JPS62250076A - Resin composition for coating compound - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a coating resin composition that has excellent adhesion to metal surfaces, particularly aluminum-based metals and stainless steel, and more specifically relates to a coating resin composition that has excellent adhesion to metal surfaces, particularly aluminum-based metals and stainless steel. The present invention relates to a resin composition for coating that exhibits excellent adhesion to metal surfaces and comprises a polymer and a compound containing a 2,2,6,6-tetra-substituted piperidinyl group.

[Conventional technology and its limitations]

In recent years, fluoroolefin-based copolymers containing hydroxyl groups have been developed as cross-linked resins that have excellent weather resistance and are soluble in solvents.These copolymers are mainly used in paints when combined with curing agents that are reactive with the hydroxyl groups. used for.

However, such paints have poor adhesion after a hot water immersion test when applied to metal surfaces, such as aluminum-based metals, stainless steel, and the like. Therefore, when coating such substrates, it is necessary to first apply a primer to such substrates and then apply the composition containing the fluoroolefin copolymer, which poses problems in terms of workability. Ta.

[Problem that the invention seeks to solve]

The present inventors have conducted extensive research to solve the above-mentioned problems, and have found that by adding a compound containing a 2,2,6,6-tetramethylpiperidinyl group as an additive, the metal surface, especially aluminum, can be improved. It was discovered that the adhesion to stainless steel and other metals can be significantly improved, and the present invention was completed.

[Structure of the invention]

To summarize the present invention, the present invention comprises (A): a solution of a fluoroolefin coelectrolyte containing a hydroxyl group, (B): a curing agent that is reactive with a hydroxyl group, and (C): 2
, a compound containing a 2,6,6-tetra-substituted piperidinyl group, and has good adhesion to metal surfaces, especially aluminum metals and stainless steel, without a primer. .

Hereinafter, the configuration of the present invention will be explained in detail.

First, the components constituting the resin composition for coating according to the present invention, that is, the aforementioned components (A), (B), and (C) will be explained.

(i) Regarding the solution (A) component of a fluoroolefin copolymer having a hydroxyl group; The solution (A) component of a fluoroolefin copolymer containing a hydroxyl group refers to tetrafluoroethylene, chlorotrifluoroethylene, trifluoroethylene, Fluoroolefins such as ethylene, vinylidene fluoride, monofluoroethylene, hexafluoropropylene, or (per)fluoroalkyl trifluorovinylether [however, the number of carbon atoms in the (per)fluoroalkyl group is 1 to 4] are essential monomers. A copolymer as a body component, the main chain and/or
Alternatively, it refers to a copolymer containing a hydroxyl group bonded to a side chain dissolved in a solvent.

Typical such solvents include aromatic hydrocarbons such as toluene, xylene, and benzene; aliphatic hydrocarbons such as hexane, octane, cyclopentane, and cyclohexane; methanol, ethanol, n-propanol,
Isopropanol, n-butanol, isobutanol,
Alcohols such as t-butanol, amyl alcohol, cyclohexanol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, and ethylene glycol monobutyl ether; Ester systems such as methyl acetate, ethyl acetate, butyl acetate, and ethylene glycol monoethyl ether acetate: Examples include ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, methyl amyl ketone, and cyclohexanone, and these can be used alone or in a mixture of two or more.

To prepare the solution (A) of the fluoroolefin copolymer of the present invention, (υ copolymerize a vinyl monomer containing a hydroxyl group with the fluoroolefin described above in a solvent such as the one described above; After copolymerizing a vinyl monomer containing a hydroxyl group with the above-described fluoroolefins by an emulsion polymerization method or a suspension polymerization method, water is replaced with an organic solvent such as the above; or Conventionally known methods such as saponifying a polymer obtained by copolymerizing with olefins and dissolving it in the above-mentioned solvents can be applied, but solution polymerization method (2) is particularly convenient.

Examples of the vinyl monomer containing a hydroxyl group that can be used in preparing the copolymer solution (A) component by the method (2) described above include hydroxyethyl vinyl ether, hydroxypropyl vinyl ether, hydroxybutyl vinyl ether, and hydroxyhexyl vinyl ether. Hydroxyalkyl vinyl ethers are particularly preferred;
In addition, β-hydroxyethyl (meth)acrylate, β-hydroxypropyl (meth)acrylate, β-
(meth) such as hydroxybutyl (meth)acrylate
Hydroxyalkyl esters of acrylic acid can also be used within a range that does not reduce copolymerizability.

Further, in the present invention, when preparing the copolymer solution (A) component from the above-mentioned fluoroolefins and the vinyl monomer containing a hydroxyl group, it is possible to use other copolymerizable monomers. can. Such monomers include ethyl vinyl ether, n-propyl vinyl ether, 1s
Alkyl or cycloalkyl vinyl ethers such as o-propyl vinyl ether, n-butyl vinyl ether, iso-butyl vinyl ether, t-butyl vinyl ether, lauryl vinyl ether, octadecyl vinyl ether, 2-chloroethyl vinyl ether or cyclopentyl vinyl ether, cyclohexyl vinyl ether, methylcyclohexyl vinyl ether;
2,2,3.3-tetrafluoropropyl vinyl ether, 2,2,3,3,4,4,5,5-octafluoropentyl vinyl ether, 2,2,3°3.4,4,
5,5,6,6,7,7,8,8,9.9-hexadecafluorononyl vinyl ether, trifluoromethyl vinyl ether, pentafluoroethyl vinyl ether,
(Per)fluoroalkyl vinyl ethers such as heptafluoropropyl vinyl ether, heptadecafluorooctyl vinyl ether, undecafluorocyclohexyl vinyl ether; vinyl acetate, vinyl propionate, vinyl butyrate, vinyl isobutyrate, vinyl pivalate, vinyl cyclohexanecarboxylate, benzoic acid vinyl, p-
Carboxylic acids such as vinyl tert-butylbenzoate, vinyl esters of aliphatic monocarboxylic acids with branched alkyl groups of Cll-09, vinyl caproate, vinyl caprate, vinyl caprylate, vinyl laurate, or vinyl stearate. Vinyls: Olefins or chloroolefins such as ethylene, propylene, vinyl chloride or vinylidene chloride; (meth)acrylics such as methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate or cyclohexyl (meth)acrylate There are acid esters, etc.

Among the above copolymerizable monomers, it is preferable to use at least one selected from the group consisting of cycloalkyl vinyl ethers, alkyl vinyl ethers, and carboxylic acid vinyl esters in order to increase the conversion rate of fluoroolefins.

In addition, when using carboxylic acid vinyl ester together,
04-C1 from the viewpoint of hardness and flexibility balance of cured coating film
It is particularly preferred to use at least one member selected from the group consisting of vinyl esters of aliphatic monocarboxylic acids having a branched alkyl group, vinyl cyclohexanecarboxylate, vinyl benzoate, and vinyl pt-butylbenzoate. preferable.

In order to prepare a copolymer solution (A) component from the fluoroolefin, hydroxyalkyl vinyl ether, and other copolymerizable monomer components, the copolymer is copolymerized in the presence of a radical polymerization initiator in the solvent as described above. It is sufficient to perform polymerization.

The number average molecular weight of the fluoroolefin copolymer containing hydroxyl groups obtained in this way is 1.000 to 1.
The hydroxyl value of the solid content is preferably within the range of 17 to 200.

(it) About the curing agent (B) component that is reactive with hydroxyl groups; Next, typical curing agent (B) components that are reactive with hydroxyl groups include aminoplast, polyisocyanate compounds, and block polyisocyanate compounds. , polybasic acids, polybasic acid anhydrides, etc.

Among them, typical aminoplasts include amino group-containing compound components such as melamine, urea, acetoguanamine, benzoguanamine, steroguanamine, or spiroguanamine, and aldehyde compounds such as formaldehyde, paraformaldehyde, acetaldehyde, or glyoxal. Examples include condensates obtained by reacting these condensates with conventionally known methods, and those obtained by etherifying these condensates with alcohol, which are usually used for paints. If it is something,
Of course, either can be used.

Among these, those partially or completely etherified with alcohols 01 to C4 are preferable, and specific examples of such aminoplasts include hexamethyl etherified methylolmelamine, hexabutyl etherified methylolmelamine, and methylbutyl mixed etherified Methylolmelamine, methyletherified methylolmelamine, butyl etherified methylolmelamine or 1so-
Examples include butyl etherified methylolmelamine and condensates thereof.

In particular, from the viewpoint of compatibility with the fluoroolefin copolymer, it is desirable to use methyl etherified methylolmelamine.

Next, typical examples of polyisocyanate compounds include aliphatic diisocyanates such as hexamethylene diisocyanate and trimethylhexamethylene diisocyanate; cycloaliphatic diisocyanates such as xylylene diisocyanate and isophorone diisocyanate; or tolylene diisocyanate, 4,4 Organic diisocyanates such as aromatic diisocyanates such as '-diphenylmethane diisocyanate, adducts of these organic diisocyanates with polyhydric alcohols, low molecular weight polyester resins, water, etc., polymers of the above organic diisocyanates, and isocyanate biurets. Examples of typical commercially available polyisocyanate compounds include Parnock D-7.
50, -800, DN -950, -970, -980
, -981 or 15-455J [Dainippon Ink & Chemicals Product], "Dismodule L.

N, HL or ILJ (West German Bayer product),
[Takenate D-102, -202, -11ON or 1123NJ [Takeda Pharmaceutical Product], Coronate L, HL, EH or 203J (Japan Polyurethane Product) or [Duranate 24A-90c]
xJ (M Kasei Kogyo ■ product), etc.

On the other hand, typical examples of blocked polyisocyanate compounds refer to those obtained by blocking the various polyisocyanate compounds described above with known and commonly used blocking agents, and representative commercially available products of such blocked polyisocyanate compounds. For example, [Parnock D-5
50J (Dainippon Ink Chemical Industry ■ product), [Takenate B-815-NJ [Takeda Pharmaceutical ■ product], ``ADDITOL'' VXL-80J [Hoechst Synthesis ■ product] or [Coronate 2507J (Japan Polyurethane Industry ■ product) ) etc.

Among these polyisocyanates or block polyisocyanate compounds, "Coronate 250" is particularly preferred from the viewpoint of compatibility with the fluoroolefin copolymer.
7 or EH Burnock DN-980 or -981”
Compounds having an isocyanurate ring in the molecule are desirable.

Examples of polybasic acid curing agents include - acrylic resins having two or more carboxyl groups in the molecule, - polyester resins or trimellitic acid having two or more carboxyl groups in the molecule.

Furthermore, examples of polybasic acid anhydride curing agents include acrylic resins having two or more carboxylic anhydride groups in one molecule, trimellitic anhydride, pyromellitic anhydride, and the like.

(in) Regarding the compound (C) component containing a 212,616-tetra-substituted piperidinyl group; Next, the 2,2,6,6-tetra-substituted piperidinyl group, which is an additive for improving adhesion used in the present invention. The compound (c) component containing at least the 2nd and 6th positions
Refers to a compound containing a piperidine ring in which four hydrogen atoms on the carbon atoms at the 2- and 6-positions are substituted with organic groups.
At the same time, at least one of the seven hydrogen atoms on the nitrogen atoms or carbon atoms in the 1st, 3rd, 4th, and 5th positions is replaced with an organic group or a hydroxyl group. Also included are compounds containing substituted piperidine rings.

A typical compound (C) component containing such a 2,2,6,6-tetra-substituted piperidinyl group is represented by the following general formula (
It contains the structure represented by I).

Here, R1, Ra, Ra, in formula (1),
R4 is each independently a C□-18 alkyl group such as a methyl group, ethyl group, propyl group, dodecyl group, stearyl group; cycloalkyl group such as a cyclopentyl group or cyclohexyl group: 2-hydroxyethyl group, 2-methoxycarbonyl group Substituted alkyl groups such as ethyl group and 3-hydroxypropyl group; allyl groups such as phenyl group, naphthyl group and hydroxyphenyl group; aralkyl groups such as phenethyl group, benzyl group and hydroxyphenylalkyl group; R2 or R3 and R4 may each be taken together to form an aliphatic ring of 03 to CG.

-16= Among these organic groups, an alkyl group having an angle of 01 to 1°, especially a methyl group is preferred from the viewpoint of price and availability.

Next, R5 in formula (1) is a hydrogen atom or a methyl group,
Alkyl groups such as ethyl group, propyl group, butyl group, dodecyl group, stearyl group; 2-hydroxyethyl group, 2
- Substituted alkyl groups such as methoxycarbonylethyl group, 2-acetoxyethyl group, 2-(3-methoxycarbonylpropionyloxy)ethyl group, and 3-hydroxypropyl group; Allyl groups such as phenyl group, naphthyl group, and hydroxyphenyl group; Furthermore, it has an organic group represented by a phenethyl group, a benzyl group, a hydroxyphenylalkyl group, a cyclohexyl group, and the like.

In addition, 16 in formula (1) is a hydrogen atom, a hydroxyl group, a methyl group, an ethyl group, a propyl group, a butyl group, a dodecyl group,
Alkyl groups such as stearyl group; substituted alkyl groups such as 2-hydroxyethyl group, 2-methoxycarbonylethyl group, 2-acetoxyethyl group, 2-(3-methoxycarbonylpropionyloxy)ethyl group, and 3-hydroxypropyl group; Furyl groups such as phenyl, naphthyl, and hydroxyphenyl groups; aralkyl groups such as phenethyl, benzyl, and hydroxyphenylalkyl groups; acetoxy, propionyloxy, butyryloxy, lauroyloxy, substituted alkylcarbonyloxy, and benzoyl It represents an ester-bonded metal group such as an oxy group or a substituted benzoyloxy group; and an organic group represented by an amino group-containing group such as an alkoxycarbonylamino group or an N-monoalkylcarbamoylaminocarbamoylamino group.

Representative examples of the compound (C) component represented by the general formula (1) include 2,2,6.6-titramethylpiperidine, 1,2,2,6.6-pentamethylpiperidine,
2,2,6,6-tetramethyl-4-hydroxypiperidine, 1,2,2,6,6-bentamethyl-4-hydroxypiperidine, 1-ethyl-2,2,6,6-titramethylpiperidine, 1- Ethyl-2,2,6,6-tetramethyl-4-hydroxypiperidine, 1-butyl-2
．． 2,6.6-tetramethyl-4-hydroxypiperidine, 1-dodecyl-2.2,6,6-titramethylpiperidine, 1-phenyl-2.2,6.6-titramethylpiperidine, 1-(4 -Hydroxy-3,5-di
ert-butylphenyl)-2.2,6.6-titramethylpiperidine, 1-(2-hydroxyethyl)-2.

2,6.6-tetramethylbiperidine, 1-(2-hydroxyethyl)-4-hydroxy-2,2,6,6-titramethylpiperidine, 4-acetoxy-2,2,6.
6-titramethylpiperidine, 4-acetoxy-1.

2,2,6.6-pentamethylpiperidine, 1-(2-
Acetoxyethyl)-4-acetoxy-2,2,6,6
-Titramethylpiperidine, 1-(2-benzoyloxyethyl)-4-benzoyloxy-2,2.

6,6-titramethylpiperidine, 4-ethyl-2.

2,6,6-titramethylpiperidine, 4-ethyl-1
, 2,2,6,6-pentamethylpiperidine, 4-butyl-2,2,6,6-titramethylpiperidine, 4-octyl-2,2,6,6-titramethylpiperidine, 4
-Dodecyl-2,2,6,6-tetramethylbiperidine, 4-stearyl-2,2,6,6-titramethylpiperidine, 4-stearyl-1,2,2,6.6-pentamethylpiperidine Examples include.

Furthermore, compounds included as component (C) include 4-hydroxy-2.2,6.6-titramethylpiperidine, 4-hydroxy-1.2,2,6.6-pentamethylpiperidine, -hydroxy 2,2,6,6-tetramethylpiperidines having a hydroxyl group such as ethyl-4-hydroxy-2.2,6,6-titramethylpiperidine and 1-hydroxyethyl-2.2,6,6-titramethylpiperidine. with polybases such as succinic acid, adipic acid, sebacic acid, azelaic acid, decane-i,to-dicarboxylic acid, phthalic acid, isophthalic acid, terephthalic acid, trimellitic acid, malonic acid, substituted malonic acid. There are compounds containing two or more 2,2,6,6-tetramethylpiperidinyl groups in one molecule.

Representative compounds containing two or more 2,2,6,6-tetramethylpiperidinyl groups in one molecule are those represented by the following structural formulas (I[) to (■). be.

[However, n in the formula shall be an integer ranging from 1 to 20. ] These piperidinyl compound (C) components can be used alone or as a mixture of two or more.

In order to prepare the coating resin composition of the present invention from the components (A), (B), and (C) listed above, the fluoroolefin copolymer (in terms of solid content) contained in component (A) must be used. 50 to 1 part by weight of component (B) (in terms of solid content) is blended with 50 to 99 parts by weight of component (A) and the solid content contained in component (B). It is preferred that component (C) be added in an amount of 0.002 to 1 equivalent of the 2,2°6,6-tetra-substituted piperidinyl group per 1000 grams of the total solid content. 2, 2, 6
．． If the amount of 6-tetramethylpiperidinyl group is less than 0.002 equivalents, the adhesion to the substrate will be insufficient, and if it exceeds 1 equivalent, the acid resistance of the coating will decrease, and from the economic point of view. I also don't like it.

The resin composition for paint according to the present invention can be used as it is or, if necessary, by adding other resins such as acrylic resins, polyester resins or alkyd resins, solvents, pigments, leveling agents or curing catalysts. of the surface,
In particular, it can be used as a paint for aluminum-based metals and stainless steel.

When attempting to improve the curability of the coating resin composition of the present invention, it is preferable to add a curing catalyst.

Typical examples of such curing catalysts include dibutyltin diacetate, dibutyltin dioctate, dibutyltin dilaurate, triethylamine or dimethylaminoethanol when a (block) polyisocyanate compound is used as the curing agent (B) component. In addition, when aminoplast is used as the curing agent (B) component, p-toluenesulfonic acid, phosphoric acid or an alkyl ester of phosphoric acid, or "Beccamin P-198
dinonylnaphthalenedisulfonic acid, dodecylbenzenesulfonic acid, or their like, such as Naikure 155.2500X, Examples include organic amine blocked products.

The amount of these curing catalysts added is within the range of 0 to 10 parts by weight based on 100 parts of the total solid weight of the copolymer solution (A) component and curing agent (B) component, respectively. is appropriate, and the amount of the curing catalyst added is appropriately determined mainly by the curing temperature and curing time.

In the present invention, an acid anhydride group-containing compound such as maleic anhydride or itaconic anhydride is added to the hydroxyl group in the fluoroolefin copolymer solution (A) component containing the hydroxyl group to form the copolymer. It is also possible to make the polymer (A) component pendant with acid groups, thereby serving as a latent catalyst during the curing reaction with the curing agent (B) component.

As described above, the resin composition for paint of the present invention may contain pigments and solvents as desired. Examples of such pigments include inorganic pigments such as titanium oxide and carbon black, quinacridone pigments, and azo pigments. Examples include organic pigments and metal powders such as aluminum powder, copper powder, and zinc powder.

In addition, as the solvent, those used as the solvent in preparing the solution (A) component of the fluoroolefin copolymer and mixtures thereof can be used, but as the curing agent (B) component ( It goes without saying that when using block polyisocyanate compounds, it is necessary to avoid using solvents that react with isocyanate groups.

Therefore, the resin composition for coating according to the present invention is applied by a known and commonly used method such as spray coating, brush coating, roll coater, etc., and when a polyisocyanate compound is used as the curing agent (B) component. is from room temperature to 1
Baked at temperatures up to 20°C, and when using other hardening agents, baked at temperatures between 60 and 250°C for 5 seconds to
It can be baked for 40 minutes to form a cured coating.

〔Example〕

Next, the present invention will be explained in more detail with reference to Reference Examples, Examples, and Comparative Examples. In the following, all parts and percentages are based on weight unless otherwise specified.

Reference Examples 1 to 7 [Example of preparation of hydroxyl group-containing fluoroolefin copolymer solution (A) component] Methyl isobutyl ketone 3309 and tert-butyl peroxypivalate were placed in a stainless steel pressure tube with an internal volume of 10100 O. 4.2 and 1,000 yen as listed in Table 1 were charged, cooled to -70°C in a dry ice/methanol bath, and nitrogen gas was blown in to replace the air in the pressure tube.

Then, the liquefied hexafluoropropylene (RF
P) or chlorotrifluoroethylene (CTFE) was charged in the amounts listed in the same table and sealed. On the other hand, when tetrafluoroethylene (TFE) or vinylidene fluoride (VDF) was used, each raw material was charged in the same manner as above, and then TFE or VDF was press-fitted, sealed, and weighed.

After that, each of these pressure-resistant tubes was placed in a rotary thermostatic water tank heated to 60'C and reacted for 16 hours, then the contents were taken out and the necessary amount of xylene was added so that the nonvolatile content was 50%. A solution of each desired copolymer was obtained. The molecular weight of the obtained copolymer was as shown in Table 1, and the Gardner color was 1 or less.

(Left below) Examples 1 to 7 Copolymer solutions (A-1) prepared in Reference Examples 1 to 7
(A-7) was mixed with a curing agent, a compound containing a tetramethylpiperidinyl group, and, if necessary, a curing catalyst at the blending ratio shown in Table 2 to form a paint.

An untreated aluminum plate (A
1050P) (hereinafter abbreviated as S-1) or stainless steel plate (SUS-304) (hereinafter abbreviated as S-■) to a dry film thickness of approximately 4.
After coating to give zero tone, baking was performed under the conditions listed in Table 2, and the coating was left at room temperature for 7 days to obtain a cured coating film.

Thereafter, the adhesion of each coating film was evaluated by the method described in footnote 4 of Table 2. The results are summarized in Table 2.

Comparative Examples 1 to 4 Polymer solutions (A-1) to (A
Cured coating films were obtained in the same manner as in Examples 1 to 4, except that 2,2,6,6-titramethylpiperidine compound was used and the 2,2,6,6-titramethylpiperidine compound was not used, and then the adhesion was evaluated. Second result
Shown in the table.

As is clear from Table 2, the coating resin composition of the present invention provides cured coating films with good adhesion to aluminum and stainless steel.

(The following is a blank space) [Effects of the Invention] The resin composition for paint of the present invention has excellent adhesion to metal surfaces, particularly aluminum-based metals and stainless steel, and is therefore suitable for coating articles manufactured from such metals. However, it is also useful for the exterior of buildings, roof tiles, PCM, etc., and for automobiles (automobile enamel paints, metallic base paints, or clear paints).

Patent applicant Dainippon Ink & Chemicals Co., Ltd. Agent
Patent attorney Yoshio Mizuno - Choichi

Claims (1)

[Claims] 1. (A): Solution of fluoroolefin copolymer containing hydroxyl group (B): Curing agent reactive with hydroxyl group (C): 2,2,6,6-tetra substitution 1. A resin composition for paint, comprising a compound containing a piperidinyl group. 2. The fluoroolefin copolymer is obtained by copolymerizing (1) a fluoroolefin and (2) a hydroxyalkyl vinyl ether as essential monomer components, according to claim 1. The resin composition for paint described above. 3. The fluoroolefin copolymer is obtained by copolymerizing (1) a fluoroolefin, (2) a hydroxyalkyl vinyl ether, and (3) an alkyl vinyl ether and/or a cycloalkyl vinyl ether as essential monomer components. Claim 1 which is
The resin composition for coatings described in 2. 4. The fluoroolefin copolymer is obtained by copolymerizing (1) fluoroolefin, (2) hydroxyalkyl vinyl ether, and (3) vinyl carboxylate as essential monomer components. The resin composition for paint according to claim 1, characterized by: 5. The fluoroolefin copolymer uses (1) fluoroolefin, (2) hydroxyalkyl vinyl ether, (3) vinyl carboxylate, and (4) alkyl vinyl ether and/or cycloalkyl vinyl ether as essential monomer components. The resin composition for paint according to claim 1, which is obtained by copolymerizing. 6. The vinyl carboxylate is selected from the group consisting of vinyl esters of aliphatic monocarboxylic acids having branched alkyl groups C_4 to C_1_7, vinyl cyclohexanecarboxylate, vinyl benzoate, and vinyl p-tert-butylbenzoate. At least one resin composition for coating material according to claim 4 or 5. 7. Claim 2, characterized in that the fluoroolefin is at least one selected from the group consisting of hexafluoropropylene, chlorotrifluoroethylene, tetrafluoroethylene, and vinylidene fluoride.
6. The resin composition for paint according to any one of items 6 to 6. 8. The resin composition for paint according to claim 1, wherein the curing agent is a polyisocyanate compound. 9. The resin composition for paint according to claim 1 or 8, wherein the curing agent is a polyisocyanate compound having an isocyanurate ring. 10. The resin composition for paint according to claim 1, wherein the curing agent is a block polyisocyanate compound. 11. The resin composition for paint according to claim 1 or 10, wherein the curing agent is a block polyisocyanate compound having an isocyanurate ring. 12. The resin composition for paint according to claim 1, wherein the curing agent is an aminoplast. 13. Claim 1 or 1, characterized in that the curing agent is methyl etherified methylolmelamine.
The resin composition for paint according to item 2.