阅读说明：本技术 固化性树脂组合物、玻璃构件、显示装置和便携终端 (Curable resin composition, glass member, display device, and mobile terminal ) 是由 高木俊辅 大久保健实 于 2017-03-31 设计创作，主要内容包括：一种固化性树脂组合物,其用于形成对玻璃基材的端部进行保护的固化物,该组合物含有第一自由基聚合性化合物、具有磷酸酯结构的第二自由基聚合性化合物和自由基引发剂,第二自由基聚合性化合物的含量相对于第一自由基聚合性化合物的合计100质量份为0.05～5质量份。(A curable resin composition for forming a cured product for protecting an end of a glass substrate, the composition comprising a first radically polymerizable compound, a second radically polymerizable compound having a phosphate ester structure, and a radical initiator, wherein the content of the second radically polymerizable compound is 0.05 to 5 parts by mass relative to 100 parts by mass of the total of the first radically polymerizable compounds.)

1. A curable resin composition comprising a first radically polymerizable compound, a second radically polymerizable compound having a phosphate ester structure, and a radical initiator,

the content of the second radically polymerizable compound is 0.05 to 5 parts by mass relative to 100 parts by mass of the total of the first radically polymerizable compounds,

the curable resin composition is used for forming a cured product for protecting an end of a glass substrate.

2. The curable resin composition according to claim 1, wherein the content of the second radically polymerizable compound is 0.05 to 1.5 parts by mass relative to 100 parts by mass of the total amount of the first radically polymerizable compounds.

3. The curable resin composition according to claim 1, wherein the content of the second radically polymerizable compound is 0.05 to 0.5 parts by mass relative to 100 parts by mass of the total amount of the first radically polymerizable compounds.

4. The curable resin composition according to any one of claims 1 to 3, which is ultraviolet-curable.

5. A glass member comprising a glass substrate and a cured product of the curable resin composition according to any one of claims 1 to 4, wherein the cured product is provided on at least a part of an end of the glass substrate.

6. A display device comprising the glass member according to claim 5.

7. A mobile terminal comprising the glass member according to claim 5.

Technical Field

The invention relates to a curable resin composition, a glass member, a display device and a portable terminal.

Background

In portable terminals such as smartphones and tablet computers, a screen size is increased and a thickness is reduced for the purpose of reducing the weight. Along with this, thinning of glass members such as cover glasses and glass substrates for liquid crystal displays is also advancing. As the cover glass, chemically strengthened glass having high strength is widely used, and even in the case of chemically strengthened glass, cracks may occur when an impact is applied to an end portion.

In order to improve the strength and crack resistance of the end portion of the glass substrate, a method of edging the outer periphery of the glass substrate with a plastic film such as a polymer coating layer has been proposed (for example, see patent documents 1 and 2).

Disclosure of Invention

Problems to be solved by the invention

In the case where a protective film made of a resin is provided on the end face of the glass substrate, it is desirable to use a curable resin composition that can be applied from the viewpoint of productivity and process easiness. However, in the case of a conventional UV-curable resin composition used for a coating material or the like, it is difficult to design a cured product that can withstand repeated impacts on the surface of glass. In particular, the adhesion of a cured product exposed to a high-temperature environment to glass tends to decrease, and the function of protecting glass is insufficient.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a curable resin composition capable of forming a cured product having excellent adhesion to glass, a glass member having a cured product having an excellent protective function, and a display device and a mobile terminal provided with the glass member.

Means for solving the problems

The present inventors have intensively studied to solve the above problems, and as a result, they have found that a cured product capable of sufficiently maintaining adhesion to glass even in a high-temperature environment can be formed by blending a specific amount of a radical polymerizable compound having a specific structure into a radical polymerizable resin composition, and have completed the present invention.

Specifically disclosed is a curable resin composition for forming a cured product that protects an end of a glass substrate, which contains a first radically polymerizable compound, a second radically polymerizable compound having a phosphate ester structure, and a radical initiator, wherein the content of the second radically polymerizable compound is 0.05-5 parts by mass relative to 100 parts by mass of the first radically polymerizable compound in total.

According to the curable resin composition of the present invention, by having the above-described configuration, a cured product capable of maintaining sufficient adhesion to glass even in a high-temperature environment can be formed.

In the curable resin composition of the present invention, the content of the second radically polymerizable compound is preferably 0.05 to 1.5 parts by mass with respect to 100 parts by mass of the total amount of the first radically polymerizable compounds. In this case, a cured product capable of sufficiently maintaining adhesion to glass even in a high-humidity environment can be formed.

Further, the content of the second radically polymerizable compound is preferably 0.05 to 0.5 part by mass with respect to 100 parts by mass of the total amount of the first radically polymerizable compounds. In this case, a cured product capable of sufficiently maintaining adhesion to glass over a long period of time even in a high-temperature environment or a high-humidity environment can be formed.

The curable resin composition of the present invention may be UV curable.

The present invention also provides a glass member comprising a glass substrate and a cured product of the curable resin composition of the present invention, wherein the cured product is provided on at least a part of an end of the glass substrate.

The glass member of the present invention has an end protected by a cured product of the curable resin composition of the present invention, and thus has excellent crack resistance. In addition, the glass member of the present invention can have sufficient crack resistance even in a high-temperature environment.

The present invention also provides a display device including the glass member of the present invention.

The present invention also provides a portable terminal including the glass member of the present invention.

Effects of the invention

According to the present invention, a curable resin composition capable of forming a cured product having excellent adhesion to glass, a glass member having a cured product having an excellent protective function, and a display device and a mobile terminal provided with the glass member can be provided.

Drawings

FIG. 1: fig. 1(a) is a plan view showing one embodiment of the glass member of the present invention, and fig. 1(b) is a schematic cross-sectional view showing a cross section of the glass member shown in fig. 1 (a).

FIG. 2: fig. 2 is a diagram showing an enlarged photograph of an end portion of the glass member of the present invention.

FIG. 3: fig. 3 is a schematic cross-sectional view showing one embodiment of a display device of the present invention.

Detailed Description

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings as appropriate. However, the present invention is not limited to the following embodiments. In the present specification, "(meth) acrylic acid" means acrylic acid or methacrylic acid, and "(meth) acrylate" means acrylate or the corresponding methacrylate. "a or B" may include either one or both of a and B.

In addition, in the present specification, the term "layer" includes: a structure having a shape formed over the entire surface and a structure having a shape formed partially when viewed in plan view. In the present specification, the term "step" includes not only an independent step but also a step that is not clearly distinguished from other steps, and is included in the term as long as the intended function of the step is achieved. The numerical range shown by the term "to" represents a range including numerical values before and after the term "to" as a minimum value and a maximum value, respectively.

In the present specification, when a plurality of substances corresponding to each component are present in the composition, the content of each component in the composition refers to the total amount of the plurality of substances present in the composition unless otherwise specified. In addition, unless otherwise specified, the exemplified materials may be used alone or two or more kinds may be used in combination.

In the present specification, in the numerical ranges recited in the stepwise manner, the upper limit value or the lower limit value of the numerical range in one step may be replaced with the upper limit value or the lower limit value of the numerical range in another step. In the present specification, in the numerical ranges, the upper limit or the lower limit of the numerical range may be replaced with the values shown in the examples.

< curable resin composition >

The curable resin composition of the present embodiment contains: (A) the composition is composed of a first radically polymerizable compound (hereinafter, sometimes referred to as component (a)), a second radically polymerizable compound (hereinafter, sometimes referred to as component (B)) having a phosphate structure, and a radical initiator (hereinafter, sometimes referred to as component (C)).

The curable resin composition of the present embodiment can be used for forming a cured product for protecting an end portion of a glass substrate.

The curable resin composition of the present embodiment may be photocurable, thermosetting, moisture-curable, or two-component reaction-curable. From the viewpoint of productivity, stability, and tact time, photocurability is preferable, and Ultraviolet (UV) curability is more preferable.

In the case of the photocurable resin composition, ultraviolet rays are preferably used for curing. The light source to be used is not particularly limited, and examples thereof include an LED lamp, a mercury lamp (low pressure, high pressure, ultra high pressure, etc.), a metal halide lamp, an excimer lamp, and a xenon lamp, and preferably an LED lamp, a mercury lamp, a metal halide lamp, and the like.

In the case of a thermosetting resin composition, a high-temperature reaction furnace is preferably used for curing.

((A) first radically polymerizable Compound)

The component (A) may be a compound having a radical polymerizable group. Examples of the radical polymerizable group include: a group having a carbon-carbon double bond such as a vinyl group (ethenyl group), an ethynyl group, an allyl group, a (meth) acryloyl group, a (meth) acryloyloxy group, or a (meth) acryloylamino group. The component (a) preferably contains a compound having a (meth) acryloyloxy group from the viewpoint of physical properties after curing (for example, cure shrinkage, surface curability, curing speed, appearance).

Examples of the compound having a radical polymerizable group include: a (meth) acrylate monomer (hereinafter, sometimes referred to as the (A-1) component), a (meth) acrylamide monomer (hereinafter, sometimes referred to as the (A-2) component), a (meth) acrylate compound having a urethane bond (hereinafter, sometimes referred to as the (A-3) component), and the like. A compound different from the second radically polymerizable compound (B) having a phosphate structure described later is used as the component (A).

Examples of monofunctional (meth) acrylate monomers include: methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, tert-butyl (meth) acrylate, butoxyethyl (meth) acrylate, isoamyl (meth) acrylate, hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, heptyl (meth) acrylate, octyl (meth) acrylate, nonyl (meth) acrylate, decyl (meth) acrylate, undecyl (meth) acrylate, lauryl (meth) acrylate, tridecyl (meth) acrylate, tetradecyl (meth) acrylate, pentadecyl (meth) acrylate, hexadecyl (meth) acrylate, stearyl (meth) acrylate, behenyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, tert-butyl (meth) acrylate, isobutyl (meth) acrylate, tert-butyl (meth) acrylate, butoxyethyl (meth) acrylate, isobutyl, Aliphatic (meth) acrylates such as 3-chloro-2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, methoxypolyethylene glycol (meth) acrylate, ethoxypolyethylene glycol (meth) acrylate, methoxypolypropylene glycol (meth) acrylate, ethoxypolypropylene glycol (meth) acrylate, mono (2- (meth) acryloyloxyethyl) succinate, and reactants of (meth) acrylic acid and glycidyl ester (for example, "Cardura E-10" manufactured by MomentivePerformance Materials); alicyclic (meth) acrylates such as cyclopentyl (meth) acrylate, cyclohexyl (meth) acrylate, cycloheptyl (meth) acrylate, dicyclopentyl (meth) acrylate, dicyclopentenyl (meth) acrylate, isobornyl (meth) acrylate, mono (2- (meth) acryloyloxyethyl) tetrahydrophthalate, and mono (2- (meth) acryloyloxyethyl) hexahydrophthalate.

Examples of the 2-functional (meth) acrylate monomer include: ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, dipropylene glycol di (meth) acrylate, tripropylene glycol di (meth) acrylate, tetrapropylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, ethoxylated polypropylene glycol di (meth) acrylate, 1, 3-butanediol di (meth) acrylate, 1, 4-butanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, 3-methyl-1, 5-pentanediol di (meth) acrylate, 1, 6-hexanediol di (meth) acrylate, 2-butyl-2-ethyl-1, 3-propanediol di (meth) acrylate, ethylene glycol di (meth) acrylate, propylene glycol di (meth), Aliphatic (meth) acrylates such as 1, 9-nonanediol di (meth) acrylate, 1, 10-decanediol di (meth) acrylate, glycerol di (meth) acrylate, tricyclodecanedimethanol (meth) acrylate, and ethoxylated 2-methyl-1, 3-propanediol di (meth) acrylate; alicyclic (meth) acrylates such as cyclohexanedimethanol (meth) acrylate, ethoxylated cyclohexanedimethanol (meth) acrylate, propoxylated cyclohexanedimethanol (meth) acrylate, ethoxylated propoxylated cyclohexanedimethanol (meth) acrylate, tricyclodecanedimethanol (meth) acrylate, ethoxylated tricyclodecanedimethanol (meth) acrylate, propoxylated tricyclodecanedimethanol (meth) acrylate, ethoxylated hydrogenated bisphenol A di (meth) acrylate, propoxylated hydrogenated bisphenol A di (meth) acrylate, ethoxylated hydrogenated bisphenol F di (meth) acrylate, propoxylated hydrogenated bisphenol F di (meth) acrylate, and ethoxylated propoxylated hydrogenated bisphenol F di (meth) acrylate And the like.

Examples of the 3-or more-functional (meth) acrylate monomer include: trimethylolpropane tri (meth) acrylate, ethoxylated trimethylolpropane tri (meth) acrylate, propoxylated trimethylolpropane tri (meth) acrylate, ethoxylated propoxylated trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, ethoxylated pentaerythritol tri (meth) acrylate, propoxylated pentaerythritol tri (meth) acrylate, aliphatic (meth) acrylates such as ethoxylated propoxylated pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, ethoxylated pentaerythritol tetra (meth) acrylate, propoxylated pentaerythritol tetra (meth) acrylate, ethoxylated propoxylated pentaerythritol tetra (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, and dipentaerythritol hexa (meth) acrylate.

The component (a-1) is preferably a monofunctional (meth) acrylate monomer, more preferably a monofunctional alicyclic (meth) acrylate, and even more preferably isobornyl (meth) acrylate, from the viewpoint of compatibility with the component (a-3) described later and other additional components, and from the viewpoint of hardness characteristics during curing.

Examples of the (meth) acrylamide monomer include: (meth) acrylamide, methyl (meth) acrylamide, dimethyl (meth) acrylamide, ethyl (meth) acrylamide, diethyl (meth) acrylamide, n-propyl (meth) acrylamide, di-n-propyl (meth) acrylamide, isopropyl (meth) acrylamide, diisopropyl (meth) acrylamide, n-butyl (meth) acrylamide, di-n-butyl (meth) acrylamide, isobutyl (meth) acrylamide, diisobutyl (meth) acrylamide, t-butyl (meth) acrylamide, di-t-butyl (meth) acrylamide, n-pentyl (meth) acrylamide, di-n-pentyl (meth) acrylamide, n-hexyl (meth) acrylamide, di-n-hexyl (meth) acrylamide, cyclohexyl (meth) acrylamide, dicyclohexyl (meth) acrylamide, (meth) acryloylmorpholine and the like.

As the component (A-2), from the viewpoint of compatibility with the component (A-3) described later and other additional components, and from the viewpoint of hardness characteristics at the time of curing, it is preferable to use (meth) acryloylmorpholine.

The (meth) acrylate compound having a urethane bond may have at least 1 (meth) acryloyl group or (meth) acryloyloxy group.

Examples of the (meth) acrylate compound having a urethane bond include: a reaction product of a (meth) acrylic monomer having an OH group at the β -position and a diisocyanate compound such as isophorone diisocyanate, 2, 6-toluene diisocyanate, 2, 4-toluene diisocyanate, 1, 6-hexamethylene diisocyanate, tris ((meth) acryloxytetraethylene glycol isocyanate) hexamethylene isocyanurate, EO-modified urethane di (meth) acrylate, PO-modified urethane di (meth) acrylate, EO-and PO-modified urethane di (meth) acrylate, carboxyl-containing urethane (meth) acrylate, and the like. Further, as the (meth) acrylate compound having a urethane bond, a urethane oligomer is also preferably used.

The weight average molecular weight of the component (a-3) is preferably 800 or more, more preferably 2,000 or more, and even more preferably 4,000 or more, from the viewpoints of coatability in a liquid state, workability, curing shrinkage after curing, surface curability, hardness, elongation, and other physical properties. From the same viewpoint, the weight average molecular weight of the component (a-3) is preferably 10,000 or less, more preferably 9,000 or less, and still more preferably 7,000 or less. The weight average molecular weight is a value measured by Gel Permeation Chromatography (GPC) and converted to standard polystyrene.

Examples of commercially available products include "ArtressinUN-904" and "ArtressinUN-6060S" manufactured by Industrial Co., Ltd.

Of the above-mentioned component (A), the component (A-1) and the component (A-2) are preferably used in combination, and the monofunctional (meth) acrylate monomer as the component (A-1) and the component (A-2) are more preferably used in combination.

The total content of the component (a-1) and the component (a-2) is preferably 20 mass% or more, more preferably 30 mass% or more, and even more preferably 40 mass% or more, based on the total mass of the curable resin composition, from the viewpoint of physical properties such as coatability in a liquid state, workability, curing shrinkage after curing, surface curability, hardness, and elongation. The total content of the component (a-1) and the component (a-2) is preferably 90 mass% or less, more preferably 70 mass% or less, and even more preferably 50 mass% or less, based on the total mass of the curable resin composition, from the viewpoint of physical properties such as coatability in a liquid state, workability, curing shrinkage after curing, surface curability, hardness, and elongation.

The content of the component (a-3) is preferably 10% by mass or more, more preferably 30% by mass or more, and further preferably 50% by mass or more, based on the total mass of the curable resin composition, from the viewpoint of physical properties such as coatability in a liquid state, workability, curing shrinkage after curing, surface curability, hardness, and elongation. The content of the component (a-3) is preferably 80 mass% or less, more preferably 70 mass% or less, and even more preferably 60 mass% or less, based on the total mass of the curable resin composition, from the viewpoint of physical properties such as coatability in a liquid state, workability, curing shrinkage after curing, surface curability, hardness, and elongation.

((B) second radically polymerizable Compound)

Examples of the radical polymerizable compound having a phosphate ester structure include compounds having at least 1 kind of radical polymerizable group selected from phosphoric acid groups and phosphate ester groups, and at least 1 kind of radical polymerizable group. Examples of the radical polymerizable group include groups having a carbon-carbon double bond such as a vinyl group (ethenyl group), an ethynyl group, an allyl group, a (meth) acryloyl group, a (meth) acryloyloxy group, and a (meth) acryloylamino group. (B) The component (b) is preferably a compound having a (meth) acryloyloxy group and a phosphate structure.

Examples of the component (B) include: and compounds represented by the following general formula (1) such as acid phosphoryloxy (Japanese: アシッドホスホオキ シ) ethyl (meth) acrylate, acid phosphoryloxypropyl (meth) acrylate, acid phosphoryloxybutyl (meth) acrylate, acid phosphoryloxypentyl (meth) acrylate, acid phosphoryloxy polyoxyethylene glycol monomethacrylate, acid phosphoryloxy polyoxypropylene glycol monomethacrylate, and the like.

[ solution 1]

[ in the formula, R¹Represents hydrogen or methyl, R²Represents a linear, branched or cyclic alkyl group, n represents a number of 1 or more, and m represents a number of 1 to 3.]

In the compound represented by the formula (1), the number of carbon atoms in the alkyl group is preferably 1 to 12, more preferably 1 to 9, and still more preferably 1 to 6. n is preferably 1 to 12, more preferably 1 to 6, and further preferably 1 to 3. m is preferably 1 to 2, more preferably 1.

Further, as the component (B), for example, a compound represented by the following general formula (2) can be exemplified.

[ solution 2]

[ in the formula, R³Represents hydrogen or methyl, R⁴And R⁵Each independently represents a linear, branched or cyclic alkyl group, and x represents a number of 1 to 3.]

In the compound represented by the formula (2), R⁴And R⁵The number of carbon atoms of the alkyl group(s) is preferably 2 to 12.

Further, as the component (B), there can be mentioned: 3-chloro-2-acid phosphoryloxypropyl (meth) acrylate, phenyl (2- (meth) acryloyloxyethyl) phosphate, diphenyl (2- (meth) acryloyloxyethyl) phosphate, (meth) acryloyloxy-2-hydroxypropyl acid phosphate, (meth) acryloyloxy-3-chloro-2-hydroxypropyl acid phosphate, allyl alcohol acid phosphate, and the like.

The component (B) may be a salt of the above compound such as a monomethanolamine salt or a monoethanolamine salt.

(B) Component (C) is preferably a compound represented by the formula (2), more preferably R in the formula (2)³Is methyl, R⁴is-CH₂CH₂－、R⁵is-CH₂CH₂CH₂CH₂CH₂-and x is 1.5.

The content of the component (B) is preferably 0.05 to 5 parts by mass relative to 100 parts by mass of the total of the components (a) from the viewpoint of obtaining good adhesion to the glass substrate. When the content of the component (B) is in this range, a cured product capable of maintaining sufficient adhesion to glass even in a high-temperature environment can be formed.

In addition, the content of the component (B) is preferably 0.05 to 1.5 parts by mass relative to 100 parts by mass of the total of the components (a) from the viewpoint of obtaining good adhesion to a glass substrate in a high-humidity environment. In this case, a cured product capable of sufficiently maintaining adhesion to glass even in a high-humidity environment can be formed.

In addition, from the viewpoint of obtaining a higher level of adhesion to the glass substrate, the content of the component (B) is preferably 0.05 to 0.5 parts by mass with respect to 100 parts by mass of the total of the components (a). In this case, a cured product capable of sufficiently maintaining adhesion to glass over a long period of time even in a high-temperature environment or a high-humidity environment can be formed.

((C) free radical initiator)

When the curable resin composition is a photocurable resin composition, a photopolymerization initiator can be used as the radical initiator. The photopolymerization initiator also includes a type called a sensitizer. When the curable resin composition is a thermosetting resin composition, a thermal polymerization initiator can be used as the radical initiator.

Examples of the photopolymerization initiator include: acridine; an acridine-based compound having at least one acridine group in a molecule; benzophenone; n, N-tetraalkyl-4, 4 '-diaminobenzophenone such as N, N' -tetramethyl-4, 4 '-diaminobenzophenone (michler's ketone); aromatic ketones such as 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone-1, 2-methyl-1- (4-methylthiophenyl) -2-morpholinoacetone-1, (1-hydroxycyclohexyl) phenyl ketone, and the like; quinones such as alkylanthraquinone; benzoin ether compounds such as benzoyl alkyl ether; benzoin; benzoin compounds such as alkylbenzoin; benzil derivatives such as benzil dimethyl ketal; 2,4, 5-triarylimidazole dimers such as 2- (o-chlorophenyl) -4, 5-diphenylimidazole dimer, 2- (o-chlorophenyl) -4, 5-bis (methoxyphenyl) imidazole dimer, 2- (o-fluorophenyl) -4, 5-diphenylimidazole dimer, 2- (o-methoxyphenyl) -4, 5-diphenylimidazole dimer, and 2- (p-methoxyphenyl) -4, 5-diphenylimidazole dimer; n-phenylglycine; n-phenylglycine derivatives; a coumarin-based compound; onium salts, and the like.

From the viewpoint of the balance between deep-cure properties and surface-cure properties and the physical properties of the cured product, component (C) in the photocurable resin composition preferably contains an aromatic ketone, and more preferably contains (1-hydroxycyclohexyl) phenyl ketone and/or 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one.

Examples of the thermal polymerization initiator include: organic peroxides such as benzoyl peroxide, tert-butyl peroxybenzoate, cumene hydroperoxide, diisopropyl peroxydicarbonate, di-n-propyl peroxydicarbonate, bis (2-ethoxyethyl) peroxydicarbonate, tert-butyl peroxyneodecanoate, tert-butyl peroxypivalate, 3,5, 5-trimethylhexanoyl peroxide, dipropionyl peroxide, diacetyl peroxide, and didodecyl peroxide; azo compounds such as 2,2 ' -azobisisobutyronitrile, 2 ' -azobis (2-methylbutyronitrile), 1 ' -azobis (cyclohexane-1-carbonitrile), 2 ' -azobis (2, 4-dimethylvaleronitrile), 2 ' -azobis (2, 4-dimethyl-4-methoxyvaleronitrile), dimethyl 2,2 ' -azobis (2-methylpropionate), 4 ' -azobis (4-cyanovaleric acid), 2 ' -azobis (2-hydroxymethylpropionitrile), and 2,2 ' -azobis [ 2- (imidazolin-2-yl) propane ].

The content of the component (C) is preferably 0.1 part by mass or more, more preferably 1 part by mass or more, and further preferably 5 parts by mass or more, based on 100 parts by mass of the total of the components (a) and (B), from the viewpoint of sufficient curing of the curable resin composition and physical properties such as curing shrinkage, surface curability, hardness, and elongation of a cured product. The content of the component (C) is preferably 30 parts by mass or less, more preferably 20 parts by mass or less, and still more preferably 15 parts by mass or less, based on 100 parts by mass of the total of the components (a) and (B), from the viewpoint of physical properties such as curing shrinkage, surface curability, hardness, and elongation of the cured product.

(additives)

The curable resin composition of the present embodiment may contain various additives as needed. Examples of additives include: adhesion improving agents such as colorants and coupling agents, polymerization inhibitors, light stabilizers, defoaming agents, fillers, antioxidants, chain transfer agents, thixotropy imparting agents, plasticizers, flame retardants, mold release agents, surfactants, lubricants, antistatic agents, and the like. As these additives, known additives can be used.

Examples of the colorant include dyes and pigments. By including a colorant in the curable resin composition, the formed cured product can function not only as a protective layer but also as a light shielding layer or a design layer.

The colorant dissolved in the component (a) and the component (B) can be selected from the viewpoint of obtaining a uniform curable resin composition.

The dissolution of the colorant in the monomer component can be confirmed by the following method. A50 mL beaker was charged with 10mL (temperature 25 ℃) of the monomer component and 10mg (mass of solid component) of the colorant, and stirred with a glass rod for 1 minute. When the solid content of the colorant is not visually confirmed, it is determined that the colorant is dissolved in the monomer component.

From the viewpoint of light-shielding properties, the colorant may have an average visible light transmittance of 50% or less, 45% or less, or 40% or less. Here, the average transmittance of visible light means the average transmittance of light having a wavelength of 400 to 700 nm. The average transmittance of visible light can be measured by the following method: the light transmittance of a colorant solution containing 100 parts by mass of a solvent for dissolving a colorant and 0.1 part by mass of a colorant was measured at 1nm intervals in a range of 400 to 700nm using a spectrocolorimeter (for example, "CM-3700A" manufactured by Konika-Mendata, K.K.) and the average value of the measured values was determined as the average transmittance. The dissolution of the colorant in the solvent can be confirmed by the same method as the above-mentioned "dissolution of the colorant in the monomer component".

In the case where the curable resin composition of the present embodiment is a photocurable resin composition and contains a colorant, the light transmittance of the colorant at a peak wavelength of light (active energy ray) irradiated for a curing reaction (hereinafter, also referred to as "irradiation light transmittance") may be higher than the average transmittance of visible light by 10% or more, 20% or more, or 30% or more. The irradiation light transmittance may be 60% or more, 65% or more, or 70% or more. By using a colorant having a high transmittance for light to be irradiated, it is possible to efficiently perform a curing reaction by radical photopolymerization while securing a sufficient light-shielding property. The irradiation light transmittance of the colorant may be determined by the following method: the light transmittance of the colorant at the peak wavelength of light (active energy ray) irradiated for the curing reaction, which includes 100 parts by mass of a solvent dissolving the colorant and 0.1 part by mass of a colorant solution, was measured under the condition that the decomposition wavelength (japanese: decomposition wavelength) was 1 nm. As the measuring apparatus, a visible ultraviolet spectrophotometer (for example, "UV-2400 PC" manufactured by Shimadzu corporation) can be used. The measurement range is, for example, 300 to 780 nm.

The colorant may contain, for example, at least 1 selected from phthalocyanine blue, phthalocyanine green, iodine green, diazo yellow, aniline black, perylene black, and fluoran.

The content of the colorant may be 0.1% by mass or more, 0.3% by mass or more, or 0.5% by mass or more, or 10% by mass or less, 7.5% by mass or less, or 5% by mass or less, relative to the total amount of the curable resin composition, from the viewpoint of obtaining the effect of shielding visible light.

Examples of the coupling agent include titanate-based coupling agents and silane-based coupling agents. Examples of the titanate-based coupling agent include: a titanate-based coupling agent having at least an alkylate group having 1 to 60 carbon atoms, a titanate-based coupling agent having an alkylphosphorous ester group, a titanate-based coupling agent having an alkylpyrophosphoric ester group, and the like. Examples of the silane coupling agent include: amino silane coupling agents, ureido silane coupling agents, vinyl silane coupling agents, methacrylic silane coupling agents, epoxy silane coupling agents, mercapto silane coupling agents, isocyanate silane coupling agents, and the like.

As the polymerization inhibitor, there may be mentioned: quinones such as hydroquinone, hydroquinone monomethyl ether, benzoquinone, p-tert-butylcatechol, 2, 6-di-tert-butyl-4-methylphenol, and pyrogallol.

Examples of the defoaming agent include silicone oil, fluorine oil, and polycarboxylic acid polymer.

< method for producing curable resin composition >

The curable resin composition can be produced by a method of mixing the component (a), the component (B), and the component (C) with the above-mentioned additives, if necessary, by stirring. The stirring can be performed by a known method using a stirrer, a stirring blade, or the like. The temperature during stirring may be, for example, 20 to 80 ℃.

< glass Member >

Fig. 1(a) is a plan view showing an embodiment of the glass member of the present invention, and fig. 1(b) is a schematic cross-sectional view of a cross section of the glass member shown in fig. 1 (a). The glass member 100 of the present embodiment includes a glass substrate 1 and a cured product 10 of the curable resin composition of the present embodiment, and the cured product 10 is provided at least in part of an end portion of the glass substrate.

The end portion of the glass substrate means a portion of the glass substrate including at least a side surface (end surface), and may be a portion including not only the side surface of the glass substrate but also an edge of one or both surfaces of the glass substrate. In the glass member 100, the cured product 10 is provided on the end face 2 of the glass substrate.

(glass substrate)

The material of the glass substrate is not particularly limited. Examples of the glass include alkali-free glass, low-alkali glass, and quartz glass. The glass substrate may be chemically strengthened by an ion exchange method.

The size and thickness of the glass substrate are not particularly limited, and may be appropriately determined depending on the application. For example, when the glass substrate is used for a cellular phone, the size is about 60mm × 120mm, and the thickness is about 0.55 mm.

The glass member of the present embodiment can be a glass member having excellent crack resistance by protecting the end portion with the cured product of the curable resin composition of the present invention. In addition, the glass member of the present embodiment can have sufficient crack resistance even in a high-temperature environment.

The curable resin composition of the present embodiment is applied to the end face 2 of the glass substrate 1 to form a coating layer, and the coating layer is cured by irradiation with light or heating to form a cured product 10.

Examples of the coating method include a potting method, a dipping method, a spraying method, a roll coating method, and the like. Coating can also be performed using a coater such as an injection coater or a spray coater.

The light source can be used for light irradiation, and the heat source can be used for heating.

Fig. 2 is a diagram showing an enlarged photograph of an end portion of the glass member of the present invention. As shown in the figure, the surface of the cured product is preferably curved from the viewpoint of improving the crack resistance, design properties, and handling properties of the glass. In this case, the ratio t/D of the maximum thickness t of the cured product to the thickness D of the glass substrate is preferably 0.05 to 1.5, and more preferably 0.2 to 0.7. In the figure, the distance t between the surface 20 along the end surface of the glass substrate and the point where the perpendicular 22 to the surface 20 intersects the surface of the cured product represents the maximum thickness of the cured product.

The glass member of the present embodiment may have other members as the glass substrate on which the cured product is to be provided. For example, as in the glass member 110 shown in fig. 3, the cured product 10 may be provided around the joint (2 and 6) between the glass substrate 1 and the other member 5.

< display device >

The glass member of the present embodiment can be used for a display portion of a display device. That is, the display device of the present invention may include the glass member of the present embodiment. Examples of the display device include a Flat Panel Display (FPD), and specifically include a Liquid Crystal Display (LCD), a Plasma Display Panel (PDP), an organic electroluminescence panel (OELP), a Field Emission Display (FED), a Cathode Ray Tube (CRT), and electronic paper.

< Portable terminal >

The glass member of the present embodiment can be used for a portable terminal. For example, the glass member may be used for a display portion of a portable terminal. Examples of the portable terminal include a mobile phone, a smart phone, a personal computer, an electronic dictionary, a calculator, a game machine, and the like.