Stripping composition

Abstract

To provide a release agent composition that has a release effect with excellent fast-acting and long-lasting properties.SOLUTION: A release agent composition contains a dibasic acid ester, a fatty acid monoester, and an aliphatic hydrocarbon compound and / or aromatic hydrocarbon compound.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a stripping composition that exhibits rapid and sustained stripping effect. [Background technology]

[0002] Methods for repainting a coating film (old coating film) formed on the surface of a building, civil engineering structure, etc. include painting a new paint on top of the old coating film, or peeling off the old coating film and painting a new coating, etc. Conventionally, in terms of cost and shortening the construction period, repainting has often been done by painting a new paint on top of the old coating film, and currently there are many buildings and civil engineering structures that have had two or three coats of paint applied over the old coating film.

[0003] However, if new paint is applied multiple times on top of an old paint film that has already deteriorated, the paint film itself may become heavy and place a strain on the substrate. Also, the thickness of the paint film itself may become too thick and compress the space. Furthermore, high-performance paint films have appeared in recent years, and it may be difficult to apply new paint on top of a paint film.

[0004] Due to these problems, recently, the method of first peeling off the old paint film has become more common. Methods for removing old coatings include physical methods such as sanding, blasting, high-pressure water spraying, and chisel chipping, as well as chemical methods using chemicals and solvents, but recently, from the perspective of problems such as damage to the base and scattering of dust, as well as environmental considerations, stripping agents using dibasic acid ester solvents have come to be used (for example, Patent Document 1, etc.). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2012-166143 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the case of Patent Document 1, it sometimes took a long time for the stripping agent to become peelable after application. Furthermore, the duration for which the stripping agent can be peeled off was sometimes short, and the development of a stripping agent that can be peeled off more quickly and that can be peeled off for a longer period of time has become an issue. [Means for solving the problem]

[0007] The present invention has been made in consideration of these problems, and it has been discovered that in a stripping agent composition containing a dibasic acid ester, by containing a fatty acid monoester and an aliphatic hydrocarbon compound and / or an aromatic hydrocarbon compound, the composition has excellent quick-acting properties, making the composition capable of being stripped sooner after application, and also has excellent durability, making the composition capable of being stripped for a long period of time, which has led to the completion of the present invention.

[0008] That is, the present invention has the following features. 1. A stripping composition comprising a dibasic acid ester, Further, the present invention relates to a composition comprising a fatty acid monoester and an aliphatic hydrocarbon compound and / or an aromatic hydrocarbon compound. fruit, The fatty acid monoester includes a saturated fatty acid monoester and an unsaturated fatty acid monoester. A stripping agent composition comprising: 2. The stripping composition according to 1, wherein the mixing ratio (weight ratio) of the dibasic acid ester to the fatty acid monoester is from 20:80 to 80:20. Effect of the Invention

[0009] The stripping composition of the present invention is excellent in terms of quick-acting ability to quickly make the film ready for stripping, and in terms of durability to maintain the ready-to-remove state for a long period of time. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described.

[0011] The stripping agent composition of the present invention is characterized by containing a dibasic acid ester, a fatty acid monoester, and an aliphatic hydrocarbon compound and / or an aromatic hydrocarbon compound. The present invention was developed based on the discovery that dibasic acid esters and fatty acid monoesters are highly compatible with each other, and that mixing the dibasic acid esters with fatty acid monoesters facilitates penetration into the old paint film, allowing the dibasic acid esters to quickly exert their stripping effect (fast-acting), while the fatty acid monoesters are less likely to volatilize, allowing the stripping effect of the dibasic acid esters to be sustained for a long period of time (sustaining). Furthermore, in the present invention, it has been found that the above-mentioned immediate effect and duration can be improved by including an aliphatic hydrocarbon compound and / or an aromatic hydrocarbon compound. That is, since an aliphatic hydrocarbon compound and / or an aromatic hydrocarbon compound easily penetrates into the old coating film and easily softens the coating film, a stripping agent composition having excellent stripping effect (immediate effect, duration) can be obtained. In particular, when an aliphatic hydrocarbon compound is included, the duration of the stripping effect can be improved, and when an aromatic hydrocarbon compound is included, the immediate effect of the stripping effect can be improved. Furthermore, the present invention provides an excellent quick-acting and long-lasting peeling effect not only at room temperatures of 10°C or higher, but also at low temperatures of less than 10°C.

[0012] Examples of the dibasic acid ester include ester compounds of dicarboxylic acids having an alkyl segment having from 2 to 12 carbon atoms and alkyl alcohols having from 1 to 12 carbon atoms. Specifically, dimethyl succinate, dimethyl glutarate, dimethyl adipate, dimethyl phthalate, dimethyl maleate, diethyl succinate, diethyl glutarate, diethyl adipate, diethyl phthalate, diethyl maleate, diisobutyl succinate, diisobutyl glutarate, diisobutyl adipate, diisobutyl phthalate, diisobutyl maleate, dibutyl succinate, dibutyl glutarate, and dibutyl adipate. , dibutyl phthalate, dibutyl maleate, dihexyl succinate, dihexyl glutarate, dihexyl adipate, dihexyl phthalate, dihexyl maleate, di-2-ethylhexyl succinate, di-2-ethylhexyl glutarate, di-2-ethylhexyl adipate, di-2-ethylhexyl phthalate, di-2-ethylhexyl maleate, etc., and one or more of these can be used. In the present invention, it is particularly preferable to include one or more selected from dimethyl glutarate and dimethyl adipate. The content of the dibasic acid ester is preferably from 15 to 70% by weight, more preferably from 25 to 65% by weight, based on the total amount of the composition. The dibasic acid ester is a component that mainly imparts a peeling effect, and the above content allows the composition to exhibit an excellent peeling effect.

[0013] Examples of fatty acid monoesters include ester compounds of fatty acids and alkyl alcohols. In particular, ester compounds of fatty acids having 6 to 24 carbon atoms (preferably 8 to 20 carbon atoms) and alkyl alcohols having 1 to 24 carbon atoms (preferably 1 to 12 carbon atoms) can be preferably used. Specifically, methyl hexanoate, ethyl hexanoate, butyl hexanoate, hexyl hexanoate, heptyl hexanoate, octyl hexanoate, methyl heptanoate, ethyl heptanoate, propyl heptanoate, butyl heptanoate, hexyl heptanoate, octyl heptanoate, methyl octanoate, ethyl octanoate, propyl octanoate, butyl octanoate, pentyl octanoate, hexyl octanoate, heptyl octanoate, octyl octanoate, methyl nonanoate, ethyl nonanoate, propyl nonanoate, butyl nonanoate, pentyl nonanoate, heptyl nonanoate, methyl decanoate, ethyl decanoate, propyl decanoate, butyl decanoate, hexyl decanoate, and heptyl decanoate. saturated fatty acid monoesters such as methyl dodecanoate, ethyl dodecanoate, propyl dodecanoate, butyl dodecanoate, hexyl dodecanoate, heptyl dodecanoate, octyl dodecanoate, methyl tetradecanoate, ethyl tetradecanoate, propyl tetradecanoate, butyl tetradecanoate, tetradecyl tetradecanoate, methyl hexadecanoate, ethyl hexadecanoate, propyl hexadecanoate, butyl hexadecanoate, 2-ethylhexyl hexadecanoate, methyl octadecanoate, ethyl octadecanoate, propyl octadecanoate, butyl octadecanoate, 2-ethylhexyl octadecanoate, octadecyl octadecanoate, methyl eicosanoate, and ethyl eicosanoate; Methyl palmitoleate, Ethyl palmitoleate, Methyl oleate, Ethyl oleate, Propyl oleate, Butyl oleate, Pentyl oleate, Heptyl oleate, 2-Ethylhexyl oleate, Methyl elaidate, Ethyl elaidate, Propyl elaidate, Butyl elaidate, Pentyl elaidate, 2-Ethylhexyl elaidate, Methyl linoleate, Ethyl linoleate, Propyl linoleate, Isopropyl linoleate, Butyl linoleate, Pentyl linoleate, Hexyl linoleate, Heptyl linoleate, 2-Ethylhexyl linoleate, Methyl linoleate, Ethyl linoleate, Propyl linoleate, Butyl linoleate, Pentyl linoleate, Hexyl linoleate, Heptyl linoleate, 2-Ethylhexyl linoleate unsaturated fatty acid monoesters such as methyl arachidonate, ethyl arachidonate, butyl arachidonate, 2-ethylhexyl arachidonate, methyl eicosenoate, ethyl eicosenoate, butyl eicosenoate, heptyl eicosenoate, 2-ethylhexyl eicosenoate, methyl eicosapentaenoate, ethyl eicosapentaenoate, butyl eicosapentaenoate, 2-ethylhexyl eicosapentaenoate, methyl erucate, ethyl erucate, butyl erucate, 2-ethylhexyl erucate, methyl docosahexaenoate, ethyl docosahexaenoate, butyl docosahexaenoate, 2-ethylhexyl docosahexaenoate, methyl ricinoleate, ethyl ricinoleate, butyl ricinoleate, heptyl ricinoleate, and 2-ethylhexyl ricinoleate; Alternatively, monoesters such as coconut oil fatty acid, palm oil fatty acid, rapeseed oil fatty acid, soybean oil fatty acid, hydrogenated soybean oil fatty acid, linseed oil fatty acid, tung oil fatty acid, tall oil fatty acid, dehydrated castor oil fatty acid, castor oil fatty acid, grape seed oil fatty acid, black cumin oil fatty acid, pumpkin kernel oil fatty acid, borage seed oil fatty acid, wheat germ oil fatty acid, rapeseed oil fatty acid, sunflower oil fatty acid, peanut oil fatty acid, apricot kernel oil fatty acid, pistachio oil fatty acid, almond oil fatty acid, olive oil fatty acid, macadamia nut oil fatty acid, avocado oil fatty acid, sea buckthorn oil fatty acid, sesame oil fatty acid, hemp oil fatty acid, hazelnut oil fatty acid, primrose oil fatty acid, wild rose oil fatty acid, safflower oil fatty acid, and walnut oil fatty acid, and biodiesel, etc., can be mentioned, and one or more of these can be used. In the present invention, it is particularly preferred to contain an unsaturated fatty acid monoester, and in particular, one or more selected from methyl oleate, methyl linoleate, methyl linolenate, and the like can be preferably used. The content of the fatty acid monoester is preferably such that the mixing ratio (weight ratio) of the dibasic acid ester to the fatty acid monoester is from 20:80 to 80:20, and more preferably from 30:70 to 70:30. By using such a mixing ratio, it is possible to obtain a stripping composition that exhibits an excellent immediate and sustained stripping effect.

[0014] Examples of the aliphatic hydrocarbon compound include pentane, hexane, heptane, octane, nonane, decane, dodecane, tetradecane, pentadecane, hexadecane, octadecane, nonadecane, paraffin, cyclopentane, cyclohexane, cycloheptane, cyclooctane, methylcyclopentane, ethylcyclopentane, methylcyclohexane, ethylcyclohexane, propylcyclohexane, butylcyclohexane, pentylcyclohexane, hexylcyclohexane, dimethylcyclohexane, diethylcyclohexane, dibutylcyclohexane, and the like. One or more of these can be used. When an aliphatic hydrocarbon compound is contained, the content of the aliphatic hydrocarbon compound is preferably 1% by weight or more and 20% by weight or less, and more preferably 2% by weight or more and 15% by weight or less, based on the total amount of the composition. By containing an aliphatic hydrocarbon compound, the durability of the peeling effect can be particularly improved.

[0015] Examples of aromatic hydrocarbon compounds that can be used include benzene, toluene, xylene, ethylbenzene, diethylbenzene, trimethylbenzene, triethylbenzene, propylbenzene, butylbenzene, pentylbenzene, hexylbenzene, octylbenzene, biphenyl, terphenyl, diphenylethane, (methylphenyl)phenylethane, dimethylbiphenyl, benzyltoluene, naphthalene, methylnaphthalene, ethylnaphthalene, butylnaphthalene, and the like; or industrial aromatic hydrocarbon solvents such as Swazol 1000, Swazol 1500 (manufactured by Maruzen Petrochemical Co., Ltd.), Solvesso 100, and Solvesso 150 (manufactured by Exxon Mobil Corp.), and the like. When an aromatic hydrocarbon compound is contained, the content of the aromatic hydrocarbon compound is preferably 5% by weight or more and 50% by weight or less, more preferably 10% by weight or more and 40% by weight or less, based on the total amount of the composition. By containing an aromatic hydrocarbon compound, the immediate effect of the peeling effect can be particularly improved.

[0016] The aliphatic hydrocarbon compound and aromatic hydrocarbon compound can be appropriately selected and used depending on the application requiring immediate and sustained peeling effect. In the present invention, it is preferable to use an aliphatic hydrocarbon compound and an aromatic hydrocarbon compound, and it is preferable to use more of the aliphatic hydrocarbon compound for applications requiring more sustained peeling effect, and more of the aromatic hydrocarbon compound for applications requiring more immediate peeling effect.

[0017] In addition to the above-mentioned components, the stripping agent composition of the present invention may also contain additives such as surfactants, thickeners, oxidizing agents, reducing agents, waxes, amine compounds, fragrances, colorants, dyes, and solvents other than those mentioned above.

[0018] Examples of solvents other than those mentioned above include aliphatic alcohols such as n-hexanol, cyclohexanol, 2-ethylhexanol, 1-methylcyclohexanol, 2-methylcyclohexanol, 2,6-dimethylcyclohexanol, 2,3-dimethylcyclohexanol, 1-heptanol, 1-octanol, and 2-octanol; aromatic alcohols such as phenol, benzyl alcohol, phenylethyl alcohol, and furfuryl alcohol; polyhydric alcohols such as ethylene glycol, diethylene glycol, and propylene glycol; ethylene glycol mono-n-butyl ether, ethylene glycol mono-tert-butyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, and diethylene glycol monobutyl ether. Aliphatic ether solvents such as 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, and triethylene glycol dimethyl ether, ethyl phenyl ether, 2-methyl anisole, 3-methyl anisole, 4-methyl anisole, 2,Aromatic ether solvents such as 5-dimethylanisole, 2-ethylanisole, 4-ethylanisole, n-butylphenyl ether, t-butylanisole, n-pentylanisole, n-hexylanisole, n-heptylanisole, n-octylanisole, 1-methylnaphthyl ether, 2-methylnaphthyl ether, diphenyl ether, and 3-phenoxytoluene, diethylene glycol monoethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, diethylene glycol monoethyl ... Examples of the solvent include ether ester solvents such as ethylene glycol monobutyl ether acetate, ketone solvents such as cyclohexanone, isophorone, diisobutyl ketone, and 2-(1-cyclohexenyl)cyclohexanone, nitrogen-containing solvents such as N,N-dimethylformamide, N,N-diethylformamide, N,N-dimethylacetamide, acetamide, N-methylpyrrolidone, 2-pyrrolidone, 1-3-dimethyl-2-imidazolidinone, and hexamethylphosphoric acid triamide, and sulfur-containing solvents such as dimethyl sulfoxide, sulfolane, and thiodiglycol. One or more of these solvents may be used. In the present invention, it is particularly preferable to use one or more solvents selected from the group consisting of nitrogen-containing solvents and aromatic alcohols.

[0019] Examples of the thickener include clay minerals such as sepiolite, palygorskite, bentonite, montmorillonite, hectorite, beidellite, saponite, nontronite, volkonskoite, sauconite, stevensite, fluorohectorite, laponite, rectonite, vermiculite, illite, makatite, kanemite, irielite, magadiite, and kenyaite, and one or more of these can be used. Examples of thickeners other than clay minerals include swelling silica, cellulose-based thickeners, and polyacrylic acid-based thickeners. In the present invention, it is particularly preferable that the coating contains sepiolite and / or palygorskite, which can easily soften the old coating film and maintain the peelable state for a long period of time. Note that palygorskite is also called attapulgite, and in the present invention, palygorskite and attapulgite are treated as the same meaning. The content of the thickener is not particularly limited as long as it does not impair the effects of the present invention, but it is preferable that the total amount of the thickener is 0.1% by weight or more and 15% by weight or less, and more preferably 0.5% by weight or more and 10% by weight or less, based on the total amount of the composition.

[0020] The surfactant that can be used is not particularly limited and may be a nonionic surfactant, an anionic surfactant, a cationic surfactant, an amphoteric surfactant, or the like.

[0021] Examples of the oxidizing agent include formic acid, acetic acid, butyric acid, acrylic acid, linoleic acid, oleic acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, sebacic acid, phthalic acid, maleic acid, fumaric acid, benzoic acid, salicylic acid, cinnamic acid, lactic acid, 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, perchlorate, and perborate.

[0022] Examples of the reducing agent include sodium hydroxide, sodium polyphosphate, sodium carbonate, potassium hydroxide, lithium hydroxide, and calcium hydroxide. Examples of the amine compound include monomethylamine, monoethylamine, isopropylamine, monobutylamine, cyclohexylamine, monoethanolamine, diethanolamine, triethanolamine, and isopropanolamine.

[0023] Examples of waxes include polyethylene wax and its derivatives, montan wax and its derivatives, microcrystalline wax and its derivatives, petrolatum, carnauba wax, candelilla wax, rice wax, Japan wax, lanolin, beeswax, Fischer-Tropsch wax, etc., and one or more types can be used.

[0024] The stripping composition of the present invention is used to strip coating films (old coating films) formed on the surfaces of buildings, civil engineering structures, etc., and there are no particular limitations on the old coating films to which it can be applied. Examples of old coating films include JIS K5621 "General-purpose rust-preventive paint", JIS K5651 "Amino alkyd resin coating", JIS K5658 "Weather-resistant topcoat coating for architecture", JIS K5659 "Weather-resistant coating for steel structures", JIS K5660 "Glossy synthetic resin emulsion paint", JIS K5663 "Synthetic resin emulsion paint", JIS K5668 "Synthetic resin emulsion pattern coating", JIS K5670 "Acrylic resin-based non-aqueous dispersion coating", JIS A6909 "Architectural finishing coating material", and the like.

[0025] The stripping composition of the present invention is applied to such old paint films at a rate of preferably 0.2 kg / m 2 More than 5.0kg / m 2 Less than or equal to 0.3 kg / m 2 More than 3.0kg / m 2 The coating tool is not particularly limited, and for example, a roller, a brush, a trowel, a spatula, a spray, a gun, or the like may be used for coating.

[0026] In addition, the stripping agent composition of the present invention exhibits excellent stripping effect about 30 minutes to 3 hours after application, and the stripping effect continues even after 24 to 48 hours. Therefore, stripping can be performed according to the timing of the applicator. There is no particular limitation on the stripping tool, and for example, a trowel, spatula, scraper, etc. may be used for stripping. EXAMPLES

[0027] The following examples will clarify the features of the present invention.

[0028] The following raw materials were uniformly mixed in the weight ratios shown in Table 1 to prepare stripping agent compositions 1 to 23. Dibasic acid ester 1: Dimethyl phthalate Dibasic acid ester 2: Dimethyl glutarate Dibasic acid ester 3: Dimethyl succinate Dibasic acid ester 4: Dimethyl adipate Fatty acid monoester 1: Methyl octadecanoate Fatty acid monoester 2: Octadecyl octadecanoate Fatty acid monoester 3: Methyl oleate Fatty acid monoester 4: Methyl linoleate Aliphatic hydrocarbon compounds 1: Paraffin Aromatic hydrocarbon compounds 1: Solvesso 100 Aromatic hydrocarbon compounds 1: Xylene Solvent 1: N-methylpyrrolidone Solvent 2: Benzyl alcohol ·Thickener 1: Sepiolite ·Thickener 2: Palygorskite ·Thickener 3: Bentonite

[0029] (test) In an environment of 23°C temperature and 50% relative humidity and an environment of 5°C temperature, the old coating surface shown below was placed vertically, and the peeling composition shown in Table 1 was applied with a roller in the required amount shown below, and the following tests were carried out. Old coating film 1: One side of a slate board (300 x 300 x 6 mm) was sprayed with acrylic resin enamel, the main components of which were acrylic resin and titanium oxide, to form a coating film with a thickness of 0.2 mm. This was exposed for 400 hours in an accelerated weather resistance tester "Eye Super UV Tester" (manufactured by Iwasaki Electric Co., Ltd.) to obtain the old coating film. Required amount of stripping composition: 0.5 kg / m 2 . Old coating film 2: A coating film of 0.2 mm thickness was formed by spraying an acrylic silicone resin paint mainly composed of acrylic silicone resin and titanium oxide onto one side of a slate board (300 x 300 x 6 mm), and this was exposed for 400 hours in an accelerated weather resistance tester "Eye Super UV Tester" (manufactured by Iwasaki Electric Co., Ltd.) to obtain the old coating film. Required amount of peeling composition: 0.5 kg / m 2 .

[0030] (Test 1) Rapid peeling effect Three hours after application, the coating was peeled off using a spatula, and the degree of peeling was evaluated on a five-point scale from "5" (peelable smoothly without any problems, showing excellent peeling effect) to "1" (peel was difficult, showing poor peeling effect). The results are shown in Table 1.

[0031] (Test 2) Durability of peeling effect 48 hours after application, the coating was peeled off using a spatula, and the degree of peeling was evaluated. The evaluation was the same as in Test 1. The results are shown in Table 1.

[0032] [Table 1]

Claims

1. A stripping composition comprising a dibasic acid ester, Further, the composition contains a fatty acid monoester and an aliphatic hydrocarbon compound and / or an aromatic hydrocarbon compound, The fatty acid monoester includes a saturated fatty acid monoester and an unsaturated fatty acid monoester. A stripping agent composition comprising:

2. 2. The stripping composition according to claim 1, wherein a mixing ratio (weight ratio) of the dibasic acid ester to the fatty acid monoester is from 20:80 to 80:20.