JPH07268307A - Aqueous heat bonding type coating composition - Google Patents

Abstract

PURPOSE:To obtain the subject coating composition forming a coating film capable of protecting the surface of a base, having function as an adhesive for firmly bonding bases each other by thermal contact bonding. CONSTITUTION:This aqueous heat bonding type coating composition comprises 100 pts.wt. of a thermoplastic emulsion synthetic resin having >=80 deg.C) glass transition temperature, 3-80 pts.wt. of an epoxy emulsion resin and 3-100 pts.wt. of an aqueous phenol resin as a binder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to metal, plastic,
To exert a function as a protective agent by applying to the surface of various base materials such as inorganic materials, and to exert a strong adhesive force by heating and pressing the coated surfaces at any time after forming the coating film. The present invention relates to a water-based heat-adhesive coating composition capable of

[0002]

2. Description of the Related Art Conventionally, various coating materials have been widely used for the purpose of protection and beauty of various base materials, and usually, the base materials coated with such a coating are used with various adhesives. It is glued. However, it is troublesome to perform the coating work for the purpose of protection and beauty and the adhesive application work in the assembly process separately, and the coating film on the painted parts is not suitable for the assembly work, especially the adhesive work. There is a problem that it interferes with the bonding work of. For example, when processing a metal plate, pre-coating is performed to manufacture a pre-coated metal (PCM), and then the P
A two-step process of cutting the CM and assembling it by welding or bonding to commercialize it is necessary. Further, when a metal plate coated with a coating is welded, the coating burns to generate harmful gas, or the coating interferes with the welding, resulting in insufficient welding.
Further, when an adhesive is used, there is a problem that the coating film is disturbed and the adhesive strength becomes insufficient. Further, in order to solve the problem, if painting is performed after assembly processing, rust occurs on the metal plate during cutting, assembly and work, and if painting is performed after assembly processing, the shape of the product is complicated and the workability of painting is improved. There is a problem that it becomes very bad. However, in order to prevent the adverse effects of separately performing such coating and assembly with an adhesive, a composition having both the function of protecting the surface of the base material and the function of adhering the base materials together is sufficient. Not developed. For example, JP-A-64-48866 and JP-A-57-96073 disclose water-based heat-adhesive coating compositions capable of protecting the surface of a base material and adhering the base materials together. The coating film formed by the coating composition of
There is a problem that the adhesive strength is weak in a high temperature region of 00 ° C. or higher, and there is a restriction on usable articles.

[0003]

SUMMARY OF THE INVENTION The present invention solves the problems of conventional water-based heat-adhesive coating compositions and provides a coating composition capable of protecting the surface of a substrate and adhering the substrates together. With the goal. More specifically, it has a function as a protective agent that gives the base material an aesthetic appearance and further imparts durability such as corrosion resistance, water resistance, and chemical resistance, and strongly adheres the base materials together by thermocompression bonding. It is an object of the present invention to provide a water-based heat-adhesive coating composition which has a function as an adhesive and has a strong adhesive force even in a high temperature region of 100 ° C. or higher.

[0004]

DISCLOSURE OF THE INVENTION As a result of research conducted by the present inventors, a water-based heat-adhesive coating composition in which an emulsion of a predetermined thermoplastic resin and an epoxy resin is combined with an aqueous phenol and / or an aqueous acrylic silicone. It was found that the above problems can be solved by using a product. Therefore, the present invention provides (A) 100 parts by weight of a thermoplastic emulsion synthetic resin having a glass transition temperature of 80 ° C. or higher, (B) 3 to 80 parts by weight of an epoxy emulsion resin, and (C) an aqueous phenolic resin 3-1.
A water-based heat-bonding type coating composition containing 100 parts by weight as a binder is provided. Furthermore, the present invention provides (A) 100 parts by weight of a thermoplastic emulsion synthetic resin having a glass transition temperature of 80 ° C. or higher, (B) 3 to 80 parts by weight of an epoxy emulsion resin,
The present invention provides an aqueous heat-bonding type coating composition containing (C) an aqueous phenol resin in an amount of 3 to 100 parts by weight and (D) an aqueous acrylic silicone resin in an amount of 3 to 80 parts by weight. The ratio (parts by weight) of each component in the present invention is
This is the ratio of the actual resin solid content contained in each component. Hereinafter, the present invention will be described in detail.

In the present invention, as the component (A), the component (B),
A thermoplastic emulsion synthetic resin that does not react with the component (C) and the component (D) at room temperature can be used without particular limitation. For example, there are thermoplastic resins that are used in ordinary normally dry emulsion paints, and specific examples include poly (meth) acrylic acid ester copolymers, polyvinyl acetate copolymers, polyvinyl butyral copolymers. There are emulsion resins such as coalesce, polyvinyl chloride copolymer, and polyvinylidene chloride copolymer. Particularly, a poly (meth) acrylic acid ester copolymer emulsion, which has good compatibility with the component (B) and has a wide range of selection of characteristics, is suitable for the present invention. The component (A) of the present invention is obtained by an ordinary emulsion polymerization method by appropriately combining the constituent monomers that are usually used, and has a molecular weight of 10,000 to 1,000,000, preferably 30,000 to 50.
Ten thousand is appropriate.

Examples of constituent monomers used for preparing the poly (meth) acrylic acid ester copolymer emulsion are acrylic acid monomers having 1 to 8 carbon atoms of acrylic acid and 1 to 8 carbon atoms of methacrylic acid. 8 alkyl ester monomer (as the alkyl group, methyl, ethyl, n-butyl, isobutyl, ethylhexyl, propyl and the like are typically used),
Acrylic acid, acrylamide, N-methylol acrylamide, acrylonitrile, methacrylonitrile, methacrylic acid, hydroxyethyl methacrylate, styrene,
Examples include isobornyl methacrylate and cyclohexyl methacrylate. The poly (meth) acrylic acid ester copolymer-based emulsion can be produced by a usual emulsion polymerization method using these constituent monomers alone or in combination of two or more kinds. The glass transition temperature (hereinafter referred to as Tg) of the component (A) resin must be at least 80 ° C or higher, preferably 80 ° C or higher 20
It is suitable that the temperature is 0 ° C. or lower, and particularly preferably 100 ° C. or higher and 150 ° C. or lower. Tg of resin of component (A) is 80 ℃
If it is higher than the above, tackiness remains in the obtained coating film, and a blocking phenomenon such as when seeding substrates is easily caused, which may damage the coating film,
This is because the base material itself may be damaged in some cases. Also,
If this Tg is lower than 80 ° C., the adhesive force in a high temperature region of 100 ° C. or higher after thermocompression bonding is reduced, which is not desirable.
The upper limit of Tg is usually 200 ° C, which is lower than the thermocompression bonding temperature.
The following is suitable, and preferably 150 ° C or lower.

The component (B) used in the present invention is an epoxy emulsion resin which is liquid or solid at room temperature and contains two or more epoxy groups in one molecule. It is added to improve the rust resistance, etc., and to cause a cross-linking reaction with the component (C) at the time of baking to strongly bond the base materials. This epoxy emulsion resin is obtained by reacting a polyhydric alcohol or a polyhydric phenol with a halohydrin, and specific examples thereof include bisphenol A type, halogenated bisphenol A type, novolac type, and polyglycol type. , Bisphenol F type, epoxidized oil and the like. The epoxy equivalent of the epoxy emulsion resin is 150 to 500.
It is preferably 0, particularly 500 to 2000, and in view of blocking resistance and the like, a solid substance at room temperature is preferable. The molecular weight of the epoxy emulsion resin is 3
It is suitable to set it to 00 to 10000, preferably 1000 to 4000.

The epoxy emulsion resin is produced by a usual forced emulsification method by reacting a predetermined polyhydric alcohol or polyhydric phenol with halohydrin in the presence of an emulsifier. Examples of emulsifiers used here include polyoxyethylene alkylphenol ether nonionic surfactants, polyoxyethylene polyoxypropylene block polyethers, or the surfactants and / or
Alternatively, it is desirable to use an adduct of ethers and a diisocyanate compound, alone or in a blend.
Commercial products of epoxy emulsion resins produced by this method are listed as Evolution EA1, 2, 3, 7, 12,
20 and 55 (Kanebo NSC, trade name); Aquatote 205, 510, 3520, 3540, 3520
1, 5003, and 5520 (trade name, manufactured by Totoh Resin Co., Ltd.). Other representative epoxy resin commercial products include Epicoat # 1001, # 1004 and # 1.
007 (made by Yuka Shell Epoxy Co., Ltd., trade name); YD-0
11, 001, 001Z, 012, 014; ST-50
80, 5100; YDCN-701, 702, 703,
704 and YDPN-638 (trade name, manufactured by Tohto Kasei Co., Ltd.)
and so on.

The component (C) of the present invention is an aqueous phenolic resin, which improves the adhesion of the coating film to the substrate and further reacts with the components (A) and (B) during baking and thermocompression bonding, It is compounded in order to improve the Tg of the coating film by performing three-dimensional crosslinking. The phenolic resin used for preparing the aqueous phenolic resin is a resin obtained by reacting phenols with aldehydes such as formaldehyde or paraformaldehyde by a known method under a basic catalyst or an acidic catalyst. Examples of the phenols include P-cresol, O-cresol, P-tertbutylphenol, P-ethylphenol, bisphenol A, P-phenylphenol, and 2,3-xylenol. Examples of the phenolic resin include novolac type and resol type, and it is preferable to use the resol type in consideration of reactivity with the component (A) and the component (B). The molecular weight of the phenol resin is 30.
It is suitable to set it to 0-12000, preferably 1000-6000.

Commercially available products of the phenol resin are Tamanol 1010R, 520S, 521, 526 and 58.
1, 584 and 572S (manufactured by Arakawa Chemical Industry Co., Ltd., trade name); Shonor BKM-2620, BKS-35.
5, 2710C, 2750, CKM-908, 941,
1282, 1634, 2103, 2400, 2432,
And 5254 (manufactured by Showa High Polymer Co., Ltd.); Resitop PS-2607, 2772, 2780, 4900 and 2
980 (Gunei Chemical Industry Co., Ltd., trade name); HITanol 21
00, 2181, 2181S, 2181SL, 2300
N, 2306N, 2330N, 2353N, 2420,
2422, 2423A, 2426B and 643KN (manufactured by Hitachi Chemical Co., Ltd., trade name). In addition, the aqueous phenolic resin which is the component (c) of the present invention is produced by water-insoluble type other than water-soluble type in the presence of an emulsifier by a usual forced emulsification method or the like. Commercially available products of the aqueous phenolic resin include Hitanol 7007H (manufactured by Hitachi Chemical Co., Ltd., trade name); Yucarezin KE-910, 911 and 9
12 (manufactured by Yoshimura Oil Chemical Co., Ltd.); Tamanol 722 and 771 (manufactured by Arakawa Chemical Industry Co., Ltd.); PL-276
1 and 2975 (trade name, manufactured by Gunei Chemical Industry Co., Ltd.); BRE
-174 and CKE-2370 (manufactured by Showa High Polymer Co., Ltd.); Priofen 4302 (manufactured by Dainippon Ink and Chemicals, Inc.).

Examples of the resin other than the component (C) of the present invention which reacts with the component (A) and the component (B) and crosslinks three-dimensionally include melamine resin and benzoguanamine resin. These resins are coated. It is not preferable because it is oriented on the surface of the film to cause cross-linking, which lowers the adhesiveness. However, these resins may be added in a small amount, if necessary, in order to adjust the characteristics of the composition of the present invention. In addition, the components of the present invention
(B) and component (C) can be simultaneously emulsified by force. Component (D) of the present invention is an aqueous acrylic silicone resin. When the component (D) is added, a stable siloxane bond is formed between the molecules due to the condensation reaction of the alkoxysilyl group during baking, so that the adhesiveness in a high temperature region of 100 ° C. or higher can be further improved. The acrylic silicone resin of the present invention is, for example, an acrylic copolymer obtained by copolymerizing acrylic acid, methacrylic acid or a derivative thereof and a monomer having an alkoxysilyl group as a crosslinking component. Specific examples of the derivative of acrylic acid or methacrylic acid include methyl (meth) acrylate, ethyl (meth) acrylate,
Butyl (meth) acrylate, stearyl (meth) acrylate, glycidyl (meth) acrylate, (meth)
Acrylonitrile etc.

Specific examples of the alkoxysilyl group-containing monomer include vinyltrichlorosilane, vinyltris (β-methoxyethoxy) silane,
Vinyltriethoxysilane, vinyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane,
γ- (meth) acryloxyethyltrimethoxysilane,
γ- (meth) acryloxypropyltrimethoxysilane, γ- (meth) acryloxypropyltriethoxysilane, γ- (meth) acryloxypropyltripropoxysilane, γ- (meth) acryloxypropylmethyldimethoxysilane, γ- (Meth) acryloxypropylmethyldiethoxysilane, γ- (meth) acryloxypropylmethyldipropoxysilane, γ- (meth) acryloxybutylphenyldimethoxysilane, γ- (meth) acryloxybutylphenyldiethoxysilane, γ -(Meth) acryloxybutylphenyldipropoxysilane,
Examples include γ- (meth) acryloxypropyldimethylmethoxysilane, γ- (meth) acryloxypropylphenylmethylmethoxysilane, and γ- (meth) acryloxypropylphenylmethylethoxysilane.

The alkoxy silyl group-containing acrylic copolymer is a resin obtained by a known method such as block copolymerization, graft copolymerization or random copolymerization in the presence of a catalyst such as a transition metal. The aqueous acrylic silicone resin is produced by ordinary aqueous solution polymerization, emulsion polymerization, solution polymerization using an organic solvent, or the like. In the case of solution polymerization, it can be made aqueous by solvent replacement. The molecular weight of the water-based acrylic silicone resin is
It is suitable to be 1,000 to 500,000, preferably 3000 to 50,000. Commercially available water-based acrylic silicone resins include glass coat SW-135 (manufactured by Sanyo Kasei Co., Ltd.); Kanebinol KD-3, 4, 5,
20 and 30 (Kanebo SNC, trade name); LX-
854A1 (Hoechst Synthetic Co., Ltd., trade name) and the like. The composition of the present invention comprises components (A), (B) and (C) or component (A),
Using (B), (C) and (D) as a binder, an organic solvent (preferably a polar organic solvent) is preferably added in a proportion of 20% or less in the solvent to improve the coating appearance and coating workability. It is also possible to do so. Examples of this polar organic solvent include isopropyl alcohol, normal butanol, isobutanol, ethylene glycol monobutyl ether, diethylene glycol monobutyl ether, 3-methyl-3-methoxybutanol, ethylene glycol monotertiary butyl ether, propylene glycol monomethyl ether, propylene. Examples include glycol normal propyl ether. Further, if necessary, coloring pigments, extender pigments, rust preventive pigments or defoaming agents, surface conditioners,
It contains various additives such as a thickener, a pigment dispersant, a preservative, and a rust preventive.

In the composition of the present invention, the component (A), the component
The resin solid content weight ratio of component (B) and component (C) is 3 to 3 parts of component (B) per 100 parts by weight of component (A) in terms of resin solid content.
80 parts by weight, preferably 5 to 60 parts by weight, the component (C) is 3
It is suitable to blend in an amount of -100 parts by weight, preferably 5-60 parts by weight. If the amount of component (B) is less than 3 parts by weight, the adhesion of the coating film to the base material will be weak and the adhesive force will be reduced. Conversely, if the amount of component (B) is more than 80 parts by weight, the coating before thermocompression bonding will be performed. The physical properties of the film deteriorate, and the adhesive strength decreases. Also ingredients
If the amount of (C) is less than 3 parts by weight, the three-dimensional structure due to crosslinking will decrease, and the adhesive strength at high temperature (150 ° C) will decrease. On the contrary, if the amount of component (C) is more than 100 parts by weight, crosslinking will proceed. Too much, the Tg of the coating film becomes high, and the heat fusion of the coating film is hindered during thermocompression bonding, resulting in a decrease in the adhesive strength.

When the composition of the present invention contains the component (D), the weight ratio of the resin solids of the component (A), the component (B), the component (C) and the component (D) is 100 parts of the component (A). Ingredients per part by weight
(B) 3 to 80 parts by weight, preferably 5 to 60 parts by weight, components
(C) is 3 to 100 parts by weight, preferably 5 to 60 parts by weight,
The component (D) is used in an amount of 3 to 80 parts by weight, preferably 5 to 60 parts by weight. If the amount of component (B) is less than 3 parts by weight, the adhesion of the coating film to the base material will be weak and the adhesive force will be reduced. Conversely, if the amount of component (B) is more than 80 parts by weight, the coating before thermocompression bonding will be performed. The physical properties of the film deteriorate, and the adhesive strength decreases.
Further, if the amount of the component (C) is less than 3 parts by weight, the three-dimensional structure due to crosslinking is reduced and the adhesive strength at high temperature (150 ° C) is reduced. Too much, the Tg of the coating film becomes high, and the heat fusion of the coating film is hindered during thermocompression bonding, so that the adhesive strength is lowered. Also the ingredients
When the amount of (D) is less than 3 parts by weight, the stable siloxane bond formed by the condensation reaction of the alkoxysilyl group is small, so the adhesive strength at high temperature (150 ° C) does not improve, and conversely the component (D) If it is more than 80 parts by weight, the condensation reaction of the alkoxysilyl group proceeds too much, the physical properties of the coating film before thermocompression bonding deteriorate, and the thermal fusion at the time of thermocompression bonding is impaired, resulting in a decrease in adhesive strength. When the composition of the present invention is used as a paint, it is usually a spray, a flow coater,
It can be painted with a roll coater. For the purpose of imparting fluidity to the coating material, the solid content of the coating material is suitably 20 to 60%, preferably 30 to 50%.

[0016]

By applying the coating composition of the present invention, it is possible to form a coating film having the same corrosion resistance, water resistance, chemical resistance, etc. as conventional paints, and the surface to be coated can be coated at a necessary time. A strong adhesive force can be obtained simply by overlapping and heating and pressing each other. Therefore, by applying the coating composition of the present invention, to form a protective coating on the surface of the substrate,
In addition, since the base materials can be adhered to each other, the welding process or the adhesive application process is no longer required as in the past, which saves the process labor.
Improved safety and cost reduction can be achieved. further,
The coating film formed from the composition of the present invention has a strong adhesive force even at high temperature, and thus can be applied to various base materials.

[0017]

EXAMPLES The present invention will be described in detail below with reference to examples. In addition, "part" and "%" in the examples are based on weight. [Thermoplastic Emulsion Synthetic Resin (Component (A)]) The monomer mixture having the composition shown in Table 1 was emulsion polymerized in water by a conventional method to prepare thermoplastic emulsion synthetic resins (i) to (iii). [Epoxy Emulsion Resin] Commercially available epoxy ermajon resin shown in Table 2 was used. [Aqueous Phenolic Resin] Commercially available aqueous phenolic resins shown in Table 3 were used. [Aqueous acrylic silicone resin] Commercially available aqueous acrylic silicone resins shown in Table 4 were used.

[0018]

[Table 1] Table 1 ──────────────────────────────────── Plastic Emulsion Synthetic Resin No. (i ) (Ii) (iii) / Constituent monomer Methyl methacrylate 74-51 Styrene 15-15 Hydroxyethyl methacrylate--10 Acrylic acid 1-1 Ethyl acrylate 10-23 Isobornyl methacrylate-98- methacrylic acid-2- resin Tg ( ℃) 86 111 61 Elmajeong solid content (%) 40 30 40 40 ─────────────────────────────────── ─

[0019]

[Table 2] Table 2 ──────────────────────────────────── No. Resin type Product name Manufacturer name Epoxy equivalent Emulsion Solid content ──────────────────────────────────── Ibisphenol Evolution Kanebo 850-950 55% Type A EA55 NSC Robisphenol Aquatote Type A 3540 Tohto Resin Kako 1800 55% ────────────────────────────────── ───

[0020]

[Table 3] Table 3 ──────────────────────────────────── No. Resin type Product name Manufacturer name Form Solids ──────────────────────────────────── a Resol type Freihofen Dainippon Ink Water Dispersion Type 40% 4302 Chemical industry b Resole type Yukaresin Yoshimura Oil Chemicals Emulsion 50% KE-911 ──────────────────────────────── ─────

[0021]

[Table 4] Table 4 ──────────────────────────────────── Trade name Manufacturer fixed form ─────────────────────────────────── Kanebinol Kanebo NSC 35% KD-5 ──────── ─────────────────────────────

[Examples 1 to 6 and Comparative Examples 1 to 5] The components shown in Tables 5 and 6 were mixed by stirring, and the resulting water-based heat-adhesive coating composition (unit: part) was 0.8 × 75. A 150 mm polished mild steel plate (JIS G 3141) was spray-coated so that the dry film pressure was 10 μm, and baked and dried at 230 ° C. for 3 minutes. Each of the obtained coated plates was tested for blocking resistance, salt spray resistance and adhesive strength, and the results are shown in the lower column of Table 7. The test method is as follows. * Blocking resistance: Overlapping the coating surfaces of the coating plates cut into 40 x 40 mm, attach the cushion material and aluminum plate to the outside, apply pressure (20 kg / cm ² ) with a vise, and 80 ° C, 24 The presence or absence of blocking after standing for a time was examined. ○: No blocking, ×: Blocking * Salt spray resistance: Tested according to JIS K5400. ◯: When there is no abnormality in the coating film, ×: When spot rust or blistering occurs. Adhesive force (I): Layered so that the overlapping part of the coated surfaces of the coated plates cut to 20 × 50 mm becomes 20 × 10 mm. , Pressure 20
It was thermocompression bonded at 220 ° C. for 70 seconds at kg / cm ² . About the obtained bonded body, "Autograph S-20" manufactured by Shimadzu Corporation
00C ", the adhesive body temperature is 20 ℃ and the pulling speed is 3mm.
The shear adhesive strength was measured in minutes / minute. Adhesive strength (II): The shear adhesive strength was measured at a bonded body temperature of 150 ° C. in the same manner as in the above-mentioned adhesive strength (I).

[0023]

[Table 5] Table 5 ─────────────────────────────── Example 1 2 3 4 5 6 ──── ──────────────────────────── (A) (i) 100 100 growth (ii) 100 100 100 100 groups (iii) ─ ───────────────────────────── (B) (B) (A) 10 50 adults (B) 20 5 30 20 components ─── ─────────────────────────── a) 30 5 50 5 successful (b) 15 5 minutes ────────── ───────────────────── Acrylic silicone resin 5 50 ───────────────────────── ──────── Test Blocking resistance ○ ○ ○ ○ ○ ○ Test Salt water spray resistance ○ ○ ○ ○ ○ ○ Item Adhesion (I) (kg / cm ² ) 123 137 121 115 132 123 Eye Adhesion (II) (kg ^{cm 2) 52 57 51 55 67} 65 ────────────────────────────────

[0024]

[Table 6] Table 6 ─────────────────────────────── Comparative Example 1 2 3 4 5 ───── ────────────────────────── (A) (i) 100 100 (ii) 100 100 sets (iii) 100 ──── ───────────────────────── (B) (a) 10 30 100 C (b) 5 components ───────── ──────────────────── (C) (a) 30 30 120 Composition (b) 5 minutes ────────────── ─────────────── Acrylic silicone resin ─────────────────────────────── Blocking resistance × ○ ○ ○ ○ Test Salt water spray resistance ○ ○ × ○ ○ Item Adhesive strength (I) (kg / cm ² ) 125 132 73 20 5th adhesive strength (II) (kg / cm ² ) 21 13 8 6 0 ──────── ──────────────────────

As is apparent from Table 5, the composition of the present invention has excellent coating film performance and also has excellent adhesive strength after thermocompression bonding. On the other hand, as is clear from Table 6, Tg
Comparative Example 1 using a thermoplastic emulsion synthetic resin of less than 80 ° C. has poor blocking resistance and an adhesive body temperature of 1
The adhesiveness at 50 ° C was poor. In Comparative Example 2 which does not contain the aqueous phenolic resin, the adhesive body temperature is 150 ° C.
The adhesiveness in was poor. In Comparative Example 3 containing no epoxy emulsion resin, salt spray resistance was observed and rusting occurred, and the adhesiveness was poor at adhesive body temperatures of 20 ° C and 150 ° C. Comparative Example 4 in which the epoxy emulsion resin was excessive
Had significantly poor adhesiveness at an adhesive body temperature of 20 ° C and 150 ° C. Further, in Comparative Example 5 in which the amount of the aqueous phenol resin was excessive, the adhesiveness at the adhesive body temperatures of 20 ° C. and 150 ° C. was remarkably poor.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location C09D 163/00 PKH C09J 133/08 JDD 161/06 JFP

Claims (2)

[Claims] 1. A binder comprising 100 parts by weight of (A) a thermoplastic emulsion synthetic resin having a glass transition temperature of 80 ° C. or higher, (B) an epoxy emulsion resin of 3 to 80 parts by weight, and (C) an aqueous phenolic resin of 3 to 100 parts by weight. A water-based heat-bonding type coating composition containing as. 2. (A) 100 parts by weight of a thermoplastic emulsion synthetic resin having a glass transition temperature of 80 ° C. or higher, (B) an epoxy emulsion resin of 3 to 80 parts by weight, (C) an aqueous phenolic resin of 3 to 100 parts by weight and (D) ) A water-based heat-adhesive coating composition containing 3 to 80 parts by weight of an aqueous acrylic silicone resin as a binder.