JP7199162B2 - Coating composition and its use - Google Patents

Description

This specification relates to coating compositions and uses thereof for coating surfaces.

Conventionally, in order to remove and clean dust of various shapes and sizes such as granular, fibrous, and irregular shapes, which are present in recesses and gaps of finely uneven surfaces, for example, suction with a vacuum cleaner, etc., and impregnation with a cleaning agent. Wiping with a cleaning sheet, adsorption with a non-woven fabric sheet with adsorption fibers (Patent Document 1), scraping and adsorption with a holding body of adsorption long fibers (Patent Document 2), etc. are often adopted.

JP 2015-92954 A Japanese Patent Application Laid-Open No. 2007-236690

However, suction with a vacuum cleaner requires trouble such as carrying the vacuum cleaner, and there is a problem of followability to concave portions and the like depending on the shape of the tip portion for suction. Moreover, even in the case of wiping off with a cleaning sheet, the followability to concave portions and the like is still a problem. Furthermore, in the case of the holding body of the adsorption long fibers, although it has the ability to follow the recesses, there is a problem that it is insufficient to secure heavy dust and fine particle dust.

Up to now, there has not been provided a cleaning means that can follow the recesses and gaps of the uneven surface and can reliably remove the object to be removed regardless of its shape, weight, and the like.

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

In view of such conventional problems, the present specification provides means for temporarily coating a surface with good conformability to any surface. In addition, the present specification provides a means that has good followability to the surface to be cleaned and can effectively remove objects to be removed that are difficult to secure with adsorbent fibers.

The inventors of the present invention have applied the study to the coating means of the aerosol composition. It was found that the solidified body can be configured so that it adheres, coats and adheres to the surface, and can be easily peeled off from the surface after use. It has been found that the body can capture and solidify objects on the surface to be cleaned and removed from the surface to be cleaned along with the object to be removed. This specification provides the following means based on such knowledge.

(1) an acrylic resin;
one or more solvents selected from ethyl acetate, n-propyl acetate, isopropyl acetate, n-butyl acetate and isobutyl acetate;
a nonionic surfactant;
a volatile silicone;
a propellant;
contains
It is configured such that it is sprayed onto an arbitrary surface, forms a foam and adheres to it, then solidifies into a solidified body to temporarily adhere to the surface so as to be able to cover the surface, and the solidified body is peeled off from the surface. composition.
(2) The composition according to (1), which further contains a non-volatile silicone oil.
(3) The composition according to (1) or (2), which is a surface protective composition.
(4) The composition according to any one of (1) to (3), which is a cleaning composition.
(5) The composition according to (4), wherein an object to be cleaned is held on the solidified body and the surface is cleaned by peeling off 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 dissolves 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 or more and 200,000 or less.
(8) The composition according to any one of (1) to (7), wherein the acrylic resin has a glass transition temperature of 10°C or higher and 60°C or lower.
(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 phosphate fatty acid esters, (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 cyclic silicone and branched silicone oils.
(12) The composition according to any one of (1) to (11), further containing an aliphatic alcohol having 12 or more carbon atoms.
(13) The composition according to (12), wherein the aliphatic alcohol is an alcohol that is solid at room temperature.
(14) A surface protection method comprising:
A step of supplying to an object to be coated a composition that adheres in the form of a foam and then solidifies to temporarily cover the surface of the solid and the object to be coated, and solidifies the foam;
A method.
(15) The method according to (14), further comprising peeling the composition after solidification from the surface.
(16) A method for removing an object, comprising:
A composition that adheres to the surface of the object that may exist in the form of a foam and then solidifies to temporarily cover and adhere to the solid and the surface of the object to be coated is supplied, and the foam solidifying the body;
peeling the solidified composition from the surface and removing the object from the surface;
A method.

This specification relates to compositions and uses thereof that can coat any surface. According to the composition disclosed in the present specification (hereinafter also referred to as the present composition), since it adheres to the surface of an object as a foam, it can follow the surface of the object, which may include an uneven surface, with good conformability. reach. In addition, since the present composition is dried and solidified while maintaining adhesiveness, it can easily form a solidified body that coats and adheres to the surface of an object with good followability. Therefore, it can be used for protecting such objects and their surfaces, cushioning objects from other objects, suppressing vibrations of objects, and packaging objects. In addition, since the solidified body of the present composition can be easily peeled off from the surface of an object, it is convenient for temporary protection.

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

The composition adheres to the surface through a foam to form a solidified body. Therefore, it solidifies with excellent followability to the surface. Therefore, even recesses and protrusions can be covered with good followability, and reliable covering and adhesion protection can be achieved. In addition, due to such follow-on solidification properties, it is also useful for removing, recovering, and cleaning objects in recesses and protrusions.

By peeling off the solidified body of the present composition, the surface protection can be released, the object to be removed can be removed, and the like. That is, according to the present composition, the purpose can be achieved by simply supplying the present composition to the surface of the object, without using special tools, without requiring complicated work, and without getting the hands dirty. can be done.

Various embodiments of the composition and its use are described below.

(Coating composition)
The composition can contain an acrylic resin, a solvent, a nonionic surfactant, a volatile silicone, a nonvolatile silicone oil, and a propellant. By containing such a component, the present composition can be configured to be sprayed onto any surface to form a foam that adheres to the surface, and then solidify to form a solid body that covers the surface. Moreover, the solidified body of the present composition can be configured to be peeled off from the surface. Therefore, the present composition can be used as a surface protection composition, a cleaning composition, etc., as described above.

(acrylic resin)
Examples of acrylic resins include, but are not limited to, homopolymers or copolymers using one or more (meth)acrylic acid esters as monomers. Here, (meth)acrylic acid ester means methacrylic acid ester or acrylic acid ester, and (meth)acrylic acid esters include methyl (meth)acrylate, ethyl (meth)acrylate, (meth)acryl Acid n-butyl, iso-butyl (meth)acrylate, t-butyl (meth)acrylate, (meth)acrylic acid alkyl esters such as 2-ethylhexyl (meth)acrylate, cyclohexyl (meth)acrylate, (meth) ) methyl cyclohexyl acrylate, bornyl (meth) acrylate, isobornyl (meth) acrylate, cycloalkyl (meth) acrylates such as adamantyl (meth) acrylate, phenyl (meth) acrylate, benzyl (meth) acrylate (meth)acrylic acid aromatic esters such as fluorophenyl (meth)acrylate, chlorophenyl (meth)acrylate, fluorobenzyl (meth)acrylate, and chlorobenzyl (meth)acrylate substituted aromatic (meth)acrylates group esters, (meth)acrylic acid halogenated alkyl esters such as fluoromethyl (meth)acrylate and fluoroethyl (meth)acrylate, (meth)acrylic acid hydroxyalkyl esters, (meth)acrylic acid glycidyl, (meth)acryl acid ethylene glycol ester, (meth)acrylic acid polyethylene glycol ester, and the like. For example, methyl methacrylate, methyl acrylate and the like can be used.

The acrylic resin may contain a carboxy group-containing monomer such as (meth)acrylic acid and have an acid value. The acid value may be, for example, 1 mgKOH/g or more, for example, 2 mgKOH/g or more, for example, 2.5 mgKOH/g or more, or for example, 3 mgKOH/g or more. The acid value may also be, for example, 6 mgKOH/g or less, or may be, for example, 5 mgKOH/g or less, or may be, for example, 4 mgKOH/g or more but not more than 4 mgKOH/g.

In addition to (meth)acrylic acid esters and (meth)acrylic acid, acrylic resins include aromatics such as styrene, α-substituted styrenes such as α-methylstyrene and α-ethylstyrene, and nuclear-substituted styrenes such as fluorostyrene and methylstyrene. vinyl compounds, vinyl cyanide compounds such as acrylonitrile and methacrylonitrile; Unsaturated dibasic acids such as maleimide, maleic acid, maleic anhydride, and fumaric acid or their derivatives, (meth)acrylamide, N,N-dimethyl(meth)acrylamide, N,N-diethyl(meth)acrylamide, etc. ) acrylamides, unsaturated fatty acids such as (meth)acrylic acid, and derivatives thereof.

Such an acrylic resin may take any form, for example, it may be in the form of beads. Methods for producing acrylic resins are well known. For example, a bead-like polymer is produced by suspension polymerization by stirring a polymerization initiator and, if necessary, a chain transfer agent in a monomer composition for obtaining an acrylic resin. , is dissolved, and then the obtained uniform mixed solution is suspended in a dispersion medium (eg, aqueous medium) in which a dispersion stabilizer is present. A predetermined polymerization temperature is maintained for a certain period of time to complete the polymerization. The resulting suspension polymer is filtered, washed with water and dried to obtain a bead polymer.

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

The acrylic resin is, for example, ethyl acetate, n-butyl acetate, isobutyl acetate, n-butyl cellosolve, toluene, xylene, acetone, methyl ethyl ketone and methyl isobutyl ketone. It can have the solubility to dissolve at a concentration of 20% by mass. The solubility was determined by weighing the acrylic resin and solvent in a screw tube (melting temperature: 23° C.), stirring with a mix rotor at 70 rpm for 12 hours, and observing (visually checking) the state of dissolution after stirring. If so, it was determined to have dissolved.

Since the solvent has such solubility, it is possible to exhibit the function specific to the present composition. Although it is not particularly limited, it preferably has the solubility required for the solvent used in the present composition. For example, it preferably has the above 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, foamability, adhesiveness, peelability, washability, dryness, etc. can be satisfied. Also, for example, 60,000 to 180,000. Weight average molecular weight can be measured using gel permeation chromatography (GPC) using polystyrene as a standard.

The glass transition temperature (Tg) of the acrylic resin is not particularly limited, but can be, for example, 10° C. or higher and 60° C. or lower. Within this range, the solidified body can be effectively formed under the assumed usage conditions. Tg is, for example, 20° C. or higher and 50° C. or lower. The Tg of an acrylic resin is a value calculated from the FOX formula using the values described in Polymer Handbook (J.Brandrup, Interscience, 1989).

The amount of the acrylic resin to be blended with respect to the total mass of the present composition, excluding the propellant, can be determined in consideration of necessary coatability, solidification properties, peelability, and the like. For example, the acrylic resin is 20% by mass or more, for example, 30% by mass or more, or for example, 35% by mass or more, or for example, 40% by mass, of the total mass of the composition other than the propellant. That's it. Further, 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, or for example, 65% by mass or less, or for example, 60% by mass or less. % by mass or less. Typically, the acrylic resin is, for example, 20% to 60% by weight, or, for example, 30% to 60% by weight, based on the total weight of the 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 the solubility of the acrylic resin. That is, in addition to these single solvents, mixed liquids of two or more selected from these can be used. Although not particularly limited, for example, it preferably contains at least ethyl acetate. This is because ethyl acetate greatly contributes to the solubility of the acrylic resin, the permeability of the foam into recesses and the like, and the ability to form foam.

Such acetic esters can be appropriately blended with respect to the total mass of the present composition excluding the propellant, and are, for example, 10% by mass or more, or, for example, 15% by mass or more, or, for example, 20% by mass or more. % by mass or more, for example, 25% by mass or more, or for example, 30% by mass or more. In addition, the acetic acid ester is 70% by mass or less, for example, 65% by mass or less, or, for example, 60% by mass or less, relative to 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, or, for example, 20% by mass or more and 60% by mass or less, relative to the total mass of the composition other than the propellant. .

Furthermore, in combination with these, a hydrocarbon solvent such as isoparaffin can be used as appropriate. Hydrocarbon solvents are excellent in dissolving the acrylic resin, have good volatility, and can contribute to securing a short drying time. Considering the contribution to the solubility of the acrylic resin 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. JIS K2254 or ASTM D86 can be used for such distillation characteristics.

Furthermore, linear or branched alcohols 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. This is because alcohol generally contributes greatly to the permeability and foam forming ability of the foam. From this point of view, the alcohol is preferably a linear alcohol having 1 to 4 carbon atoms, more preferably ethyl alcohol.

Furthermore, it can contain water. This is because water greatly contributes to the permeability and foam forming ability of the foam. In addition, water can contribute to the removal of water-based stains that cannot be removed by other ingredients.

Furthermore, ketones such as acetone, methyl ethyl ketone, 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, it is preferable to use acetone, for example.

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

(Nonionic surfactant)
Nonionic surfactants have a contribution to foam permeability, solidification plasticity and foam-forming ability, and release properties. As the nonionic surfactant, one or more selected from the group consisting of polyoxyethylene alkyl ethers, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters and sorbitan fatty acid esters can be used. Polyoxyethylene alkyl ethers include, for example, polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, and polyoxyethylene octyldodecyl ether. Polyoxyethylene fatty acid esters include, for example, polyethylene glycol monolaurate, polyoxyethylene monostearate, monooxyethylene distearate, and monooxyethylene monooleate. Polyoxyethylene sorbitan fatty acid esters include polyoxyethylene sorbitan monoclonal laurate, polyoxyethylene sorbitan monostearate, and polyoxyethylene sorbitan monoclonal oleate. Sorbitan fatty acid esters include, for example, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan distearate, sorbitan tristearate, sorbitan monooleate, sorbitan trioleate and the like.

The blending 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 application of the acrylic resin and other components. It is not less than 1% by weight of the total weight of the composition, for example not less than 2% by weight, and for example not less than 3% by weight. In addition, the solvent is 10% by mass or less, for example, 8% by mass or less, or, for example, 7% by mass or less, or, for example, 6% by mass or less, relative to the total mass of the present composition excluding the propellant. % by mass or less. Typically, the nonionic surfactant is, for example, 1% or more and 8% or less, and for example, 2% or more and 7% by weight, based on the total weight of the composition other than the propellant. It is below.

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

When polyoxyethylene alkyl ether is used, it is preferable to use a phosphate fatty acid ester and an oil agent, which will be described later. This is because the polyoxyethylene alkyl ether greatly contributes to the permeability of the foam and also contributes to the plasticity and foam-forming ability of the solidified product. This is because it also contributes to formability.

(Phosphate fatty acid ester)
Phosphate fatty acid esters include tripalmitoleyl phosphate, trieryidyl phosphate, trioleyl phosphate, trilinoleyl phosphate, trieride linoleyl phosphate, trilinolenyl phosphate, trierucyl phosphate, or alkylene oxide adducts thereof. and unsaturated phosphoric triesters of Such a phosphate 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. Phosphate fatty acid esters also contribute to rust prevention.

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

(Oil solution)
Oil agents include isostearyl myristate, isocetyl myristate, isotridecyl myristate, isopropyl myristate, octyldodecyl myristate, butyl myristate, myristyl myristate, hexyldecyl myristoylmethylaminopropionate, citronellyl methylcrotonate, meadowfoam est. Lido, Meadowfoam Oil Fatty Acid Octyldodecyl, (Coconut Fatty Acid/Citrate/Lactic Acid) Glyceryl, Coconut Fatty Acid Decyl, Hexyl Laurate, Cholesteryl Butyrate, Dihydrocholesteryl Butyrate, Isopropyl Lanolin Fatty Acid, Octyldodecyl Lanolin Fatty Acid, Cholesteryl Lanolin Fatty Acid, Ester oils, such as octyldodecyl ricinoleate, cetyl ricinoleate, isopropyl linoleate, ethyl linoleate, and the like. The oil greatly contributes to the permeability of the foam and contributes to the plasticity and foam forming ability of the solidified product.

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

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

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

The blending 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 application of the acrylic resin and other components. is 0.2% by mass or more, for example, 0.5% by mass or more, or, for example, 1% by mass or more. In addition, the solvent is 4% by mass or less, for example, 3% by mass or less, or, for example, 2% by mass or less, relative to the total mass of the composition excluding the propellant. Typically, the fatty alcohol is, based on the total weight of the composition other than the propellant, such as from 0.5% to 4% by weight, and such as from 0.5% to 3% by weight. % or less, and for example, 0.5% by mass or more and 2% by mass or less.

(volatile silicone)
The composition may contain volatile silicones. Volatile silicone greatly contributes to the peeling of the solidified material, and also contributes to the plasticity, permeability, and peelability of the solidified material. Volatile silicones include, for example, cyclic silicones such as cyclopentasiloxane and branched silicone oils such as methylmethicone.

The blending ratio of the volatile silicone to the total mass of the composition other than the propellant can be appropriately set according to the type and application of the acrylic resin and other components. is 0.2% by mass or more, for example, 0.5% by mass or more, or, for example, 1% by mass or more. Also, the volatile silicone is 4% by mass or less, or, for example, 3% by mass or less, or, for example, 2% by mass or less, relative to the total mass of the composition excluding the propellant. Typically, the volatile silicone is, for example, from 0.5% to 4% by weight and, for example, from 0.5% to 3% by weight, based on the total weight of the composition other than propellant. % or less, and for example, 0.5% by mass or more and 2% by mass or less.

(non-volatile silicone oil)
The composition may contain a non-volatile silicone oil. Non-volatile silicone oil greatly contributes to the release of the solidified material, and also contributes to the plasticity of the solidified material. Non-volatile silicone oils include dimethicone (dimethylpolysiloxane).

The blending 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 types and applications of the acrylic resin and other components. It is 0.5% by mass or more of the total mass of the product, or, for example, 1% by mass or more, or, for example, 1.5% by mass or more. The non-volatile silicone oil is 5% by mass or less, for example, 4% by mass or less, or, for example, 3% by mass or less, relative to the total mass of the composition excluding the propellant. Typically, the nonvolatile silicone oil is, for example, 1% or more and 5% or less by weight, or, for example, 1.5% or more and 4% by weight, based on the total weight of the composition other than the propellant. or less, or, for example, 2% by mass or more and 4% by mass or less.

(propellant)
The propellant is not particularly limited, but dimethyl ether, LPG, known alternatives to Freon, and new alternatives to Freon can be used. 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 an appropriate drying property, it is preferable to contain not only dimethyl ether but also LPG. The blending ratio of dimethyl ether and LPG can be changed as appropriate. For example, dimethyl ether:LPG can be used at a ratio of 30:70 to 70:30 (mass ratio, the same shall apply hereinafter). Further, for example, dimethyl ether:LPG can be 40:60 to 60:40. Within such a range, it greatly contributes to the drying property, and also exhibits a good contribution to the solubility and foam forming ability of the acrylic resin.

Nitrogen and carbon dioxide, which are inorganic gases, can be used as the propellant. For fine adjustment of the injection state, pressurization may be performed with nitrogen gas, carbon dioxide gas, compressed air, argon, helium, oxygen, nitrous oxide, or the like.

The mixing ratio of the propellant and the present composition (liquid agent) other than the propellant (liquid agent:propellant, provided that the volume ratio) is, for example, 10:90 to 90:10, or, for example, 20:80 to 80. :20, or for example, 30:70 to 70:30, or 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, a nonvolatile silicone oil, an oil and It contains one or more selected from fatty acid phosphates.

A person skilled in the art can appropriately determine the blending of the various components in the present composition based on the intended foam forming ability, permeability, adhesiveness, covering property, peeling property, and the like of the present composition.

As described above, the present composition is advantageous for surface protection, vibration suppression, cushioning, packaging, object removal, collection, cleansing, cleaning, and the like. Therefore, the present composition can be used as a surface protective agent, a vibration dampening agent, a buffering agent, a packaging agent, an object removing agent, an object recovering agent, a cleaning agent, and a cleaning agent.

The composition containing all components other than the propellant can also be prepared as a concentrate composition for aerosol.

(Surface protection method)
The composition can be used, for example, as follows to coat and protect the surface of an object to be coated. That is, a step of supplying the present composition to an object to be coated, which adheres in the form of a foam and then solidifies to temporarily cover the surface of the solid and the object to be coated, and solidifies the foam; be prepared. By doing so, the surface of the object to be coated can be protected. Such protection can also be implemented as a cushioning method, a vibration suppression method, and a packaging method.

The protection method can further comprise peeling the composition from the surface after hardening. By doing so, the solidified body can be easily peeled off from the surface, and surface protection can be easily eliminated. In addition, the present protection method can cover concave and convex portions with good followability to protect such surfaces.

(Object removal method)
The composition can be used, for example, in the following manner to remove objects to be removed from surfaces where such objects may reside. That is, the present composition, which forms a foam and adheres to a surface on which an object to be removed may exist, then solidifies to temporarily cover the surface of the solidified substance and the object to be coated, is supplied; The method includes a step of solidifying the 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 adheres to the surface of the object through a foam on the surface of the object and forms a solidified body covering the surface of the object. Objects such as can be surrounded or captured by the solidified body. In addition, these objects to be removed can be removed or recovered by peeling the solidified material from the surface of the object. The method can also be implemented as a method of removing or recovering material to be removed from the surface of an object, or as a method of cleaning or cleaning a surface.

In addition, the present removal method can cover recesses and protrusions with good followability and remove objects on such surfaces. Therefore, it is suitable for cleaning recesses such as sash frames (grooves) in houses, recesses such as various pockets in vehicles, trims, floors, etc., furniture, remote controls for televisions, keyboards, etc. In addition, it can be suitably used as a cushioning material for preventing damage and having a complicated shape.

Examples are given below as specific examples in order to more specifically describe the disclosure of the present specification. The following examples are intended to illustrate the disclosure herein, but not to limit its scope.

In the following examples, the ingredients shown in Table 1 were used to prepare aerosol compositions in aerosol cans. In Examples 1 and 2, the can was filled after the acrylic resin was dissolved in ethyl acetate. In Examples 3 to 7, the acrylic resins A and H were put directly into aerosol cans, and the acrylic resins C, cyclic silicone and cetanol were put into aerosol cans after being dissolved in ethyl acetate. Dimethyl ether (DME:D) and LPG gas (L) were used as the propellant (gas).

In the table, the liquid:propellant ratio represents the volume ratio, the liquid represents all the liquid contents including the 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 acrylic resin and the isoparaffin-based solvent are supplemented below.
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 boiling point: 277°C, end point: 358°C, flash point: 139°C, aniline point: 104°C
Isoparaffin-based solvent B density: 0.723, initial boiling point: 114°C, end point: 139°C, flash point: 7°C, aniline point: 72°C

Also, an aerosol composition as a comparative example was prepared with the composition shown in Table 2.

(Evaluation method)
About 5 g of these aerosol compositions are sprayed (approximately 10 cm) onto a test plate (melamine decorative plate) at 25° C., and the foam adheres to the test plate. A flexible solidified body was formed, and the following points were evaluated. Regarding the washability, the test object was not the test plate but the groove of the sash in which dust was deposited. These results are shown in Tables 1 and 2 together.

(1) Drying Time After spraying, the drying time was measured until a solidified body was formed.
(2) Adhesiveness With regard to the adhesiveness of the obtained solidified product, the degree of adhesion to the test plate when peeled off was judged by a sensory test. The results were evaluated by ×, Δ, ○ and ⊚. In addition, these evaluation criteria were as follows.
◎: Very sticky ○: Sticky △: Not very sticky ×: Not sticky A sensory test was performed to determine whether the film could be easily peeled off without removing the film. The results were evaluated by ×, Δ, ○ and ⊚. In addition, these evaluation criteria were as follows.
⊚: very good ○: good △: not so good ×: bad (4) Foamy feel The foamy feel of the obtained solidified product was observed with the naked eye and judged by the ease of gripping when peeled off. The results were evaluated by ×, Δ, ○ and ⊚. In addition, these evaluation criteria were as follows.
A: Very good O: Good △: Not so good X: Poor (5) Detergency The solidified product obtained in the groove of the sash was peeled off, and the cleanliness of the groove was observed with the naked eye. The results were evaluated by ×, Δ, ○ and ⊚. In addition, these evaluation criteria were as follows.
◎: Very good ○: Good △: Not so 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 sticky solidified bodies in an appropriate drying time, and exhibited peelability. was good. In addition, the cleaning performance was also good. That is, the aerosol compositions of Examples 1 to 7 were well balanced in all of foam forming ability, permeability, solidifying ability, adhesiveness, and releasability. On the other hand, none of the aerosol compositions of Comparative Examples could exhibit the intended properties as a whole.

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

Claims (15)

Acrylic resin, one or more solvents selected from ethyl acetate, n-propyl acetate, isopropyl acetate, n-butyl acetate and isobutyl acetate, nonionic surfactant, volatile silicone, and non-volatile A composition containing a silicone oil and a propellant,
20% by mass or more and 60% by mass of the acrylic resin, 10% by mass or more and 60% by mass or less of the one or more solvents, and the nonionic 1% to 8% by mass of a surfactant, 0.2% to 3% by mass of the volatile silicone, and 1% to 5% by mass of the nonvolatile silicone oil,
containing the propellant which is a mixture of dimethyl ether and LPG gas at a volume ratio of the propellant to the composition other than the propellant of 30:70 to 70:30;
A composition that is sprayed onto an arbitrary surface to form a foam that adheres to the surface, then solidifies into a solidified body that temporarily adheres to the surface so as to be able to cover the surface, and that the solidified body is peeled off from the surface. The composition of claim 1, which is a surface protection composition. 3. The composition of claim 1 or 2, which is a cleaning composition. 4. The composition according to claim 3 , wherein said composition holds an object to be cleaned on said solidified body and cleans said surface by peeling off said solidified body. The acrylic resin is 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. A composition according to any one of claims 1 to 4, which dissolves at a % concentration. The composition according to any one of claims 1 to 5, 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 6, wherein the acrylic resin has a glass transition temperature of 10°C or higher and 60°C or lower. A composition according to any preceding claim, wherein the solvent comprises at least ethyl acetate. Claims 1 to 8, wherein 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 phosphate fatty acid esters. The composition according to any one of The composition according to any one of claims 1 to 9, wherein the volatile silicone is one or more selected from cyclic silicones and branched silicone oils. The composition according to any one of claims 1 to 10, further comprising an aliphatic alcohol having 12 or more carbon atoms. 12. The composition according to claim 11, wherein the fatty alcohol is a room temperature solid alcohol. A method of protecting a surface, comprising:
A composition is supplied to an object to be coated, which adheres in the form of a foam and then solidifies to form a solidified composition that temporarily covers and adheres to the surface of the object to be coated, and the foam is solidified. process,
with
The composition comprises an acrylic resin, one or more solvents selected from ethyl acetate, n-propyl acetate, isopropyl acetate, n-butyl acetate and isobutyl acetate, a nonionic surfactant, and a volatile containing a non-volatile silicone, a non-volatile silicone oil, and a propellant,
20% by mass or more and 60% by mass of the acrylic resin, 10% by mass or more and 60% by mass or less of the one or more solvents, and the nonionic 1% to 8% by mass of a surfactant, 0.2% to 3% by mass of the volatile silicone, and 1% to 5% by mass of the nonvolatile silicone oil,
A method comprising said propellant being a mixture of dimethyl ether and LPG gas in a volume ratio of said propellant: said composition other than said propellant of 30:70 to 70:30 . 14. The method of claim 13, further comprising peeling the composition after hardening from the surface. A method for removing an object,
supplying a composition that adheres to the surface of the object that may exist in the form of a foam and then solidifies to form a solid that temporarily covers the surface of the object; solidifying the body;
peeling the solidified composition from the surface and removing the object from the surface;
with
The composition comprises an acrylic resin, one or more solvents selected from ethyl acetate, n-propyl acetate, isopropyl acetate, n-butyl acetate and isobutyl acetate, a nonionic surfactant, and a volatile containing a non-volatile silicone, a non-volatile silicone oil, and a propellant,
20% by mass or more and 60% by mass of the acrylic resin, 10% by mass or more and 60% by mass or less of the one or more solvents, and the nonionic 1% to 8% by mass of a surfactant, 0.2% to 3% by mass of the volatile silicone, and 1% to 5% by mass of the nonvolatile silicone oil,
A method comprising said propellant being a mixture of dimethyl ether and LPG gas in a volume ratio of said propellant: said composition other than said propellant of 30:70 to 70:30.