JPH11140207A - Production of hard coat film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject film having high hardness and capable expressing excellent abrasion resistance, excellent transparency, and the like by forming a coating film containing an organic silicon compound, an epoxy group- containing compound, and metal compound particles in a specific ratio as essential components. SOLUTION: This method for producing a hard coat film comprises dissolving and dispersing (A) an organic silicon compound of the formula [R<1> and R<2> are each an alkyl, an alkenyl, an aryl, a halogen or the like; R<3> is a hydrolyzable group; (a) and (b) are each 0 or 1] and/or its hydrolysate, (B) an epoxy group-containing compound, and (C) metal compound particles (preferably antimony pentoxide) as essential components in a component A/component B ratio of 1/3 to 2/1 and in a component B/component C ratio of 2/3 to 3/1 in a solvent containing an aprotic polar solvent in an amount of 3-35 wt.% based on the total solvent and subsequently forming the hard coat film from the solution or dispersion. The component A includes tetraalkoxysilanes such as methyl silicate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hard coat film having high hardness and excellent abrasion resistance, transparency, chemical resistance, adhesion and the like, particularly, polycarbonate films, sheets, lenses and resin members. For example, front filters and covers for flat displays such as cathode ray tubes (CRTs), LCDs, PDPs, and ELs, and cover cases,
The present invention relates to a method for producing a hard coat film widely used for optical lenses, spectacle lenses, window shields, light covers, helmet shields, and the like.

[0002]

2. Description of the Related Art Plastic molded articles have various advantages such as being lightweight and excellent in impact resistance as compared with glass products, and being inexpensive and easy to mold. Widely used for optical related applications. However, these plastic molded articles have a drawback that the surface is easily damaged due to insufficient wear resistance of the surface.

Hitherto, many proposals have been made to solve these drawbacks, such as thermosetting cross-linked coated articles and photopolymerizable coated articles. Among them, a hard coat technology having a high refractive index and a high hardness is disclosed in JP-A-62-899.
In JP-A-02, a transparent molded article having a thermosetting film composed of an organic silane compound, a polyfunctional epoxy compound, a curing agent and antimony oxide sol fine particles is proposed. However, this thermosetting coating has a drawback that adhesion reproducibility is poor with respect to polycarbonate.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks of the prior art, and particularly to a high-hardness, abrasion-resistant and adhesive film which is applied to polycarbonate. An object of the present invention is to provide a method for producing a hard coat film having good reproducibility.

[0005]

The present invention has the following arrangement to achieve the above object.

That is, the method for producing a hard coat film according to the present invention comprises an organosilicon compound represented by the following general formula (I) and / or a hydrolyzate thereof (component A), a compound having an epoxy group (component B) and In a method for producing a hard coat film for polycarbonate comprising metal compound fine particles (component C) as an essential component, the ratio of component A / B is 1/3 or more and 2/1 or less, and the ratio of component B / C is 1/2
At a ratio of at least 3/1, the A component, B component and C component are mixed with the aprotic polar solvent in an amount of 3% by weight to 35% of the total solvent.
It is characterized in that a film is formed by dissolving and dispersing in a solvent of not more than wt%.

[0007] ^{R 1 aR 2 bSi (OR 3} ) 4- a - b (I) ( In the formula, R ¹ and R ² are each an alkyl group, an alkenyl group, an aryl group, a halogen group, an epoxy group, glycidoxy group,
It is at least one selected from an amino group, a mercapto group, a methacryloxy group and a hydrocarbon group having a cyano group, and R ¹ and R ² may be the same or different. R ³ is a hydrolyzable group, and a and b are 0 or 1. ) The present invention further includes the following preferred embodiments.

(1) The metal compound fine particles (C component)
Antimony pentoxide, zinc antimonate, titanium oxide, composite oxide with cerium oxide / titanium oxide, tin oxide, indium oxide (including indium oxide / tin composite oxide),
At least one selected from zirconium oxide and aluminum oxide.

(2) The metal compound fine particles (component C) are antimony pentoxide.

(3) The compound having an epoxy group (component B) is a bisphenol A type epoxy resin.

(4) The aprotic polar solvent is dimethylformamide.

(5) The static contact angle on the surface of the polycarbonate is 98 degrees or less.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described more specifically.

Formula (I) R ¹ aR ² used in the present invention
bSi (OR ³⁾ _4- a _- Specific examples of the organic silicon compound represented by b and / or a hydrolyzate thereof (A component), methyl silicate, ethyl silicate, n- propyl silicate, i- propyl silicate, Tetraalkoxysilanes such as n-butyl silicate, sec-butyl silicate and t-butyl silicate, and hydrolysates thereof, further, methyltrimethoxysilane, methyltriethoxysilane, methyltrimethoxyethoxysilane, methyltriacetoxysilane, methyltriacetoxysilane, methyl Tributoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltriacetoxysilane, vinyltrimethoxyethoxysilane, phenyltrimethoxysilane, phenylto Liethoxysilane, phenyltriacetoxysilane, γ-chloropropyltrimethoxysilane,
γ-chloropropyltriethoxysilane, γ-chloropropyltriacetoxysilane, 3,3,3-trifluoropropyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, γ-aminopropyltrimethoxysilane, γ-aminopropyl Triethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-
Mercaptopropyltriethoxysilane, N-β- (aminoethyl) -γ-aminopropyltrimethoxysilane, β-cyanoethyltriethoxysilane, methyltriphenoxysilane, chloromethyltrimethoxysilane,
Chloromethyltriethoxysilane, glycidoxymethyltrimethoxysilane, glycidoxymethyltriethoxysilane, α-glycidoxyethyltrimethoxysilane,
α-glycidoxyethyltriethoxysilane, β-glycidoxyethyltrimethoxysilane, β-glycidoxyethyltriethoxysilane, α-glycidoxypropyltrimethoxysilane, α-glycidoxypropyltriethoxysilane, β-glycidoxypropyltrimethoxysilane, β-glycidoxypropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ
-Glycidoxypropyltriethoxysilane, γ-glycidoxypropyltripropoxysilane, γ-glycidoxypropyltributoxysilane, γ-glycidoxypropyltrimethoxyethoxysilane, γ-glycidoxypropyltriphenoxysilane, α-glycidoxybutyltrimethoxysilane, α-glycidoxybutyltriethoxysilane, β-glycidoxybutyltrimethoxysilane, β-glycidoxybutyltriethoxysilane, γ
-Glycidoxybutyltrimethoxysilane, γ-glycidoxybutyltriethoxysilane, δ-glycidoxybutyltrimethoxysilane, δ-glycidoxybutyltriethoxysilane, (3,4-epoxycyclohexyl)
Methyltrimethoxysilane, (3,4-epoxycyclohexyl) methyltriethoxysilane, β- (3,4-
Epoxycyclohexyl) ethyltrimethoxysilane,
β- (3,4-epoxycyclohexyl) ethyltriethoxysilane, β- (3,4-epoxycyclohexyl) ethyltripropoxysilane, β- (3,4-epoxycyclohexyl) ethyltributoxysilane, β-
(3,4-epoxycyclohexyl) ethyltrimethoxyethoxysilane, β- (3,4-epoxycyclohexyl) ethyltriphenoxysilane, γ- (3,4-epoxycyclohexyl) propyltrimethoxysilane,
trialkoxysilanes such as γ- (3,4-epoxycyclohexyl) propyltriethoxysilane, δ- (3,4-epoxycyclohexyl) butyltrimethoxysilane, δ- (3,4-epoxycyclohexyl) butyltriethoxysilane, Triacyloxysilane or triphenoxysilane or a hydrolyzate thereof and dimethyldimethoxysilane, phenylmethyldimethoxysilane, dimethyldiethoxysilane, phenylmethyldiethoxysilane, γ-chloropropylmethyldimethoxysilane, γ-chloropropylmethyldiethoxysilane , Dimethyldiacetoxysilane, γ-methacryloxypropylmethyldimethoxysilane, γ-methacryloxypropylmethyldiethoxysilane, γ-mercaptopropylmethyldimethoxysilane , Γ-mercaptopropylmethyldiethoxysilane, γ-aminopropylmethyldimethoxysilane, γ-aminopropylmethyldiethoxysilane, methylvinyldimethoxysilane, methylvinyldiethoxysilane, glycidoxymethylmethyldimethoxysilane, glycidoxymethyl Methyldiethoxysilane, α
-Glycidoxyethylmethyldimethoxysilane, α-glycidoxyethylmethyldiethoxysilane, β-glycidoxyethylmethyldimethoxysilane, β-glycidoxyethylmethyldiethoxysilane, α-glycidoxypropylmethyldimethoxysilane , Α-glycidoxypropylmethyldiethoxysilane, β-glycidoxypropylmethyldimethoxysilane, β-glycidoxypropylmethyldiethoxysilane, γ-glycidoxypropylmethyldimethoxysilane, γ-glycidoxypropylmethyl Diethoxysilane, γ-glycidoxypropylmethyldipropoxysilane, γ-glycidoxypropylmethyldibutoxysilane, γ-glycidoxypropylmethyldimethoxyethoxysilane, γ-glycidoxypropylmethyldiphenoxysilane, γ -Glycidoxypropylethyldimethoxysilane, γ-glycidoxypropylethyldiethoxysilane, γ-glycidoxypropylethyldipropoxysilane, γ-glycidoxypropylvinyldimethoxysilane, γ-glycidoxypropylvinyldiethoxysilane Examples include dialkoxysilanes or diacyloxysilanes such as silane, γ-glycidoxypropylphenyldimethoxysilane, γ-glycidoxypropylphenyldiethoxysilane, and hydrolysates thereof.

These organosilicon compounds can be used alone or in combination of two or more. In particular, for the purpose of imparting adhesion and dyeing properties, use of organosilicon compounds containing an epoxy group and a glycidoxy group is preferred. Is preferred.

These organosilicon compounds are preferably used after being hydrolyzed in order to lower the curing temperature and promote the curing. Hydrolysis is performed by adding an acidic aqueous solution such as pure water or hydrochloric acid, acetic acid or sulfuric acid to the component A,
This is achieved by stirring. Further, in the present invention,
The degree of hydrolysis can be easily controlled by adjusting the amount of pure water or acidic aqueous solution added. At the time of hydrolysis, it is particularly preferable to add pure water or an acidic aqueous solution in an amount equal to or more than 3 moles of the hydrolyzable group of the general formula (I) in terms of acceleration of curing.

Examples of the compound containing an epoxy group (component B) used in the present invention include compounds containing an epoxy group and a glycidoxy group in the organosilane compound and / or its hydrolyzate, and allyl glycidyl group. Ether, glycidyl ethers such as phenyl glycidyl ether, glycidyl ester compounds of polyfunctional carboxylic acids, compounds having an epoxycyclohexyl group, and the like, and known epoxy resins may be mentioned. Preferred examples of the compound include an aromatic ring and / or Examples thereof include a polyfunctional epoxy resin having an aliphatic ring.

Representative examples include the following general formula (II):
Epoxy resins represented by (III) and (IV) can be mentioned.

[0019]

Embedded image (Where R is a glycidyl group, l, m, n1 and n2
Is an integer of 0 to 15).

The epoxy equivalent of the epoxy resins represented by the above general formulas (II), (III) and (IV) is not particularly limited, but from the viewpoint of compatibility with other components and ease of handling.
Those having 400 or less are preferably used. As a more preferred epoxy resin in the present invention, a bisphenol A type epoxy resin can be mentioned from the viewpoint of adhesion and high hardness.

Further, the metal compound fine particles (component (C)) used in the present invention are not particularly limited as long as they do not impair the transparency in the state of a coated film. Sols dispersed in a colloidal state are exemplified. Specifically, antimony pentoxide, zinc antimonate, titanium oxide, a composite oxide of cerium oxide / titanium oxide, tin oxide, indium oxide (indium oxide /
(Including a tin composite oxide), zirconium oxide and aluminum oxide. Of these, antimony pentoxide, tin oxide, and a composite oxide sol of cerium oxide / titanium oxide are particularly preferably used, and among them, antimony pentoxide having high sol stability is particularly preferred.

These metal compound fine particles are generally dispersed in a colloidal state in an organic solvent such as water or alcohol, but an alcohol sol having high sol stability is particularly preferred.

The average particle diameter of these metal compound fine particles is usually 1 to 200 μm, preferably 5 to 1 μm.
Metal compound fine particles having a particle diameter of 00 μm are used. When the average particle diameter exceeds 200 mμ, the transparency of the hard coat film tends to decrease. In the present invention, in order to improve the dispersibility of the metal compound fine particles, various surfactants and dispersants such as amines may be added, or two or more kinds of metal compound fine particles may be used in combination. It is possible.

In order to achieve the object of the present invention, the ratio of component A / component B is not less than 1/3 and not more than 2/1, preferably not more than 1/1.
It is important that the ratio be 2 or more and 1/1 or less. A component / B
If the ratio of the components is less than 1/3, the hardness of the obtained hard coat film tends to decrease, and if it exceeds 2/1, the abrasion resistance tends to decrease. Furthermore, in order to achieve the object of the present invention, the ratio of the component B / C is not less than 2/3 and not more than 3/1, preferably 1 /.
It is important that the ratio be 1 or more and 2/1 or less. B component / C
If the ratio of the components is less than 2/3, the adhesion of the obtained hard coat film tends to decrease, and if it exceeds 3/1, the hardness tends to decrease.

In the practice of the present invention, the components A, B and C are dissolved and dispersed in a solvent mainly composed of an organic component. Here, as the organic component, aliphatic, aromatic alcohols such as methanol, propanol and benzyl alcohol, and glycols such as ethylene glycol,
Esters such as ethyl acetate, ethers such as phenyl cellosolve, ketones such as acetylacetone, aliphatic and aromatic hydrocarbons such as hexane, benzene and toluene, halides such as carbon tetrachloride and chloroform, dimethylformamide, dimethyl Aprotic polar solvents such as sulfoxide and dimethylacetamide. These solvents are generally used as a mixture.

In particular, the object of the present invention is achieved when the aprotic polar solvent is contained in an amount of 3 wt% to 35 wt%, preferably 5 wt% to 25 wt% of the total solvent. When the amount of the aprotic polar solvent is less than 3% by weight of the total solvent, the adhesion tends to be poor, and when the amount is more than 35% by weight, the polycarbonate base material is damaged or the drying speed of the solvent is reduced to affect the production efficiency. give. In the present invention, when the aprotic polar solvent is dimethylformamide, reproducibility of adhesiveness is high, and it is particularly preferable.

The solvent other than the aprotic solvent is selected from the viewpoint of solubility, boiling point and evaporation rate so as to obtain a uniform coating without attacking the substrate.

In the present invention, other components such as a curing agent necessary for accelerating the curing of the resin component can be blended. The curing agent used is not particularly limited as long as it can cure the A component and the B component.
If it is a metal compound, from the viewpoints of curing speed, coloring property of the coating film, weather resistance, etc., a metal compound containing at least one metal selected from alkaline earth, group II, group III and transition metal is preferable, and For these, alkoxides, chelate compounds, and metal perhalate compounds of these metals are used. As the metal alkoxide, an alkoxide composed of a linear or branched C _{1 to} C ₈ saturated hydrocarbon can be suitably used in terms of stability and solubility.

Specific examples thereof include tetraisopropyl titanate, tetranormal butyl titanate, zirconium n-propoxide, zirconium n-butoxide, magnesium ethoxide, aluminum iso-
Propoxide and the like can be mentioned. Al, Cr, Cu, Mg, Zr, Ti, M
and acetylacetone metal salts such as n, and ethyl acetoacetate metal salts. Examples of the metal perhalogenate compound include metal perchlorate compounds such as Ca, Ni, Ba, Mg, Mn, and Sr, and metal periodate compounds. These metal compounds can be used as a mixture of two or more kinds. Among these curing agents, for the purpose of the present invention, metal chelate compounds can be suitably used,
In particular, the following aluminum chelate compounds are useful from the viewpoint of the stability of the paint and the presence or absence of coloring of the coating film after coating.

The aluminum chelate compound referred to herein is, for example, an aluminum chelate compound represented by the general formula: Al Xn Y _3- n.

In the formula, X is an OL (L is a lower alkyl group), and Y is a coordination derived from a compound represented by the general formula M ¹ COCH ₂ COM ² (M ¹ and M ² are both lower alkyl groups). And at least one ligand derived from a compound represented by the general formula M ³ COCH ₂ COOM ⁴ (M ³ and M ⁴ are both lower alkyl groups).
Or 2.

As the aluminum chelate compound represented by the above general formula, various compounds may be mentioned. From the viewpoints of solubility in the composition, stability and effect as a curing catalyst, aluminum acetyl is particularly preferable. Acetonate, aluminum bisethyl acetoacetate monoacetylacetonate, aluminum-di-n-butoxide-monoethylacetoacetate and aluminum-di-iso-propoxide-monomethylacetoacetate. These can be used as a mixture of two or more kinds.

The amount of the metal chelate compound added is A
It is preferable to use the component and the component B in the range of 0.2 to 20%. If the addition amount is 0.2% or less, the effect is small, and if it is 20% or more, the efficiency is poor and coloring is likely. More preferably, it can be used between 0.5 and 15%.

In the present invention, for stabilizing the composition, it is also useful to add 0.01 mol or more, more preferably 0.1 mol or more, of the polydentate compound to 1 mol of the aluminum chelate compound. It is. A polydentate compound is a compound having two or more coordination atoms that are directly bonded to a central atom (transition metal or non-transition metal) during complex formation. Specific examples of such compounds include diketones such as acetylacetone; ketoesters such as methyl acetoacetate and ethyl acetoacetate; ketoalcohols such as salicylaldehyde; dicarboxylic acids such as oxalic acid;
And cyclic amines such as -2'-pipyridine and 1,10-phenanthroline.

The curing agent used in the present invention may be used in combination with various other curing agents for the purpose of accelerating curing and curing at a low temperature. These include latent curing agents such as amines, imidazoles, acid anhydrides, mercaptans, and dicyandiamide, various epoxy resin curing agents such as cationic initiators, and various organic silicon resin curing agents.

The hard coat film of the present invention is suitably used for a molded article of polycarbonate. The polycarbonate used in the present invention has a surface static contact angle of preferably 98 degrees or less, more preferably 95 degrees or less. When the static contact angle exceeds 98 degrees, the adhesiveness of the hard coat film tends to decrease. Further, the shape of the polycarbonate molded article may be a film shape, a sheet shape, a lens shape, a resin member shape, or the like.

The hard coat film of the present invention can be formed by a dipping method, a spin coating method, a gravure printing method, a die coating method,
It is applied by a commonly used solution coating method such as a reverse coating method, and is formed by drying a solvent and, if necessary, a curing reaction treatment.

The hard coat film and the hard coat article obtained by the present invention can be suitably used especially as an optical material because they have high hardness, abrasion resistance, transparency and chemical resistance. The main applications are front plates of various displays such as cathode ray tubes, flat displays (laser displays, photochromic displays, electrochromic displays, liquid crystal displays, plasma displays, light emitting diode displays, electroluminescent panels) and the like. It is also used as an input device part. In addition, it can be widely used for a front cover such as a cover case, an optical lens, a spectacle lens, a window shield, a light cover, a helmet shield and the like.

Examples will be described below to clarify the gist of the present invention, but the present invention is not limited to these examples.

[0040]

EXAMPLES (Example 1) (1) Preparation of thermosetting composition (a) Preparation of γ-glycidoxypropyltrimethoxysilane hydrolyzate γ-glycidoxy was placed in a reactor equipped with a rotor. 75 g of propyltrimethoxysilane was charged, the solution temperature was maintained at 10 ° C., and the solution was stirred for 0.01 while being stirred with a magnetic stirrer.
17.2 g of a normal aqueous hydrochloric acid solution was gradually added dropwise. After dropping, cooling was stopped to obtain a hydrolyzate of γ-glycidoxypropyltrimethoxysilane.

(B) Preparation of paint 15 g of benzyl alcohol was added to the silane hydrolyzate.
35 g of n-propanol, dimethylformamide 20
g, silicone surfactant 0.5 g, bisphenol A type epoxy resin (trade name, manufactured by Yuka Shell Epoxy Co., Ltd.)
80 g of Epicoat 827) were added and mixed, and 220 g of colloidal antimony pentoxide sol (trade name: Sun Colloid AMT-135, manufactured by Nissan Chemical Industries, Inc., average particle diameter: 30 mμ, solid content: 35 wt% in methanol), 8.0 g of aluminum acetylacetonate Was added and stirred sufficiently to obtain a thermosetting composition.

(C) Properties of the thermosetting composition The obtained thermosetting composition had a pH of 5.5 and a viscosity of 3 centipoise.

(2) Preparation of Hard Coat Film The coating composition prepared in (1) above was dipped in a resin to be coated on a polycarbonate substrate having a thickness of 1.5 mm and a static contact angle of 93 ° at a pulling rate of 10 cm / min. Coating was performed, followed by preliminary curing at 82 ° C. for 12 minutes, and further heating at 130 ° C. for 3 hours to obtain a hard coat film.

(3) Performance Evaluation In order to examine the performance of the obtained hard coat film, a test was performed according to the following test method. The results are shown in Table 1.

(A) Steel Wool (SW) The coated surface is rubbed with steel wool having a hardness of # 0000 with five reciprocations to determine the degree of damage. The criteria are as follows.

A: No damage even if strongly rubbed B: Slightly damaged when rubbed fairly strongly C: Scratched even with slight friction (b) Adhesion 100 pieces were inserted from above the coating film with a steel knife, and a cellophane adhesive tape (trade name "Cellotape", a product of Nichiban Co., Ltd.) was strongly adhered to the coating film, and quickly peeled off in a 90-degree direction to check for peeling of the coating film.

(C) Transparency The transparency of the obtained plastic molded product was visually observed. The criteria are as follows.

Δ: no fogging is observed even when intense light is applied. Δ: fogging is observed when intense light is applied. X: fogging is observed without intense light. (Example 2) γ of Example 1 -Instead of the hydrolyzate of glycidoxypropyltrimethoxysilane, 17.2 g of vinyltriethoxysilane and methyltrimethoxysilane 2
To 6.8 g, 15.6 g of a 0.05 N hydrochloric acid aqueous solution was gradually added while stirring with a magnetic stirrer.
Hydrolysis was obtained at 0 ° C. for 30 minutes. Colloidal antimony pentoxide sol (San Colloid AM, manufactured by Nissan Chemical Industries, Ltd.)
T-135 A thermosetting composition was prepared in the same procedure as in Example 1 except that 120 g of an average particle diameter of 30 mμ and a solid content concentration of 35 wt% in methanol was used, and a hard coat film was prepared. The results are shown in Table 1.

Example 3 Instead of the colloidal antimony pentoxide sol in the thermosetting composition of Example 1, colloidal zinc antimonate (Cernax CX-Z300M-1F, trade name, manufactured by Nissan Chemical Industries, average particle size) A thermosetting composition was prepared in the same procedure as in Example 1 except that 257 g of a diameter of 30 mμ and a solid content concentration of 30 wt% in methanol was added.
A hard coat film was produced. The results are shown in Table 1.

Example 4 A thermosetting composition was prepared in the same procedure as in Example 1 except that the amount of dimethylformamide used was changed from 20 g to 100 g, and a hard coat film was formed. . The results are shown in Table 1.

Comparative Example 1 A thermosetting composition was prepared in the same manner as in Example 1 except that the amount of the hydrolyzate of γ-glycidoxypropyltrimethoxysilane was changed to 20 g from the composition of Example 1. Then, a hard coat film was prepared. As shown in Table 1, the hardness and the adhesion were reduced.

Comparative Example 2 A thermosetting composition was prepared in the same manner as in Example 1 except that 100 g of dimethylformamide and 800 g of colloidal antimony pentoxide sol were used. A coat film was prepared.
The results are shown in Table 1. The results are shown in Table 1,
Hardness decreased.

Comparative Example 3 A thermosetting composition was prepared in the same manner as in Example 1 except that dimethylformamide was omitted from the composition of Example 1, and a hard coat film was formed.
As shown in Table 1, the adhesion was reduced.

[0054]

[0055]

According to the present invention, a hard coat film having high hardness and excellent abrasion resistance, transparency, chemical resistance, adhesion and the like can be obtained.
Applied to sheets, lenses, resin members, etc., for example, front filters and covers for flat displays such as cathode ray tubes (CRTs), LCDs, PDPs, and ELs, cover cases, optical lenses, glasses lenses, window shields, light covers, Widely used for helmet shields.

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Claims (6)

[Claims] An essential component is an organosilicon compound represented by the following general formula (I) and / or a hydrolyzate thereof (component A), a compound having an epoxy group (component B), and metal compound fine particles (component C). The method for producing a hard coat film for polycarbonate comprising
Component A, Component B and Component C are mixed in an aprotic polar solvent at a ratio of 1/3 or more and 2/1 or less and a ratio of B component / C component of 2/3 or more and 3/1 or less. Is the total solvent 3
A method for producing a hard coat film, wherein the film is formed by dissolving and dispersing in a solvent of not less than 35 wt% and not more than 35 wt%. ^{R 1 aR 2 bSi (OR 3} ) 4- a - b (I) ( In the formula, R ¹ and R ² are each an alkyl group, an alkenyl group, ant - group, a halogen group, an epoxy group, glycidoxy group,
It is at least one selected from an amino group, a mercapto group, a methacryloxy group and a hydrocarbon group having a cyano group, and R ¹ and R ² may be the same or different. R ³ is a hydrolyzable group, and a and b are 0 or 1. ) 2. The metal compound fine particles (component C) are composed of antimony pentoxide, zinc antimonate, titanium oxide, a composite oxide of cerium oxide / titanium oxide, tin oxide, and indium oxide (indium oxide / tin oxide composite oxide). Selected from zirconium oxide and aluminum oxide
2. The method for producing a hard coat film according to claim 1, wherein the number is at least one. 3. The method according to claim 1, wherein the metal compound fine particles (component C) are antimony pentoxide. 4. The method for producing a hard coat film according to claim 1, wherein the compound having an epoxy group (component B) is a bisphenol A type epoxy resin. 5. The method for producing a hard coat film according to claim 1, wherein said aprotic polar solvent is dimethylformamide. 6. The method for producing a hard coat film according to claim 1, wherein the static contact angle of the surface of the polycarbonate is 98 degrees or less.