JP7423390B2 - stripping agent composition - Google Patents

Description

TECHNICAL FIELD The present invention relates to a release agent composition with excellent long-lasting release effects.

As a method of repainting the paint film (old paint film) formed on the surface of buildings, civil engineering structures, etc., there is a method of painting a new paint on top of the old paint film, or a method of removing the old paint film and applying a new paint. Examples include a method of painting. Traditionally, in order to reduce cost and construction time, new paint is often applied over the old paint film, and currently buildings and civil engineering structures are coated two or three times or more over the old paint film. There are many.

However, if multiple layers of new paint are applied over an old paint film that has already deteriorated, the paint film itself becomes heavy and there is a risk of putting a load on the base material. Moreover, the thickness of the coating film itself may become too thick, compressing the space. Furthermore, in recent years, highly functional paint films have appeared, and it may be difficult to apply new paint on top of the paint film itself.

Due to these problems, recently there has been an increase in the number of methods in which the old paint film is temporarily peeled off.
Methods for removing old paint include physical methods such as sanding, blasting, high-pressure water jetting, and chisel chisel, and chemical methods using chemicals and solvents. Chemical methods using solvents have come to be used due to issues such as this and environmental considerations. (For example, Patent Document 1, etc.)

Special Publication No. 2001-527115

Such a stripping agent contains an evaporation inhibitor in order to improve the sustainability of the stripping effect. For example, Patent Document 1 lists evaporation inhibitors (paragraph 0013).
However, simply containing such an evaporation inhibitor may not provide sufficient sustainability of the peeling effect, and there is a demand for even better sustainability of the peeling effect.

The present invention was made in view of these problems, and includes (C) a solvent, and (A) one functional group selected from a hydroxyl group, a carboxyl group, an amino group, an amide group, and an ester group in the molecule, and a carbon A compound having an aliphatic hydrocarbon chain of 6 or more and 30 or less, (B) 3 or more functional groups selected from hydroxyl group, carboxyl group, amino group, amide group, and ester group in the molecule, and 6 carbon atoms. It has been discovered that a stripping agent composition with excellent sustainability of stripping effect can be obtained by using two types of volatilization inhibitors of compounds having an aliphatic hydrocarbon chain of less than or equal to 1,000,000,000,000.

That is, the present invention has the following features.
1. (A) one or more compounds selected from octadecanol, tetradecanoic acid, erucic acid amide, methyl decanoate, and methyl oleate ;
(B) one or more compounds selected from sorbitol or glycerin ,
(C) a solvent containing benzyl alcohol ;
A stripping agent composition comprising:
2. 1. characterized in that the component (A) is 1 part by weight or more and 20 parts by weight or less, and the component (B) is 0.5 part by weight or more and 20 parts by weight or less, based on 100 parts by weight of component (C). The stripping agent composition described in

The stripping agent composition of the present invention has an excellent long-lasting stripping effect.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated.

The stripping agent composition of the present invention has (A) one functional group selected from a hydroxyl group, a carboxyl group, an amino group, an amide group, and an ester group in the molecule, and an aliphatic hydrocarbon chain having 6 to 30 carbon atoms. (hereinafter also referred to as "component (A)"), (B) three or more functional groups selected from hydroxyl group, carboxyl group, amino group, amide group, and ester group in the molecule, and a carbon number A compound characterized by containing a compound having an aliphatic hydrocarbon chain of less than 6 (hereinafter also referred to as "component (B)") and a solvent (C) (hereinafter also referred to as "component (C)"). It is.

Component (A) used in the present invention has one functional group selected from a hydroxyl group, a carboxyl group, an amino group, an amide group, and an ester group in the molecule, and a carbon number of 6 to 30 (preferably 8 to 24, More preferably, it is a compound having an aliphatic hydrocarbon chain of 10 or more and 22 or less, and even more preferably 12 or more and 20 or less.
Such component (A) has the function of suppressing the volatilization of component (C), is easily compatible with component (C) due to its aliphatic hydrocarbon chain, and has functional groups (hydroxyl group, carboxyl group, amino A function that further suppresses the volatilization of component (C) through the interaction between the functional groups (hydroxyl group, carboxyl group, amino group, amide group, ester group) of component (B) and the functional group (hydroxyl group, carboxyl group, amino group, amide group, ester group) can be increased.

Examples of component (A) include aliphatic monoalcohols, aliphatic monocarboxylic acids, aliphatic monoamines, aliphatic monoamides, and aliphatic monoesters.
Examples of aliphatic monoalcohols include hexanol, heptanol, octanol, nonanol, decanol, undecanol, dodecanol, tridecanol, tetradecanol, pentadecanol, hexadecanol, heptadecanol, octadecanol, nonadecanol, eicosanol, and henicosanol. , docosanol, tricosanol, tetracosanol, pentacosanol, hexacosanol, heptacosanol, octacosanol, nonacosanol, triacontanol, oleyl alcohol, linoleyl alcohol, palmitrail alcohol, elaidyl alcohol, elaidlinoleyl alcohol, linole Nyl alcohol, elidorinolenyl alcohol, erucyl alcohol, isohexanol, 2-methyl-1-pentanol, 3-methyl-1-pentanol, 2-ethyl-1-butanol, 3,3-dimethyl-1- Butanol, isoheptanol, 4-methyl-1-hexanol, 3-methyl-1-hexanol, 2-ethyl-2-methyl-1-butanol, isooctanol, 2-ethylhexanol, 6-methyl-2-heptanol, Isononanol, 3,5,5-trimethylhexanol, isodecanol, isoundecanol, isododecanol, 2-butyloctanol, isotridecanol, isotetradecanol, isopentadecanol, 2-hexyldecanol, isohexadecanol , 2-hexyldecanol, isoheptadecanol, isooctadecanol, 2-isoheptylisoundecanol, isononadecanol, isoeicosanol, 2-octyldodecanol, isoheptadecanol, 18-methyleicosanol Sanol, isodocosanol, isotricosanol, isotetracosanol, 2-decyltetradecanol, isopentacosanol, isohexacosanol, isoheptacosanol, isooctacosanol, isononacosanol, isotriacontanol etc.
Examples of aliphatic monocarboxylic acids include hexanoic acid, heptanoic acid, octanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, heptadecanoic acid, octadecanoic acid, nonadecanoic acid, and icosane. Acid, henicosanoic acid, docosanoic acid, tricosanoic acid, tetracosanoic acid, pentacosanoic acid, hexacosanoic acid, heptacosanoic acid, octacosanoic acid, nonacosanoic acid, tricontanoic acid, sapienoic acid, oleic acid, eicosenoic acid, erucic acid, nervonic acid, palmitoleic acid , vaccenic acid, paulic acid, mead acid, linoleic acid, γ-linolenic acid, pinolenic acid, eicosadienoic acid, dihomo-γ-linolenic acid, arachidonic acid, docosadienoic acid, docosatetraenoic acid, adrenic acid, docosapentaenoic acid, Ozbond acid, α-linolenic acid, stearidonic acid, eicosatrienoic acid, eicosatetraenoic acid, eicosapentaenoic acid, docosapentaenoic acid, docosahexaenoic acid, tetracosapentaenoic acid, tetracosahexaenoic acid, ricinoleic acid, milli Streic acid, pentadecenoic acid, heptadecenoic acid, petroselic acid, eleostearic acid, boseopentaenoic acid, gadoleic acid, ethylhexanoic acid, neodecanoic acid, isotridecanoic acid, isotetradecanoic acid, isopentadecanoic acid, isohexadecanoic acid, 2-hexyldecanoic acid, Examples include isoheptadecanoic acid, isooctadecanoic acid, isononadecanoic acid, isoeicosanoic acid, 2-octyldodecanoic acid, and 2-decyltetradecanoic acid.
Examples of aliphatic monoamines include hexylamine, heptylamine, octylamine, ethylhexylamine, decylamine, dodecylamine, tetradecylamine, hexadecylamine, octadecylamine, icosylamine, docosylamine, tetracosylamine, pentacosylamine, and hexadecylamine. Examples include ruamine, heptacosylamine, octacosylamine, nonacosylamine, triacontylamine, oleylamine, linoleylamine, erucamine, ricinoleylamine, and the like.
Examples of aliphatic monoamides include hexanamide, heptanamide, octanamide, decanamide, dodecanamide, tetradecanamide, hexadecanamide, octadecanamide, icosanamide, docosanamide, tetracosanamide, oleic acid amide, linoleic acid amide, and linolenic acid amide. , arachidonic acid amide, erucic acid amide, etc., and an aliphatic monoamide which is a reaction product of the above aliphatic monocarboxylic acid and an amine can be used. As the amine used here, for example, one or more selected from the above-mentioned aliphatic monoamines, methylamine, ethylamine, propylamine, butylamine, and pentylamine can be used.
Examples of the aliphatic monoester include aliphatic monoesters that are reaction products of the above-mentioned aliphatic monocarboxylic acids and alcohols. As the alcohol used here, one or more selected from the aliphatic monoalcohols mentioned above, methanol, ethanol, propyl alcohol, butyl alcohol, and pentyl alcohol can be used.

Component (B) used in the present invention has three or more functional groups selected from hydroxyl group, carboxyl group, amino group, amide group, and ester group and an aliphatic hydrocarbon chain having less than 6 carbon atoms in the molecule. As long as the compound contains three or more functional groups selected from hydroxyl, carboxyl, amino, amide, and ester groups in its molecule, the number of functional groups may be one or two or more. .
Such component (B) has a function of suppressing the volatilization of component (C), and as described above, by interacting with component (A), it can enhance the function of suppressing volatilization of component (C). Can be done. In addition, the functional group of component (B) adsorbs moisture in the atmosphere or moisture contained in the stripping agent, further suppresses volatilization of component (C), and suppresses drying of the surface. It is possible to simplify the peeling work by improving peelability, improving scattering prevention, etc.

Component (B) includes, for example, glycerin, butanetriol, 2-methyl-propanetriol, pentanetriol, 2-methyl-butanetriol, trimethylolethane, hexanetriol, 2-ethyl-butanetriol, trimethylolpropane, Ethanolamine, triisopropanolamine, pentaerythritol, pentantetrol, hexanetetrol, diglycerin, ditrimethylolpropane, sorbitol, adonitol, arabitol, xylitol, triglycerin, dipentaerythritol, sorbitol, mannitol, iditol, inositol, dulcitol, Compounds having three or more hydroxyl groups such as talose, allose, tripentaerythritol,
Compounds having three or more carboxyl groups such as benzenetricarboxylic acids such as trimellitic acid and hemimellitic acid, benzenetetracarboxylic acids such as pyromellitic acid, benzenehexacarboxylic acids such as mellitic acid, and cyclohexanetricarboxylic acids;
Compounds having three or more amino groups such as triaminotriethylamine and triethylenetetramine,
Compounds having three or more amide groups such as hexamethylphosphate triamide,
A compound in which the total amount of carboxyl groups and amide groups is 3 or more, which is a reaction product of the above-mentioned compound having 3 or more carboxyl groups and an amine,
A compound in which the total amount of amino groups and amide groups is 3 or more, which is a reaction product of the above-mentioned compound having 3 or more amino groups and carboxylic acid,
A compound in which the total amount of hydroxyl groups and ester groups is 3 or more, which is a reaction product of the above-mentioned compound having 3 or more hydroxyl groups and carboxylic acid,
A compound in which the total amount of carboxyl groups and ester groups is 3 or more, which is a reaction product of the above-mentioned compound having 3 or more carboxyl groups and alcohol,
etc., and one or more types of these can be used.
The amines used here include the above-mentioned aliphatic monoamines, or one or more selected from methylamine, ethylamine, propylamine, butylamine, and pentylamine, and the carboxylic acids include the above-mentioned aliphatic monocarboxylic acids, or , one or more selected from methanoic acid, ethanoic acid, propanoic acid, butanoic acid, and pentanoic acid, and the alcohol is one selected from the above aliphatic monoalcohols, or methanol, ethanol, propyl alcohol, butyl alcohol, and pentyl alcohol. There are more than one species.

Component (C) used in the present invention is a solvent that has a peeling effect, and is different from the above-mentioned (A) component and the above-mentioned (B) component. One type or two or more types can be used.
・Linear chain or branched saturated or unsaturated aliphatic hydrocarbons Examples include hexane, octane, nonane, decane, undecane, dodecane, tridecane, pentadecane, tetradecane, hexadecane, heptadecane, octadecane, nonadecane, eicosane, docosane, etc. In particular, linear saturated aliphatic hydrocarbons are preferred.
・Linear chain, branched saturated, unsaturated aliphatic dialcohols such as hexanediol, heptanediol, octanediol, nonanediol, decanediol, undecanediol, dodecanediol, tridecanediol, tetradecanediol, pentadecanediol, hexadecane diol, heptadecanediol, octadecanediol, nonadecanediol, eicosanediol, henicosanediol, docosanediol, tricosanediol, tetracosanediol, ricinoleyl alcohol, etc., especially linear saturated Aliphatic dialcohols and the like are preferred.
・Linear chain, branched saturated, unsaturated aliphatic dicarboxylic acids Examples include hexanedioic acid, heptanedioic acid, octanedioic acid, nonanedioic acid, decanedioic acid, etc. Especially linear saturated aliphatic dicarboxylic acids Dicarboxylic acids and the like are preferred.
- Linear or branched saturated or unsaturated aliphatic diesters having 6 to 24 carbon atoms For example, the above aliphatic dicarboxylic acids, oxalic acid, malonic acid, succinic acid, glutaric acid, and the above aliphatic monoalcohols or methanol , ethanol, propanol, butanol, aliphatic diester which is a reaction product of one or more types selected from pentanol, and the above-mentioned aliphatic dialcohol or ethanediol, propanediol, butanediol, pentanediol, and the above-mentioned aliphatic monocarboxylic Examples thereof include acids, or aliphatic diesters which are reaction products of one or more types selected from methanoic acid, ethanoic acid, propanoic acid, butanoic acid, and pentanoic acid.
- Straight-chain or branched saturated or unsaturated aliphatic ether Examples include heptyl ether, octyl ether, tetradecyl ether, hexadecyl ether, etc., with straight-chain saturated aliphatic ethers being particularly preferred.
・Linear chain, branched saturated, unsaturated aliphatic ketones Examples include methyl isobutyl ketone, diisobutyl ketone, heptanone, cyclohexanone, cycloheptanone, cyclooctanone, isophorone, etc. In particular, straight chain saturated fats The group ketones and the like are preferred.
-Linear chain, branched saturated or unsaturated aliphatic diamine Examples include hexyldiamine, heptyldiamine, octanediamine, decanediamine, dodecanediamine, etc., and particularly preferred are linear saturated aliphatic diamines.
・Linear chain or branched saturated or unsaturated aliphatic diamide For example, one or more of the above aliphatic dicarboxylic acids, the above aliphatic monoamines, or methylamine, ethylamine, propylamine, butylamine, and pentylamine. Examples include aliphatic diamides which are reaction products, and linear saturated aliphatic diamides are particularly preferred.
- Straight chain or branched saturated or unsaturated aromatic hydrocarbons Examples include toluene, xylene, benzene, ethylbenzene, cumene, trimethylbenzene, naphthalene and the like.
- Straight-chain or branched saturated or unsaturated aromatic alcohol Examples include phenol and benzyl alcohol, with benzyl alcohol being particularly preferred.
- Straight-chain, branched, saturated, unsaturated aromatic ether Examples include benzyl phenyl ether, benzyl methyl ether, dibenzyl ether, diphenyl ether, and the like.
・Glycols For example, ethylene glycol, diethylene glycol, propylene glycol, ethylene glycol mono-n-butyl ether, ethylene glycol mono-tert-butyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, ethylene glycol diacetate, propylene glycol monobutyl ether, Dipropylene glycol monomethyl ether, propylene glycol mono-n-butyl ether, dipropylene glycol monopropyl ether, ethylene glycol dibutyl ether, diethylene glycol ethyl methyl ether, diethylene glycol dimethyl ether, diethylene glycol ethyl methyl ether, diethylene glycol diethyl ether, diethylene glycol dibutyl ether, dipropylene glycol dimethyl ether , triethylene glycol dimethyl ether, diethylene glycol monoethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, and the like.
In addition, mineral spirit, white spirit, mineral turpentine, isoparaffin, solvent kerosene, aromatic naphtha, VM&P naphtha, solvent naphtha, etc., which are mixtures of the above aliphatic hydrocarbons and the above aromatic hydrocarbons, and N,N-dimethylformamide, N,N-diethylformamide, N,N-dimethylacetamide, 1-3-dimethyl-2-imidazolidinone, ethyl acetate, butyl acetate, dimethyl sulfoxide, hexamethylphosphoric acid triamide, N-methylpyrrolidone, sulfolane, chlorobutane, Bromhexane, dichloromethane, 1,2−dichloroethane, 1,1−dichloroethane, chloroform, chlorobenzene, dichlorobenzene, chlorinated polyethylene, chlorinated polypropylene, triglyceride, etc. can also be used.

The mixing amount of component (A), component (B), and component (C) of the present invention is 1 part by weight or more and 20 parts by weight or less (preferably 3 parts by weight or more) of component (A) per 100 parts by weight of component (C). 15 parts by weight or less) and component (B) from 0.5 parts by weight to 20 parts by weight (preferably from 1 part by weight to 15 parts by weight).

In addition to the above components (A), (B), and (C), the release agent composition of the present invention includes, for example, a thickener, an oxidizing agent, a reducing agent, water, a surfactant, a resin, a wax, Additives such as fragrances, colorants, dyes, etc. may also be used.

Examples of thickeners include sepiolite, palygorskite, bentonite, montmorillonite, hectorite, beidellite, saponite, nontronite, volkonscoreite, sauconite, stevensite, fluorohectolite, laponite, rectonite, vermiculite, illite, and macatite. , clay minerals such as kanemite, illierite, magadiite, and kenyaite, swellable silica, cellulose or cellulose derivatives, polyacrylic acid polymers, and the like can be used.
The content of the thickener is preferably 0.1% by weight or more and 20% by weight or less, more preferably 0.5% by weight or more and 15% by weight or less, based on the total amount of the composition.

Examples of oxidizing agents include formic acid, acetic acid, butyric acid, acrylic acid, oxalic acid, malonic acid, succinic acid, glutaric acid, phthalic acid, maleic acid, fumaric acid, benzoic acid, salicylic acid, cinnamic acid, lactic acid, and malic acid. , citric acid, tartaric acid, ascorbic acid, aspartic acid, aminobenzoic acid, alginic acid, glycolic acid, gluconic acid, glutamic acid, toluenesulfonic acid, nicotinic acid, uric acid, halogen-substituted acetic acid, benzenesulfonic acid, hydrogen peroxide, perchloric acid Examples include salts, perborates, and the like.

Examples of the reducing agent include sodium hydroxide, sodium polyphosphate, sodium carbonate, potassium hydroxide, lithium hydroxide, and calcium hydroxide.

The amount of the oxidizing agent and reducing agent mixed is not particularly limited, but the total amount is 0.1% by weight or more and 10% by weight or less, more preferably 0.5% by weight or more and 5% by weight or less, based on the total amount of the composition. It is preferable.

Water can be appropriately set and used depending on the types of components (A) to (C). The amount of water mixed is not particularly limited, but it is preferably 0.1% by weight or more and 50% by weight or less, more preferably 0.5% by weight or more and 45% by weight or less, based on the total amount of the composition.

As the surfactant, nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants, etc. can be used without particular limitation.
The amount of the surfactant mixed is not particularly limited, but it is preferably 0.1% by weight or more and 10% by weight or less, more preferably 0.5% by weight or more and 5% by weight or less, based on the total amount of the composition.

Examples of the resin include vinyl acetate resin, acrylic resin, urethane resin, polyester resin, etc. In the present invention, it is particularly preferable to use thermoplastic resins such as vinyl acetate resin and acrylic resin. Further, the resin form is not particularly limited, such as water-soluble type, water-dispersible type, solvent-soluble type, NAD type, self-emulsifying type, powder type, etc., but may be water-dispersible type, self-emulsifying type, powder type, etc. preferable.

Examples of the wax include polyethylene wax and its derivatives, montan wax and its derivatives, paraffin wax and its derivatives, microcrystalline wax and its derivatives, petrolatum, carnauba wax, candelilla wax, rice wax, wood wax, lanolin, beeswax, Examples include Fischer-Tropsch wax, and the wax is not particularly limited to liquid or solid form, and one or more types can be used. In the present invention, it is particularly preferable to use polyethylene wax and paraffin wax.

The stripping agent composition of the present invention is used to strip coating films formed on the surfaces of buildings, civil engineering structures, etc. Applicable coatings are not particularly limited, but include, for example, JIS K5621 "General Purpose Rust". JIS K5651 "Amino alkyd resin paint", JIS K5658 "Weather resistant top coat for construction", JIS K5659 "Weather resistant paint for steel structures", JIS K5660 "Glossy synthetic resin emulsion paint", JIS K5663 " Examples include "synthetic resin emulsion paint", JIS K5668 "synthetic resin emulsion pattern paint", JIS K5670 "acrylic resin non-aqueous dispersion paint", and JIS A6909 "architectural finishing coating material".

The release agent composition of the present invention is applied onto such a coating film at a weight of preferably 0.2 kg/m ² or more and 5.0 kg/m ² or less, more preferably 0.3 kg/m ² or more and 3.0 kg/m 2 or less. It is sufficient to apply with ² or less. The coating device is not particularly limited, and for example, a roller, brush, trowel, spatula, spray, gun, or the like may be used for coating.

Further, the stripping agent composition of the present invention can soften and start stripping in about 30 minutes to 2 hours, and continues to soften even after 24 to 48 hours have passed. Therefore, it is possible to remove the material at a time that suits the builder, such as the next day. The peeling device is not particularly limited, and for example, a trowel, spatula, scraper, or the like may be used for peeling.

Examples are shown below to clarify the features of the present invention.

Release agent compositions 1 to 19 were prepared by uniformly mixing the following raw materials in the weight proportions shown in Table 1.
A1: Octadecanol A2: Tetradecanoic acid A3: Erucic acid amide A4: Methyl decanoate A5: Methyl oleate A6: Methyl propionate B1: Sorbitol B2: Glycerin C1: N-methylpyrrolidone C2: Dimethyl phthalate C3: Benzyl alcohol C4: Nonane C5: Xylene Thickener 1: Cellulose thickener Thickener 2: Bentonite thickener Oxidizing agent: Hydrogen peroxide resin: Vinyl acetate resin (solid content 100% by weight)
Surfactant: polyoxyethylene (20) sodium lauryl ether sulfate

(test)
It was installed so that the coating surface shown below was perpendicular, and the peeling composition shown in Table 1 was applied with a roller in the required amount shown below, and the following test was conducted.
Coating surface: Spray acrylic silicone resin paint containing acrylic silicone resin and titanium oxide as main components on one side of a slate board (300 x 150 x 6 mm) to form a coating film with a thickness of 0.3 mm. The coated surface was exposed for 400 hours using an accelerated weathering tester "I-Super UV Tester" (manufactured by Iwasaki Electric Co., Ltd.). Required amount of stripping composition: 0.5 kg/m ² .

(Test 1) Adhesion The degree of adhesion of the release composition immediately after application was visually observed. The degree was evaluated on a five-point scale from "5" (excellent adhesion was exhibited even on vertical surfaces without any problems) to "1" (part of the stripping composition dripped down). The results are shown in Table 1.

(Test 2) Peelability 24 hours after application, the paint film was peeled off using a spatula, and the degree of peeling was evaluated from ``5'' (smooth peeling with no problems and excellent paint film softening properties). Evaluation was made on a five-point scale of "1" (difficult to peel and poor coating softening properties). The results are shown in Table 1.

(Test 3) Persistence of Peeling Effect 48 hours after application, the coating was peeled off using a spatula, and the degree of peeling was evaluated. The evaluation is the same as Test 2. The results are shown in Table 1.

Claims (2)

(A) one or more compounds selected from octadecanol, tetradecanoic acid, erucic acid amide, methyl decanoate, and methyl oleate ;
(B) one or more compounds selected from sorbitol and glycerin ;
(C) a solvent containing benzyl alcohol ;
A stripping agent composition comprising: 2. The method according to claim 1, wherein the component (A) is 1 part by weight or more and 20 parts by weight or less, and the component (B) is 0.5 part by weight or more and 20 parts by weight or less, based on 100 parts by weight of the component (C). Stripper composition.