film for coating (ARL-R2) was applied by a bar coat method (# 4) and baked at 80 ° C. for 120 seconds, followed by irradiation with 600 mJ / cm 2 ultraviolet ray to cure the cured transparent substrate (ARF- R2) was produced. At this time, the film thickness of the transparent film was 100 nm.

The surface resistance, total light transmittance, phase, reflectance, integral reflectance, contact angle, film thickness, pencil hardness, scratch resistance and adhesion were measured in the same manner as in Example 1 with respect to the obtained transparent coating part substrate (ARF-R2). 1 is shown.

(Comparative Example 3)

Production of transparent film-forming paint (ARL-R3)

Acrylic silica resin dihexaerythritol triacetate (surface treatment agent) in 7.32 g of hollow silica fine particle dispersion (product made by Catalytic Co., Ltd .; cataract special product, average particle size 60 nm, solid content 20.5 weight%, IPA dispersion, particle refractive index 1.20) A, Co., Ltd .: DPE-6A) 1.35g and acrylic resin 1.6-hexanediol diacrylate (stress release agent a, Co., Ltd .; Co., Ltd .; light acrylate 1.6HX-A) 0.15g; 0.3 g of reactive silicone oil (Sinwol Chemical Co., Ltd .; X-22-174DX, dissolved in IPA at a solid content concentration of 10% by weight) and a photopolymerization initiator (BASF Japan Co., Ltd.); Lucirin TPO: dissolved in 10% by weight of solid content in toluene) 0.6g, 0.3g of isopropyl alcohol (dissolved in ylcua 184, manufactured by Tivas Fucharity Co., Ltd., dissolved in toluene, solid content of 10% by weight) 59.98 g, methyl isobutyl ketone 10 g, propylene glycol monopropyl ether 10 g, and ethylene glycol monobutyl ether 10 g were mixed (mixed solvent b) to prepare a transparent film-forming paint (ARL-R3) having a solid content concentration of 3.0% by weight.

Preparation of transparent film base material (ARF-R3)

In the same manner as in Example 1, the antistatic film-forming coating material (EC-1) was applied to a TAC film (thickness of 80 μm) by the bar coat method (# 10), dried at 80 ° C. for 120 seconds, and then UV light of 600 mJ / cm 2. Was irradiated to form a cured antistatic film.

Subsequently, the transparent coating film for coating (ARL-R3) was applied by a bar coat method (# 4) and fired at 80 ° C. for 120 seconds, followed by irradiation with 600 mJ / cm 2 ultraviolet ray to harden the transparent coating part substrate (ARF-R3). ) Was produced. At this time, the film thickness of the transparent film was 100 nm.

The surface resistance, total light transmittance, phase, reflectance, integral reflectance, contact angle, film thickness, pencil hardness, scratch resistance and adhesion were measured in the same manner as in Example 1 with respect to the obtained transparent coating part substrate (ARF-R3). 1 is shown.

(Comparative Example 4)

Production of transparent film-forming paint (ARL-R4)

To 6.67 g of the low refractive index fine particle dispersion (LP-1) prepared in the same manner as in Example 1, a polyester-based resin (matrix forming component, polyester, manufactured by Dongyang Bang Co., Ltd.): Vironal MD-1200, solid content concentration of 34 weight %) 4.41 g and reactive silicone oil (water repellent a, Shinwol Chemical Co .; X-22-2426, dissolved in 10% by weight of solids concentration with IPA) 0.3 g and leveling agent (Nambon Chemical Co., Ltd.) Ron NSH-8430HF, solid content concentration 10% by weight) 0.5g, isopropyl alcohol 78.12g, ethylene glycol monoethyl ether 10g was mixed to prepare a transparent film-forming paint (ARL-4R) of 3.0% by weight solids.

Preparation of transparent film base material (ARF-R4)

Subsequently, a transparent film-forming coating material (ARL-4R) was applied by a bar coat method (# 4) and fired at 80 ° C. for 120 seconds, followed by irradiation with 600 mJ / cm 2 ultraviolet ray to harden the transparent coating part substrate (ARF-R3). ) Was produced. At this time, the film thickness of the transparent film was 100 nm.

The surface resistance, total light transmittance, phase, reflectance, integral reflectance, contact angle, film thickness, pencil hardness, scratch resistance and adhesion were measured in the same manner as in Example 1 on the obtained transparent coating part substrate (ARF-4R). 1 is shown.

(Comparative Example 5)

Preparation of transparent film base material (ARF-R5)

In the same manner as in Example 10, a lower layer membrane substrate (AGF-1) was produced. A part of this film 1 was cut | disconnected perpendicularly with respect to this lower layer film part base material (AGF-1), and the average film thickness and the height of a convex part were made using the laser microscope (VE-3000 made from Keyence Corporation) with respect to the cross section of a film. T ₁ ) and the height (T ₂ ) of the recesses were measured, and the results are shown in Table 1.

Subsequently, the transparent film-forming coating material (ARL-R1) prepared in the same manner as in Comparative Example 1 was applied by a bar coat method (# 3) so that the average film thickness of the transparent film was 100 nm, and dried at 80 ° C. for 120 seconds. 600 mJ / cm 2 of ultraviolet light was irradiated to prepare a cured transparent coating substrate (ARF-R5).

With respect to the obtained transparent coating part substrate (ARF-R5), a part of this coating was cut vertically in the same manner as the lower layer coating part substrate (AGF-1), and a laser microscope (VE-3000 manufactured by Keyence Corporation) was applied to the cross section of the coating. The average film thickness, the height of the convex portion (T ₃ ), and the height of the recessed portion (T ₄ ) were measured, and the results are shown in Table 1.

In the same manner as in Example 10, the surface resistance, total light transmittance, phase, reflectance, integral reflectance, average film thickness, height of convex portion (T ₃ ), height of concave portion (T ₄ ), pencil hardness, scratch resistance, adhesion and anti-glare property Was measured and the results are shown in Table 1.

(Comparative Example 6)

Preparation of transparent film base material (ARF-R6)

In the same manner as in Example 10, a lower layer membrane substrate (AGF-1) was produced. A part of this film 1 was cut | disconnected perpendicularly with respect to this lower layer film base material (AGF-1), and the average film thickness and the height of an iron part were made using the laser microscope (VE-3000 made from Keyence Corporation) with respect to the cross section of the film. (T ₁ ) and the height (T ₂ ) of the recesses were measured, and the results are shown in Table 1.

Subsequently, the transparent film-forming coating material (ARL-R3) prepared in Comparative Example 3 was applied by a bar coat method (# 3) so that the average film thickness of the transparent film was 100 nm, dried at 80 ° C. for 120 seconds, and then 600 mJ. Ultraviolet rays of / cm 2 were irradiated to prepare a cured transparent coating substrate (ARF-R6).

With respect to the obtained transparent coating part substrate (ARF-R6), a part of this coating was cut vertically in the same manner as the lower layer coating part substrate (AGF-1), and a laser microscope (VE-3000 manufactured by Keyence Corporation) was applied to the cross section of the coating. The average film thickness, the height of the convex portion (T ₃ ), and the height of the recessed portion (T ₄ ) were measured, and the results are shown in Table 1.

In the same manner as in Example 10, the surface resistance, total light transmittance, phase, reflectance, integral reflectance, average film thickness, height of convex portion (T ₃ ), height of concave portion (T ₄ ), pencil hardness, scratch resistance, adhesion and anti-glare property Was measured and the results are shown in Table 1.

(Comparative Example 7)

Preparation of transparent film base material (ARF-R7)

In the same manner as in Example 10, a lower layer membrane substrate (AGF-1) was produced. A part of this film 1 was cut | disconnected perpendicularly with respect to this lower layer film part base material (AGF-1), and the average film thickness and the height of a convex part were made using the laser microscope (VE-3000 made from Keyence Corporation) with respect to the cross section of a film. T ₁ ) and the height (T ₂ ) of the recesses were measured, and the results are shown in Table 1.

Subsequently, the coating film (ARL-R4) fmf transparent film prepared in Comparative Example 4 was coated with a bar coat method (# 3) so that the average film thickness was 100 nm, dried at 80 ° C. for 120 seconds, and then 600 mJ. Ultraviolet rays of / cm 2 were irradiated to prepare a cured transparent coating substrate (ARF-R7).

With respect to the obtained transparent coating part base material (ARF-R7), a part of this coating was cut vertically in the same manner as the lower layer part base material (AGF-1), and a laser microscope (VE-3000 manufactured by Keyence Corporation) for the cross section of the coating. The average film thickness, the height of the convex portion (T ₃ ), and the height of the recessed portion (T ₄ ) were measured, and the results are shown in Table 1.

In the same manner as in Example 10, the surface resistance, total light transmittance, phase, reflectance, integral reflectance, average film thickness, height of convex portion (T ₃ ), height of concave portion (T ₄ ), pencil hardness, scratch resistance, adhesion and anti-glare property Was measured and the results are shown in Table 1. In addition, □ of surface resistance means inch square.

The effect of the present invention is that it is possible to form a low refractive index transparent film excellent in adhesion to the substrate, strength, water repellency, and whitening resistance, and when the transparent film is formed on a substrate or underlayer film having irregularities on the added surface, It is possible to provide a coating film for forming a transparent film which is capable of forming a transparent film having the same unevenness as the unevenness of the lower part by flattening the surface. On the other hand, the transparent film formed on the substrate using the transparent film-forming paint has a low refractive index, and can have irregularities on the surface as necessary, and thus have excellent anti-reflection performance, anti-glare performance, and bright partial contrast, and thereby LCD display. It is possible to provide a transparent coating part base material which can be suitably used for plasma displays, projection displays, EL displays, CRT displays and the like.

Claims (9)

In the paint for forming a transparent film composed of low refractive index fine particles, a matrix forming component, a polymerization initiator and a solvent, (Iii) the low refractive index fine particles are treated with a silane coupling agent, the refractive index of the surface-treated low refractive index fine particles is in the range of 1.20 to 1.45, and the concentration of the low refractive index fine particles is in the range of 0.1 to 10% by weight as solid content, (Ii) The matrix forming component is a silicone resin and / or an acrylic resin, and the concentration of the matrix forming component is in the range of 0.5 to 20% by weight as a solid content. The method of claim 1, wherein the matrix forming component is a resin obtained by polymerizing a trifunctional or higher functional silicone resin monomer as a silicone resin and / or a resin obtained by polymerizing a trifunctional or higher functional acrylic resin monomer as an acrylic resin. varnish The transparent film formation according to claim 2, wherein the matrix forming component is a silicone-based resin having a (meth) acryloyl group and / or an acrylic resin is a (meth) acrylic resin having a (meth) acryloyl group. Paint 4. The matrix forming component according to any one of claims 1 to 3, wherein the matrix-forming component comprises a resin in which a bifunctional or less-functional resin monomer is polymerized, wherein the resin is a silicone-based resin having a (meth) acryloyl group, Paint for forming a transparent film, which is at least one resin selected from a fluororesin having a (meth) acryloyl group, a long chain acrylic resin having a (meth) acryloyl group, and a siloxane-based acrylic resin. The said transparent film formation paint is a bifunctional and / or trifunctional acrylic resin monomer in any one of Claims 1-4, and (ii) The matrix is acrylic resin In the case of the coating material for transparent film formation, characterized in that it further comprises an acrylic resin polymerized with a bifunctional acrylic resin monomer each as a stress relaxation agent The paint for forming a transparent film according to any one of claims 1 to 5, wherein the polymerization initiator comprises a phosphine-based polymerization initiator or a cation-based photopolymerization initiator. The solvent according to any one of claims 1 to 6, wherein the solvent is a mixed solvent of a solvent (A) having a boiling point of 50 to 100 ° C. and a solvent (B) having a boiling point of 100 to 200 ° C. The content of the solvent (A) is in the range of 50 to 90% by weight, and the content of the solvent (B) is in the range of 10 to 50% by weight. 8. The silane coupling agent according to any one of claims 1 to 7, wherein the low refractive index fine particles are surface-treated with a selected from (meth) acryloyl group, epoxy group (glycid group), urethane group, amino group, fluorine group. A paint for forming a transparent film, which is a silane coupling agent having at least one functional group. The transparent coating part base material which consists of a transparent film formed on the base material using the coating material for transparent film formation of any one of Claims 1-8.