JP2021054936A - Release agent composition - Google Patents

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

The present invention relates to a release agent composition having an excellent quick-acting and long-lasting release effect.

As a method of repainting the paint film (old paint film) formed on the surface of buildings, civil engineering structures, etc., a method of applying a new paint on the old paint film, or a method of peeling off the old paint film and applying a new paint Examples include a method of painting. In many cases, the old paint film is repainted with a new paint in terms of cost and shortening of the construction period. Currently, buildings and civil engineering structures that have been painted two or three times or more on the old paint film are used. There are many.

However, if the new paint is applied many times on the old paint film that has already deteriorated, the paint film itself becomes heavy and may give a load to the base material. In addition, the thickness of the coating film itself may become too thick, which may press the space. Furthermore, in recent years, high-performance coating films have appeared, and it may be difficult to apply a new coating film on the coating film itself.

Due to such a problem, recently, there are many methods for temporarily peeling off the old coating film.
Examples of the method for peeling off the old coating film include physical methods such as sanding treatment, blasting treatment, high-pressure water injection, and chisel chipping, and chemical methods using chemicals and solvents. From the viewpoint of problems such as the above and environmental consideration, a release agent using a dibasic acid ester solvent has come to be used. (For example, Patent Document 1 etc.)

Japanese Unexamined Patent Publication No. 2012-166143

However, in Patent Document 1, it may take some time from application to peeling. Further, the peelable duration may be short, and it is an issue to develop a peeling agent which can be peeled faster and has a long peelable duration.

The present invention has been made in view of such a problem, and the release agent composition containing a dibasic acid ester contains a fatty acid monoester and an aliphatic hydrocarbon compound and / or an aromatic hydrocarbon compound. As a result, they have found that they have an excellent quick-acting effect that enables faster peeling after application and that they can maintain a peelable state for a long time, and have completed the present invention.

That is, the present invention has the following features.
1. 1. A stripping agent composition containing a dibasic acid ester.
A release agent composition further comprising a fatty acid monoester and an aliphatic hydrocarbon compound and / or an aromatic hydrocarbon compound.
2. 1. The mixing ratio (weight ratio) of the dibasic acid ester and the fatty acid monoester is from 20:80 to 80:20. The release agent composition according to.

The release agent composition of the present invention is excellent in quick-acting to quickly release the peelable state and to maintain the peelable state for a long time.

Hereinafter, modes for carrying out the present invention will be described.

The release agent composition of the present invention is characterized by containing a dibasic acid ester, a fatty acid monoester, an aliphatic hydrocarbon compound and / or an aromatic hydrocarbon compound.
In the present invention, the dibasic acid ester and the fatty acid monoester are easily compatible with each other, and by mixing the dibasic acid ester and the fatty acid monoester, it is easy to penetrate into the old coating film, and the dibasic acid ester is peeled off. It has been found that the effect can be exerted quickly (fast-acting), the fatty acid monoester is hard to volatilize, and the peeling effect of the dibasic acid ester can be sustained for a long time (sustainability).
Further, in the present invention, it has been found that the above-mentioned rapid effect and sustainability can be enhanced by containing an aliphatic hydrocarbon compound and / or an aromatic hydrocarbon compound. That is, the aliphatic hydrocarbon compound and / or the aromatic hydrocarbon compound easily permeates into the old coating film and easily softens the coating film, so that the peeling agent having an excellent peeling effect (quick-acting and long-lasting) is excellent. The composition can be obtained. In particular, when an aliphatic hydrocarbon compound is contained, the sustainability of the peeling effect can be improved, and when an aromatic hydrocarbon compound is contained, the rapid effect of the peeling effect can be improved.
Further, in the present invention, the peeling effect is excellent in quick effect and durability not only at room temperature of 10 ° C. or higher but also at low temperature of lower than 10 ° C.

Examples of the dibasic acid ester include an ester compound of a dicarboxylic acid having an alkyl segment having 2 or more and 12 or less carbon atoms and an alkyl alcohol having 1 or more and 12 or less 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, glutaru Diisobutyl acid, diisobutyl adipate, diisobutyl phthalate, diisobutyl maleate, dibutyl succinate, dibutyl glutarate, 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. One or two or more of them can be used. In the present invention, it is particularly preferable to contain one or more selected from dimethyl glutarate and dimethyl adipate.
The content of the dibasic acid ester is preferably 15% by weight or more and 70% by weight or less, more preferably 25% by weight or more and 65% by weight or less, based on the total amount of the composition. The dibasic acid ester is a component that mainly imparts a peeling effect, and an excellent peeling effect can be exhibited when the content is as described above.

Examples of the fatty acid monoester include SL compounds of fatty acids and alkyl alcohols, and in particular, fatty acids having 6 to 24 carbon atoms (preferably 8 to 20 carbon atoms) and 1 to 24 carbon atoms (preferably). An ester compound or the like with an alkyl alcohol having 1 to 12 carbon atoms can be preferably used.
Specifically, methyl hexaneate, ethyl hexaneate, butyl hexaneate, hexyl hexane, heptyl hexane, octyl hexate, methyl heptanate, ethyl heptate, propyl heptanate, butyl heptanate, hexyl heptanate, heptane. Octyl oxyate, methyl octanoate, ethyl octanoate, propyl octanoate, butyl octanoate, pentyl octanoate, hexyl octanoate, heptyl octatenate, octyl octylate, methyl nonanoate, ethyl nonanoate, propyl nonanoate, butyl nonanoate , Pentyl nonanoate, heptyl nonanoate, methyl decanoate, ethyl decanoate, propyl decanoate, butyl decanoate, hexyl decanoate, heptyl decanoate, methyl dodecaneate, ethyl dodecanoate, propyl dodecaneate, butyl dodecane, dodecane Hexyl acid, heptyl dodecanoate, octyl dodecanoate, methyl tetradecanoate, ethyl tetradecanoate, propyl tetradecanoate, butyl tetradecanoate, tetradecyl tetradecanoate, methyl hexadecanoate, ethyl hexadecate, propyl hexadecanoate, butyl hexadecanoate, 2 hexadecanoic acid -Saturated fatty acid monoesters such as ethylhexyl, methyl octadecanoate, ethyl octadecanoate, propyl octadecanoate, butyl octadecanoate, 2-ethylhexyl octadecanoate, octadecyl octadecanoate, methyl eicosate, ethyl eicosate, etc.
Methyl palmitreate, ethyl palmitreate, methyl oleate, ethyl oleate, propyl oleate, butyl oleate, pentyl oleate, heptyl oleate, -2-ethylhexyl oleate, methyl elenitate, ethyl elenitate, propyl elenitate , Butyl elenitate, pentyl elenitate, -2-ethylhexyl elenitate, methyl linoleic acid, ethyl linoleate, propyl linoleate, isopropyl linoleate, butyl linoleate, pentyl linoleate, hexyl linoleic acid, heptyl linoleic acid -2-ethylhexyl, methyl linolenate, ethyl linolenate, propyl linolenate, butyl linolenate, pentyl linolenate, hexyl linoleate, heptyl linolenate, -2-ethylhexyl linoleate, methyl arachidate, ethyl arachidate, arachidonic acid Butyl, -2-ethylhexyl arachidate, methyl eicosenoate, ethyl eicosenoate, butyl eicosenoate, heptyl eicosenoate, -2-ethylhexyl eicosenoate, methyl eikosapentaene, ethyl eikosapentaene, butyl eikosapentaenoate, eikosapentaenoic acid -2-Ethylhexyl, Methyl erucate, Ethyl erucate, butyl erkaate, -2-ethylhexyl ellate, methyl docosahexaene, ethyl docosahexaene, butyl docosahexaene, -2-ethylhexyl docosahexaene, methyl linoleate, ethyl linoleate , Unsaturated fatty acid monoesters such as butyl linoleate, heptyl linoleate, -2-ethylhexyl linoleic acid,
Alternatively, palm oil fatty acid, palm oil fatty acid, rapeseed oil fatty acid, soybean oil fatty acid, hydrogenated soybean oil fatty acid, flaxseed 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 oil fatty acid, pistachio oil fatty acid, almond oil fatty acid, olive oil fatty acid, macadamia nut oil fatty acid, avocado Oil fatty acids, sea buckthorn oil fatty acids, sesame oil fatty acids, cannabis oil fatty acids, hazelnut oil fatty acids, cherry oil fatty acids, wild rose oil fatty acids, Benibana oil fatty acids, walnut oil fatty acids and other monoesters, biodiesel, etc. One kind or two or more kinds can be used.
In the present invention, it is particularly preferable to contain an unsaturated fatty acid monoester, and 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 a mixing ratio (weight ratio) of the dibasic acid ester and the fatty acid monoester, and is preferably 20:80 to 80:20, more preferably 30:70 to 70:30.
With such a mixing ratio, it is possible to obtain a release agent composition having excellent quick-acting and long-lasting release effect.

Examples of the aliphatic hydrocarbon compound include pentane, hexane, heptane, octane, nonane, decane, dodecane, tetradecane, pentadecane, hexadecane, octadecane, nonadecan, paraffin, cyclopentane, cyclohexane, cycloheptan, cyclooctane, and methylcyclopentane. , Ethylcyclopentane, methylcyclohexane, ethylcyclohexane, propylcyclohexane, butylcyclohexane, pentylcyclohexane, hexylcyclohexane, dimethylcyclohexane, diethylcyclohexane, dibutylcyclohexane and the like, and one or more of these can be used. ..
When the 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, more preferably 2% by weight or more and 15% by weight or less, based on the total amount of the composition. By including the aliphatic hydrocarbon compound, the sustainability of the peeling effect can be improved in particular.

Examples of the aromatic hydrocarbon compound include benzene, toluene, xylene, ethylbenzene, diethylbenzene, trimethylbenzene, triethylbenzene, propylbenzene, butylbenzene, pentylbenzene, hexylbenzene, octylbenzene, biphenyl, terphenyl, and diphenylethane. Methylphenyl) phenylethane, dimethylbiphenyl, benzyltoene, naphthalene, methylnaphthalene, ethylnaphthalene, butylnaphthalene, etc., or Swazole 1000, Swazole 1500 (manufactured by Maruzen Petrochemical Co., Ltd.), Solbesso 100, Solbesso 150 (manufactured by Exxon Mobile). One or more selected from industrial aromatic hydrocarbon solvents and the like can be used.
When the 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 including the aromatic hydrocarbon compound, the rapid effect of the peeling effect can be improved.

As the aliphatic hydrocarbon compound and the aromatic hydrocarbon compound, the aliphatic hydrocarbon compound or the aromatic hydrocarbon compound can be appropriately selected and used depending on the application requiring quick-acting and long-lasting peeling effect. In the present invention, it is preferable to use an aliphatic hydrocarbon compound and an aromatic hydrocarbon compound, and for applications requiring more durability, more aliphatic hydrocarbon compounds are used, and for applications requiring faster effect. Therefore, it is preferable to use a larger amount of aromatic hydrocarbon compound.

In addition to the above components, the release agent composition of the present invention includes, for example, additives such as surfactants, thickeners, oxidizing agents, reducing agents, waxes, amine compounds, fragrances, colorants, dyes, and the above. A solvent other than the above can also be used.

Solvents other than the above include, for example, n-hexanol, cyclohexanol, 2-ethylhexanol, 1-methylcyclohexanol, 2-methylcyclohexanol, 2,6-dimethylcyclohexanol, 2,3-dimethylcyclohexanol, 1 -Adioxy alcohols such as 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 monotert-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, etc. Aliphatic ether solvent, ethyl phenyl ether, 2-methyl anisole, 3-methyl anisole, 4-methyl anisole, 2,5-dimethyl anisole, 2-ethyl anisole, 4-ethyl anisole, n-butyl phenyl ether, t-butyl Aromatic ether solvents such as anisole, n-pentylanisole, n-hexylanisole, n-heptylanisole, n-octylanisole, 1-methylnaphthyl ether, 2-methylnaphthyl ether, diphenyl ether, 3-phenoxytoluene, diethylene glycol monoethyl Ether ester solvents such as ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, cyclohexanone, Ketone solvents such as isophorone, diisobutylketone, 2- (1-cyclohexenyl) cyclohexanone, N, N-dimethylformamide, N, N-diethylformamide, N, N-dimethylacetamide, acetamide, N-methylpyrrolidone, 2-pyrrolidone. , 1-3-Dimethyl-2-imidazolidinone, hexamethylphosphate triamide and other nitrogen-containing solvents, dimethyl sulfoxide, sulfolane, thiodiglycol and other sulfur-containing solvents, and one or two of these. The above can be used.
In the present invention, in particular, one or more selected from nitrogen-containing solvents and aromatic alcohols can be preferably used.

Thickeners include, for example, sepiolite, parigolskite, bentonite, montmorillonite, hectorite, biderite, saponite, nontronite, volcon scoreite, saponite, stephensite, fluorohectorite, laponite, lectite, vermiculite, illite, macatite. , Clay minerals such as canemite, illite, magadiate, and kenonyite, and one or more of these can be used. Further, as the thickener other than the clay mineral, for example, swellable silica, a cellulosic thickener, a polyacrylic acid thickener and the like can be used.
In the present invention, it is particularly preferable to contain sepiolite and / or parigolite, the old coating film is easily softened, and the peelable state can be maintained for a long time. The parigolskite is also referred to as an attapargit, and in the present invention, the parigolskite and the atapargite are treated synonymously.
The content of the thickener is not particularly limited as long as the effect of the present invention is not impaired, but the total amount thereof is 0.1% by weight or more and 15% by weight or less, and further 0.5% by weight or more based on the total amount of the composition. It is preferably 10% by weight or less.

As the surfactant, a nonionic surfactant, an anionic surfactant, a cationic surfactant, an amphoteric surfactant and the like can be used without particular limitation.

Examples of oxidizing agents 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 and benzoic acid. Acids, salicylic acid, silicic acid, lactic acid, malic acid, citric acid, tartaric acid, ascorbic acid, aspartic acid, aminobenzoic acid, alginic acid, glycolic acid, gluconic acid, glutamate, toluenesulfonic acid, nicotinic acid, uric acid, halogen-substituted acetic acid , Benzenesulfonic acid, hydrogen peroxide, perchlorate, perborate and the like.

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

Examples of the wax include polyethylene wax and its derivatives, montan wax and its derivatives, microcrystalline wax and its derivatives, petrolatum, carnauba wax, candelilla wax, rice wax, wood wax, lanolin, mitsuro, fisher tropsh wax and the like. It can be mentioned and one or more can be used.

The release agent composition of the present invention removes a coating film (old coating film) formed on the surface of a building, a civil engineering structure, or the like, and the applicable old coating film is not particularly limited.
Examples of the old coating materials include JIS K5621 "general rust preventive paint", JIS K5651 "aminoalkide resin paint", JIS K5658 "weather resistant topcoat paint for construction", JIS K5659 "weather resistant paint for steel structures", and the like. JIS K5660 "Glossy Synthetic Resin Emulsion Paint", JIS K5663 "Synthetic Resin Emulsion Paint", JIS K5668 "Synthetic Resin Emulsion Pattern Paint", JIS K5670 "Acrylic Resin Non-Aqueous Dispersive Paint", JIS A6909 "Building Finishing Paint""Material" and the like.

The release agent composition of the present invention, on such old coating, preferably 0.2 kg / ^{m 2} or more 5.0 kg / ^{m 2} or less, more preferably 0.3 kg / ^{m 2} or more 3.0 kg / It may be applied with ^{m 2 or less.} The painting tool is not particularly limited, and for example, painting may be performed using a roller, a brush, a spatula, a spatula, a spray, a gun, or the like.

Further, the release agent composition of the present invention exhibits an excellent peeling effect about 30 minutes to 3 hours after application, and further, the peeling effect is maintained even after 24 hours to 48 hours have passed. Therefore, it can be peeled off at the timing of the installer. The peeling device is not particularly limited, and for example, it may be peeled off using a trowel, a spatula, a scraper, or the like.

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

The release agent compositions 1 to 23 in which the following raw materials were uniformly mixed at the weight ratio shown in Table 1 were prepared.
・ 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 compound 1: Paraffin / aromatic hydrocarbon compound 1: Solbesso 100
-Aromatic hydrocarbon compound 1: xylene-solvent 1: N-methylpyrrolidone-solvent 2: benzyl alcohol-thickening agent 1: sepiolite-thickening agent 2: parigolskite-thickening agent 3: bentonite

(test)
In an environment of a temperature of 23 ° C. and a relative humidity of 50% and an environment of a temperature of 5 ° C., the old coating film surfaces shown below are placed vertically, and the peeling composition shown in Table 1 is required to be shown below. Roller coating was performed in an amount and the following test was carried out.
Old coating film 1: Acrylic resin enamel containing acrylic resin and titanium oxide as the main components is sprayed on one side of a slate plate (300 x 300 x 6 mm) to form a coating film with a coating film thickness of 0.2 mm. The old coating film was exposed to the accelerated weather resistance tester "Eye Super UV Tester" (manufactured by Iwasaki Electric Co., Ltd.) for 400 hours. Peeling composition required 0.5 kg / m ² .
Old coating film 2: Acrylic silicone resin and acrylic silicone resin paint containing titanium oxide as the main components are sprayed on one side of a slate plate (300 x 300 x 6 mm) to form a coating film with a coating thickness of 0.2 mm. This was exposed to the accelerated weather resistance tester "Eye Super UV Tester" (manufactured by Iwasaki Electric Co., Ltd.) for 400 hours, and the old coating film was used. Peeling composition required 0.5 kg / m ² .

(Test 1) Fast-acting peeling effect Three hours after application, the coating film was peeled off using a spatula, and the degree was set to "5" (the peeling effect was excellent without any problem). The evaluation was made on a scale of "1" (difficult to peel and inferior in peeling effect). The results are shown in Table 1.

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

Claims (2)

A stripping agent composition containing a dibasic acid ester.
A release agent composition further comprising a fatty acid monoester and an aliphatic hydrocarbon compound and / or an aromatic hydrocarbon compound. The release agent composition according to claim 1, wherein the mixing ratio (weight ratio) of the dibasic acid ester and the fatty acid monoester is 20:80 to 80:20.