JP2019218426A - Coating composition and application thereof - Google Patents

Abstract

To provide a composition which adheres to a surface with a foam form by discharging to a surface to be cleaned, then is solidified to be a solid body, adheres to the surface with good followability, coats the surface and adheres to the same, and further can peel the solid body from the surface after use.SOLUTION: There is provided a composition which contains one or more kind of solvent selected from an acrylic resin, ethyl acetate, n-propyl acetate, isopropyl acetate, n-butyl acetate, and isobutyl acetate, a nonionic surfactant, volatile silicone, non-volatile silicone oil and a propellant, adheres to a surface with a foam form by discharging to any surface, then is solidified to be a solid body, adheres to the surface transiently to be coated and in which the solid body is peeled from the surface.SELECTED DRAWING: None

Description

  The present specification relates to coating compositions used to coat surfaces and uses thereof.

  Conventionally, in order to remove and clean dusts of various forms and sizes such as granules, fibers, irregular shapes, etc., which are present in concave portions or gaps of fine uneven surfaces, for example, suction with a vacuum cleaner or the like, impregnation with a detergent. In many cases, a method of wiping with a cleaned cleaning sheet, adsorption by a nonwoven fabric sheet with an adsorption fiber (Patent Document 1), scraping or adsorption by a holding body of an adsorbed long fiber (Patent Document 2), or the like is often used.

JP-A-2005-92954 JP 2007-236690 A

  However, suction by a vacuum cleaner requires trouble such as carrying the vacuum cleaner, and depending on the shape of the tip for suction, there has been a problem of followability to a concave portion or the like. In addition, even in the case of wiping with a cleaning sheet, the ability to follow a concave portion or the like still poses a problem. Further, in the case of the holding body of the adsorbed long fiber, although there is a followability to a concave portion or the like, there is a problem that it is insufficient to secure heavy dust, fine dust, and the like.

  Until now, there has not been provided a cleaning means which has a follow-up property with respect to a concave portion or a gap of a concave-convex surface and can reliably remove an object to be removed irrespective of its form or weight.

  Also, there is no effective means for temporarily covering the surface of an object having an arbitrary three-dimensional shape such as an uneven surface.

  In view of such a conventional problem, the present specification provides a means for temporarily covering a surface with good followability to an arbitrary surface. In addition, the present specification provides a means capable of effectively removing an object to be removed which has good followability to the surface to be cleaned and which is difficult to secure by the adsorption fiber.

  The present inventors applied a study on the means of coating the aerosol composition, and found that it was discharged and formed into a foam, adhered to the surface, and then solidified to form a solid, with good conformability to the surface. It has been found that it can be configured so that the solidified body can be easily peeled off from the surface after use, and further examined for application to cleaning means. It was found that the body could capture and solidify the object on the surface to be cleaned and remove it with the object to be removed from the surface to be cleaned. The present specification provides the following means based on such findings.

(1) acrylic resin,
One or more solvents selected from ethyl acetate, n-propyl acetate, isopropyl acetate, n-butyl acetate and isobutyl acetate;
A nonionic surfactant;
Volatile silicone,
A propellant,
Containing
It is configured such that it is sprayed on any surface and adheres as a foam, and then solidifies to form a solidified body and adheres so that the surface can be temporarily covered so that the solidified body is peeled off from the surface. The composition.
(2) The composition according to (1), further comprising a non-volatile silicone oil.
(3) The composition according to (1) or (2), which is a composition for surface protection.
(4) The composition according to any one of (1) to (3), which is a cleaning composition.
(5) The composition according to (4), wherein the composition holds an object to be cleaned on the solidified body and cleans the surface by peeling the solidified body.
(6) The acrylic resin is one or more selected from the group consisting of ethyl acetate, n-butyl acetate, isobutyl acetate, n-butyl cellosolve, toluene, xylene, acetone, methyl ethyl ketone and methyl isobutyl ketone. The composition according to any one of (1) to (5), which is dissolved in a solvent at a concentration of 20%.
(7) The composition according to any one of (1) to (6), wherein the acrylic resin has a weight average molecular weight of 50,000 to 200,000.
(8) The composition according to any one of (1) to (7), wherein the acrylic resin has a glass transition temperature of 10 ° C or more and 60 ° C or less.
(9) The composition according to any one of (1) to (8), wherein the solvent contains at least ethyl acetate.
(10) The nonionic surfactant is one or more selected from the group consisting of polyoxyethylene alkyl ethers, polyoxyethylene fatty acid esters, sorbitan fatty acid esters, and phosphoric acid fatty acid esters. ) The composition according to any one of (1) to (9).
(11) The composition according to any one of (1) to (10), wherein the volatile silicone oil is one or more selected from a cyclic silicone and a branched silicone oil.
(12) The composition according to any one of (1) to (11), further comprising an aliphatic alcohol having 12 or more carbon atoms.
(13) The composition according to (12), wherein the aliphatic alcohol is a solid alcohol at normal temperature.
(14) A method for protecting a surface,
Supplying a composition for temporarily covering the surface of the solid object and the object to be coated, which is attached to the object to be coated in the form of a foam and then solidified, and then solidifies the foam;
A method comprising:
(15) The method according to (14), further comprising a step of peeling the solidified composition from the surface.
(16) A method for removing an object,
On the surface where the object is likely to be present, a composition is provided which adheres as a foam and then solidifies to solidify and temporarily coat and adhere to the surface of the coated object, A step of solidifying the shape,
Removing the object from the surface while peeling the composition after the solidification from the surface,
A method comprising:

  The present specification relates to a composition capable of coating any surface and its use. According to the composition disclosed in the present specification (hereinafter, also referred to as the present composition), since it adheres to the surface of the object as a foam, the surface of the object, which may include an uneven surface, has good followability. To reach. In addition, since the present composition is dried and then solidified while maintaining the adhesiveness, a solidified body that adheres and adheres to the surface of the object with good followability can be easily formed. Therefore, it can be used for protection of such an object and its surface, buffering of an object and another object, suppression of vibration of the object, and packaging of the object. Further, the solidified product of the present composition is easily peeled from the surface of the object, and thus is convenient for temporary protection and the like.

  In addition, the solidified body of the present composition forms a solidified body that adheres to the surface of the object via the foam on the surface of the object and covers and adheres to the surface of the object. Objects such as fibers can be surrounded or captured by the solidified body. By peeling the solidified body of the present composition from the surface of the object, these objects can be removed or collected together with the solidified body from the surface of the object. The composition can also be used for removing or collecting objects on the surface of an object, cleaning or cleaning the surface.

  The composition adheres to the surface via a foam to form a solidified body. Therefore, it is solidified with excellent followability to the surface. Therefore, the concave portions and the convex portions can be coated with good followability, and reliable coating and adhesive protection can be achieved. In addition, such follow-up solidification is also useful for removing, collecting, and cleaning an object in a concave portion or a convex portion.

  The present composition can remove surface protection, remove an object to be removed, and the like by peeling the solidified body. That is, according to the present composition, by simply supplying the present composition to the target surface, it is possible to achieve such an object without using a special instrument, complicated work, or soiling the hands. Can be.

  Hereinafter, various embodiments of the present composition and its use will be described.

(Coating composition)
The composition can contain an acrylic resin, a solvent, a nonionic surfactant, a volatile silicone, a non-volatile silicone oil, and a propellant. By containing these components, the present composition can be configured to be sprayed onto an arbitrary surface and adhere as a foam, and then solidified to form a solid and cover the surface. Further, the solidified body of the present composition can be configured to be separated from the surface. Therefore, the present composition can be used as a composition for surface protection, a composition for cleaning, and the like, as described above.

(acrylic resin)
The acrylic resin is not particularly limited, but includes a homopolymer or a copolymer using one or more (meth) acrylic acid esters as a monomer. Here, (meth) acrylate means methacrylate or acrylate, and (meth) acrylates include methyl (meth) acrylate, ethyl (meth) acrylate, (meth) acryl Alkyl (meth) acrylates such as n-butyl acrylate, iso-butyl (meth) acrylate, t-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, cyclohexyl (meth) acrylate, (meth) ) Methylcyclohexyl acrylate, bornyl (meth) acrylate, isobornyl (meth) acrylate, cycloalkyl (meth) acrylate such as adamantyl (meth) acrylate, phenyl (meth) acrylate, benzyl (meth) acrylate (Meth) acrylic acid aromatic ester, (meth) acrylic (Meth) acrylic acid substituted aromatic esters such as fluorophenyl acrylate, chlorophenyl (meth) acrylate, fluorobenzyl (meth) acrylate, chlorobenzyl (meth) acrylate, fluoromethyl (meth) acrylate, (meth) acryl (Meth) acrylic acid halogenated alkyl ester such as fluoroethyl acrylate, (meth) acrylic acid hydroxyalkyl ester, (meth) acrylic acid glycidyl, (meth) acrylic acid ethylene glycol ester, (meth) acrylic acid polyethylene glycol ester, etc. No. For example, methyl methacrylate, methyl acrylate, and the like can be used.

  The acrylic resin may include a carboxy group-containing monomer such as (meth) acrylic acid and have an acid value. The acid value may be, for example, 1 mg KOH / g or more, for example, 2 mg KOH / g or more, for example, 2.5 mg KOH / g or more, or for example, 3 mg KOH / g or more. The acid value may also be, for example, 6 mgKOH / g or less, for example, 5 mgKOH / g or less, or for example, 4 mgKOH / g or more.

  Acrylic resins include, in addition to (meth) acrylic acid esters and (meth) acrylic acid, aromatic compounds such as styrene, α-methylstyrene, α-substituted styrene such as α-ethylstyrene, and nuclear-substituted styrene such as fluorostyrene and methylstyrene. N-substituted vinyl compounds such as aromatic vinyl compounds, acrylonitrile and methacrylonitrile, N-methylmaleimide, N-ethylmaleimide, N-propylmaleimide, N-cyclohexylmaleimide, N-phenylmaleimide and N-chlorophenylmaleimide Unsaturated dibasic acids such as maleimide, maleic acid, maleic anhydride and fumaric acid or derivatives thereof, and (meth) acrylamide, N, N-dimethyl (meth) acrylamide, and N, N-diethyl (meth) acrylamide ) Acrylamides, (meth) acryl It may include such unsaturated fatty acids and derivatives thereof such as an acid.

  Such an acrylic resin may take any form, for example, may be a bead. A method for producing an acrylic resin is well known.For example, a bead polymer is prepared by stirring a polymerization initiator and, if necessary, a chain transfer agent into a monomer composition for obtaining an acrylic resin by suspension polymerization. After dissolving the resulting homogeneous mixture in a dispersion medium (eg, aqueous medium) in which a dispersion stabilizer is present, a polymerization apparatus having an eccentricity of a stirring shaft of 5 to 20% is used. The temperature is kept at a predetermined polymerization temperature for a certain time to complete the polymerization. The obtained suspension polymer is filtered, washed with water and dried to obtain a bead polymer.

  The polymerization initiator, chain transfer agent, and dispersant used for the suspension polymerization of the acrylic resin can be appropriately selected from those known to those skilled in the art and used in an appropriate amount.

  The acrylic resin is, for example, one or more solvents selected from the group consisting of ethyl acetate, n-butyl acetate, isobutyl acetate, n-butyl cellosolve, toluene, xylene, acetone, methyl ethyl ketone and methyl isobutyl ketone. It can have a solubility of 20% by mass. The solubility was measured by weighing an acrylic resin and a solvent in a screw tube (dissolution temperature: 23 ° C.), stirring the mixture with a mix rotor at 70 rpm for 12 hours, and observing (visually) the dissolution state after completion of the stirring. If so, it was determined that it was dissolved.

  When the solvent has such solubility, the function unique to the present composition can be exhibited. Although not particularly limited, it is preferable that the compound has the solubility in the solvent used in the present composition. For example, it is preferable to have the above-mentioned solubility in at least ethyl acetate.

  The weight average molecular weight (Mw) of the acrylic resin is not particularly limited, but can be, for example, 50,000 or more and 200,000 or less. Within this range, solubility, foaming property, adhesiveness, peeling property, washing property, drying property and the like can be satisfied. Further, for example, it is 60,000 to 180,000. The weight average molecular weight can be measured by gel permeation chromatography (GPC) using polystyrene as a standard.

  The glass transition temperature (Tg) of the acrylic resin is not particularly limited, but may be, for example, 10 ° C or more and 60 ° C or less. Within this range, a solid can be effectively formed under the assumed use conditions. Tg is, for example, 20 ° C. or more and 50 ° C. or less. The Tg of the acrylic resin refers to a value calculated from the FOX equation using a value described in a polymer handbook [Polymer HandBook (J. Brandrup, Interscience, 1989)].

  The amount of the acrylic resin to be added to the total mass of the present composition other than the propellant can be appropriately determined in consideration of necessary coating properties, solidification properties, releasability, and the like. For example, the acrylic resin accounts for 20% by mass or more of the total mass of the present composition other than the propellant, and also, for example, 30% by mass or more, for example, 35% by mass or more, and for example, 40% by mass. That is all. The acrylic resin is, for example, 80% by mass or less, for example, 75% by mass or less, for example, 70% by mass or less, for example, 65% by mass or less, and for example, 60% by mass or less. % By mass or less. Typically, the acrylic resin accounts for, for example, 20% by mass or more and 60% by mass or less, and for example, 30% by mass or more and 60% by mass or less based on the total mass of the present composition other than the propellant.

(solvent)
As the solvent, one or more selected from ethyl acetate, n-propyl acetate, isopropyl acetate, n-butyl acetate and isobutyl acetate can be used from the viewpoint of solubility of the acrylic resin and the like. That is, in addition to these simple solvents, a mixed solution of two or more kinds selected from these can be used. Although not particularly limited, for example, it is preferable to include at least ethyl acetate. This is because ethyl acetate greatly contributes to the solubility of the acrylic resin, the permeability of the foam into concave portions, and the foam forming ability.

  Such acetates can be appropriately blended with respect to the total mass of the present composition excluding the propellant, but are, for example, 10 mass% or more, for example, 15 mass% or more, and for example, 20 mass% or more. It is at least 25% by mass, for example, at least 30% by mass. The amount of the acetic acid ester is 70% by mass or less, for example, 65% by mass or less, and for example, 60% by mass or less, based on the total mass of the present composition excluding the propellant. , 55% by mass or less. Typically, the acetic acid ester is, for example, 10% by mass or more and 60% by mass or less, and for example, 20% by mass or more and 60% by mass or less based on the total mass of the present composition other than the propellant. .

  Further, a hydrocarbon solvent such as isoparaffin can be appropriately used in combination with these. The hydrocarbon solvent is excellent in solubility of the acrylic resin, has good volatility, and can contribute to securing a short drying time. Considering the contribution of the acrylic resin to the solubility and the feeling of foam, an isoparaffin-based solvent having an initial boiling point of 100 ° C. or higher and an end point of 150 ° C. or lower can be preferably used. In addition, JIS K2254 or ASTM D86 can be used for such a distillation characteristic.

  Furthermore, a linear or branched alcohol having about 1 to 8 carbon atoms, such as methanol, ethanol, isopropyl alcohol, n-propyl alcohol, n-butanol, isobutanol, and sec-butanol can be used. In general, alcohol contributes significantly to the permeability and foam-forming ability of the foam. From such a viewpoint, the alcohol is preferably a linear alcohol having 1 to 4 carbon atoms, and more preferably ethyl alcohol.

  Furthermore, water can be included. This is because water greatly contributes to the permeability and foam-forming ability of the foam. Water can also contribute to the removal of waterborne dirt that cannot be removed by other components.

  Furthermore, ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone can be included. This is because these greatly contribute to the solubility of the acrylic resin and the permeability of the foam. Although not particularly limited, for example, it is preferable to use acetone.

  The compounding ratio of the solvent to the total mass of the present composition other than the propellant can be appropriately set according to the type and use of the acrylic resin and other components. It is 20% by mass or more of the mass, for example, 25% by mass or more, and for example, 30% by mass or more. The solvent is 70% by mass or less, for example, 65% by mass or less, for example, 60% by mass or less, and for example, 55% by mass, based on the total mass of the present composition excluding the propellant. % By mass, for example, 50% by mass or less, for example, 45% by mass or less, and for example, 40% by mass or less. Typically, the solvent is, for example, from 10% to 60% by mass, and for example, from 20% to 60% by mass, based on the total mass of the present composition other than the propellant.

(Nonionic surfactant)
The nonionic surfactant contributes to the permeability of the foam, the plasticity of the solidified body, the foam-forming ability, and the releasability. As the nonionic surfactant, one or more selected from the group consisting of polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester and sorbitan fatty acid ester can be used. Examples of the polyoxyethylene alkyl ether include polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, and polyoxyethylene octyl dodecyl ether. Examples of the polyoxyethylene fatty acid ester include polyethylene glycol monolaurate, polyoxyethylene monostearate, monooxyethylene distearate, and monooxyethylene monooleate. Examples of the polyoxyethylene sorbitan fatty acid ester include polyoxyethylene sorbitan monoclonal laurate, polyoxyethylene sorbitan monostearate, and polyoxyethylene sorbitan monoclonal oleate. Examples of the sorbitan fatty acid ester include sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan distearate, sorbitan tristearate, sorbitan monooleate, sorbitan trioleate and the like.

  The compounding ratio of the nonionic surfactant to the total mass of the present composition other than the propellant can be appropriately set according to the type and use of the acrylic resin and other components. It is at least 1% by mass of the total mass of the composition, for example, at least 2% by mass, and for example, at least 3% by mass. In addition, the solvent is 10% by mass or less, for example, 8% by mass or less, for example, 7% by mass or less, and for example, 6% by mass based on the total mass of the present composition excluding the propellant. % By mass or less. Typically, the nonionic surfactant is, for example, from 1% by weight to 8% by weight, and for example, from 2% by weight to 7% by weight, based on the total weight of the composition other than the propellant. It is as follows.

  Among these, for example, one or more sorbitan fatty acid esters can be used, and only one or two or more sorbitan fatty acid esters can be used as the nonionic surfactant. This is because the sorbitan fatty acid ester has a large contribution to the foam-forming ability and also has a contribution to the permeability and exfoliation of the solidified product.

  When polyoxyethylene alkyl ether is used, it is preferable to use a phosphoric acid fatty acid ester and an oil agent described below. This is because polyoxyethylene alkyl ether contributes greatly to the permeability of the foam and also contributes to the plasticity of the solidified product and the foam-forming ability. This is because they also contribute to the forming ability.

(Phosphate fatty acid ester)
Examples of the phosphoric acid fatty acid ester include tripalmitryl phosphate, trieridyl phosphate, trioleyl phosphate, trilinoleyl phosphate, trieride linoleyl phosphate, trilinolenyl phosphate, trieryl phosphate, and alkylene oxide adducts thereof. Phosphoric acid unsaturated triester. Such a phosphoric acid fatty acid ester generally functions as an oil agent, greatly contributes to the plasticity of the solidified product, and also contributes to the foam-forming ability. Phosphoric acid fatty acid esters also contribute to rust prevention.

  The compounding ratio of the phosphoric acid fatty acid ester to the total mass of the present composition other than the propellant can be appropriately set according to the type and use of the acrylic resin and other components. It is 1% by mass or more, for example, 2% by mass or more, for example, 3% by mass or more of the total mass of the product. In addition, the solvent is 10% by mass or less, for example, 8% by mass or less, for example, 7% by mass or less, and for example, 6% by mass based on the total mass of the present composition excluding the propellant. % By mass or less. Typically, the phosphate fatty acid ester is, for example, from 2% by mass to 8% by mass, and for example, from 3% by mass to 7% by mass, based on the total mass of the present composition other than the propellant. is there.

(Oil)
Examples of oils include isostearyl myristate, isocetyl myristate, isotridecyl myristate, isopropyl myristate, octyl dodecyl myristate, butyl myristate, myristyl myristate, hexyldecyl myristoylmethylaminopropionate, citronellyl methylcrotonate, and meadow foam est. Lido, meadowfoam oil fatty acid octyldodecyl, (coconut oil fatty acid / citric acid / lactic acid) glyceryl, coconut oil fatty acid decyl, hexyl laurate, cholesteryl butyrate, dihydrocholesteryl butyrate, lanolin fatty acid isopropyl, lanolin fatty acid octyldodecyl, lanolin fatty acid cholesteryl, Esters such as octyldodecyl ricinoleate, cetyl ricinoleate, isopropyl linoleate and ethyl linoleate Oil and the like. The oil agent greatly contributes to the permeability of the foam, and contributes to the plasticity of the solidified body and the foam-forming ability.

  The compounding ratio of the oil composition to the total mass of the composition other than the propellant can be appropriately set according to the type and use of the acrylic resin and other components. It is 1% by mass or more of the mass, for example, 2% by mass or more, and for example, 3% by mass or more. The amount of the solvent is 8% by mass or less, for example, 6% by mass or less, and for example, 4% by mass or less, based on the total mass of the present composition excluding the propellant. Typically, the amount of the oil agent is, for example, 2% by mass or more and 8% by mass or less, for example, 3% by mass or more and 7% by mass or less, based on the total mass of the present composition other than the propellant.

(Chain 12 or more aliphatic alcohol)
Aliphatic alcohols having 12 or more carbon atoms greatly contribute to the foam-forming ability and also contribute to the plasticity of the solidified product. Examples of the aliphatic alcohol having 12 or more carbon atoms include hexyldecanol, octyldodecanol, decyltetradecanol, oleyl alcohol, and lauryl alcohol. These are liquid at normal temperature (20 ° C., the same applies hereinafter). Examples include cetostearyl alcohol, stearyl alcohol, cetanol (cetyl alcohol), myristyl alcohol, isostearyl alcohol, and behenyl alcohol, and preferably include cetostearyl alcohol, stearyl alcohol, and cetanol (cetyl alcohol). These are solid at normal temperature.

  For example, in the present composition, an alcohol that is solid at normal temperature such as cetanol can be used. Such alcohols greatly contribute to the foam-forming ability and also contribute to the plasticity of the solidified product.

  The mixing ratio of the aliphatic alcohol to the total mass of the present composition other than the propellant can be appropriately set according to the type and use of the acrylic resin and other components, for example, the present composition other than the propellant Is 0.2% by mass or more, for example, 0.5% by mass or more, and for example, 1% by mass or more. Further, the amount of the solvent is 4% by mass or less, for example, 3% by mass or less, for example, 2% by mass or less based on the total mass of the present composition excluding the propellant. Typically, the aliphatic alcohol is, for example, 0.5% by mass or more and 4% by mass or less, and for example, 0.5% by mass or more and 3% by mass with respect to the total mass of the present composition other than the propellant. % Or less, for example, 0.5% by mass or more and 2% by mass or less.

(Volatile silicone)
The composition can include a volatile silicone. Volatile silicone greatly contributes to the exfoliation of the solidified body, and also contributes to the plasticity, permeability and peelability of the solidified body. Examples of the volatile silicone include a cyclic silicone such as cyclopentasiloxane and a branched silicone oil such as methylmethicone.

  The compounding ratio of the volatile silicone to the total mass of the present composition other than the propellant can be appropriately set according to the type and use of the acrylic resin and other components. Is 0.2% by mass or more, for example, 0.5% by mass or more, and for example, 1% by mass or more. The volatile silicone is 4% by mass or less, for example, 3% by mass or less, for example, 2% by mass or less, based on the total mass of the present composition excluding the propellant. Typically, the volatile silicone is, for example, 0.5% by mass or more and 4% by mass or less, for example, 0.5% by mass or more and 3% by mass or more based on the total mass of the present composition other than the propellant. % Or less, for example, 0.5% by mass or more and 2% by mass or less.

(Nonvolatile silicone oil)
The composition can include a non-volatile silicone oil. The non-volatile silicone oil contributes greatly to the peeling of the solidified body and also contributes to the plasticity of the solidified body. Examples of the non-volatile silicone oil include dimethicone (dimethylpolysiloxane).

  The compounding ratio of the non-volatile silicone oil to the total mass of the present composition other than the propellant can be appropriately set according to the type and use of the acrylic resin and other components. It is 0.5% by mass or more of the total mass of the product, for example, 1% by mass or more, and for example, 1.5% by mass or more. The amount of the non-volatile silicone oil is 5% by mass or less, for example, 4% by mass or less, for example, 3% by mass or less, based on the total mass of the present composition excluding the propellant. Typically, the non-volatile silicone oil is, for example, from 1% by mass to 5% by mass, and for example, from 1.5% by mass to 4% by mass, based on the total mass of the present composition other than the propellant. Or less, for example, 2% by mass or more and 4% by mass or less.

(Propellant)
The propellant is not particularly limited, but a known alternative CFC or a new CFC alternative can be used in addition to dimethyl ether and LPG. Dimethyl ether and LPG greatly contribute to the solubility and drying properties of the acrylic resin, and also contribute to the foam-forming ability. In order to obtain a suitable drying property, it is preferable to contain not only dimethyl ether but also LPG. Dimethyl ether and LPG can be used by appropriately changing the mixing ratio. For example, dimethyl ether: LPG can be used in a ratio of 30:70 to 70:30 (mass ratio, the same applies hereinafter). Further, for example, dimethyl ether: LPG can be set to 40:60 to 60:40. In such a range, it greatly contributes to the drying property and also makes a good contribution to the solubility and foam-forming ability of the acrylic resin.

  As the propellant, nitrogen or carbon dioxide which is an inorganic gas can be used. For fine adjustment of the injection state, it may be pressurized and filled with nitrogen gas, carbon dioxide gas, compressed air, argon, helium, oxygen, nitrous oxide or the like.

  The mixing ratio of the propellant and the composition (liquid) other than the propellant (liquid: propellant, but by volume) is, for example, 10:90 to 90:10, and for example, 20:80 to 80. : 20, for example, 30:70 to 70:30, and for example, 40:60 to 60:40.

  The composition contains, for example, an acrylic resin, a solvent, a nonionic surfactant, a volatile silicone, an aliphatic alcohol having 12 or more carbon atoms and a propellant, and further, for example, further includes a nonvolatile silicone oil, an oil agent and Contains one or more selected from fatty acid phosphates.

  The mixing of various components in the present composition can be appropriately set by those skilled in the art based on the foam-forming ability, permeability, adhesiveness, coating property, peeling property, and the like intended by the composition.

  As described above, the present composition is advantageous for surface protection, vibration suppression, buffering, packaging, removal, recovery, cleaning, cleaning, and the like of an object. Therefore, the present composition can be used as a surface protective agent, a vibration suppressant, a buffer, a packaging agent, an object removing agent, an object collecting agent, a detergent, and a cleaning agent.

  Of the present composition, a composition containing all components other than the propellant can be prepared as a stock solution composition for aerosol.

(Surface protection method)
The present composition can be used, for example, as follows to cover and protect the surface of the object to be coated. That is, a step of supplying the composition to be coated, which temporarily adheres to the object to be coated as a foam and then solidifies to solidify the surface of the object to be coated and the surface of the object to be coated, to solidify the foam, Be prepared to have. By doing so, the surface of the object to be coated can be protected. In addition, with such protection, it can be implemented as a buffering method, a vibration suppressing method, and a packaging method.

  The present protection method may further include a step of peeling the solidified present composition from the surface. By doing so, the solidified body can be easily separated from the surface, and the surface protection can be easily eliminated. Further, the present protection method can protect such a surface by covering the concave portion and the convex portion with good followability.

(How to remove objects)
The present composition can be used, for example, as follows to remove an object to be removed from a surface where the object may be present. That is, on the surface where the object to be removed may be present, the present composition for temporarily covering the surface of the solidified body and the surface of the object to be coated, which is adhered as a foam and then solidified, is supplied, The method includes a step of solidifying a foam, and a step of peeling the solidified composition from the surface and removing the object from the surface.

  As described above, the present composition is applied to the surface of an object via a foam on the surface of the object to form a solidified body that covers the surface, so that the strips, particles, and fibers present on the surface of the object And the like can be surrounded or captured by the solidified body. In addition, these objects to be removed can be removed or collected by separating the solidified body from the surface of the object. The present method can also be implemented as a method of removing or collecting an object to be removed on the surface of an object, or a method of cleaning or cleaning the surface.

  In addition, the present removing method can cover the concave portions and the convex portions with good followability and also remove the object on such a surface. Therefore, it is suitable for cleaning and cleaning of recesses such as sash frames (grooves) in dwellings, recesses of various pockets in vehicles, trims, floors, furniture, remote controllers such as televisions, keyboards, and the like. Further, it can be suitably used as a cushion material for preventing damage and having a complicated shape.

  Hereinafter, specific examples will be described in order to more specifically explain the disclosure of the present specification. The following examples are intended to illustrate the disclosure herein and not to limit its scope.

  In the following examples, an aerosol composition was prepared in an aerosol can using the components shown in Table 1. In Examples 1 and 2, the acrylic resin was dissolved in ethyl acetate and then filled in cans. In Examples 3 to 7, acrylic resins A and H were directly charged into an aerosol can, and C, cyclic silicone and cetanol were dissolved in ethyl acetate and then charged into an aerosol can. Note that dimethyl ether (DME: D) and LPG gas (L) were used as the propellant (gas).

  In the table, the ratio of liquid: propellant represents the volume ratio, liquid represents all the contents including resin, and D / L as the composition of the propellant is dimethyl ether (DME) and LPG gas. Represents the volume ratio of the mixture with

The following supplements the acrylic resin and the isoparaffinic solvent.
Acrylic resin A Tg: 50 ° C, Mw: 160,000
Acrylic resin B Tg: 50 ° C, Mw: 55,000
Acrylic resin C Tg: 50 ° C, Mw: 60,000
Acrylic resin D Tg: 75 ° C, Mw: 30,000
Acrylic resin E Tg: 50 ° C, Mw: 55,000
Acrylic resin F Tg: 50 ° C, Mw: 45,000
Acrylic resin G Tg: 35 ° C, Mw: 140,000
Acrylic resin H Tg: 20 ° C, Mw: 180,000
Acrylic resin I Tg: 84 ° C, Mw: 82,000
Isoparaffinic solvent A Density: 0.820, initial distillation point: 277 ° C, distillation end point: 358 ° C, flash point: 139 ° C, aniline point: 104 ° C
Isoparaffinic solvent B Density: 0.723, initial distillation point: 114 ° C, distillation end point: 139 ° C, flash point: 7 ° C, aniline point: 72 ° C

  In addition, the aerosol compositions of Comparative Examples having the compositions shown in Table 2 were prepared.

(Evaluation method)
About 5 g of these aerosol compositions are sprayed (about 10 cm) on a test plate (melamine decorative plate) at 25 ° C., and a foam is adhered to the test plate. A solidified body was formed, and the following points were evaluated. In addition, about the cleaning property, not the test plate but the groove of the sash on which dust was deposited was used as a test object. The results are shown in Tables 1 and 2.

(1) Drying time The time required to form a solid after spraying was measured as the drying time.
(2) Adhesion The adhesion of the obtained solidified body to the test plate at the time of peeling was determined by a sensory test. The results were evaluated with ×, Δ, ○ and ◎. In addition, these evaluation criteria were as follows.
◎: Very sticky ○: Sticky △: Not very sticky ×: Not sticky (3) Peelability Regarding the peelability of the obtained solidified body, the solidified body is broken when peeled. It was determined by a sensory test whether the film could be easily peeled off without any problem. The results were evaluated with ×, Δ, ○ and ◎. In addition, these evaluation criteria were as follows.
：: very good ：: good あ ま り: not very good ×: bad (4) Foam feeling The foam feeling of the obtained solidified body was observed with the naked eye and judged by the ease of grasping when peeling. The results were evaluated with ×, Δ, ○ and ◎. In addition, these evaluation criteria were as follows.
：: very good △: good あ ま り: not very good ×: bad (5) Detergency The solidified product obtained in the sash groove was peeled off and the cleanliness in the groove was visually observed thereafter. The results were evaluated with ×, Δ, ○ and ◎. In addition, these evaluation criteria were as follows.
◎: Very good ○: Good △: Not very good ×: Bad

  As shown in Tables 1 and 2, all of the aerosol compositions of Examples 1 to 7 exhibited good foam-forming ability, formed a sticky solidified body in an appropriate drying time, and exhibited releasability. Was good. The cleaning performance was also good. That is, the aerosol compositions of Examples 1 to 7 satisfied all of the foam-forming ability, permeability, solidification, adhesiveness, and releasability in a well-balanced manner. In contrast, none of the aerosol compositions of Comparative Examples could exhibit the intended properties as a whole.

  From the above results, the acrylic resin preferably has a weight average molecular weight of 50,000 to 200,000, and more preferably about 60,000 to 180,000. It turned out to be. Further, the glass transition temperature can be 10 ° C. or more and 60 ° C. or less, but it is also found that the glass transition temperature is preferably 20 ° C. or more and 50 ° C. or less. It was also found that the isoparaffinic solvent A was easier to use than the isoparaffinic solvent B. That is, when using an isoparaffin-based solvent, it was found that those having an initial distillation point of about 110 to 120 ° C and an end point of distillation of about 130 to 150 ° C can be preferably used.

Claims (16)

Acrylic resin,
One or more solvents selected from ethyl acetate, n-propyl acetate, isopropyl acetate, n-butyl acetate and isobutyl acetate;
A nonionic surfactant;
Volatile silicone,
A non-volatile silicone oil,
A propellant,
Containing
It is configured such that it is sprayed on any surface and adheres as a foam, and then solidifies to form a solidified body and adheres so that the surface can be temporarily covered so that the solidified body is peeled off from the surface. The composition.   The composition according to claim 1, further comprising a non-volatile silicone oil.   The composition according to claim 1 or 2, which is a composition for surface protection.   The composition according to any one of claims 1 to 3, which is a cleaning composition.   The composition according to claim 4, wherein the composition holds an object to be cleaned on the solidified body and cleans the surface by peeling the solidified body.   The acrylic resin may be dissolved in one or more solvents selected from the group consisting of ethyl acetate, n-butyl acetate, isobutyl acetate, n-butyl cellosolve, toluene, xylene, acetone, methyl ethyl ketone and methyl isobutyl ketone. The composition according to any of claims 1 to 5, which dissolves in a concentration of%.   The composition according to any one of claims 1 to 6, wherein the acrylic resin has a weight average molecular weight of 50,000 or more and 200,000 or less.   The composition according to any one of claims 1 to 7, wherein the acrylic resin has a glass transition temperature of 10C or higher and 60C or lower.   The composition according to claim 1, wherein the solvent includes at least ethyl acetate.   The nonionic surfactant is one or more selected from the group consisting of polyoxyethylene alkyl ethers, polyoxyethylene fatty acid esters, sorbitan fatty acid esters and fatty acid fatty acid esters. The composition according to any one of the above.   The composition according to any one of claims 1 to 10, wherein the volatile silicone is one or more selected from a cyclic silicone and a branched silicone oil.   The composition according to any one of claims 1 to 11, further comprising an aliphatic alcohol having 12 or more carbon atoms.   The composition according to claim 12, wherein the aliphatic alcohol is a solid alcohol at normal temperature. A method of protecting the surface,
A step of supplying a composition that adheres to the object to be coated and adheres in the form of a foam, and then solidifies and then temporarily covers and adheres to the solidified body and the surface of the object to be coated, and solidifies the foam.
A method comprising:   15. The method of claim 14, further comprising the step of exfoliating the solidified composition from the surface. A method of removing an object,
Supplying a composition which temporarily adheres to the surface where the elephant may be present as a foam and then solidifies and solidifies the solid and the surface of the object to be coated; Solidifying the
Removing the object from the surface while peeling the composition after the solidification from the surface,
A method comprising: