JPH02223444A - Thermosetting sheet for covering - Google Patents

Abstract

PURPOSE:To cause the covering operation of a sheet to be easily achieved by a method in which the adhesive layer containing acryl adhesive, etc., is laminated on one surface of the coating layer containing specified solid reactive alkali resin and block isocyanate, thereby forming the sheet. CONSTITUTION:The adhesive layer containing acryl monomer and organic peroxide is laminated on one surface of the coating layer containing the solid reactive acryl resin with the weight-average molecular weight of 100000-1000000 and block isocyanate, whereby the thermosetting sheet for covering is formed. In another method, at least one of the reactive acryl oligomer with weight- average molecular weight of 10100-10000 and solid thermoplastic resin may be contained in said coating layer. The obtained thermosetting sheet for covering can cover sufficiently the surface of the article having some unevenness or curved surface without the occurrence of wrinkles.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is a coating that is applied to the surface of furniture, steel plates, etc. for mining, decoration, display, etc. It concerns the seat.

(Prior Art) Paint is generally used to decorate or display the surfaces of furniture, steel plates, etc.

However, when a solvent-based paint is used, the organic solvent evaporates during work, resulting in a poor work environment and an environmental health problem. When using a water-based paint, it does not harm the working environment, but there are also problems such as the drying time of the paint being long and the drying of the paint requiring a large amount of energy.

Therefore, recently, sheet-like adhesive materials based on polyvinyl chloride have been proposed. There is no need for drying. However, it is necessary to attach and contact the sheet, making it difficult to control heating and pressurization. In addition, since paper, textile fabric, nonwoven fabric, etc. are used as the sheet-like base material impregnated with the radical reaction initiator, when coating the surface of an article with uneven or curved surfaces, the composite sheet is difficult to stretch. It has the disadvantage that "wrinkles" tend to occur and it is difficult to form a good film on the surface of the article. Furthermore, before heating, the composite sheet does not have adhesive properties to the article, so when attaching the composite sheet to the surface of the article, it is necessary to mechanically temporarily fix the composite sheet to the article. In addition, in the sheet-like paint disclosed in JP-A-58-57472, the back side is not sticky at room temperature, so it is difficult to work when pasting it on the surface of an article. Moreover, when the article to which the sheet-like paint is applied becomes hot, the back surface becomes soft and the adhesiveness decreases. 1. Since the back surface is formed of a true melt layer, it has the disadvantage of insufficient hardness at room temperature or high temperature.

The present invention is intended to solve the above-mentioned drawbacks, and its purpose is to provide a cured surface with good spreadability and flexibility, and to provide a good coating even to the surface of an article having uneven or curved surfaces. It is an object of the present invention to provide a thermosetting coating sheet which can be easily coated, and which can form a uniform coating having excellent impact resistance and adhesion and high hardness after curing.

(Means for Solving the Problems) The thermosetting coating sheet of the first invention has a weight average molecular weight of 1
Acrylic adhesive, (meth)acrylic monomer and organic peroxide on one side of the coating layer containing solid reactive acrylic resin of 0 o, 000-1,00 o, o 00 and block incyanate. A pressure-sensitive adhesive layer containing the above is laminated, thereby achieving the above object.

The thermosetting coating sheet of the second invention has a weight average molecular weight of 1
00. A coating film containing at least one of a solid reactive acrylic resin of OOO~1.000.000, a blocked isocyanate, a weight average molecular weight i, a reactive acrylic oligomer of o o~10.000, and a solid thermoplastic resin. An adhesive layer containing an acrylic adhesive, a (meth)acrylic monomer, and an organic peroxide is laminated on one side of the layer, thereby achieving the above object.

The present invention will be explained in detail below.

The thermosetting coating sheet of the first invention is formed by laminating a pressure-sensitive adhesive layer on one side of a coating layer.

The coating layer has a weight average molecular weight of 100,000 to i, o o
o, o o.

The adhesive layer contains an acrylic adhesive, an acrylic monomer, and an organic peroxide.

The reactive acrylic resin contained in the coating layer is an acrylic polymer having a plurality of hydroxyl groups, amine groups, and/or carboxyl groups, and is a solid polymer at room temperature (25° C.). Such reactive acrylic resins include, for example, (meth)acrylic acid ester monomers, styrene derivative monomers, (meth)acrylic acid ester monomers having hydroxyl groups such as 2- and droxyethyl (meth)acrylate, and 2-amino It is obtained by copolymerizing a (meth)acrylic acid ester monomer having an amino group, such as ethyl (meth)acrylate, or a monomer having a carboxyl group, such as (meth)acrylic acid. The weight average molecular weight of the reactive acrylic resin can be changed depending on the conditions when performing a polymerization reaction using an initiator, and the reactive acrylic resin used in the first invention has a weight average molecular weight of 100, 000~t, o o o,
Those in the range o o o are selected. When the weight average molecular weight is less than 100.000, it becomes difficult for the obtained thermosetting coating sheet to maintain its sheet shape. Therefore, for example, when pasting is applied, sufficient elongation cannot be obtained during stretching, and cracks or cracks may occur in some cases. Conversely, if the weight average molecular weight exceeds 1.000,000, the composition with blocked isocyanate will have poor moldability, making it difficult to prepare a thermosetting corrugated sheet.

The blocked isocyanate contained in the coating layer is used as a heat-reactive curing agent for curing the reactive acrylic resin during heating. Here, blocked isocyanate refers to the incyanate group of an incyanate compound having two or more incyanate groups in the molecule,
It means a compound blocked with a blocking agent such as phenol, oxime, ε-caprolactam, or malonic acid ester. Examples of the above-mentioned isocyanate compounds include monomers such as tolylene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, and inphorone diisocyanate, or trimethylolpronohydrol adducts and incyanurate modified products thereof;
There are carbodiimide modified products.

In blocked isocyanate, the blocking agent is removed by heating, and the resulting incyanate group is the functional group of the reactive acrylic resin (the sum of the hydroxyl group, amine group, and carboxyl group. The functional group value is the hydroxyl value, amine group value, and acid The amino group value is a value determined by calculating the amount of amino groups added during polymerization in the same way as the hydroxyl value, or by reacting the amino groups with nitrous acid and converting them into hydroxyl groups. The amount of carboxyl groups added at the time is calculated in the same way as the amount of hydroxyl groups, or the amount of carboxyl groups is determined using KOH, etc.) to cause a crosslinking reaction.

The content of the blocked isocyanate is preferably adjusted so that the ratio of the functional groups contained in the acrylic polyol to the isocyanate groups contained in the blocked isocyanate is within the range of α5 to L5, and more preferably. ranges from 0.8 to 12.

A coating layer is formed from the composition of the solid reactive acrylic resin and block incyanate. When this coating layer is heated to a predetermined temperature or higher, the solid reactive acrylic resin and the block incyanate react to form a hard coating.

In addition, fillers, anti-aging agents,
A coloring agent and the like may also be contained. As the coloring agent, pigments, dyes, etc. used in ordinary painting can be used. For example, pigments include titanium oxide, iron oxide, carbon black,
Dyes such as cyanine pigments and quinacridone pigments include azo dyes, anthraquinone dyes, indigoid dyes, and stilbene dyes.Aluminum flakes,
Metal powder such as nickel powder, gold powder, silver powder, etc. may be added. When using a colorant with high hiding power, the total amount of colorant is 2 to 1 part by weight per 100 parts by weight of the solid content of the resin.
A range of 0.00 parts by weight is preferred.

The acrylic adhesive contained in the adhesive layer may be one that is generally used as an adhesive, for example, a copolymer of acrylate such as ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, etc. Vinyl acetate, acrylonitrile, ethylne, methyl methacrylate, etc. may be copolymerized, and methacrylic acid, acrylic acid, itaconic acid, hydroxyethyl (meth)acrylate, hydroxypropyl (
Polar polymers such as meth)acrylate, dimethylaminoethyl methacrylate, acrylamide, methylol acrylamide, glycidyl methacrylate, and maleic anhydride may be copolymerized.

In addition, examples of the (meth)acrylic monomer contained in the adhesive layer include monofunctional type monomers such as phenoxydiethylene glycol acrylate, phenoxypolyethylene glycol acrylate, β-acryloyloxypropyl hydroquinone phthalate, and nonylphenoxyethyl acrylate; Polyfunctional group types such as neopentyl glycol dimethacrylate, tripropylene glycol diacrylate, 2,2-bis[4-(acryloxyφjetoxy)phenyl]propane, trimethylolpronochloride triacrylate, tetramethylolmethanetetraacrylate, etc. are used.

When the amount of (meth)acrylic monomer added decreases, the hardness of the sheet obtained decreases, and conversely, when the amount of the (meth)acrylic monomer added decreases, unreacted 7-mer remains, resulting in a decrease in the hardness of the sheet, making it unusable. Therefore, it is preferable to add 100 to 600 parts by weight per 100 parts by weight of the acrylic pressure-sensitive adhesive (solid content).

The organic peroxide contained in the adhesive layer may be one that decomposes at the temperature at which the sheet is heated and cured, for example,
1,1-bis(t-butylperoxy)3,3.5-)
Limethylcyclohexane, t-butylperoxybenzonate, 2,5-diethyl-2,5-di(t-butylperoxy)hexane, and the like can be mentioned.

The amount of organic peroxide added may be set to an amount that can polymerize the above (meth)acrylic monomer;
The amount is 0.1 to 5 parts by weight per 100 parts by weight of the acrylic thread.

An adhesive layer is formed from a composition containing the acrylic adhesive, an acrylic monomer, and an organic peroxide. The adhesive layer may contain the filler, anti-aging agent, coloring agent, rust preventive, etc. used in the coating layer, if necessary. The pressure-sensitive adhesive layer thus obtained has tackiness in a state before curing, and adheres well to the above-mentioned coating layer, as well as to the surface of an article. In addition, when the adhesive layer is heated to a predetermined temperature or higher, the acrylic monomer reacts to form a hard film.

The thermosetting coating sheet of the second invention is formed by laminating a pressure-sensitive adhesive layer on one side of a coating layer, similarly to the first invention. The coating layer has a weight average molecular weight of 20o, ooo~800.
000 solid reactive acrylic resin and blocked isocyanate, and a weight average molecular weight of 1.000 to 10.0.
00 reactive acrylic oligomer and a solid thermoplastic resin.

The above-mentioned reactive acrylic oligomer is used to obtain flexibility and elongation of the coating layer, and when the weight average molecular weight of the reactive acrylic oligomer is less than 1,000, the resulting thermosetting coating sheet The flexibility of the adhesive decreases, and the adhesive is more likely to crack or crack during work. Conversely, if the weight average molecular weight is 10. If it exceeds OOO, no plasticizing effect will be produced. The reactive acrylic oligomer is preferably added in an amount of 1 to 100 parts by weight, more preferably 1 to 50 parts by weight, based on 100 parts by weight of the solid content of the reactive acrylic resin. When the amount of oligomer added is small, the flexibility of the thermosetting coating sheet becomes poor. Conversely, when the amount increases, the viscosity decreases and fluidity increases, making it difficult to maintain the sheet shape.

The above-mentioned solid thermoplastic resin is used to improve the flexibility of the thermosetting coating sheet, reduce the occurrence of cracks, etc. when handling the sheet, and improve handling properties.Reactive acrylic resin For example, acrylic resins, polyester resins, polyvinylidene fluoride resins, styrene resins, and polyvinyl chloride resins are preferably used. The thermoplastic resin is a reactive acrylic resin with a solid content of 100
It is preferably added in an amount of 1 to 30 parts by weight, more preferably 5 to 20 parts by weight. If the amount of the thermoplastic resin added is less than 1 part by weight, it is not possible to expect much improvement in flexibility, and if the amount added is more than 30 parts by weight, the spreadability and hardness of the sheet will be poor.

Incidentally, the above-mentioned reactive acrylic oligomer and thermoplastic resin may be used alone or in combination.

The above-mentioned blocked isocyanate contained in the coating layer is used to cure the reactive acrylic resin and the reactive acrylic oligomer, and the functional groups (same as the reactive acrylic resin) contained in the prolyl oligomer and the blocked isocyanate are used to cure the reactive acrylic resin and the reactive acrylic oligomer. The ratio to the included incyanate group is 0.5 to
It is preferably adjusted to 15, more preferably in the range of 0.8 to 12.

The thermosetting coating sheet constructed in this manner may be manufactured by any method. For example, the above-mentioned coating layer components are mixed uniformly, this mixture is applied onto a film that has been subjected to a release treatment with a silicone release agent, and is dried to form a coating layer. Next, a pressure-sensitive adhesive layer composition in which the pressure-sensitive adhesive layer components described above are uniformly mixed is applied to the surface of this coating layer, and the pressure-sensitive adhesive layer composition is dried. The temperature in each of the above drying steps is below the decomposition temperature of the blocked isocyanate and the organic peroxide.

The thickness of the thermosetting coating sheet obtained can be adjusted depending on the purpose.

(Example) The present invention will be described in detail below based on embodiments.

Examples 1 to 6 Acrylic polyol (manufactured by Nippon Shokubai ■, Arotan 2040
-145; glass transition temperature 40°C, weight average molecular weight 33
9,0OOOH value 80) as a solid content of 100 parts by weight (hereinafter simply referred to as parts) and blocked incyanate (manufactured by Takeda Pharmaceutical Co., Ltd., Tagnate B815N, NCO% 7.3; oxime block form of hydrogenated diphenylmethane diisocyanate). 49 parts of solids were mixed with stirring. This mixture was applied to the release surface of a silicone release-treated polyethylene terephthalate film (manufactured by Soi Kako ■, film thickness 40 μm) so that the film thickness after drying was 100 μm.
It was dried at 70° C. for 1 hour to obtain a coating layer.

On the other hand, β-acryloyloxypropyl hydrogen phthalate (Shin Nakamura Chemical Co., Ltd.) was added to an acrylic adhesive (17 parts of Corone L45, manufactured by Nippon Polyurethane Industries Ltd., was added to 100 parts solid content of P44 manufactured by Soken Chemical Co., Ltd.). ■
manufactured by Shin Nakamura Chemical, ACB20G), phenoxydiethylene glycol acrylate (manufactured by Shin Nakamura Chemical, AMP20G), or nonylphenoxyethyl acrylate (manufactured by Shin Nakamura Chemical, manufactured by Shin Nakamura Chemical, AMP20G).
NPAIOG) and 1,1-bis(t-butylperoxy)3,3.5-trimethylcyclohexane (manufactured by NOF Corporation, NPAIOG) were added in the amounts shown in Table 1,
Mixed with stirring. This adhesive layer composition is applied to the surface of the coating layer so that the film thickness after drying is 30 μm, and dried at 70°C for 1 hour to form an adhesive layer. A covering sheet was obtained.

The sheet was pressure-pressed onto the painted steel plate so that the adhesive layer of this sheet was attached to the surface of the painted steel plate, the polyethylene 7 tallate film was peeled off, and then heated at 160°C for 30 minutes.
It was heated and cured for 0 minutes. After curing, the coating was subjected to a pencil hardness test at 25°C and 80°C, respectively, and adhesion was measured based on a base grain test. In addition, the pencil hardness test is J
Measured according to IS K5400. Adhesion was determined by making 100 cuts at Iff intervals on the surface of the cured thermosetting coating sheet, pasting a commercially available adhesive tape on the surface, and then peeling off the tape to determine whether or not the base pieces remained. Expressed in %. The results are shown in Table 1.

(Margins below) Table 1-1 Table 1 Examples 7 to 12 Acrylic polyol (Alotane 2040- manufactured by Nippon Shokubai ■)
145) in solid content, made of acrylic polyol oligomer, dicalide H870, OH value 200) solid content 30
86 parts of block incyanate (manufactured by Takeda Pharmaceutical Co., Ltd., Takene B815N) solids were mixed with stirring. This mixture was applied to a silicone release-treated polyethylene terephthalate film (manufactured by Soken Kako ■, film thickness: 40 mm).
It was coated on the mold release surface of 100 μm to give a film thickness of 100 μm after drying, and dried at 70° C. for 1 hour to obtain a coating layer.

Next, a thermosetting coating sheet was obtained in the same manner as in Example 1, except that the pressure-sensitive adhesive layer composition having the composition shown in Table 2 was used.

The obtained thermosetting coating sheet was cured in the same manner as in Example 1, and the pencil hardness and adhesion of the coating were measured. The results are shown in Table 2.

(Margin below) Table 2 As shown in Table 2, the thermosetting coating sheets obtained in Examples 7 to 12 were cured in the same manner as the pencil hardness and adhesion of the coating. It was measured. The results are shown in Table 3.

Both were good.

Table 3-1 Acrylic polyol (manufactured by Nippon Shokubai ■, Arotan 2040
-145) in solid content of 100 parts, blocked isocyanate (manufactured by Takeda Pharmaceutical Co., Ltd., Tagnate B815N) solid content of 49 parts, acrylic resin (manufactured by Kyowa Gas Chemical Co., Ltd., /(
10 parts of lappet beads (GIP8 or El-1000P) and 100 parts of ethyl acetate were added and mixed with stirring.

This mixture was subjected to silicone release treatment to form a polyethylene terephthalate film (manufactured by Soken Kako ■, film thickness 40 μm).
) was coated on the mold release surface so that the film thickness after drying was 100 μm, and dried at 70° C. for 1 hour to obtain a coating layer.

Next, a thermosetting coating sheet was obtained in the same manner as in Example 1, except that the pressure-sensitive adhesive layer composition having the composition shown in Table 3 was used.

The obtained thermosetting coating sheets were prepared as shown in Example 1 and Table 3-2.
-145) 100 parts solids, acrylic polyol oligomer acupuncture, Nikalai) H870) solids 30 parts, blocked isocyanate (Takeda Pharmaceutical Company Ltd., Takenate B81)
5N) solid content: 86 parts, acrylic resin (manufactured by Kyowa Gas Chemical Industry ■, Herabet Peas GIP8 or El (-10
00F) and 100 parts of ethyl acetate were added and mixed with stirring. This mixture was applied to the release surface of a silicone release-treated polyethylene terephthalate film (manufactured by Soken Kako ■, film thickness 40μm) so that the film thickness after drying was 100μm.
It was coated to give a coating layer and dried at 70°C for 1 hour* to obtain a coating layer.

Next, a thermosetting coating sheet was obtained in the same manner as in Example 1 except that the pressure-sensitive adhesive layer composition having the composition shown in Table 4 was used.

The obtained thermosetting coating sheet was cured in the same manner as in Example 1, and the pencil hardness and adhesion of the coating were measured. The results are shown in Table 4.

From the results in Table 4, it was found that the thermosetting coating sheets obtained in Examples 19 to 24 had good hardness and adhesion.
imed.

In the same coating layer as in Examples 1, 7, 13, and 19, 100 parts solids of an acrylic pressure-sensitive adhesive [P44 manufactured by Soken Kagaku ■] was added to L7 of Coronate L45 (manufactured by Nippon Polyurethane Industries ■). Table 5 shows the results of the pencil hardness and adhesion of the thermosetting coating sheet obtained in the same manner as in Example 1, except that only 100% of the thermosetting sheet was laminated.

From the results in Table 5, it can be seen that the adhesiveness of the sheets obtained in Comparative Examples 1 to 4 was equivalent to that of the sheets obtained in the above-mentioned Examples, but the hardness showed a considerably low value.

Comparative Example 5 As an acrylic polyol, Alotane 2040-134 with a small weight average molecular weight (manufactured by Nippon Shokubai ■, average molecular weight 9
A mixture was obtained in the same manner as in Example 1, except that a mixture of 30% and 300% and OH value of 120) was used, and the same test as in Example 1 was conducted, but it was difficult to maintain the sheet shape.

Comparative Example 6 Heat treatment was carried out in the same manner as in Example 1, except that Alotane 2040-144 (manufactured by Nippon Shokubai ■, weight average molecular weight 10a, 900), which has a large molecular weight, was used as the acrylic polyol oligomer used in the coating layer. A curable coating sheet was obtained, and the same test as in Example 1 was conducted. The obtained thermosetting coating sheet did not have 100% elongation.

Examples 25-30 To 300 parts of ethyl acetate, 26 to 26 parts of reactive acrylic resin (copolymer of methyl methacrylate, methacrylic acid, and 2-aminoethyl acrylate, Mw = 492,000,
Tg 35℃, C0OH number 40 and NHm number 40) Solid content 1
00 parts by weight, 34 parts by weight of blocked isocyanate (manufactured by Shikinichi Yakuhin Kogyo, Takune) B-87ON, oxime block NGO of inphoron diisocyanate = 12.6% (this crosslinking agent is added to the functional group of the above-mentioned reactive acrylic resin). To the mixture, Qg equivalent of isocyanate groups) was added and mixed with stirring. This mixture was applied to the release surface of a silicone release-treated polyethylene terephthalate (PET) film using an applicator and dried at 80° C. for 5 minutes to produce a thermosetting sheet. The thickness of the sheet is 80μ
It was m.

On the other hand, β-acryloyl ogiciprobyl hydrogen 7 tallate (new Nakamura Chemical ■, ACB200), phenoxydiethylene glycol acrylate (lfr Nakamura Chemical ■, AMP2)
0G) or nonylphenoxyethyl acrylate (
Shin Nakamura Chemical ■, NPAIOG) and 1.1-bis (t
-butylperoxy) 3,3.5-trimethylcyclohexane (manufactured by NOF ■, /Hexa 3M) in the amounts shown in Table 6 were added and mixed with stirring. This adhesive layer composition is applied to the surface of the coating layer so that the film thickness after drying is 30 μm, and dried at 70°C for 1 hour to form an adhesive layer. A covering sheet was obtained.

The sheet was pressure-pressed onto a painted steel plate so that the adhesive layer of the sheet was attached to the surface of the painted steel plate, the polyethylene terephthalate film was peeled off, and then the sheet was cured at 160° C. for 30 minutes. After curing, the coating was subjected to a pencil hardness test at 25°C and 80°C, respectively, and adhesion was measured based on a base grain test. Note that the pencil hardness test was measured according to JIS K5400.

Adhesion is determined by applying I to the surface of the cured thermosetting coating sheet.
100 cuts of IIg intervals were made in the shape of the base, a commercially available adhesive tape was pasted on the surface of the base, the tape was then rated, and the remaining % of the base cut was expressed. Table 6 shows the results.
It was shown to.

Table 6-1 Table 6-2 300 parts by weight of ethyl acetate was added with a reactive acrylic resin (copolymer of methyl methacrylate, methacrylic acid, and 2-amino/ethyl acrylate, Mw = 565.000, Tg
35℃, C0OH value 40 and NH2 value 40), solid content 10
0 parts by weight, reactive acrylic oligomer (copolymer of methyl acrylate, 2-methacrylate and droxyethyl, butyl acrylate, methacrylic acid, Mw 4.000)
．． Tg-10°C, 01 value 100, CoOH value 40), solid content 30 parts by weight, blocked isocyanate (manufactured by Shikinichi Pharmaceutical Co., Ltd., Kukenate B-815N1, ketoxime block of hydrogenated diphenylmethane diisocyanate N G O7
, 3%) 75 parts by weight (this crosslinking agent is 1% to the functional groups of the above-mentioned reactive acrylic resin and reactive acrylic oligomer)
0 equivalents of incyanate groups) were mixed with good stirring. This mixture was applied with an applicator to the release surface of a polyethylene terephthalate (PET) film subjected to silicone release treatment, and dried at 80° C. for 5 minutes to prepare a thermosetting sheet. The thickness of the sheet was 80 μm. (manufactured by Soken Kako ■, film thickness 40 μm) was coated on the release surface so that the film thickness after drying was 100 μm, and dried at 70° C. for 1 hour to obtain a coating layer.

Next, a thermosetting coating sheet was obtained in the same manner as in Example 1, except that the pressure-sensitive adhesive layer composition having the composition shown in Table 7 was used.

The obtained thermosetting coating sheet was cured in the same manner as in Example 1, and the pencil hardness and adhesion of the coating were measured. The results are shown in Table 7.

Table 7-1 Table 7-2 As shown in Table 7, the thermosetting coating sheets obtained in Examples 31 to 36 had good pencil hardness and adhesion.

Examples 37 to 42 300 parts by weight of ethyl acetate was added with a reactive acrylic resin (copolymer of methyl methacrylate, 2-hydroxyethyl methacrylate, and ethyl acrylate, Mw = 250,00
0, Tg 15℃, OH value 40 and CoOH value 20)
100 parts by weight of Type I, 20 parts by weight of the reactive acrylic oligomer (same as above) as a solid content, and 54 parts by weight of Glock incyanate (same as above) (this crosslinking agent is a functional group between the above reactive acrylic resin and the reactive acrylic oligomer). (having LO equivalent of isocyanate groups) were mixed with thorough stirring. This mixture was applied by applicator to the release surface of a PET film that had been subjected to silicone release treatment, and dried at 80 DEG C. for 5 minutes to produce a thermosetting sheet. The thickness of the sheet was 100 μm.

The obtained thermosetting coating sheet was cured in the same manner as in Example 1, and the pencil hardness and adhesion of the coating were measured. The results are shown in Table 8.

Table 8-1 Table 8 It was in good condition.

(Effects of the Invention) The structure of the thermosetting coating sheet of the present invention is as described above, and it has excellent spreadability and flexibility when the sheet is below the curing temperature. It can be coated well on the surface of an article without causing "wrinkles".

Moreover, since the adhesive layer can be attached to the surface of the article, the sheet coating operation is easy. In addition, the thermosetting coating sheet can form a strong and uniform coating with excellent hardness and abrasion resistance by curing both the coating layer and the adhesive layer by heating.

that's all

Claims (1)

[Claims] 1. Weight average molecular weight 100,000 to 1,000,00
An acrylic adhesive, (
A thermosetting coating sheet on which an adhesive layer containing a meth)acrylic monomer and an organic peroxide is laminated. 2. Weight average molecular weight 100,000 to 1,000,00
0 solid reactive acrylic resin, blocked isocyanate, and at least one of a reactive acrylic oligomer with a weight average molecular weight of 1,000 to 10,000, and a solid thermoplastic resin. A thermosetting coating sheet on which a pressure-sensitive adhesive layer containing a (meth)acrylic monomer, a (meth)acrylic monomer, and an organic peroxide is laminated.