JP7456835B2 - Aqueous stripper composition - Google Patents

Description

TECHNICAL FIELD The present invention relates to an aqueous stripping agent composition that has a small environmental impact and has excellent peeling effects and long-lasting peeling 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. Conventionally, in order to reduce cost and construction time, new paint is often applied on top of the old paint film, and currently buildings and civil engineering structures that have been painted over the old paint film two or three times or more are 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 water-based stripping agents have come to be used from the viewpoint of environmental considerations and other problems. (For example, Patent Document 1, etc.)

JP 2017-155199 Publication

Such a water-based stripping agent has a basic composition of water and benzyl alcohol, and further contains a solvent and an emulsifier to efficiently dissolve and disperse water and benzyl alcohol, thereby obtaining excellent stripping performance. Can be done.
For example, Patent Document 1 describes a method of solubilizing water and benzyl alcohol by further adding a polar aprotic solvent.
However, in the method of Patent Document 1, the peeling effect and the sustainability of the peeling effect may be poor, and there is room for improvement.

The present invention was made in view of these problems, and includes (A) water, (B) an aromatic alcohol, and (C) a surfactant having an alkyl group having 6 to 30 carbon atoms and an oxyalkylene unit. and (D) an aromatic solvent and/or (E) an aliphatic solvent having 6 to 30 carbon atoms, it has been found that the peeling effect and the sustainability of the peeling effect are excellent, and the present invention has been completed. reached.

That is, the present invention has the following features.
1. (A) Water 25% by weight or more and 70% by weight or less ,
(B) aromatic alcohol 20% by weight or more and 70% by weight or less ,
An aqueous stripper composition comprising:
(C) a surfactant having an alkyl group having 6 to 30 carbon atoms and an oxyalkylene unit from 0.1% by weight to 10% by weight ;
(D) aromatic solvent 0.1% to 10% by weight; (E) aliphatic solvent having 6 to 30 carbon atoms 0.5% to 10% by weight ;
Contains
(E) the aliphatic solvent having 6 to 30 carbon atoms contains one or more selected from nonane, octadecanol, erucic acid amide, hexadecanol, octanol, methyl decanoate, and methyl oleate;
An aqueous stripping agent composition characterized by:

The aqueous stripping agent composition of the present invention has a small environmental impact, and has excellent stripping effect and durability of the stripping effect.

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

The aqueous stripping agent composition of the present invention contains (A) water (hereinafter also referred to as "component (A)"), (B) aromatic alcohol (hereinafter also referred to as "component (B)"), ( C) a surfactant having an alkyl group having 6 to 30 carbon atoms and an oxyalkylene unit (hereinafter also referred to as "component (C)"), and (D) an aromatic solvent (hereinafter "component (D)") ) and/or (E) an aliphatic solvent having 6 to 30 carbon atoms (hereinafter also referred to as "component (E)").

Examples of the component (B) used in the present invention include benzyl alcohol, phenylethyl alcohol, and naphthol. In the present invention, it is particularly preferable to use benzyl alcohol.
By mixing such components (B) and (A), an excellent aqueous release agent can be obtained.

The component (C) used in the present invention is a surfactant having an alkyl group having 6 to 30 carbon atoms (preferably having 8 to 24 carbon atoms) and an oxyalkylene unit, and examples thereof include polyoxyalkylene alkyl ethers, or their sulfates, sulfate ester salts, sulfonates, sulfonate ester salts, succinates, and succinate ester salts, and one or more of these may be used.
Specific examples of polyoxyalkylene alkyl ethers include polyoxyethylene nonylphenyl ether, polyoxyethylene octylphenyl ether, polyoxyethylene distearate, polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyoxyethylene alkyl ether, polyoxyethylene phenyl ether, polyoxyethylene tridecyl ether, polyoxyethylene decyl ether, polyoxyethylene octyldodecyl ether, etc. Examples of oxyalkylene units include oxyethylene units and oxypropylene units, and the number of repeating units is preferably 6 to 50, and more preferably 8 to 30.
Such component (C) can form an emulsion dispersion of components (A) and (B) and can enhance the dispersion stability of component (B). By mixing component (C) with components (D) and (E) described below, a release agent having excellent release effect and durability of the release effect can be obtained.

Component (D) used in the present invention includes, for example, toluene, xylene, benzene, ethylbenzene, cumene, trimethylbenzene, naphthalene, chlorobenzene, dichlorobenzene, benzyl phenyl ether, benzyl methyl ether, dibenzyl ether, diphenyl ether, etc. One or more of these can be used.
Such component (D) is a component that can be expected to particularly improve the peeling effect. In addition, component (D) is particularly easily compatible with component (B), and the synergistic effect of component (B) and component (D) can provide a better peeling effect.

Component (E) used in the present invention is an aliphatic solvent having 6 to 30 carbon atoms (preferably 8 to 24 carbon atoms, more preferably 10 to 22 carbon atoms, even more preferably 12 to 20 carbon atoms). In particular, it is a component that can be expected to improve the sustainability of the peeling effect. In addition, component (E) is particularly easily compatible with component (C), and also has the effect of increasing the dispersion stability of component (B) (or component (D)).
Examples of the component (E) include those listed below, and one or more of these can be used.
- Straight chain, branched, saturated or unsaturated aliphatic hydrocarbons having 6 to 30 carbon atoms, such as hexane, octane, nonane, decane, undecane, dodecane, tridecane, pentadecane, tetradecane, hexadecane, heptadecane, octadecane, nonadecane , eicosane, docosane, tricosane, tetracosane, pentacosane, hexacosane, heptacosane, octacosane, nonacosane, triacontane, etc., and linear saturated aliphatic hydrocarbons are particularly preferred.
- Linear, branched, saturated, unsaturated aliphatic monoalcohols having 6 to 30 carbon atoms, including but not limited to primary, secondary, and tertiary alcohols, such as hexanol, heptanol, octanol, nonanol, Decanol, undecanol, dodecanol, tridecanol, tetradecanol, pentadecanol, hexadecanol, heptadecanol, octadecanol, nonadecanol, eicosanol, heniicosanol, docosanol, tricosanol, tetracosanol, pentacosanol, hexacosanol, Heptacosanol, octacosanol, nonacosanol, triacontanol, oleyl alcohol, linoleyl alcohol, palmitrail alcohol, elaidyl alcohol, elaidlinoleyl alcohol, linolenyl alcohol, elaidrinolenyl 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- Isoheptyl isoundecanol, isononadecanol, isoeicosanol, 2-octyldodecanol, isoheneeicosanol, 18-methyleicosanol, isodocosanol, isotricosanol, isotetracosanol, Examples include 2-decyltetradecanol, isopentacosanol, isohexacosanol, isoheptacosanol, isooctacosanol, isononacosanol, isotriacontanol, etc. In particular, linear primary saturated aliphatic Aliphatic monoalcohols and the like are preferred.
- Linear, branched, saturated or unsaturated aliphatic dialcohols having 6 to 30 carbon atoms, such as hexanediol, heptanediol, octanediol, nonanediol, decanediol, undecanediol, dodecanediol, tridecanediol, Tetradecanediol, pentadecanediol, hexadecanediol, heptadecanediol, octadecanediol, nonadecanediol, eicosanediol, henicosanediol, docosanediol, tricosanediol, tetracosanediol, pentacosanediol, hexacosanediol, heptadecanediol Examples include cosanediol, octacosanediol, nonacosanediol, triacosanediol, ricinoleyl alcohol, and particularly preferred are linear saturated aliphatic dialcohols.
- Linear, branched, saturated or unsaturated aliphatic monocarboxylic acids having 6 to 30 carbon atoms, such as 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, icosanoic acid, henicosanoic acid, docosanoic acid, tricosanoic acid, tetracosanoic acid, pentacosanoic acid, hexacosanoic acid, heptacanoic acid, octacosanoic acid, nonacosanoic acid, triacontanoic acid, sapien 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, myristoleic acid, pentadecenoic acid, heptadenoic acid, petroselic acid, eleostearic acid, boseopentaenoic acid, gadoleic acid, ethylhexanoic acid, neodecanoic acid, isotridecanoic acid, iso Tetradecanoic acid, isopentadecanoic acid, isohexadecanoic acid, 2-hexyldecanoic acid, isoheptadecanoic acid, isooctadecanoic acid, isononadecanoic acid, isoeicosanoic acid, 2-octyldodecanoic acid, 2-decyltetradecanoic acid, etc., and especially linear Preferred are saturated or unsaturated aliphatic monocarboxylic acids.
- Linear or branched saturated or unsaturated aliphatic dicarboxylic acids having 6 to 30 carbon atoms Examples include hexanedioic acid, heptanedioic acid, octanedioic acid, nonanedioic acid, decanedioic acid, etc., especially Straight chain saturated aliphatic dicarboxylic acids and the like are preferred.
- Straight-chain, branched, saturated or unsaturated aliphatic monoesters having 6 to 30 carbon atoms For example, aliphatic monoesters that are reaction products of the above aliphatic monocarboxylic acids having 6 to 30 carbon atoms and alcohols. Alternatively, an aliphatic monoester, which is a reaction product of the above aliphatic monoalcohol having 6 to 30 carbon atoms and a carboxylic acid, may be mentioned.
- Linear, branched, saturated or unsaturated aliphatic diesters having 6 or more carbon atoms and 30 or less carbon atoms For example, aliphatic diesters that are the reaction products of the above aliphatic dicarboxylic acids having 6 or more carbon atoms and 30 or less carbon atoms, or Examples include aliphatic diesters which are reaction products of the above-mentioned aliphatic dialcohol having 6 to 30 carbon atoms and carboxylic acid.
The alcohol used in the production of the aliphatic monoester and aliphatic diester includes the aliphatic monoalcohols mentioned above, and one or more selected from methanol, ethanol, propanol, butanol, and pentanol. Further, examples of the carboxylic acid include the above-mentioned aliphatic monocarboxylic acids, or one or more selected from methanoic acid, ethanoic acid, propanoic acid, butanoic acid, and pentanoic acid.
- Linear, branched, saturated or unsaturated aliphatic ethers having 6 to 30 carbon atoms Examples include heptyl ether, octyl ether, tetradecyl ether, hexadecyl ether, etc. In particular, linear saturated aliphatic ethers Group ethers are preferred.
- Linear or branched saturated or unsaturated aliphatic ketones having 6 to 30 carbon atoms Examples include methyl isobutyl ketone, diisobutyl ketone, heptanone, cyclohexanone, cycloheptanone, cyclooctanone, isophorone, etc. , linear saturated aliphatic ketones, etc. are preferred.
- Straight chain, branched, saturated or unsaturated aliphatic monoamines having 6 to 30 carbon atoms, such as hexylamine, heptylamine, octylamine, ethylhexylamine, decylamine, dodecylamine, tetradecylamine, hexadecylamine, octadecyl Examples include amine, icosylamine, docosylamine, tetracosylamine, pentacosylamine, hexacosylamine, heptacosylamine, octacosylamine, nonacosylamine, triacontylamine, oleylamine, linoleylamine, erucamine, ricinoleylamine, etc. , linear saturated aliphatic monoamines, etc. are preferred.
- Linear, branched, saturated, unsaturated aliphatic diamines having 6 to 30 carbon atoms Examples include hexyldiamine, heptyldiamine, octanediamine, decanediamine, dodecanediamine, etc. In particular, linear saturated Aliphatic diamines and the like are preferred.
- Straight chain, branched, saturated or unsaturated aliphatic monoamides having 6 to 30 carbon atoms, such as hexaneamide, heptaneamide, octaneamide, decanamide, dodecanamide, tetradecanamide, hexadecaneamide, octadecaneamide, icosanamide, docosanamide , tetracosanamide, oleic acid amide, linoleic acid amide, linolenic acid amide, arachidonic acid amide, erucic acid amide, etc. Also, fats that are reaction products of the above aliphatic monocarboxylic acids having 6 to 30 carbon atoms and amines. Among them, linear saturated aliphatic monoamides are particularly preferred.
- Linear, branched, saturated or unsaturated aliphatic diamides having 6 or more carbon atoms and 30 or less carbon atoms Examples include aliphatic diamides that are reaction products of the above-mentioned aliphatic dicarboxylic acids having 6 or more carbon atoms and 30 or less carbon atoms, and amines. In particular, linear saturated aliphatic diamides are preferred.
The amines used in the production of aliphatic monoamides and aliphatic diamides include, for example, the aliphatic monoamines mentioned above, or one or more selected from methylamine, ethylamine, propylamine, butylamine, and pentylamine.

In the present invention, in particular, as component (E), an aliphatic solvent having 6 to 12 carbon atoms (preferably 8 to 12 carbon atoms) and a fat having 13 to 30 carbon atoms (preferably 14 to 24 carbon atoms) It is preferable to use a group solvent in combination.
In addition, as component (E), it is preferable to use one or more selected from aliphatic hydrocarbons, aliphatic monoalcohols, aliphatic monoesters, aliphatic diesters, aliphatic monoamides, and aliphatic diamides, particularly aliphatic carbonized It is preferable to use a combination of hydrogen and an aliphatic monoester and/or an aliphatic diester.

The mixing amounts of such components (A), (B), (C), (D), and (E) are not particularly limited, but based on the total amount of the release agent,
(A) component 25% to 70% by weight (preferably 30% to 60% by weight, more preferably 35% to 50% by weight),
(B) component 20% by weight or more and 70% by weight or less (preferably 25% by weight or more and 65% by weight or less, more preferably 30% by weight or more and 60% by weight or less),
(C) component 0.1% to 10% by weight (preferably 0.5% to 8% by weight, more preferably 1.0% to 6% by weight),
(D) component 0.1% by weight or more and 10% by weight or less (preferably 0.5% by weight or more and 5% by weight or less),
(E) component 0.5% by weight or more and 10% by weight or less (preferably 1.5% by weight or more and 8% by weight or less),
It is preferable that

In addition to the components (A), (B), (C), (D), and (E), the release agent composition of the present invention includes, for example, a thickener, an oxidizing agent, a reducing agent, Additives such as resins, waxes, volatilization inhibitors, fragrances, colorants, dyes, and the like can 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.

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.

Examples of the volatilization inhibitor include glycerin, butanetriol, 2-methyl-propanetriol, pentanetriol, 2-methyl-butanetriol, trimethylolethane, hexanetriol, 2-ethyl-butanetriol, trimethylolpropane, and triethanol. Amine, triisopropanolamine, pentaerythritol, pentantetrol, hexanetetrol, diglycerin, ditrimethylolpropane, sorbitol, adonitol, arabitol, xylitol, triglycerin, dipentaerythritol, sorbitol, mannitol, iditol, inositol, dulcitol, talose , allose, tripentaerythritol,
Benzenetricarboxylic acids such as trimellitic acid and hemimellitic acid, benzenetetracarboxylic acids such as pyromellitic acid, benzenehexacarboxylic acids such as mellitic acid, cyclohexanetricarboxylic acids,
triaminotriethylamine, triethylenetetramine,
hexamethyl phosphate triamide,
etc., and one or more types of these can be used.

In addition, examples of solvents other than the above components (E) and (D) include 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 mono-2-ethylhexyl 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 mono Glycols such as ethyl ether acetate, diethylene glycol monobutyl ether acetate, ethyl acetate, butyl acetate, dimethyl sulfoxide, hexamethyl phosphoric acid triamide, N-methylpyrrolidone, sulfolane, chlorobutane, bromhexane, dichloromethane, 1,2−dichloroethane, 1 , 1−dichloroethane, chloroform, chlorinated polyethylene, chlorinated polypropylene, triglyceride, cyclohexanol, furfuryl alcohol, etc. can also be used.

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 16 were prepared by uniformly mixing the following raw materials in the weight proportions shown in Table 1.
A: Water B: Benzyl alcohol C1: Polyoxyethylene (20) Sodium lauryl ether sulfate C2: Polyoxyethylene (20) Stearyl ether C3: Polyoxyethylene (3) Sodium lauryl ether sulfate C4: Polyoxyethylene polyoxypropylene glycol
D: Xylene E1: Nonane E2: Octadecanol E3: Erucic acid amide E4: Hexadecanol E5: Octanol E6: Butanol E7: Methyl decanoate E8: Methyl oleate E9: Methyl propionate Volatization inhibitor: Glycerin thickener : Cellulose thickener Oxidizing agent: Hydrogen peroxide

(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 (1)

(A) Water 25% by weight or more and 70% by weight or less ,
(B) aromatic alcohol 20% by weight or more and 70% by weight or less ,
An aqueous stripper composition comprising:
(C) a surfactant having an alkyl group having 6 to 30 carbon atoms and an oxyalkylene unit from 0.1% by weight to 10% by weight ;
(D) aromatic solvent 0.1% to 10% by weight; (E) aliphatic solvent having 6 to 30 carbon atoms 0.5% to 10% by weight ;
Contains
(E) the aliphatic solvent having 6 to 30 carbon atoms contains one or more selected from nonane, octadecanol, erucic acid amide, hexadecanol, octanol, methyl decanoate, and methyl oleate;
An aqueous stripping agent composition characterized by: