JPH0459335A - Sheet for photocurable coating - Google Patents

Abstract

PURPOSE:To obtain a sheet possessing ductility and flexibility under the normal temperature or under heating, by a method wherein the title sheet is comprised of a composition containing mainly of acrylic resin having specific molecular weight and a reactive functional group, a reactive compound having the reactive functional group and a reactive vinyl group, a curing agent which is capable of reacting with the reactive functional group of the reactive compound and a photopolymerization initiator. CONSTITUTION:A composition for a sheet containing mainly of acrylic resin having weight-average molecular weight of 2,000-800,000 and a reactive functional group, a reactive compound having the functional group and a reactive vinyl group, a curing agent which is capable of reacting with the reactive functional group and photopolymerization initiator is applied to process paper at a fixed thickness and then the title sheet is obtained by allowing the reactive compound and curing agent react with each other by heating them. The acrylic resin having the reactive functional group is an acrylic series polymer having a plurality of reactive functional groups (a hydroxyl group, amino group and carboxyl group). The acrylic series polymer is obtained by copolymerizing, for example, a monomer like a (meth)acrylic acid ester monomer having the hydroxyl group, 2-amino ethyl (meth)acrylate and (meth)acrylic acid.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention can be applied to the surface of articles such as furniture and steel plates, and can be applied for decoration, display, surface protection, corrosion prevention such as rust prevention, etc. This relates to sheets (or films) for

(Prior Art) Conventionally, paints have generally been used to decorate or display the surfaces of articles. Since paints usually contain organic solvents, their impact on the working environment (pollution, hygiene hazards) is a problem.

In addition, although water-based paints pose no problems in terms of the working environment, they do have problems in workability, such as longer drying times or the need for a large amount of energy for drying.

Recently, sheet-like pasting materials based on polyvinyl chloride have been proposed. The material used in this sheet form does not affect the working environment, and since it is in a sheet form, there is no need for drying. However, since this sheet-like adhesive is mainly made of a soft polyvinyl chloride sheet, there is a drawback that the hardness and scratch resistance of the coating are poor.

As a method for improving such drawbacks, a method has been proposed in which the sheet material is hardened after being attached to the surface of the article. For example, in Japanese Patent Publication No. 57-13425, a porous sheet-like base material is impregnated with a radical initiator,
A thermosetting composite sheet has been proposed in which a layer containing a polymer, a radically reactive monomer, etc. is laminated on one or both sides. In addition, Japanese Patent Publication No. 50-21630 discloses that powder containing a radically reactive unsaturated compound that is solid at room temperature and powder that is solid at room temperature are contained in a self-supporting continuous layer made of thermoplastic and/or rubbery material. A heat-curable sheet material suitable for coating the surface of an article has been proposed, which is made by blending a powder containing a radical reaction initiator.

(Problems to be Solved by the Invention) The sheet material disclosed in Japanese Patent Publication No. 57-13425 has a structure in which a layer containing a radically reactive unsaturated compound and a layer containing a radical reaction initiator are laminated. Therefore, in order to cause a uniform curing reaction in both layers, it is necessary to uniformly contact and heat both layers, which makes it difficult to control pressure and heating. In addition, since paper, woven fabric, or non-woven fabric is used as the sheet-like base material to be impregnated with the radical reaction initiator, when coating articles with uneven or curved surfaces, the sheet does not stretch easily and forms a good coating. It's difficult.

The sheet material disclosed in Japanese Patent Publication No. 60-21630 is relatively malleable and is thought to be able to be applied to the surface of an article having an uneven or curved surface. However, since it is necessary to mix the radically reactive unsaturated compound and the radical reaction initiator in solid form, when manufacturing sheet materials, the same compounds must be mixed using a non-uniform method such as freeze-pulverization and powder mixing. As a result, mixing tends to be non-uniform, causing problems not only in surface performance but also in appearance, such as pigment dispersibility.

The present invention has been made to solve the above-mentioned drawbacks, and its purpose is to have spreadability and flexibility before curing and excellent workability, and to apply it uniformly by irradiating it with ultraviolet rays afterwards. An object of the present invention is to provide a photocurable coating sheet capable of forming a cured film with high hardness and hardness.

(Means for Solving the Problems) The photocurable coating sheet of the present invention has a weight average molecular weight of 2.
,000 to soo, ooo, an acrylic resin having a reactive functional group, a reactive compound having a reactive functional group and a reactive vinyl group, a curing agent capable of reacting with the reactive functional group of the reactive compound, and light The sheet composition contains a polymerization initiator as a main component, and the reactive functional group of the reactive compound reacts with the curing agent, thereby achieving the above object.

The sheet composition may further contain a compound having a reactive vinyl group.

The photocurable coating sheet of the present invention has sufficient flexibility and is malleable enough to be applied to the surface of an adherend having a three-dimensional curved surface (irregularities, etc.) before curing. This sheet is a photocurable coating sheet that can be cured by irradiating it with ultraviolet rays after being applied to an adherend, thereby causing the reactive vinyl groups of the reactive compounds contained in the sheet to react.

This photocurable coating sheet is usually obtained by applying the above-mentioned sheet composition to a certain thickness on process paper and then heating it to react with a reactive compound and a curing agent to form a film.

The physical properties of the resulting photocurable coating sheet can be greatly varied depending on the degree of reaction in the heating step, the type and amount of each component, etc.

Depending on the nature of the reactive compound that reacts with the curing agent,
For example, if the amount of the curing agent relative to the reactive functional groups is reduced, a soft sheet with excellent spreadability will be obtained, whereas, conversely, if the amount of the curing agent relative to the reactive functional groups is increased, a hard sheet will be obtained.

The acrylic resin having a reactive functional group (hereinafter referred to as reactive acrylic resin) used in the present invention is an acrylic polymer having a plurality of reactive functional groups (hydroxyl group, amino group, carboxyl group, etc.). Such reactive acrylic resins include, for example, a (meth)acrylic ester monomer, a styrene derivative monomer, a (meth)acrylic ester monomer having a hydroxyl group such as 2-hydroxyethyl (meth)acrylate, and a 2- It is obtained by copolymerizing monomers such as aminoethyl (meth)acrylate and (meth)acrylic acid. The reactive acrylic resin used in the present invention has a weight average molecular weight (Mw) of 2.
,000-800,000 is selected.

The weight average molecular weight is 2. If it is less than 000, it becomes difficult to impart properties such as spreadability and flexibility necessary for application to an adherend to the obtained covering sheet. The weight average molecular weight is so
o, o.

If it exceeds O, the viscosity of the sheet composition prepared using this increases, making it difficult to prepare a coating sheet. In addition, these reactive acrylic resins have a Tg (glass transition point) in the range of 0-80°C and a reactive functional group value (OH value) in the range of 40-150 due to the hardness after curing. Preferably. In addition, reactive acrylic resin is
Within these molecular weight ranges, combinations with different materials can be made.

The reactive compound having a reactive functional group and a reactive vinyl group used in the present invention includes an OH group, an NH2 group,
It is a compound that has at least one reactive functional group of at least one type of C0OH group, etc., and has at least one reactive unsaturated group, such as a vinyl group. Such compounds are usually liquid at the film forming temperature. Examples of such compounds include 2-hydroxypropyl (meth)acrylate, 2-hydroxy 3-phinoxypropyl acrylate, polypropylene glycol mono(meth)acrylate, polyethylene glycol mono(meth)acrylate,
Glycerol monomethacrylate, 2-acryloyloxyethyl succinic acid, 2-acryloyloxyethyl phthalic acid, 2-acryloyloxyethyl hexahydrophthalic acid, glycidylated (meth)acrylate and epoxy acrylate oligomers represented by general structural formula (1) There are many things like that.

(R+=H or CH3) These compounds can be used alone or in combination.

Examples of the curing agent that can react with the reactive functional group of the above-mentioned reactive compound include incyanate curing agents, melamine curing agents,
There are epoxy hardeners.

Incyanate curing agents are incyanate compounds having two or more isocyanate groups in the molecule, such as tolylene diisocyanate, diphenylmethane diisocyanate, naphthalene diisocyanate, toridine diisocyanate, triphenylmethane triisocyanate,
Iris (isocyanate phenyl) thiophosphite, p-phenylene diisocyanate, xylylene diisocyanate, bis(incyanate methyl) cyclohexane, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, lysine diisocyanate, trimethylhexamethylene diisocyanate, inphorone diisocyanate, etc. or trimethylolpropane adducts, incyanurate modified products, biuret modified products, carbodiimide modified products, urethane modified products, allophanate modified products, etc. of these monomers. The amount of this isocyanate added varies depending on the sheet forming method, but the amount of NCO group based on the amount (number) of reactive functional groups in the reactive compound is: NCO = 1: o, 3 ~
It is about 1.5.

Melamine curing agents are trimethylol melamine, hexamethylol melamine, which is produced by reacting formaldehyde with materials having polyfunctional amino groups such as melamine, urea, thiourea, guanidine, guanamine, acetoguanamine, benzoguanamine, dicyandiamide, and guanamine. It is an etherified melamine resin made by reacting dimethylol urea, dimethylol guanidine, dimethylol acetoguanamine, dimethylol benzoguanamine, etc. with an alcohol such as butyl alcohol or propyl alcohol. It is difficult to determine the amount of these melamine crosslinking agents added based on the reactive group value of the reactive compound like incyanate curing agents, so when adding them, conduct preliminary experiments before making the sheet. It is preferable to decide the amount to be added. Regarding this sheet formation, the amount of reactive functional groups in the compound (
Reactive functional group = OR (ether value) = 1
: About 0.3 to 1.5 is preferable.

The epoxy curing agent is a glycidyl compound of polyhydric alcohol, and is usually used together with a Lewis acid catalyst. Examples of epoxy curing agents include butadiene cidoxide, hexacin dioxide, diglycidyl ester of phthalic acid, diglycidyl ether of bisphenol-A, diglycidyl ether of bisphenol-F, triglycidyl ether amine of para-aminophenol, and diglycidyl ether of aniline. Examples include glycidyl compounds such as diglycidyl ether, tetraglycidyl ether of phenylenediamine, diglycidyl ether of sulfonamide, and triglycidyl ether of glycerin, as well as polyether-modified diglycidyl, polyester-modified diglycidyl, and urethane-modified diglycidyl compounds (polymers). The amount of this epoxy compound added is based on the amount (number) of reactive functional groups of the above-mentioned reactive compound, and the amount of reactive functional groups: CH2CH2O (epoxy group=1: about 0.3 to 1.5) is preferred.

Regarding the amount of these curing agents added, the above-mentioned snow is preferable, but in reality, depending on the reactivity of the reactive functional group of the reactive compound used, the curing agent may react with the reactive functional group of the compound at the same time. For example, since reactions occur between melamine hardeners and between melamine hardeners and epoxy hardeners, it is preferable to conduct preliminary experiments before making a decision.

Any commonly used photopolymerization initiator can be used, and benzoin alkyl ether, acetophenone, benzophenone, thioxanthone, and the like are often used. For example, benzoin ethers include benzyl, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropylethernato; acetophenone types include 2.2-jethoxyacetophenone, 2.2-dibutoxyacetophenone, 2.
-Hydroxy-2-methylpropiophenone, p-te
Examples of benzophenones such as r-butyltrichloroacetophenone include benzophenone, 4-chlorobenzophenone, 4,4-dichlorobenzophenone, 3.3-dimethyl-4-methoxybenzophenone, and dibenzosuberone; examples of thioxanthone include thioxanthone, 2 -Chlorothioxanthone, 2-methylthioxanthone, 2-isopropylthioxanthone, 2-ethyl anthraoxanthone, etc. Regarding the amount of photopolymerization initiator added, the appropriate amount differs depending on each material, but the reactive compound 10
For 0 parts by weight, 0, 5-2. It is preferably within the range of 0 parts by weight. Moreover, the photopolymerization initiator is not limited to one type, but can be used in combination of two or three types.

The above sheet composition may further contain a compound having a reactive vinyl group.

As the compound having a reactive vinyl group, (meth)acrylic and styrene materials are suitable as materials having good compatibility between the reactive functional group and the reactive compound having the reactive vinyl group. For example, (meth)acrylics include methyl (meth)acrylate, ethyl (meth)acrylate, benzyl (meth)acrylate, 2-ethoxydiethyl (meth)acrylate, phenoxydielene glycol (meth)acrylate, etc. From the monofunctional type of 1゜6-hexadiol di(meth)acrylate, neobentyl glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate, polypropylene glycol di(meth)acrylate, trimethylpropane tri(meth)acrylate, Multifunctional types such as pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, and dipentaerythritol hexa(meth)acrylate are applicable.

Styrene-based products include styrene, α-methylstyrene, α-
Various styrene derivatives such as ethylstyrene, p-methylstyrene, p-methoxystyrene, p-phenylstyrene, p-ethoxystyrene, p-chlorostyrene, m-chlorostyrene, and 0-chlorostyrene can be used. The amount of these compounds added is O to 1.0 parts by weight per 100 parts by weight of the reactive compound having a reactive functional group and a reactive vinyl group.
00 parts by weight, more preferably 0 to 600 parts by weight. Moreover, the compounds having reactive vinyl groups are not limited to one type, but can be used in combination of two or three types. Addition of a compound having a reactive vinyl group often has the effect of increasing the spreadability and flexibility of the photocurable coating sheet before curing (
It is also effective as a means for controlling ductility, ductility, and flexibility.

The photocurable coating sheet of the present invention is produced by sufficiently uniformly kneading the above-mentioned materials using an organic solvent, etc., if necessary, and using a casting method such as a knife coater, a reverse coater, etc. to release the coating sheet using a process paper (usually silicone). A photocurable sheet is created by coating mold-treated PET (polyethylene terephthalate, paper, etc.) and heating and drying to remove the solvent. In this heating and drying step, the curing agent reacts with the reactive compound, and the photocurable coating sheet comes to have properties such as spreadability and flexibility necessary for application to an adherend.

The film thickness of the photocurable coating sheet of the present invention varies depending on the adhesion of the sheet to the adherend and the function imparted to the adherend. From this point of view, the range of about 20 to 500 μm is preferable, but when pasting on a flat surface, the range of about 5 to 1.000 μm is also acceptable.

The following materials and the like may be added to the photocurable coating sheet of the present invention as necessary.

Colorants such as pigments and dyes may be included in the sheet composition. As for the colorant, pigments, dyes, etc. used in ordinary painting can be used. For example, pigments include titanium oxide, iron oxide, carbon black, cyanine pigments, etc.; dyes include azo dyes, anthracite dyes, indigoid dyes, stilbene dyes, etc.; and aluminum flakes, nickel powder, etc. There are metal powders such as gold powder, silver powder, etc. The amount of colorant that can be added depends on the type of constituent components of the sheet composition, the thickness of the sheet, the type of colorant, etc., but it should be within the range that allows the entire sheet to be cured by ultraviolet irradiation. It goes without saying that there is. These sheet compositions contain inorganic fillers, metal materials, anti-aging agents, rust preventive agents, etc. in an amount that allows the sheet to be cured by ultraviolet rays in order to control the surface and improve functionality. It doesn't matter if it is included.

When the photocurable coating sheet of the present invention has low rigidity at room temperature, it becomes difficult for the photocurable coating sheet to maintain its shape. In such cases, the shape retention of the sheet can be improved by providing a support layer on the photocurable coating sheet. This support layer is
Although it is used to maintain the shape of the entire sheet, flexibility may be imparted to the support layer when it is attached to a three-dimensional curved surface or the like with this support layer. For example, a rubber-like material is used, or a thermoplastic or thermosetting material that becomes malleable when heated or the like is used. These supporting layers may be peeled off immediately after pasting and the sheet is cured, or they may be cured while being attached to the adherend and serve as a protective layer until the adherend is used. It can also be used as Furthermore, the surface shape (surface state) of the photocurable coating sheet can be adjusted by providing embossing or patterns on the surface of this support layer.

Next, the obtained sheet is attached to an adherend, and the sheet is cured by irradiating the sheet with ultraviolet rays to obtain a coating. Various methods can be used to attach it to the adherend.

For example, there are methods such as manual pasting, laminator method, (vacuum) pressing, insert injection (in-mold coating), vacuum adhesion molding (vacuum packaging molding), etc., but these methods can improve adhesion to the adherend and prevent rust. In order to improve properties, etc., vacuum contact molding, vacuum pressing, etc. in which a vacuum is created between the adherend and the photocurable coating sheet are preferred.

In order to cure the photocurable coating sheet with ultraviolet rays, it is necessary to wait for a predetermined period of time with light having a wavelength that satisfies the usage conditions of the photopolymerization initiator used.

Various types of adherends can be used to attach these.

For example, metal-plated plates such as steel plates, aluminum plates, galvanized iron, and tin plates, plasterboards, cement, ceramics such as chinaware, steel plates and ceramics, resin-based coated plates, and even polyolefins and ABS. Resin, polyphenylene sulfide (PPS'),
Thermoplastic resins such as polyetherimide, melamine resins,
Materials include thermosetting resins such as epoxy resins, phenolic resins, and polyimides. For application to these materials, there are cases in which only a photocurable coating sheet is required, and cases in which an adhesive layer is laminated on the sheet. Materials for laminating these adhesive layers on sheets include, for example, EVA
HM (hot melt) adhesive, SIS HM adhesive,
Examples include acrylic HM adhesives, uncrosslinked unsaturated polyesters, acrylic adhesives, silicone adhesives, and post-cured acrylic adhesives. As the nature of the adherend,
For example, in the case of a hydrophilic surface, use this photocurable coating sheet directly or use one with an adhesive layer, and if the adherend is lipophilic in nature, use a photocurable coating sheet. It is preferable to use the curable coating sheet directly. Furthermore, when the adherend is water-repellent or oil-repellent (in the case of neither hydrophilic nor lipophilic properties), it is preferable to use one provided with a silicone adhesive layer. For adhesion to these adherends, the sheet composition may contain a block or comb-shaped copolymer, or it may be laminated to any adherend surface by laminating an adhesive layer. can.

(Effects) The photocurable coating sheet of the present invention is a photocurable sheet that has spreadability and flexibility at room temperature or under heating,
Forms a strong film after irradiation with light.

Therefore, before irradiation with light, it is possible to coat not only flat surfaces but also adherends having some unevenness or three-dimensional curved surfaces, and a good film without wrinkles can be formed.

This photocurable coating sheet can perform surface decorations equivalent to those currently applied to automobiles, home appliances, and building materials, as well as furniture and decorative accessories. In this molding, integral molding with resin can also be performed.

Usually, in the case of ultraviolet curing, there is no need to raise the temperature to high temperatures during curing, so it is optimally used as a post-curing coating sheet for adherends that have poor resistance to high temperatures, such as thermoplastic resin molded products.

(Example) The present invention will be specifically described below based on examples.

In addition, "part" means "part by weight."

1 large mouth = 300 parts of ethyl acetate, acrylic polyol (copolymer of methyl methacrylate, 2-hydroxyethyl methacrylate, and ethyl acrylate, MW = 12,000.7 g
35°C, OH value 80), 100 parts solid content, 40 parts 2-hydroxypropyl acrylate, and incyanate (Japan Polyurethane Kogyo Co., Ltd., Coronate L, NC0=
13°0%) as a solid content (approximately 55 parts of the total hydroxyl groups of the acrylic polyol and 2-hydroxypropyl acrylate)
(0% reaction) was mixed with stirring.

'-' The mixture was applied with an applicator to the release surface of a silicone release-treated polyethylene terephthalate film (hereinafter referred to as PET film), and dried for 10 minutes in a hot air dryer at 80°C to form a photocurable coating. A sheet was prepared.The thickness of the sheet was 1°0 μm, and no air bubbles were generated.

Next, this sheet has a radius of 10 cm, a height of 6 cm, and a bottom radius of 6 cm.
cm (D) The sheet was heated to 60"C and attached to a dish-shaped object made of acrylic resin using a vacuum press (dish-shaped mold).

This was irradiated with a high-pressure mercury lamp at 500 yaJ to form a cured coating. The hardness of this coating is H on the pencil hardness scale.
B. Adhesion was 100/100 in the l-width board test.

Real W 300 parts of ethyl acetate, acrylic polyamine (copolymer of methyl methacrylate, 2-aminoethyl methacrylate, and ethyl acrylate, M w = 45.000.7
g35°CSN H2 value SO) in solid content of 100 parts, 2
-40 parts of hydroxyethyl methacrylate, 40 parts of methyl acrylate, 22-dimethoxyacetophenone 1.
0 parts, and melamine crosslinking agent (Dainippon Ink Chemical Co., Ltd.,
Super Beckamine (butylated melamine resin) J-82
0-60) 118 parts by solid content (N of acrylic polyamine
jl) in which 30% of the total amount of OH groups of 2-hydroxyethyl methacrylate reacted with H2 groups were mixed with thorough stirring. This mixture was applied to the release surface of the PET film using an applicator and dried at 80'C for 20 minutes to produce a photocurable sheet. The thickness of the sheet was 120 μm, and no air bubbles were generated.

Next, this sheet was molded into a polystyrene hemisphere with a radius of 15 cm by vacuum contact molding (vacuum packaging molding) at 60°C.
The film was heated to 6 Torr, and the film was attached when the ultimate vacuum level reached 6 Torr. This was photocured by irradiating it with an ultraviolet lamp for 10 minutes at room temperature to create a coating.

The hardness of this coating was HB in terms of pencil hardness, and the adhesion was 1=100/100 in a width board test.

K Arashi Takuminori Acrylic Polyol (Nicalide H-870゜Mw=2
, 500, Tg-42℃, OH value 200) in solid content of 1
00 parts, 30 parts of 2-hydroquinepropyl acrylate,
30 parts of methyl methacrylate, and incyanate (
Made by Nippon Polyurethane Industries, Coronate LS NC0=1
3.0%), 80 parts solids (acrylic polyol and 2
- About 50 of the total hydroxyl groups of hydroxypropyl acrylate
% reaction) were mixed with thorough stirring. This mixture was applied with an applicator to the release surface of a PET film subjected to silicone release treatment, and heated in a hot air dryer at 80° C. for 20 minutes to produce a photocurable sheet. The thickness of the sheet is 1
The thickness was 20 μm, and no bubbles were generated.

Next, this sheet was heated to 60° C. and attached to a dish-shaped object made of ABS resin with a radius of 10 c'IT + 6 cm in height and a bottom radius of 6 cm using a vacuum press (dish-shaped mold). This was irradiated with a high pressure mercury lamp for 500 sJ to create a cured coating. The hardness of this coating was HB in pencil hardness, and the adhesion was 1007100 in a 111011 width board test.

Ratio m 300 parts of ethyl acetate, acrylic polyol (copolymer of methyl methacrylate, 2-hydroxyethyl methacrylate, and ethyl acrylate, Mw = 850,000,7
g35°C, 100 parts of OHHBO2 as solid content, 40 parts of 2-hydroxypropyl acrylate, and isocyanate (manufactured by Nippon Polyurethane Kogyo, Coronate L, NC0
= 13°0%) as a solid content (approximately 50% of the total hydroxyl groups of the acrylic polyol and 2-hydroxypropyl acrylate reacted) were mixed with thorough stirring.

An attempt was made to apply this mixture to the release surface of the PET film using an applicator, but the viscosity of the mixture became too high and could not be applied.

300 parts of ethyl acetate, acrylic polyamine (copolymer of methyl methacrylate, 2-aminoethyl methacrylate, and ethyl acrylate, Mw = 15.000, Tg 35
℃, 100 parts of NH2HBO8 as a solid content, blocked isocyanate (manufactured by Nippon Polyurethane Industries, Coronate 25
13, ethyl acetoacetate block NC0 = 10.2%)
31 parts (this crosslinking agent has an isocyanate group equivalent to 0.9 g relative to the amino group of the acrylic polyamine),
and melamine crosslinking agent (Dainippon Ink Chemical Co., Ltd., Super Beckamine (butylated melamine resin) J820-60)
Solid content: 28 parts (NH2 group) (30% initial hardening amount)
were mixed with thorough stirring. This mixture was applied with an applicator to the release surface of a PET film subjected to silicone release treatment, and dried for 5 minutes in a hot air dryer at 80° C. to produce a thermosetting sheet. At this time, the thickness of the sheet is 120
μm, and no bubbles were generated.

Next, this sheet was molded into a polystyrene hemisphere with a radius of 15 cm by vacuum adhesion molding (vacuum packaging molding) so that the sheet was bent at an angle of 60°.
It was heated to Cc and was attached when the ultimate vacuum level reached 6 Torr. An attempt was made to harden the sheet by placing it in an oven at 110° C. for 30 minutes, but the adherend was deformed and a good molded product could not be obtained.

that's all

Claims (1)

[Claims] 1. Acrylic resin having a weight average molecular weight of 2,000 to 800,000 and having a reactive functional group, a reactive compound having a reactive functional group and a reactive vinyl group, and reacting with the reactive functional group of the reactive compound. 1. A photocurable coating sheet comprising a sheet composition containing as main components a curing agent that can be used as a compound, and a photopolymerization initiator, and a reactive functional group of the reactive compound reacting with the curing agent.