JPH086054B2 - Peelable resin composition - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a releasable resin composition which forms a releasable film on a surface of an article or the like after being applied and dried, and the releasable resin composition which can be effectively used in a wide variety of applications. Is provided.

[0002]

2. Description of the Related Art A film is formed and placed on the surface of an article mainly for the purpose of protecting the surface of the article, and when the article is used, the film is peeled off to remove the article itself. Various so-called "stripable paints" for exposing the surface have been conventionally proposed as peelable coating compositions.

However, a conventional "stripable paint" of this type is disclosed in, for example, Japanese Patent Publication No. 44-28792.
Although proposed in JP-B-49-8690, it has various serious physical property defects.

Considering, for example, the case where the ventilation fan is used for preventing oil contamination, it is significantly inferior in heat-resistant peeling property. The ventilation fan is usually made of AS resin. When these strip fans are coated with the strippable paint described in the above-mentioned publication, they cannot be peeled off after half a year due to heating by steam during ventilation and exhaust. The same applies when the film is heated during drying. In the prior art, as described above, many plastics cannot be used because of their heat-resistant peeling properties. As for the transparency of the coating, there are many opaque materials, which in most cases impair the appearance. In particular, when it is applied to the stainless steel protection plate around the kitchen, it becomes a serious problem. Furthermore, when coated on a vertical surface such as a protective plate, it is liable to sag, and it causes serious defects such as staining unneeded portions or not being able to obtain a coating required to maintain peelability. I also have.

Accordingly, it is an object of the present invention to provide a further improved releasable resin composition which eliminates the above-mentioned deficiencies.

[0006]

DISCLOSURE OF THE INVENTION As a result of various studies aimed at providing a "stripable paint" which can meet the above-mentioned requirements, the present inventors have found that a specific water-dispersed resin contains a plurality of specific components. It has been found that a releasable resin composition suitable for a wide range of applications can be obtained by using together.

The present invention comprises 80 to 99% by weight of a water dispersion resin,
Amide compound 0.1 to 8% by weight, anionic surfactant 0.01 to 10% by weight, and polyhydric alcohol 0.01 to 5
A releasable resin composition, which comprises a weight percent and forms a releasable film, wherein the water-dispersed resin comprises a monomer having a polymerizable unsaturated bond, a surfactant, and It is intended to provide a peelable resin composition which is a water-dispersed resin obtained by emulsion polymerization in the presence of 1 to 10% by weight of anionic polyvinyl alcohol with respect to a monomer.

The peelable resin composition of the present invention contains the above water-dispersible resin in combination with the above-mentioned three components, so that the heat-resistant peelability, the transparency of the coating film, especially on the plastics substrate,
A good film with excellent coatability is formed, and as a water-dispersed resin, (meth) acrylic acid ester-based monomer, aromatic vinyl monomer, vinyl ester-based monomer and acrylonitrile-based monomer It is even more effective when a monomer obtained from one or more monomers selected from the group consisting of is used.

Hereinafter, the peelable resin composition of the present invention will be described in detail. The water-dispersible resin used in the peelable resin composition of the present invention comprises a monomer having a polymerizable unsaturated bond, a surfactant, and 1 to 10% by weight of anionized polyvinyl alcohol based on the monomer. The water-dispersed resin obtained by emulsion polymerization in the presence of the monomer having a polymerizable unsaturated bond used for obtaining the water-dispersed resin usually has a double bond having radical polymerizability. One or more chemical substances, and preferable specific examples thereof include (meth) acrylic acid ester-based monomers, vinyl ester-based monomers, aromatic Birni monomers, acrylonitrile-based monomers, and the like. Can be mentioned.

Examples of (meth) acrylic acid ester type monomers include methyl acrylate, ethyl acrylate,
Propyl acrylate, butyl acrylate, acrylic acid 2
Examples thereof include ethylhexyl, methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, and 2-ethylhexyl methacrylate. Of these, preferred are ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate,
Examples include methyl methacrylate. Examples of the vinyl ester-based monomer include vinyl acetate, vinyl propionate, vinyl butyrate, vinyl versatate, and the like. Among these, vinyl acetate and vinyl versatate are preferable.

Examples of the aromatic vinyl monomer include styrene, methylstyrene, dimethylstyrene, ethylstyrene, butylstyrene, benzylstyrene, chlorostyrene, and the like. Preferred of these are styrene and methylstyrene. Examples include styrene.

Examples of the acrylonitrile-based monomer include acrylonitrile and methacrylonitrile, and acrylonitrile is preferable. In obtaining the water-dispersed resin in the present invention, each of the above-mentioned monomers may be used alone or in combination of two or more.

Further, the above-mentioned monomer may be used in combination with other monomer. Other monomers that can be used include, for example, ethylenically unsaturated monomers having a carboxyl group, crosslinkable monomers, (meth) acrylic acid amide monomers, vinyl halide monomers, olefins. Examples include system monomers.

Examples of the ethylenically unsaturated monomer having a carboxyl group include maleic acid, fumaric acid, maleic anhydride, crotonic acid, acrylic acid, methacrylic acid, itaconic acid, and the like. Acrylic acid, methacrylic acid, itaconic acid, etc. are used.

Examples of the crosslinkable monomer include divinylbenzene, diallyl phthalate, triallyl cyanurate, triallyl isocyanurate, ethylene glycol dimethacrylate, hexylene glycol dimethacrylate, ethylene glycol diacrylate and hexylene glycol. Examples thereof include diacrylate, glycidyl acrylate, glycidyl methacrylate and the like.

Other monomers include acrylic amide, methacrylic amide, N-methylol acrylic amide, N-methylol methacrylic amide, N,
N'dimethyl acrylamide, hydroxyethyl acrylamide, dimethylaminoethyl methacrylate, tertiary butylaminoethyl methacrylate, aminoethyl acrylate, aminoethyl methacrylate, vinyl pyridine, vinyl chloride, vinylidene chloride, vinyl fluoride, ethylene, propylene, butadiene Etc.

In obtaining the above water-dispersed resin, one or more of the above-mentioned monomers may be selected and used in any combination. The above-mentioned water-dispersed resin is 100 parts by weight of butyl acrylate monomer. And acrylonitrile monomer, methyl methacrylate monomer, or styrene monomer 15 to 200
It is preferably composed of a water-dispersed resin obtained by using a combination of 20 parts by weight, preferably 20 to 150 parts by weight, and more preferably 20 to 120, especially butyl acrylate monomer and acrylonitrile monomer. A resin composed of the water-dispersed resin obtained by combining and using the above weight ratios is preferable.

The above water-dispersed resin is not necessarily limited by its viscosity, solid content, pH, glass transition temperature (Tg), molecular weight, average particle size, etc., and the releasability of the present invention. Although it can be changed depending on the use of the resin composition, in general, solid content (JIS-K682)
3) The concentration is 10 to 70% by weight, preferably 20 to 70% by weight, particularly preferably 30 to 65% by weight, and the viscosity (BH type rotational viscometer 20 rpm 25 ° C.) is 10 to 10,000 cps.
, Preferably 500 to 8000 cps, particularly preferably 500 to 5000 cps, and pH of 2 to 10, preferably 3.
-9, particularly preferably 4-9, with an average particle size of 0.01-
0.6 μ, preferably 0.02 to 0.5 μ, particularly preferably 0.05 to 0.5 μ is used, and in particular, it is possible to increase the solid content concentration and viscosity by using the above preferable range. It is possible to form a quality releasable resin composition of the present invention. The resin content concentration in the solid content of the water-dispersed resin is usually 99 to 90%, preferably 9%.
7 to 92% is used.

Further, to form the aqueous dispersion resin, said homopolymer obtained from monomers or copolymer has a glass transition temperature (hereinafter abbreviated as Tg) is generally from 229 to 303
K, more preferably 233 to 283 K, is used, and by using a water-dispersed resin formed of a homopolymer or a polymer having Tg in the above range, excellent peelability and tack can be obtained throughout the winter and summer. The peelable resin composition of the present invention can be obtained. The Tg is calculated by the following formula. Calculation formula of Tg: 1 / Tg = W ₁ / Tg ₁ + W ₂ / Tg ₂ + ... + Wn / Tgn In the formula, Tg and Tgn are expressed in absolute temperature. Wn represents the weight fraction of each monomer component of the polymer. The Tg of the polymer of each monomer is shown in the following [Table 1].

[0020]

[Table 1]

Further, the emulsion polymerization method, which is a polymerization means for obtaining the water-dispersed resin in the present invention from the above-mentioned monomers, is a known method, and a surfactant and a surfactant are added in an aqueous medium in the presence of a catalyst. It is carried out under the coexistence condition of anionized polyvinyl alcohol.

As the surfactant used in the above emulsion polymerization, anionic surfactants such as sodium oleate, semi-cured beef tallow, potassium oleate, fatty acid salts such as sodium lauryl sulfate ester, and higher alcohol sulfuric acid can be used. Higher alcohol sulfate ester salts such as ester soda, lauryl alcohol sulfate triethanolamine salt, lauryl alcohol sulfate ammonium salt, etc., alkylbenzene sulfonate such as sodium dodecylbenzene sulfonate, alkylnaphthalene sulfonate such as alkylnaphthalene sodium sulfonate, etc. , naphthalenesulfonic acid formalin condensate, dioctyl sulfonium dialkyl sulfosuccinic salts such as succinic acid sodium, alkyl phosphates, and adding ethylene oxide to the anionic surfactant And the like, these may be used in also in combination of two or more of them used alone.

In addition to the above-mentioned anionic surfactants, nonionic surfactants such as polyoxyethylene alkyl ethers such as polyoxyethylene oleyl ether and polyoxyethylene lauryl ether, polyoxyethylene nonylphenyl ether, polyoxyethylene. Polyoxyethylene alkyl phenyl ethers such as octyl phenyl ether, polyoxyethylene monolaurate, polyoxyethylene alkyl esters such as polyoxyethylene monostearate, sorbitan monolaurate, sorbitan esters such as sorbitan monostearate, polyoxyethylene Polyoxyethylene sorbitan alkyl ester such as sorbitan monolaurate, polyoxyethylene polypropylene block polymer, polyethylene glycol It can also be used in combination.

Further, an amphoteric surfactant, for example, a betaine-type amphoteric surfactant such as dimethylalkyl betaine, lauryl betaine and stearyl betaine, and a small amount of a cationic surfactant can be used in combination.

Further, examples of the catalyst used in the above emulsion polymerization include persulfates such as ammonium persulfate, potassium persulfate and sodium persulfate, hydrogen peroxide, tertiary butyl hydroperoxide, cumene hydroperoxide and the like. And the like, and preferable examples thereof include persulfate and hydrogen peroxide.

The peelable resin composition of the present invention is coated by using the above anionized polyvinyl alcohol in an amount of 1 to 10% by weight, preferably 0.5 to 5% by weight, based on the total amount of monomers. and have you both a good leveling and sagging resistance during use, and during peeling has high film strength
Ku, and peeling a thin film rather easily, more characteristics are imparted as excellent water adhesion. Examples of the anionized polyvinyl alcohol include an olefin sulfonic acid alkali salt and vinyl acetate in the presence of an alcohol solvent in which the content of the olefin sulfonic acid alkali salt is 0.5 to 7 mol%.
Modified polyvinyl alcohol obtained by saponifying a copolymer copolymerized as follows. Commercially available products include Gosselan L-3266 (saponification degree 86 to 89%, degree of polymerization 250 to 300, Nippon Synthetic Chemical Industry Co., Ltd. (Manufactured by Co., Ltd.).

In the emulsion polymerization, a reducing agent may be used in combination if desired. Examples thereof include reducing organic compounds such as ascorbic acid, tartaric acid, citric acid, and glucose, sodium thiosulfate, sodium sulfite, sodium bisulfite, and sodium metabisulfite.

The reaction temperature in the emulsion polymerization can be appropriately selected, and for example, a temperature of about 40 to about 90 ° C. can be exemplified. During the reaction, the total amount of the predetermined surfactant can be added to the reaction system, but a part of the surfactant is added to the reaction system in advance to start the reaction, and the rest is continuously added or at intervals during the reaction. It is also possible to add them in portions, and the latter is preferred. Also, for each monomer, add them as they are,
Alternatively, they can be added in portions or continuously, but continuous addition is preferred from the viewpoint of reaction control.

In addition to the above-mentioned surfactants and catalysts, a pH adjusting agent, a polymerization degree adjusting agent, an antifoaming agent and the like can be added appropriately during emulsion polymerization.

In the peelable resin composition of the present invention, the water-dispersed resin is used as a film-forming substance, and the content of the water-dispersed resin in the peelable resin composition is from 80 to 80%.
It is 99% by weight, preferably 85 to 97% by weight.

Further, peeling resin composition of the present invention, the upper Symbol
An amide compound, an anionic surfactant, and a polyhydric alcohol are contained as an additive together with the water- dispersed resin. Next, these additives will be described.

The above amide compound has a function of imparting good releasability to the releasable resin composition of the present invention mainly on the substrate after peeling without leaving cloudiness, and examples of the amide compound include: Organic carboxylic acid amides such as stearic acid amide, ricinoleic acid amide, oleic acid amide, and lauric acid amide, ethylene bisamides such as ethylenebisstearic acid amide, alkylsulfanamide carboxylic acids such as stearin sulfanamide carboxylic acid, and salts thereof. And the like, preferably stearic acid amide, sodium alkylsulfanamide carboxylic acid, etc., and the amount thereof is, in the peelable resin composition of the present invention,
The amount is 0.1 to 8% by weight, preferably 0.5 to 6% by weight, more preferably 0.5 to 4% by weight.

The above-mentioned anionic surfactant has a function of imparting to the releasable resin composition of the present invention, mainly, the releasability of the film formed by the composition after a long period of time. Examples of the anionic surfactant include anionic surfactants that can be used during emulsion polymerization when obtaining the water-dispersed resin, preferably sodium lauryl sulfate, sodium dodecylbenzene sulfonate, and the like. The amount used in the peelable resin composition of the present invention,
It is 0.01 to 10% by weight, preferably 0.05 to 7% by weight, and more preferably 0.1 to 3% by weight.

The polyhydric alcohol has a function of imparting good releasability to the releasable resin composition of the present invention mainly when heated (solar heat or heating during drying). Examples of the polyhydric alcohol include ethylene glycol, propylene glycol, glycerin, catechol, butanediol, pentanediol, erythritol, glycerin monoalkyl ester, polyethylene glycol, polypropylene glycol and the like, preferably ethylene glycol, propylene glycol, glycerin and the like. The amount used is 0.01 to 5% by weight, preferably 0.05 to 3% by weight, and more preferably 0.1 to 2% by weight in the peelable resin composition of the present invention. Further, the amide compound,
Anionic surfactant and polyhydric alcohol are 100:
It is preferable to use it in a weight ratio of 5 to 50: 1 to 30 from the viewpoints of releasability, clouding of the peeled surface and the like.

In addition to the above-mentioned additives, the peelable resin composition of the present invention contains a wax, a film-forming aid, an antifoaming agent, a plasticizer, a thickener, a pH adjuster, an antiseptic, an antifungal agent. , An antifreezing agent and the like can be added as appropriate.

Wax refers to natural or synthetic wax, paraffin, and wax, for example, natural animal and plant whale oil,
Carnauba wax, beeswax, sheep's fat, candelilla wax, montan wax,
China wax, wood wax, petroleum paraffin wax, petrolatum,
Liquid paraffin, synthetic polyethylene, wax such as polypropylene, glycerin fatty acid ester, etc. may be mentioned. Preferable examples include liquid paraffin and synthetic wax emulsion. The wax has the effect of further enhancing the releasability of the releasable resin composition of the present invention after drying, and the amount used is 100 parts by weight of the water-dispersed resin ,
Usually, it is about 0 to 6 parts by weight, preferably 0.5 to 4 parts by weight.

Examples of film-forming aids include methyl cellosolve, ethyl cellosolve, butyl cellosolve, methyl carbitol, ethyl carbitol, butyl carbitol, dibutyl carbitol, methyl cellosolve acetate, ethyl cellosolve acetate, butyl cellosolve acetate, methyl carbitol acetate, Ethyl carbitol acetate, butyl carbitol acetate,
Benzyl alcohol, benzyl acetate, toluene,
Xylene, petroleum hydrocarbons, texanol and the like, preferably butyl carbitol, butyl cellosolve acetate, butyl carbitol acetate, texanol and the like, when the peelable resin composition of the present invention forms a film, the film formation temperature The effect of lowering the amount of the water-dispersed resin is generally about 0.5 to 100 parts by weight of the water-dispersed resin.
15 parts by weight, preferably about 1-8 parts by weight. Defoaming agents include, for example, silica-silicone-based, silicone-based, metal soap-based, fatty acid amide-based, fatty acid ester-based, polyether-based, polyglycol-based, organic phosphoric acid-based, higher alcohol-based, sulfonated fatty acid-based, oil-soluble Examples thereof include a polymer type, preferably a silicone type, a silica silicone type, a metal soap type, a fatty acid amide type, or a composite type thereof. When the peelable resin composition of the present invention is transported or subdivided, Also, it has a defoaming effect at the time of application, and the amount thereof is generally 0.001 to 1 part by weight with respect to 100 parts by weight of the water-dispersed resin.

The releasable resin composition of the present invention may be applied to, for example, wind paint, application to the water pipe port,
When used for applications such as masking for plating in which peeling is not forgotten when used, the colorant is usually contained in the peelable resin composition in an amount of 1 to 20% by weight, preferably 1 to 15% by weight. You can

The releasable resin composition of the present invention has the above composition, and the preferred amounts (compositions) of the respective components in the releasable resin composition of the present invention are summarized as follows. is there. Parts by weight-the above water-dispersed resin 85-97-amide compound 0.5-6-anionic surfactant 0.1-3-polyhydric alcohol 0.1-2

Further, the peelable resin composition of the present invention more preferably contains the following components in the following amounts with respect to the above composition. Parts by weight-film forming aid 0.8-8-wax 0.4-4-antifoaming agent 0.001-1-preservative 0.01-2-thickener 0.01-5-plasticizer 0- 2 ・ Colorant 1 to 20

In addition, in the claims of the present invention, a black pigment or a white pigment is added as a colorant to the peelable resin composition of the present invention, and the composition is used for writing ink or white juice. It is not included when it is used for.

[0042]

The present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited thereto.

Example 1 [Example 1-1] 400 g of water and 5 g of anion-modified Poval (Goselan L-3266) were added and dissolved in a 2 liter glass flask equipped with a stirrer. On the other hand, water 13
Polyoxyethylene nonyl phenyl ether (ethylene oxide addition mole number: about 30 moles) 20 g and sodium dodecylbenzene sulfonate 3 g were dissolved in 0 g, and 370 g of butyl acrylate and 230 g of acrylonitrile were added to the surfactant aqueous solution, followed by stirring and mixing. And a monomer mixture is obtained. Then, after substituting the inside of the flask with nitrogen, while maintaining the reaction temperature at 70 ° C. in an aqueous solution in the flask,
The above monomer mixture, 4% ammonium persulfate aqueous solution 50
g and 50 g of 4% sodium metabisulfite were added over 5 hours for emulsification and polymerization to obtain an emulsion (water dispersion resin) having a solid content of about 50%.

Example 1-2 100 parts of the emulsion obtained in the above [Example 1-1] was added to 3 parts of laurylsulfanamidocarboxylic acid Na and 30% of lauryl sulfate Na salt.
Aqueous solution 1.8 parts, ethylene glycol 0.5 part, thickener, adjusted water were added to give a viscosity of about 2700 cps and a solid content of about 47.
%, PH 6.2, a releasable resin composition was obtained. The releasable resin composition is coated on a synthetic resin plate having a smooth surface to a coating thickness of about 2
After being coated so as to have a thickness of 00 μ and dried by heating at 30 ° C. for 2 hours, the peel resistance was measured and found to be 195 g.
It was / cm.

Example 2 [Example 2-1] 400 g of water and 5 g of anion-modified Poval (Goselan L-3266) were added and dissolved in a 2 liter capacity glass flask equipped with a stirrer. On the other hand, water 13
Polyoxyethylene nonyl phenyl ether (ethylene oxide addition mole number: about 30 moles) 20 g and sodium dodecylbenzene sulfonate 3 g were dissolved in 0 g, and 370 g of butyl acrylate and 230 g of acrylonitrile were added to the surfactant aqueous solution, followed by stirring and mixing. And a monomer mixture is obtained. Then, after substituting the inside of the flask with nitrogen, while maintaining the reaction temperature at 70 ° C. in an aqueous solution in the flask,
The above monomer mixture, 4% ammonium persulfate aqueous solution 50
g and 50 g of 4% sodium metabisulfite were added over 5 hours for emulsification and polymerization to obtain an emulsion (water dispersion resin) having a solid content of about 50%.

[Example 2-2] To 100 parts of the emulsion obtained in the above-mentioned [Example 2-1], 3 parts of an equivalent mixture of Na lauryl sulfanamide carboxylic acid and liquid paraffin, 30% aqueous solution of lauryl sulfate Na salt 1 2.8 parts, ethylene glycol 0.5 part, butyl carbitol 3 parts, tributoxy phosphate 1.0 part, antifoaming agent 0.1 part, preservative 0.1 part, thickener, adjusted water, Viscosity about 2700
A peelable resin composition having a cps, solid content of about 47% and pH 6.2 was obtained. Regarding the peelable resin composition, [Example 1-
When the peel resistance was measured in the same manner as in 2), the peel resistance was 100 g / cm.

Example 3 [Example 3-1] 400 g of water, 20 g of anion-modified Poval (Goselan L-3266) and 2 g of 30% aqueous solution of lauryl sulfate Na salt were added and dissolved in a 2 liter capacity glass flask equipped with a stirrer. . On the other hand, in an aqueous surfactant solution obtained by dissolving 5 g of polyoxyethylene nonylphenyl ether (ethylene oxide addition mole number: about 30 mol) and 20 g of a 30% lauryl sulfate Na salt solution in 130 g of water, 390 g of butyl acrylate and acrylonitrile. A mixed liquid of 180 g and 30 g of methyl methacrylate is added and mixed by stirring to obtain a monomer mixture. Then, after the inside of the flask was replaced with nitrogen, 5 g of the monomer mixture, 50 g of 4% ammonium persulfate aqueous solution and 50 g of 4% sodium metabisulfite were added to the aqueous solution in the flask while maintaining the reaction temperature at 70 ° C. The mixture was added over time to emulsify and polymerize to obtain an emulsion (water dispersion resin) having a solid content of about 50%.

Example 3-2 100 parts of the emulsion obtained in the above [Example 3-1] was added to an equivalent mixture of Na laurylsulfanamidocarboxylic acid and liquid paraffin.
Parts, dodecylbenzene sulfonic acid Na 0.5 parts, ethylene glycol 0.3 parts, butyl carbitol 2 parts, tributoxy phosphate 0.3 parts, antifoaming agent 0.1 parts, preservative 0.1 part, thickening Add agents and adjusted water, viscosity about 3100
A peelable resin composition having a cps, solid content of about 45% and pH 6.0 was obtained. The peel resistance of the above peelable resin composition was measured in the same manner as in Example 1, and it was 150 g / cm.

Examples 4 to 7 Various emulsions (water-dispersed resins) were obtained in the same manner as in [Example 1-1] except that the surfactant used in the production of emulsion was changed as shown in [Table 2] below. Further, using the obtained emulsion, various compositions were obtained in the same manner as in [Example 1-2], except that the resin composition and compounding additives were changed as shown in [Table 2] below. Each of the above compositions was subjected to the same tests as in Example 1. The results are shown in the following [Table 3] together with the results of Examples 1 to 3. The releasability in [Table 3] was evaluated by a 10-point method. The case where the film was easily completely peeled was set to 10, and the one which could not be peeled was set to 1. In addition, Table 3 also shows Tg of the resin which is a constituent of the composition. Further, the peelable resin compositions obtained in Examples 1 to 7 described above were tested for peeling resistance after water immersion and water resistance according to the following measuring methods and evaluation criteria. The results are also shown in [Table 3].

[Measurement Method] -Peeling Resistance after Immersion in Water-The peelable resin composition was applied on a synthetic resin plate having a smooth surface so as to have a coating thickness of about 200 µ, and dried by heating at 30 ° C for 2 hours. After the sample piece was immersed in water for 1 hour, the peel resistance was measured.

[Evaluation Criteria for Water Resistance] O: The coating film adheres to the plate in the above-mentioned test piece after immersion in water and is easily peeled off. (Triangle | delta): In the said test piece after water immersion, although a coating film has adhere | attached on the board, it is hard to peel. X: The coating film in the above-mentioned test piece after immersion in water spontaneously peels off without sticking to the plate.

[0052] except using no Comparative Example 1 anionically modified port bar, in the same manner as in Example 1, a viscosity of about 1500 cps, about 47% solids, pH
A peelable resin composition of 6.2 was obtained. The releasable resin composition is coated on a synthetic resin plate having a smooth surface with a coating thickness of about 200 μm.
And dried by heating at 30 ° C. for 2 hours,
The peel resistance was measured and found to be 2300 g / cm.
Met. Furthermore, the same tests as in Examples 1 to 7 described above were performed. The results are shown in Table 3.

[0053] Po bar is a non-modified polyvinyl alcohol Comparative Example 2 anion-modified port bar [KK Kuraray "PVA-205"]
A viscosity of about 2 was obtained in the same manner as in Example 1 except that 5 g was used.
A releasable resin composition having a solid content of about 47% and a pH of 6.2 was obtained at 000 cps. The releasable resin composition is applied on a synthetic resin plate having a smooth surface so as to have a coating thickness of about 200 μ,
After heat-drying at 30 ° C. for 2 hours, the peel resistance was measured and found to be 115 g / cm. Furthermore, the same tests as in Examples 1 to 7 described above were performed. The results are shown in [Table 3].

[0054]

[Table 2]

[0055]

[Table 3]

Use Example 1 The composition obtained in Example 2 was applied to a ventilation fan made of AS resin by a brush, dried at 25 ° C. for 1 hour, and then used for 6 months at home. After 6 months, the ventilation fan was contaminated with oil and the like, but the coating film could be easily peeled off, and the ventilation fan after peeling was clean and was the same as before use.

USE EXAMPLE 2 The composition obtained in Example 3 was applied by brush to a stainless steel protective plate around a domestic kitchen. There was almost no sagging, the coatability was good, and the film was transparent. After drying at room temperature, use was started and used for 6 months. After undergoing considerable heat history such as hot air from the gas range, the coating film could be easily peeled off after 6 months, and the stainless steel plate after peeling was clean and remained unchanged from before use.

USE EXAMPLE 3 A red colored paint (emulsion color) was further added to the formulation obtained in Example 1 and a mark "x" was written on the glass window with a brush. The coating was glossy and clear. Although it was exposed to sunlight and fluorescent light, it did not spontaneously peel off and could be peeled off easily after 3 months.

USE EXAMPLE 4 The formulation obtained in Example 1 was brush coated onto PVC tile in a laboratory. Although it was affected by walking and moisture during cleaning for 6 months, after 6 months it could be easily peeled off and the PVC tile was clean as before use.

[0060]

EFFECTS OF THE INVENTION The peelable resin composition of the present invention eliminates the above-mentioned deficiencies and is further improved. The peelable resin composition of the present invention having the above-mentioned constitution is used in various applications. It is as follows when it demonstrates together with an effect.

[Use] Coating on the surface of ventilation fans, kitchen appliances, etc. [Effect] -Prevention of oil stains.・ Because the length of peeling off the coating is good for cleaning work, there is no need to worry about scratching the object to be cleaned during cleaning work. -Effective for parts that cannot be removed and washed.

[Use] Wind paint [Effect] The paint after coating and drying has gloss and a beautiful appearance. -Easy to remove paint.・ Does not disappear even when exposed to rain.・ Even if another paint is applied again after applying and drying the paint, the paint already applied does not bleed.・ After applying and drying the paint, it is possible to form characters by hollowing out the film.・ Calling attention to “window glass” during construction.

[Use] Epoxy lining water and sewage pipe (internal) coating [Effect] -Prevents chalking from occurring in the epoxy lining part of the water sewage pipes to be piled up (peeling off the film during use). -Does not stain inside.

[Use] Masking for plating [Effect] -Masking for areas not requiring plating.

[Use] Coating on the floor of the factory or on the laboratory bench [Effect] -Protection of the base material from adhesion of oil, chemicals and other pollutants and scratches.

[Use] Masking at the time of painting [Effect] ・ Easy to mask even where it is difficult to mask with a sheet due to the shape of the object to be coated.・ It is hard to be damaged by paint.・ Can be used for hollow coating after application and drying.

[Use] Coating on surface of gypsum product [Effect] -Prevents stains and scratches on gypsum products such as portraits.

[Use] Coating on the surface of parts including IC [Effect] -Prevents adhesion of dust, corrosion, dirt and the like. -Like the conductive paint, it is applied as a paint to protect it from magnetism (peeling off the film during housing and assembly).

[Use] For cold working [Effect] -Prevents scratches during cold working of metal.

[Usage] Coating on the character original plate [Effect] ・ Apply to the character original plate during spray painting, and peel off when a large amount of paint has arrived (improve the working environment, remove the conventional paint by washing it with a solvent. Was).

[Use] Coating on helmet [Effect] -Prevention of dirt. -Prevents scratches.

Claims (3)

[Claims] 1. A water-dispersed resin 80 to 99% by weight, an amide compound 0.1 to 8% by weight, and an anionic surfactant 0.01.
A releasable resin composition containing 10 to 10% by weight and 0.01 to 5% by weight of a polyhydric alcohol to form a peelable film, wherein the water-dispersed resin has a polymerizable unsaturated bond. 1 to 10% by weight of the monomer having a surfactant and the monomer.
A releasable resin composition which is a water-dispersed resin obtained by emulsion polymerization in the presence of the anionized polyvinyl alcohol. 2. The monomer having a polymerizable unsaturated bond is a (meth) acrylic acid ester-based monomer, an aromatic vinyl monomer, a vinyl ester-based monomer and an acrylonitrile-based monomer. The releasable resin composition according to claim 1, which is one or more monomers selected from the group consisting of: 3. The water-dispersible resin comprises 100 parts by weight of butyl acrylate monomer, acrylonitrile monomer, methyl methacrylate monomer, or styrene monomer 15 to 20.
0 parts by weight, preferably 20 to 150 parts by weight, more preferably 20 to 120 parts by weight, are used in combination.
The peelable resin composition according to claim 1.