Composition for forming coating film

Abstract

The present invention relates to a composition for forming a coating film, which is used for forming a coating film comprising a fiber-containing deposit on the skin by electrostatically spraying a powder dispersion, the powder dispersion contains the following components (A), (B), (C), and (D): (A) a powder, (B) a polymer having a monomer unit with an SP value of 8.6 or more, (C) one or more volatile substances selected from alcohols and ketones, and (D) a polymer having a fiber-forming ability, and the mass ratio (A / B) of component (A) to component (B) is 5-200 inclusive.

Description

Technical Field

[0001] The present invention relates to a composition for forming a coating by electrostatic spraying, and utilization of the composition. Background Art

[0002] Powder dispersions in which powders are dispersed in liquids have been widely used in the fields of cosmetics, coatings, printing inks, etc. Among them, regarding powder dispersions using alcohols or ketones as dispersion media, there has been reported a powder dispersion (sprayable composition) containing: (a) one or more volatile substances selected from water, alcohols, and ketones; (b) a polymer having film-forming ability; and (c) powders (Patent Document 1).

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-177794 Summary of the invention

[0004] The present invention relates to a composition for forming a coating by electrostatic spraying, a method for producing a coating using the composition, a fiber sheet formed by electrostatic spraying, and a powder dispersion used in the composition for forming a coating.

[0005] Specific embodiments of the present invention are as follows [1] to [4].

[0006] [1] A film-forming composition for forming a film composed of fiber-containing deposits on the skin by electrostatically spraying a powder dispersion, the powder dispersion containing the following components (A), (B), (C) and (D):

[0007] (A) Powder,

[0008] (B) a polymer having a monomer unit having an SP value of 8.6 or more,

[0009] (C) one or more volatile substances selected from alcohols and ketones, and

[0010] (D) Polymers with fiber-forming ability

[0011] Furthermore, the mass ratio (A / B) of the component (A) to the component (B) is 5 or more and 200 or less.

[0012] [2] A method for producing a coating, wherein a coating composed of a deposit containing fibers is formed on a surface of an object to be coated using a powder dispersion, the powder dispersion containing the following components (A), (B), (C) and (D):

[0013] (A) Powder,

[0014] (B) a polymer having a monomer unit having an SP value of 8.6 or more,

[0015] (C) one or more volatile substances selected from alcohols and ketones, and

[0016] (D) a polymer having fiber-forming ability,

[0017] Furthermore, the mass ratio (A / B) of the component (A) to the component (B) is 5 or more and 200 or less.

[0018] [3] A fiber sheet comprising the following components (A), (B) and (D):

[0019] (A) Powder,

[0020] (B) a polymer having a monomer unit having an SP value of 8.6 or more, and

[0021] (D) Polymers with fiber-forming ability

[0022] Furthermore, the mass ratio (A / B) of the component (A) to the component (B) is 5 or more and 200 or less.

[0023] [4] A powder dispersion comprising the following components (A), (B) and (C):

[0024] (A) Powder,

[0025] (B) a polymer having a monomer unit having an SP value of 8.6 or more, and

[0026] (C) one or more volatile substances selected from alcohols and ketones,

[0027] Furthermore, the mass ratio (A / B) of the component (A) to the component (B) is 5 or more and 200 or less. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of an electrostatic spray device preferably used in the present invention.

[0029] Figure 2 This is a schematic diagram of the electrostatic spray method using an electrostatic spray device. DETAILED DESCRIPTION

[0030] The present invention provides a film-forming composition which, when a film is formed by spraying with an electrostatic spray, improves the color development of makeup and is less likely to come off over time.

[0031] The powder dispersion (sprayable composition) described in Patent Document 1 has a powder layer that is easily viscous and precipitates in the above-mentioned volatile substances, and has problems with dispersibility and stability during storage. For example, when using the powder dispersion to form a cosmetic film, it is known that there are problems such as reduced color development when used as makeup and makeup removal over time.

[0032] Therefore, the present inventors added various components when dispersing the powder in the volatile substance, and studied the dispersibility and dispersion stability after storage. As a result, it was found that by mixing a polymer having a predetermined SP value and the powder at a certain ratio, the powder can be dispersed in a small particle size and the aggregation over time can be suppressed, thereby obtaining a powder dispersion having excellent powder dispersibility and dispersion stability. In addition, it was found that by electrostatically spraying a film-forming composition obtained by mixing a polymer having fiber-forming ability in the powder dispersion, a film having improved color development of makeup and less prone to makeup removal over time can be obtained.

[0033] The film-forming composition of the present invention forms a film composed of fiber deposits by electrostatic spraying, and the obtained film has improved color development as makeup and excellent effect of suppressing makeup removal over time. In addition, for the above-mentioned powder dispersion, the hydrophobic powder in the dispersion can be dispersed in a small particle size and dispersed uniformly, thereby improving stability.

[0034] The present invention relates to a composition for forming a coating by electrostatic spraying, a method for producing a coating using the composition, a fiber sheet formed by electrostatic spraying, and a powder dispersion used in the coating-forming composition.

[0035] First, the powder dispersion will be described.

[0036] One embodiment of the present invention is a powder dispersion containing the following components (A), (B) and (C):

[0037] (A) Powder,

[0038] (B) a polymer having a monomer unit having an SP value of 8.6 or more, and

[0039] (C) one or more volatile substances selected from alcohols and ketones,

[0040] Furthermore, the mass ratio (A / B) of the component (A) to the component (B) is 5 or more and 200 or less.

[0041] The powder (A) of the present invention may be any powder commonly used in cosmetics, and there are no particular limitations on the shape such as spherical, plate-like, needle-like, particle size such as smoke-like, microparticles, pigment-grade, and particle structure such as porous, non-porous, etc. In addition, any kind of organic powder or inorganic powder may be used, any kind of hydrophilic powder or hydrophobic powder may be used, and a hydrophilized powder or a hydrophobized powder may be used.

[0042] The so-called "hydrophilic powder" here generally refers to, for example, a powder that has the property of settling or dispersing in water when it is sprinkled on the water surface. In addition, the so-called "hydrophobic powder" generally refers to a powder that has the property of not mixing quickly when water and powder are mixed, and the powder floats on the water surface.

[0043] Examples of the inorganic powder include: red iron oxide, iron hydroxide, iron titanate, yellow iron oxide, black iron oxide, carbon black, Prussian blue, ultramarine, manganese violet, cobalt violet, chromium oxide, chromium hydroxide, cobalt oxide, cobalt titanate and other colored pigments; titanium oxide, zinc oxide, zirconium oxide, magnesium oxide, cerium oxide, aluminum oxide, barium sulfate, calcium sulfate, magnesium sulfate, magnesium carbonate, calcium carbonate, talc, mica, kaolin, sericite, silicic acid, anhydrous silicic acid, aluminum silicate, magnesium silicate, magnesium aluminum silicate, calcium silicate, barium silicate, strontium silicate, tungstate metal salts, hydroxyapatite, vermiculite, bentonite, montmorillonite, hectorite, smectite, zeolite, ceramic powder, phosphoric acid White or body pigments such as calcium hydroxide, aluminum oxide, silicon dioxide, aluminum hydroxide, boron nitride, and synthetic sericite; fish scale foil, titanium oxide-coated mica (mica titanium), bismuth oxychloride, titanium oxide-coated bismuth oxychloride, titanium oxide-coated talc, titanium oxide-coated colored mica, titanium oxide-coated iron oxide-coated mica, mica titanium coated with microparticles of titanium oxide, mica titanium coated with microparticles of zinc oxide, mica titanium treated with organic pigments, mica coated with low-order titanium oxide, mica, synthetic mica coated with titanium oxide, plate-like silica coated with titanium oxide, hollow plate-like titanium oxide, mica coated with iron oxide, plate-like iron oxide (MIO), aluminum flakes, stainless steel flakes, titanium oxide-coated plate-like aluminum oxide, pearl shells, gold foil, gold-plated resin film, metal-deposited resin film, and other pearlescent pigments (bright powder).

[0044] In addition, examples of organic powders include: silicone resin, polymethylsilsesquioxane, nylon powder, silk powder, urethane powder, cellulose powder and other organic powders; organic tar pigments such as Red No. 104, Red No. 102, Red No. 226, Red No. 201, Red No. 202, Yellow No. 4, Black No. 401, organic pigments and their lakes, and one or more of these can be used.

[0045] The powders used in the present invention can be used directly, or one or more of them can be treated to be hydrophobic. The hydrophobic treatment can be any treatment usually performed on cosmetic powders, and the rest is not limited. For example, a surface treatment agent such as a fluorine compound, a silicone compound, a metal soap, an amino acid compound, lecithin, an alkyl silane, an oil, an organic titanate, etc. can be used, and dry treatment, wet treatment, etc. can be performed.

[0046] Specific examples of the surface treatment agent include: fluorine compounds such as perfluoropolyether, perfluoroalkyl phosphate, perfluoroalkyl alkoxysilane, and fluorine-modified silicone; silicone compounds such as dimethylpolysiloxane, methylhydrogenpolysiloxane, cyclic silicone, unilaterally or bilaterally terminally trialkoxy-modified organopolysiloxane, cross-linked silicone, silicone resin, fluorine-modified silicone resin, and acrylic modified silicone; metal soaps such as aluminum stearate, aluminum myristate, zinc stearate, and magnesium stearate; amino acid compounds such as proline, hydroxyproline, alanine, glycine, sarcosine, glutamic acid, aspartic acid, lysine, and derivatives thereof; lecithin, hydrogenated lecithin; alkyl silanes such as methyltrimethoxysilane, ethyltrimethoxysilane, hexyltrimethoxysilane, octyltrimethoxysilane, and octyltriethoxysilane; oils such as polyisobutylene, waxes, and greases; organic titanates such as isopropyl titanium triisostearate, and the like.

[0047] The powder used in the present invention may be a product obtained by subjecting one or more of these to a hydrophilic treatment. Regarding the hydrophilic treatment, as long as it is a treatment performed on a conventional cosmetic powder, there are no other limitations. Examples include: plant polymers such as gum arabic, tragacanth, arabinogalactan, locust bean gum (carob gum), guar gum, karaya gum, carrageenan, pectin, agar, quince seeds (marumero), starch (rice, corn, potato, wheat), alginate, tragacanth gum, locust bean gum; microbial polymers such as xanthan gum, dextran, succinoglucan, pullulan; animal polymers such as collagen, casein, albumin, deoxyribonucleic acid (DNA) and its salts; starch polymers such as carboxymethyl starch, methyl hydroxypropyl starch; methyl cellulose, ethyl Cellulose-based polymers such as cellulose, methylhydroxypropyl cellulose, carboxymethyl cellulose, hydroxymethyl cellulose, hydroxypropyl cellulose, nitrocellulose, sodium cellulose sulfate, sodium carboxymethyl cellulose, crystalline cellulose, and cellulose powder; alginic acid-based polymers such as sodium alginate and propylene glycol alginate; vinyl-based polymers such as polyvinyl methyl ether, polyvinyl pyrrolidone, and carboxyvinyl polymer; polyoxyethylene-based polymers such as polyethylene glycol and polyethylene glycol silane; and inorganic silicic acid compounds such as silicon dioxide.

[0048] The average particle size of the powder of component (A) is not particularly limited. However, when the powder dispersion of the present invention is used as a skin cosmetic, the average particle size is preferably 0.001 μm to 200 μm, more preferably 0.01 μm to 50 μm, further preferably 0.02 μm to 20 μm, and further more preferably 0.05 μm to 15 μm, from the viewpoint of uniformly adhering to the papules, furrows, and pores of the skin to give a natural makeup feel.

[0049] In the present invention, for the average particle diameter of powder, electron microscope observation or laser diffraction / scattering method is used to measure by particle size distribution measuring instrument etc. Specifically, in the case of laser diffraction / scattering method, ethanol is used as dispersion medium, laser diffraction scattering type particle size distribution measuring instrument (for example, SEISHIN enterprise company system, LMS-350) is used to measure. In addition, in the case of hydrophobic treatment being carried out to powder, the average particle diameter and content of component (A) refer to the average particle diameter and quality including hydrophobic treatment agent.

[0050] The (A1) hydrophobic powder used in the present invention is an organic powder having hydrophobicity, or an organic powder or inorganic powder coated with an organic surface treatment agent and hydrophobized. Examples of the hydrophobic organic powder include organic powders such as silicone resin, polymethylsilsesquioxane, nylon powder, silk powder, urethane powder, and cellulose powder, and one or more of these can be used.

[0051] The powder used after the hydrophobic treatment is the above-mentioned surface-treated powder.

[0052] The (A2) hydrophilic powder used in the present invention is the above-mentioned inorganic powder having hydrophilicity, or inorganic powder or organic powder coated with a hydrophilic surface treatment agent to be hydrophilized.

[0053] Regarding the content of component (A) in the powder dispersion of the present invention, as long as the component (A) can exert its function, from the viewpoint of maintaining good dispersibility and dispersion stability, it is preferably 1% by mass or more, more preferably 3% by mass or more, and further preferably 5% by mass or more. In addition, from the viewpoint of maintaining good dispersibility and dispersion stability, it is preferably 60% by mass or less, more preferably 55% by mass or less, and further preferably 50% by mass or less. Specifically, it is preferably 1% by mass or more and 60% by mass or less, more preferably 3% by mass or more and 55% by mass or less, and further preferably 5% by mass or more and 50% by mass or less.

[0054] The component (B) used in the present invention may be a polymer having a monomer unit having an SP value of 8.6 or more, and may be a homopolymer or a copolymer, but is preferably a copolymer.

[0055] Regarding the component (B), it is preferred to use different copolymers according to the type of component (A). When component (A) is (A1) hydrophobic powder, component (B) is preferably (B1) selected from acrylic copolymers and silicone copolymers. One or more, and it is a copolymer having at least a monomer unit with an SP value less than 10.5 and a monomer unit with an SP value exceeding 10.5 and less than 14.5. Here, the SP value is a solubility parameter. It is believed that: by containing monomer units with low SP values ​​and monomer units with high SP values ​​by component (B1) copolymer, it is possible to suppress the occurrence of agglomeration and precipitation of (A1) hydrophobic powder in component (C) (volatile substances).

[0056] Regarding the acrylic copolymer, for example, there can be mentioned a copolymer having two or more monomer units selected from acrylic acid, methacrylic acid, acrylic ester, methacrylic ester, acrylamide and methacrylamide, wherein at least two of these monomer units possessed by the copolymer are a monomer unit having an SP value of less than 10.5 and a monomer unit having an SP value of more than 10.5 and less than 14.5.

[0057] Here, the above-mentioned SP value of the monomer units such as general acrylic acid, methacrylic acid, acrylic ester, methacrylic ester, etc. is less than 10.5. However, depending on the type of alcohol residues of acrylic ester and methacrylic ester, there are cases where the above-mentioned SP value is greater than 10.5. In addition, the above-mentioned SP value of acrylamide or methacrylamide monomer units mostly exceeds 10.5 and is less than 14.5. In addition, the above-mentioned SP value of the monomer unit having an N-acylalkyleneimine structure in the alcohol residue of acrylic ester or methacrylic ester, or in the amide residue of acrylamide or methacrylamide, mostly exceeds 10.5 and is less than 14.5. Therefore, component (B) of the present invention is more preferably an acrylic copolymer having an acrylamide, methacrylamide or N-acylalkyleneimine structure in its structure.

[0058] Specific examples thereof include (octylacrylamide / hydroxypropyl acrylate / butylaminoethyl methacrylate) copolymers, (alkyl acrylate·octylacrylamide) copolymers, and (acrylate / tert-butylacrylamide) copolymers.

[0059] Examples of the silicone copolymer include a copolymer having a polysiloxane skeleton and having at least one unit having an SP value of less than 10.5 and a unit having an SP value of more than 10.5 and less than 14.5 in a side chain.

[0060] Here, the SP value of a general siloxane unit is less than 10.5. In addition, as described above, the SP value of a monomer unit having an acrylamide structure, a methacrylamide structure or an N-acylalkyleneimine structure in a side chain of the siloxane skeleton is often greater than 10.5 and less than 14.5. Therefore, the component (B) of the present invention is more preferably a silicone copolymer having an acrylamide, a methacrylamide or an N-acylalkyleneimine structure in its structure.

[0061] Specific examples include poly(N-formylethyleneimine)organosiloxane, poly(N-acetylethyleneimine)organosiloxane, poly(N-propionylethyleneimine)organosiloxane, and the like. Poly(N-propionylethyleneimine)organosiloxane is preferred.

[0062] On the other hand, when the component (A) is the hydrophilic powder (A2), the component (B) is preferably a polymer (B2) having at least an SP value of 8.6 or more and not containing a monomer unit having a polyglycerol structure. It is considered that the polymer of the component (B2) having a monomer unit having an SP value of 8.6 or more (however, excluding a monomer unit having a polyglycerol structure) can suppress the aggregation and precipitation of the hydrophilic powder (A2) in the component (C) (volatile matter).

[0063] The polymer component (B2) is preferably soluble or dispersible in ethanol. The term "soluble or dispersible in ethanol" means that component (B2) is not visible in ethanol at 20°C and is in a transparent dispersed state within the preferred content range of the present invention.

[0064] The polymer of the component (B2) may be a homopolymer or a copolymer, and is preferably a copolymer having a monomer unit having an SP value of 8.6 or more.

[0065] The component (B2) copolymer is preferably one or more copolymers selected from acrylic copolymers, methacrylic copolymers, silicone copolymers and vinyl copolymers (excluding copolymers having a polyglycerol structure), and these copolymers have at least a monomer unit having an SP value of 8.6 or more.

[0066] The monomer unit having an SP value of 8.6 or more is more preferably a monomer unit having a structure selected from acrylamide, methacrylamide, an N-acylalkyleneimine structure, a betaine structure, a polyethylene structure, and a polypropylene structure.

[0067] Therefore, component (B2) is more preferably a copolymer of one or more selected from acrylic copolymers, methacrylic copolymers, silicone copolymers and vinyl copolymers, and these copolymers have monomer units containing a structure selected from acrylamide, methacrylamide, N-acylalkyleneimine structure, betaine structure, polyethylene structure and polypropylene structure.

[0068] Specifically, examples include (octylacrylamide / hydroxypropyl acrylate / butylaminoethyl methacrylate) copolymer, (alkyl acrylate·octylacrylamide) copolymer, (acrylate / tert-butylacrylamide) copolymer, PEG / PPG-20 / 22 butyl ether polydimethylsiloxane, (VA / crotonic acid / vinyl neodecanoate) copolymer, (methacrylate ethyl betaine / acrylate) copolymer, poly(N-formylethyleneimine)organosiloxane, poly(N-acetylethyleneimine)organosilicone Oxane, poly (N-propionylethyleneimine) organosiloxane, etc., preferably: (octylacrylamide / hydroxypropyl acrylate / butylaminoethyl methacrylate) copolymer, (alkyl acrylate·octylacrylamide) copolymer, (acrylate / tert-butylacrylamide) copolymer, PEG / PPG-20 / 22 butyl ether polydimethylsiloxane, (VA / crotonic acid / vinyl neodecanoate) copolymer, (methacrylate ethyl betaine / acrylate) copolymer, poly (N-propionylethyleneimine) organosiloxane.

[0069] Preferred embodiments of the powder dispersion of the present invention include the following embodiments.

[0070] (1) A powder dispersion comprising the following components (A1), (B1) and (C):

[0071] (A1) Hydrophobic powder,

[0072] (B1) a copolymer of one or more selected from acrylic copolymers and silicone copolymers, wherein the copolymer comprises at least a monomer unit having an SP value of less than 10.5 and a monomer unit having an SP value of more than 10.5 and less than 14.5, and

[0073] (C) one or more volatile substances selected from alcohols and ketones,

[0074] Furthermore, the mass ratio (A1) / (B1) of the component (A1) to the component (B1) is 5 or more and 200 or less.

[0075] (2) A powder dispersion comprising the following components (A2), (B2) and (C):

[0076] (A2) Hydrophilic powder,

[0077] (B2) a polymer having at least an SP value of 8.6 or more and not containing a monomer unit having a polyglycerol structure, and

[0078] (C) one or more volatile substances selected from alcohols and ketones,

[0079] Furthermore, the mass ratio (A2) / (B2) of the component (A2) to the component (B2) is 5 or more and 200 or less.

[0080] The content of component (B) in the powder dispersion of the present invention is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, and further preferably 0.5% by mass or more from the viewpoint of maintaining good dispersibility and dispersion stability of component (A) in the powder dispersion. In addition, from the viewpoint of maintaining good dispersibility and dispersion stability, it is preferably 20% by mass or less, more preferably 15% by mass or less, and further preferably 10% by mass or less. Specifically, it is preferably 0.1% by mass or more and 20% by mass or less, more preferably 0.2% by mass or more and 15% by mass or less, and further preferably 0.5% by mass or more and 10% by mass or less.

[0081] In the powder dispersion of the present invention, from the viewpoint of maintaining the dispersibility and dispersion stability of the component (A) in the powder dispersion well, the mass ratio (A) / (B) of the component (A) to the component (B) is preferably 5 or more and 200 or less. From the viewpoint of maintaining the above dispersibility and dispersion stability well, the mass ratio (A) / (B) is more preferably 6 or more, further preferably 7 or more, further more preferably 8 or more, and further more preferably 100 or less, further preferably 50 or less, further more preferably 40 or less. Specifically, it is more preferably 6 or more and 100 or less, further preferably 7 or more and 50 or less, further more preferably 8 or more and 40 or less.

[0082] The component (C) used in the powder dispersion of the present invention is one or more volatile substances selected from alcohols and ketones. Here, the so-called "volatile substance" refers to a substance that easily volatilizes into the atmosphere at normal temperature and pressure. Among them, regarding alcohols, it is preferred to use, for example: monovalent chain aliphatic alcohols, monovalent cyclic aliphatic alcohols, and monovalent aromatic alcohols. Regarding monovalent chain aliphatic alcohols, for example, C1-C6 alcohols can be mentioned; regarding monovalent cyclic alcohols, for example, C4-C6 cyclic alcohols can be mentioned; regarding monovalent aromatic alcohols, for example, benzyl alcohol, phenylethyl alcohol, etc. can be mentioned. Regarding specific examples of these, for example: ethanol, isopropanol, butanol, phenylethyl alcohol, n-propanol, n-pentanol, etc. can be mentioned. Regarding these alcohols, one or more selected from these can be used. Among the volatile substances of component (C), the alcohol does not contain polyhydric alcohols belonging to polyvalent alcohols.

[0083] Among the volatile substances of component (C), ketones include, for example, di-C1-C4 alkyl ketones (for example, acetone, methyl ethyl ketone, methyl isobutyl ketone, etc.) These ketones may be used alone or in combination of two or more.

[0084] The volatile substance as component (C) is more preferably one or more selected from ethanol, isopropanol and butanol, further preferably one or more selected from ethanol and butanol, and further more preferably contains at least ethanol.

[0085] The content of component (C) in the powder dispersion of the present invention is preferably 35% by mass or more, more preferably 40% by mass or more, and further preferably 45% by mass or more from the viewpoint of maintaining the dispersibility and dispersion stability of component (A) in the powder dispersion. In addition, it is preferably 95% by mass or less, more preferably 93% by mass or less, further preferably 92% by mass or less, and further more preferably 85% by mass or less. Specifically, the content of component (C) is preferably 35% by mass or more and 95% by mass or less, more preferably 40% by mass or more and 93% by mass or less, and further preferably 45% by mass or more and 92% by mass or less.

[0086] When the component (D) described later is contained, the content of the component (C) in the powder dispersion is preferably 85% by mass or less.

[0087] In addition, the volatile matter of component (C) preferably contains ethanol, and in this case, the content of ethanol is preferably 50% by mass or more, more preferably 65% ​​by mass or more, and further preferably 80% by mass or more, and further preferably 100% by mass or less, relative to the total amount of the volatile matter of component (C). The content of ethanol is preferably 50% by mass or more and 100% by mass or less, more preferably 65% ​​by mass or more and 100% by mass or less, and further preferably 80% by mass or more and 100% by mass or less, relative to the total amount of the volatile matter of component (C).

[0088] One embodiment of the powder dispersion of the present invention includes a powder dispersion containing, in addition to the above-mentioned components (A), (B) and (C), a component (D) of a polymer having fiber-forming ability.

[0089] That is, one embodiment of the present invention is a powder dispersion containing the following components (A), (B), (C), and (D):

[0090] (A) Powder,

[0091] (B) a polymer having a monomer unit having an SP value of 8.6 or more,

[0092] (C) one or more volatile substances selected from alcohols and ketones, and

[0093] (D) a polymer having fiber-forming ability,

[0094] Furthermore, the mass ratio (A) / (B) of the component (A) to the component (B) is 5 or more and 200 or less.

[0095] In addition, a preferred embodiment is the following powder dispersion.

[0096] (1) A powder dispersion comprising the following components (A1), (B1), (C) and (D):

[0097] (A1) Hydrophobic powder,

[0098] (B1) a copolymer of one or more selected from acrylic copolymers and silicone copolymers, wherein the copolymer comprises at least a monomer unit having an SP value of less than 10.5 and a monomer unit having an SP value of more than 10.5 and less than 14.5,

[0099] (C) one or more volatile substances selected from alcohols and ketones, and

[0100] (D) a polymer having fiber-forming ability,

[0101] Furthermore, the mass ratio (A1) / (B1) of the component (A1) to the component (B1) is 5 or more and 200 or less.

[0102] (2) A powder dispersion comprising the following components (A2), (B2), (C) and (D):

[0103] (A2) Hydrophilic powder,

[0104] (B2) a polymer having at least an SP value of 8.6 or more and containing no monomer unit having a polyglycerol structure,

[0105] (C) one or more volatile substances selected from alcohols and ketones, and

[0106] (D) a polymer having fiber-forming ability,

[0107] Furthermore, the mass ratio (A2) / (B2) of the component (A2) to the component (B2) is 5 or more and 200 or less.

[0108] The powder dispersion is useful as a powder dispersion for skin, i.e., a skin cosmetic, and is further useful as a film-forming composition for forming a film composed of a deposit of fibers containing component (D) as a main component on the skin by electrostatic spraying. In addition, the electrostatic spraying method is preferably an electrostatic spinning method. In addition, the composition used in the electrostatic spraying can be referred to as a "spraying composition" or a "spinning composition". "Spraying" includes not only the case of spraying in a mist form, but also the case of applying an electric charge to extend the discharged liquid and discharge it in a fibrous form.

[0109] The fiber-forming polymer of component (D) used here is a substance that is soluble in the volatile substance of component (C) and is a polymer that is capable of forming fibers when subjected to electrostatic spraying. In other words, it is a component that becomes a constituent component of continuous fibers and a polymer that becomes a main component of fibers. Here, "dissolved" means that it is in a dispersed state at 20°C, and the dispersed state is observed to be uniform, preferably transparent or translucent.

[0110] In addition, as mentioned above, the copolymer of component (B) prevents the hydrophobic powder from agglomerating and precipitating in the powder dispersion by interacting with the hydrophobic powder of component (A), and is not a component having fiber-forming ability when the powder dispersion is electrostatically sprayed. Here, component (D) is a polymer other than component (B).

[0111] As (D) a polymer having fiber-forming ability, an appropriate polymer can be used according to the properties of the volatile substance of component (C). Specifically, polymers having fiber-forming ability can be roughly divided into water-soluble polymers and water-insoluble polymers. In this specification, the so-called "water-soluble polymer" refers to a polymer having the following properties: under an environment of 1 atmosphere and 23°C, after weighing 1 g of the polymer, it is immersed in 10 g of ion exchange water, and after 24 hours, more than 0.5 g of the immersed polymer is dissolved in water. On the other hand, in this specification, the so-called "water-insoluble polymer" refers to a polymer having the following properties: under an environment of 1 atmosphere and 23°C, after weighing 1 g of the polymer, it is immersed in 10 g of ion exchange water, and after 24 hours, more than 0.5 g of the immersed polymer is not dissolved.

[0112] Examples of water-soluble polymers having fiber-forming ability include: pullulan, hyaluronic acid, chondroitin sulfate, poly-γ-glutamic acid, modified corn starch, β-glucan, oligosaccharide, heparin, keratan sulfate and other mucopolysaccharides; cellulose, pectin, xylan, lignin, glucomannan, galacturonic acid, psyllium seed gum, tamarind gum, gum arabic, tragacanth gum, soybean water-soluble polysaccharides, alginic acid, carrageenan, laminarin, agarose, fucoidan sulfate, methylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose and other natural polymers; partially saponified polyvinyl alcohol (when not used in combination with a crosslinking agent), polyvinyl pyrrolidone (PVP), polyethylene oxide, sodium polyacrylate and other synthetic polymers, etc. These water-soluble polymers may be used alone or in combination of two or more. Among these water-soluble polymers, from the viewpoint of easily manufacturing a film composed of fiber deposits by electrostatic spraying, pullulan, partially saponified polyvinyl alcohol, polyvinyl pyrrolidone and synthetic polymers such as polyethylene oxide are preferably used. When polyethylene oxide is used as the water-soluble polymer, its number average molecular weight is preferably 50,000 to 3,000,000, and more preferably 100,000 to 2,500,000.

[0113] On the other hand, examples of water-insoluble polymers capable of forming fibers include: fully saponified polyvinyl alcohol that can be insolubilized after forming a film composed of fiber deposits; partially saponified polyvinyl alcohol that can be cross-linked after the film is formed by using a cross-linking agent; and polyesters such as polyvinyl acetal diethylaminoacetate, zein (the main component of zein), and polylactic acid (PLA); polyacrylonitrile resins; polyacrylic resins other than component (B) such as polymethacrylic resins; polystyrene resins, polyvinyl butyral resins, polyethylene terephthalate resins, polybutylene terephthalate resins, polyurethane resins, polyamide resins, polyimide resins, and polyamide-imide resins. These water-insoluble polymers can be used alone or in combination of two or more.

[0114] Among these water-insoluble polymers, it is preferred to use one or more selected from partially saponified polyvinyl alcohol, completely saponified polyvinyl alcohol, polyvinyl butyral resin, polyurethane resin, polyacrylic acid resin other than component (B), polymethacrylic acid resin other than component (B), polyvinyl acetal diethylaminoacetate and polylactic acid. It is more preferred to use one or more selected from polyvinyl butyral resin, polymethacrylic acid resin other than component (B) and polyurethane resin. It is further preferred to contain polyvinyl butyral resin. It is even more preferred to contain polyvinyl butyral resin as the main component.

[0115] Regarding the content of component (D) in the powder dispersion of the present invention, from the viewpoint of making the above-mentioned dispersibility and dispersion stability good, the viewpoint of the formation of the film composed of the fiber-containing deposit when electrostatic spraying is performed, and the color development of the formed film is improved, and the viewpoint of suppressing makeup removal is preferably 1% by mass or more, more preferably 4% by mass or more, further preferably 5% by mass or more, and further more preferably 6% by mass or more. In addition, it is preferably 45% by mass or less, more preferably 35% by mass or less, further preferably 30% by mass or less, and further more preferably 20% by mass or less. Specifically, the content of component (D) is preferably 1% by mass or more and 45% by mass or less, more preferably 4% by mass or more and 35% by mass or less, further preferably 5% by mass or more and 30% by mass or less, and further more preferably 6% by mass or more and 20% by mass or less.

[0116] The mass ratio of component (D) to component (B) and the content ratio of component (D) to component (B) ((D) / (B)) in the powder dispersion of the present invention are preferably 1 to 40, more preferably 2 to 30, further preferably 3 to 20, and still further preferably 4 to 15, from the viewpoints of the above-mentioned dispersibility and dispersion stability and the viewpoint of forming a coating film uniformly supporting the powder.

[0117] The powder dispersion is useful as a powder dispersion for skin, that is, a skin cosmetic, and is particularly useful as a film-forming composition for forming a film composed of fiber-containing deposits on the skin by electrostatic spraying.

[0118] That is, one embodiment of the present invention is a film-forming composition for forming a film composed of fiber-containing deposits on the skin by electrostatically spraying a powder dispersion, wherein the powder dispersion contains the following components (A), (B), (C), and (D):

[0119] (A) Powder,

[0120] (B) a polymer having a monomer unit having an SP value of 8.6 or more,

[0121] (C) one or more volatile substances selected from alcohols and ketones, and

[0122] (D) a polymer having fiber-forming ability,

[0123] Furthermore, the mass ratio (A) / (B) of the component (A) to the component (B) is 5 or more and 200 or less.

[0124] Moreover, one preferred embodiment thereof is the following film-forming composition.

[0125] (1) A film-forming composition for forming a film composed of fiber-containing deposits on the skin by electrostatic spraying of a powder dispersion, the powder dispersion containing the following components (A1), (B1), (C) and (D):

[0126] (A1) Hydrophobic powder,

[0127] (B1) a copolymer of one or more selected from acrylic copolymers and silicone copolymers, wherein the polymer has at least a monomer unit having an SP value of less than 10.5 and a monomer unit having an SP value of more than 10.5 and less than 14.5,

[0128] (C) one or more volatile substances selected from alcohols and ketones, and

[0129] (D) a polymer having fiber-forming ability,

[0130] Furthermore, the mass ratio (A1) / (B1) of the component (A1) to the component (B1) is 5 or more and 200 or less.

[0131] (2) A film-forming composition for forming a film composed of fiber-containing deposits on the skin by electrostatically spraying a powder dispersion, the powder dispersion comprising (A2), (B2), (C) and (D):

[0132] (A2) hydrophilic powder;

[0133] (B2) a polymer having at least an SP value of 8.6 or more and containing no monomer unit having a polyglycerol structure,

[0134] (C) one or more volatile substances selected from alcohols and ketones, and

[0135] (D) a polymer having fiber-forming ability,

[0136] Furthermore, the mass ratio (A2) / (B2) of the component (A2) to the component (B2) is 5 or more and 200 or less.

[0137] When the powder dispersion of the present invention is used as a film-forming composition, the content of component (A) in the composition is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, and further preferably 0.5% by mass or more, from the viewpoint of maintaining the above-mentioned dispersibility and dispersion stability, allowing the hydrophobic powder to be uniformly carried in the film composed of the fiber-containing deposit formed by electrostatic spraying, and the color development of the film, and the viewpoint of suppressing makeup removal. In addition, from the viewpoint of maintaining the above-mentioned dispersibility and dispersion stability, allowing the hydrophobic powder to be uniformly carried in the film composed of the fiber-containing deposit formed by electrostatic spraying, and the color development of the film, and the viewpoint of suppressing makeup removal, it is preferably 20% by mass or less, more preferably 10% by mass or less, and further preferably 5% by mass or less. Specifically, it is preferably 0.01% by mass or more and 20% by mass or less, more preferably 0.1% by mass or more and 10% by mass or less, and further preferably 0.5% by mass or more and 5% by mass or less.

[0138] When the powder dispersion of the present invention is used as a film-forming composition, the content of component (B) in the composition is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, and further preferably 0.04% by mass or more, from the viewpoint of maintaining the above-mentioned dispersibility and dispersion stability, allowing the hydrophobic powder to be uniformly carried in the film composed of the deposit containing fiber pile formed by electrostatic spraying, and the color development of the film, and the viewpoint of suppressing makeup removal. In addition, from the viewpoint of maintaining the above-mentioned dispersibility and dispersion stability, allowing the hydrophobic powder to be uniformly carried in the film composed of the deposit containing fiber formed by electrostatic spraying, and the color development of the film, and the viewpoint of suppressing makeup removal, it is preferably 3% by mass or less, more preferably 2% by mass or less, and further preferably 0.5% by mass or less. Specifically, it is preferably 0.01% by mass or more and 3% by mass or less, more preferably 0.02% by mass or more and 2% by mass or less, and further preferably 0.04% by mass or more and 0.5% by mass or less.

[0139] When the powder dispersion of the present invention is used as a film-forming composition, the content of component (C) in the composition is preferably 45% by mass or more, more preferably 50% by mass or more, and further preferably 55% by mass or more, from the viewpoint of maintaining the above-mentioned dispersibility and dispersion stability, allowing the hydrophobic powder to be uniformly carried in the film composed of the fiber-containing deposit formed by electrostatic spraying, and the color development of the film, and the viewpoint of suppressing makeup removal. In addition, from the viewpoint of maintaining the above-mentioned dispersibility and dispersion stability, allowing the hydrophobic powder to be uniformly carried in the film composed of the fiber-containing deposit formed by electrostatic spraying, and the color development of the film, and the viewpoint of suppressing makeup removal, it is preferably 95% by mass or less, more preferably 92% by mass or less, more preferably 90% by mass or less, and further preferably 85% by mass or less. Specifically, it is preferably 45% by mass or more and 95% by mass or less, more preferably 50% by mass or more and 92% by mass or less, and further preferably 55% by mass or more and 90% by mass or less.

[0140] When the powder dispersion of the present invention is used as a film-forming composition, the content of component (D) in the composition is preferably 3% by mass or more, more preferably 4% by mass or more, more preferably 5% by mass or more, and more preferably 6% by mass or more, from the perspective of stably forming a fiber-containing deposit formed by electrostatic spraying, and improving the color development of the formed film and inhibiting makeup removal. In addition, it is preferably 45% by mass or less, more preferably 35% by mass or less, more preferably 30% by mass or less, and more preferably 20% by mass or less. Specifically, the content of component (D) is preferably 3% by mass or more and 45% by mass or less, more preferably 4% by mass or more and 35% by mass or less, more preferably 5% by mass or more and 30% by mass or less, and more preferably 6% by mass or more and 20% by mass or less.

[0141] Regarding the content ratio ((D) / (C)) of component (C) to component (D) in the film-forming composition of the present invention, from the viewpoint of stably forming a fiber-containing deposit formed by electrostatic spraying, it is preferably from 0.04 to 0.6, more preferably from 0.05 to 0.5, further preferably from 0.06 to 0.4, and further more preferably from 0.08 to 0.3.

[0142] In addition, from the viewpoint of stably forming a fiber-containing deposit formed by electrostatic spraying, the content ratio of ethanol (C1) to component (D) in the film-forming composition ((D) / (C1)) is preferably from 0.04 to 0.6, more preferably from 0.05 to 0.5, further preferably from 0.06 to 0.4, and further more preferably from 0.08 to 0.3.

[0143] The mass ratio (D) / (B) of component (D) to component (B) in the film-forming composition of the present invention is preferably 20 to 500, more preferably 30 to 250, and even more preferably 40 to 200, from the viewpoint of uniformly carrying the powder on the film composed of the fiber-containing deposit formed by electrostatic spraying, improving the color of the film on the skin, and inhibiting makeup removal over time.

[0144] When the powder dispersion of the present invention is used as a powder dispersion for skin and a film-forming composition, the powder dispersion may contain an oily agent. The oily agent is an oily agent that can be formulated into cosmetics, and the purpose of formulation is to form a uniform cosmetic film containing component (A) and component (D) on the skin.

[0145] As the oil agent, a polar oil that is liquid at 20° C. is preferably used, and examples thereof include hydrocarbon oil, ester oil, ether oil, higher alcohol, and silicone oil. One type or a combination of two or more types may be used.

[0146] Examples of the hydrocarbon oil include liquid paraffin, squalane, squalene, liquid isoparaffin, n-octane, n-heptane, cyclohexane, and light isoparaffin. From the perspective of feel and adhesion, liquid paraffin and squalane are preferred. From the perspective of making the film formed by electrostatic spraying adhere evenly to the skin and suppressing color unevenness, isododecane, isohexadecane, and hydrogenated polyisobutene having a viscosity of less than 10 mPa·s at 30° C. are preferred.

[0147] The viscosity was measured at 30° C. using a B-type viscometer (TVB-10 model, manufactured by Toki Sangyo Co., Ltd., measurement conditions: rotor No. 1, 60 rpm, 1 minute).

[0148] The ester oils include, for example, esters formed from straight-chain or branched fatty acids and straight-chain or branched alcohols or polyols. Specifically, for example, isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, 12-hydroxystearate cholesterol, ethylene di(2-ethylhexanoate), dipentaerythritol fatty acid esters, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, di(2 -heptyl undecanoate) glyceryl, tri(2-ethylhexanoate) trimethylolpropane, triisostearate trimethylolpropane, pentaerythritol tetra(2-ethylhexanoate), tri(2-ethylhexanoate) glyceryl, triisostearate trimethylolpropane, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, diethylhexyl naphthalene dicarboxylate, alkyl benzoate (carbon number 12-15), cetearyl isononanoate, tri(caprylic acid / capric acid) glyceryl, butylene glycol (dicaprylic acid / capric acid), trilaurin, trimyristin, tripalmitin, Glyceryl triisostearate, tri(2-heptylundecanoic acid)glyceryl, tribehenate, tri(coconut oil fatty acid)glyceryl, castor oil fatty acid methyl ester, oleyl oleate, 2-heptylundecyl palmitate, diisobutyl adipate, 2-octyldodecyl N-lauroyl-L-glutamate, di(2-heptylundecyl) adipate, ethyl laurate, di(2-ethylhexyl) sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, di(2-ethylhexyl) succinate In some embodiments, the present invention may be used in combination with any of the foregoing inventions and / or any of the foregoing inventions. The foregoing invention may be used in combination with any of the foregoing inventions and / or any of the foregoing inventions. The foregoing invention may be used in combination with any of the foregoing inventions and / or any of the foregoing inventions. The foregoing invention may be used in combination with any of the foregoing inventions and / or any of the foregoing inventions.

[0149] Among these, octyldodecyl myristate, myristyl myristate, isocetyl stearate, isocetyl isostearate, cetearyl isononanoate, diisobutyl adipate, di(2-ethylhexyl) sebacate, isopropyl myristate, isopropyl palmitate, diisostearyl malate, neopentyl glycol dicaprate, benzoic acid (C12-15) alkyl esters, tri(caprylic acid / capric acid)glyceryl, di(phytosteryl / octyldodecanol) lauroyl glutamate, dipentaerythritol tri(polyhydroxystearic acid), dipentaerythritol pentaisostearate, dipentaerythritol tetraisostearate, (behenic acid / The present invention further comprises at least one or more selected from pentaerythritol (polyhydroxystearic acid) esters, more preferably at least one or more selected from isopropyl myristate, isopropyl palmitate, diisostearyl malate, neopentyl glycol dicaprate, benzoic acid (carbon number 12 to 15) alkyl esters, tri(caprylic acid / capric acid)glyceryl, di(phytosteryl / octyldodecanol) lauroyl glutamate, dipentaerythritol tri(polyhydroxystearic acid), dipentaerythritol pentaisostearate, dipentaerythritol tetraisostearate, and pentaerythritol (behenic acid / polyhydroxystearic acid) esters, and further preferably at least one or more selected from neopentyl glycol dicaprate, diisostearyl malate, tri(caprylic acid / capric acid)glyceryl, and di(phytosteryl / octyldodecanol) lauroyl glutamate.

[0150] Examples of the ether oil include cetyl-1,3-dimethylbutyl ether, dioctyl ether, dilauryl ether, and diisostearyl ether.

[0151] Examples of the higher alcohol include liquid higher alcohols having 12 to 20 carbon atoms, preferably branched or unsaturated higher alcohols, and specific examples thereof include isostearyl alcohol, oleyl alcohol, octyldodecanol, and the like.

[0152] Examples of the silicone oil include dimethylpolysiloxane, dimethylcyclopolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, and higher alcohol-modified organopolysiloxane. From the viewpoint of making the film composed of the fiber-containing deposit formed by electrostatic spraying adhere to the skin, it is preferred that at least dimethylpolysiloxane is contained.

[0153] The kinematic viscosity of the silicone oil at 25° C. is preferably 1 mm / s from the viewpoint of making the film composed of the fiber-containing deposit formed by electrostatic spraying adhere to the skin. 2 / s or more, more preferably 1.5 mm 2 / s or more, more preferably 2 mm 2 / s or more, preferably 30mm 2 / s or less, more preferably 20 mm 2 / s or less, more preferably 10 mm 2 / s or less.

[0154] The content of the above-mentioned oil agent is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, further preferably 1% by mass or more, and further preferably 3% by mass or more in the film-forming composition, from the viewpoint of making the film composed of the fiber-containing deposit formed by electrostatic spraying adhere evenly to the skin and improving the color development of the film. It is also preferably 30% by mass or less, more preferably 25% by mass or less, further preferably 18% by mass or less, and further more preferably 15% by mass or less.

[0155] In addition, from the viewpoint of making the film composed of the fiber-containing deposit formed by electrostatic spraying adhere evenly to the skin and improving the color development of the film, the mass ratio of the above-mentioned oil agent to the component (D) in the film-forming composition (oil agent / (D)) is preferably 0.02 or more, more preferably 0.05 or more, further preferably 0.2 or more, further more preferably 0.5 or more, and is preferably 8 or less, more preferably 6 or less, further preferably 3 or less, further more preferably 1.5 or less.

[0156] The powder dispersion of the present invention (especially the powder dispersion for skin, especially the film-forming composition) may contain a polyol. The so-called "polyol" refers to an aliphatic compound having two or more hydroxyl groups. The polyol is preferably a polyol that is liquid at 20°C. Specifically, examples include: ethylene glycol, propylene glycol, 1,3-propanediol, 1,3-butanediol and other alkanediols; diethylene glycol, dipropylene glycol, polyethylene glycol with a molecular weight of less than 1000, polypropylene glycol and other polyalkylene glycols; glycerols such as glycerol, diglycerol, triglycerol, etc. Among these, from the viewpoint of making the film composed of the fiber-containing deposit formed by electrostatic spraying evenly adhere to the skin and improving the color development of the film, ethylene glycol, propylene glycol, 1,3-butylene glycol, dipropylene glycol, polyethylene glycol with a molecular weight of 1000 or less, glycerol, and diglycerol are preferred, and polyethylene glycol, propylene glycol, 1,3-butylene glycol, and glycerol with a molecular weight of 1000 or less are more preferred, and polyethylene glycol with a molecular weight of 1000 or less is further preferred. The polyol content in the film-forming composition is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, and further preferably 1% by mass or more, and is preferably 12% by mass or less, more preferably 8% by mass or less, and further preferably 5% by mass or less.

[0157] In addition, from the viewpoint of making the film composed of the fiber-containing deposit formed by electrostatic spraying adhere evenly to the skin and improving the color development of the film, the mass ratio of the content of the above-mentioned polyol to the component (D) in the film-forming composition (polyol / (D)) is preferably 0.02 or more, more preferably 0.05 or more, and further preferably 0.2 or more, and is preferably 3 or less, more preferably 2 or less, and further preferably 1 or less.

[0158] The powder dispersion of the present invention may further contain other ingredients in addition to the above ingredients. Regarding other ingredients, in addition to the above oil, for example: a plasticizer of a polymer having fiber-forming ability for component (D), a surfactant, a fragrance, an insect repellent, an antioxidant, a stabilizer, a preservative, various vitamins, etc.

[0159] When a powder dispersion containing components (A), (B), (C) and (D) is electrostatically sprayed onto an object to be coated, a coating composed of a deposit containing fibers can be formed on the surface.

[0160] That is, one embodiment of the present invention is a method for producing a film, wherein a film composed of a deposit containing fibers is formed on a surface of a film-forming object using a powder dispersion containing the following components (A), (B), (C), and (D):

[0161] (A) Powder,

[0162] (B) a polymer having a monomer unit having an SP value of 8.6 or more,

[0163] (C) one or more volatile substances selected from alcohols and ketones, and

[0164] (D) a polymer having fiber-forming ability,

[0165] Furthermore, the mass ratio (A) / (B) of the component (A) to the component (B) is 5 or more and 200 or less.

[0166] One preferred embodiment thereof is the following.

[0167] (1) A method for producing a coating, wherein:

[0168] A film composed of a fiber-containing deposit is formed on the surface of an object to be coated using a powder dispersion containing the following components (A1), (B1), (C) and (D):

[0169] (A1) Hydrophobic powder,

[0170] (B1) a copolymer of one or more selected from acrylic copolymers and silicone copolymers, wherein the copolymer comprises at least a monomer unit having an SP value of less than 10.5 and a monomer unit having an SP value of more than 10.5 and less than 14.5,

[0171] (C) one or more volatile substances selected from alcohols and ketones, and

[0172] (D) a polymer having fiber-forming ability,

[0173] Furthermore, the mass ratio (A1) / (B1) of the component (A1) to the component (B1) is 5 or more and 200 or less.

[0174] (2) A method for producing a coating, wherein a coating composed of a deposit containing fibers is formed on a surface of an object to be coated using a powder dispersion, the powder dispersion containing the following components (A2), (B2), (C) and (D):

[0175] (A2) Hydrophilic powder,

[0176] (B2) a polymer having at least an SP value of 8.6 or more and containing no monomer unit having a polyglycerol structure,

[0177] (C) one or more volatile substances selected from alcohols and ketones, and

[0178] (D) a polymer having fiber-forming ability,

[0179] Furthermore, the mass ratio (A2) / (B2) of the component (A2) to the component (B2) is 5 or more and 200 or less.

[0180] Here, the object to be formed with the film is not limited to a substrate such as a resin or metal, but also includes skin. Therefore, one embodiment includes a method for producing a cosmetic film, characterized in that the powder dispersion is electrostatically sprayed directly onto the skin, thereby forming a cosmetic film composed of a fiber-containing deposit on the skin surface.

[0181] When the electrostatic spray method is implemented, a film-forming composition having a viscosity at 25°C of preferably 1 mPa·s or more, more preferably 10 mPa·s or more, and further preferably 50 mPa·s or more is used. In addition, a film-forming composition having a viscosity at 25°C of preferably 5000 mPa·s or less, more preferably 2000 mPa·s or less, and further preferably 1500 mPa·s or less is used. The viscosity of the film-forming composition at 25°C is preferably 1 mPa·s or more and 5000 mPa·s or less, more preferably 10 mPa·s or more and 1500 mPa·s or less, and further preferably 50 mPa·s or more and 1200 mPa·s or less. By using a film-forming composition having a viscosity within this range, a porous film containing a powder, especially a porous film composed of a deposit of fibers containing a powder, can be smoothly formed by an electrostatic spray method. From the perspectives of uniform adhesion of the powder-containing film to the skin mounds, skin grooves, and capillaries, as well as improved color development, prevention of makeup removal, and film adhesion, it is advantageous to form a porous film containing powder. The viscosity of the film-forming composition is measured at 25° C. using an E-type viscometer. For example, an E-type viscometer manufactured by Tokyo Keiki Co., Ltd. can be used. As a rotor at this time, rotor No. 43 can be used.

[0182] The film-forming composition is sprayed or spit directly toward the film-forming object (for example, the part of the human skin where makeup is to be applied using powder) by electrostatic spraying. In addition, the film-forming composition is sprayed or spit onto the film-forming object, for example, the surface of a resin substrate, etc. by electrostatic spraying. The electrostatic spraying method includes: using an electrostatic spray device, electrostatically spraying the film-forming composition toward the skin. The electrostatic spray device basically includes: a container for storing the above-mentioned composition, a nozzle for spitting out the above-mentioned composition, a supply device for supplying the above-mentioned composition stored in the above-mentioned container to the above-mentioned nozzle, and a power supply for applying voltage to the above-mentioned nozzle.

[0183] Figure 1 This is a schematic diagram showing the structure of an electrostatic spray device that is suitably used in the present invention. The electrostatic spray device 10 shown in the figure is equipped with a low-voltage power supply 11. The low-voltage power supply 11 can generate a voltage of several V to more than ten V. In order to improve the portability of the electrostatic spray device 10, the low-voltage power supply 11 is preferably composed of one or more batteries. As batteries, various batteries such as dry cells, rechargeable batteries, and storage batteries can be used. In addition, by using batteries as the low-voltage power supply 11, there is also the advantage of being able to be easily replaced as needed. Instead of batteries, an AC adapter or the like can be used as the low-voltage power supply 11.

[0184] The electrostatic spray device 10 further includes a high voltage power supply 12. The high voltage power supply 12 is connected to the low voltage power supply 11 and includes a circuit (not shown) for boosting the voltage generated by the low voltage power supply 11 to a high voltage. The boost circuit is generally composed of transistors, capacitors, semiconductor elements, and the like.

[0185] The electrostatic spray device 10 is further provided with an auxiliary circuit 13. The auxiliary circuit 13 is between the above-mentioned low-voltage power supply 11 and the high-voltage power supply 12, and has the function of adjusting the voltage of the low-voltage power supply 11 so that the high-voltage power supply 12 can work stably. In addition, the auxiliary circuit 13 has the function of controlling the rotation speed of the motor possessed by the micro gear pump 14 described later. The supply amount of the spray composition from the film-forming composition container 15 described later toward the micro gear pump 14 is controlled by controlling the rotation speed of the motor. A switch SW is installed between the auxiliary circuit 13 and the low-voltage power supply 11, and the electrostatic spray device 10 can be operated / stopped by turning on / off the switch SW. In addition, for the supply of the spray composition and the control of the supply amount, as long as a pump is used, a piston pump can also be used in addition to the micro gear pump 14.

[0186] The electrostatic spray device 10 further includes a nozzle 16. The nozzle 16 is composed of various conductors represented by metal or non-conductors such as plastics, rubber, and ceramics, and is formed into a shape that can spit out the spray composition from the front end. A small space is formed in the nozzle 16 along the long side direction of the nozzle 16 to allow the film-forming composition to flow. The cross-sectional size of the small space is represented by a diameter, preferably 100 μm or more and 1000 μm or less.

[0187] The nozzle 16 is connected to the micro gear pump 14 via a pipe 17. The pipe 17 may be a conductor or a non-conductor. In addition, the nozzle 16 is electrically connected to the high voltage power supply 12. Thus, a high voltage can be applied to the nozzle 16. In this case, in order to prevent a large current from flowing when the nozzle 16 directly touches the human body, the nozzle 16 is electrically connected to the high voltage power supply 12 via a current limiting resistor 19.

[0188] The micro gear pump 14 connected to the nozzle 16 via the pipe 17 has a function as a supply device for supplying the film-forming composition contained in the container 15 to the nozzle 16. The micro gear pump 14 receives power supply from the low voltage power supply 11 and operates. In addition, the micro gear pump 14 is configured to receive control from the auxiliary circuit 13 and supply a predetermined amount of the film-forming composition to the nozzle 16.

[0189] The micro gear pump 14 is connected to the container 15 via a flexible tube 18. The film-forming composition is stored in the container 15. The container 15 is preferably a replaceable cassette.

[0190] The electrostatic spray device 10 having the above structure can be used, for example, Figure 2 Use as shown. Figure 2 The electrostatic spray device 10 shown in the figure is a handheld electrostatic spray device 10 having a size that can be held in one hand. Figure 1 All components of the structure shown in the figure are housed in a cylindrical frame 20. A nozzle (not shown) is disposed at one end 10a in the long side direction of the frame 20. The nozzle is disposed in the frame 20 so that the blowing direction of the composition is consistent with the longitudinal direction of the frame 20 and is convex toward the skin side. By configuring the nozzle so that the front end is convex toward the skin in the longitudinal direction of the frame 20, the film-forming composition is not easily attached to the frame, and a film can be stably formed.

[0191] When the electrostatic spray device 10 is in operation, the user (i.e., a person who wants to form a film on the skin where powder makeup is applied using electrostatic spray) holds the device 10 in his hand and points one end 10a of the device 10 equipped with a nozzle (not shown) toward the application area where the electrostatic spray is to be applied. Figure 2 The electrostatic spray device 10 is shown in a state where one end 10a is directed toward the inner side of the user's forearm. In this state, the device 10 is turned on to perform the electrostatic spray method. When the device 10 is powered on, an electric field is generated between the nozzle and the skin. Figure 2 In the embodiment shown, a positive high voltage is applied to the nozzle, and the skin becomes a negative electrode. When an electric field is generated between the nozzle and the skin, the film-forming composition at the front end of the nozzle is polarized by electrostatic induction, so that the front end portion is formed into a cone, and the charged film-forming composition droplets are spit into the air from the front end of the cone along the electric field toward the skin. The solvent, i.e., component (a), continues to evaporate from the charged film-forming composition spitted into the space, and the charge density on the surface of the spray composition becomes excessive, while the Coulomb repulsion is repeatedly miniaturized, while expanding in the space, and reaching the skin. In this case, by appropriately adjusting the viscosity of the film-forming composition, the sprayed composition can be made to reach the application site in a droplet state. Alternatively, it can also be: during the spitting into the space, the solvent, i.e., the volatile substance, is volatilized from the droplets, while the solute, i.e., the polymer with fiber-forming ability, is solidified, while the potential difference is used to stretch and deform it to form fibers, and the fibers are deposited at the application site. For example, if the viscosity of the film-forming composition is increased, the composition can be easily deposited in the form of fibers on the application site. Thus, a porous film composed of fiber deposits is formed on the surface of the application site. A porous film composed of fiber deposits containing powder can also be formed by adjusting the distance between the nozzle and the skin, or adjusting the voltage applied to the nozzle.

[0192] When applying voltage to the nozzle in the electrostatic spray device, for example, an electrode may be arranged inside the nozzle or on a part of the nozzle. From the viewpoint of forming fibers containing powder, the voltage applied to the nozzle is preferably 5 kV or more and 30 kV or less, more preferably 7 kV or more and 20 kV or less, and further preferably 8 kV or more and 16 kV or less.

[0193] From the viewpoint of the formability of the fiber containing the powder, the flow rate of the film-forming composition sprayed (ejected) from the nozzle is preferably 0.4 mL / h or more and 30 mL / h or less, more preferably 0.8 mL / h or more and 20 mL / h or less, and further preferably 1.2 mL / h or more and 15 mL / h or less. In addition, from the viewpoint of good fiber formability, the ratio (F / P) of the voltage P (kV) applied to the nozzle and the flow rate F (mL / h) of the film-forming composition ejected from the nozzle is preferably 0.06 or more and 1.2 or less, more preferably 0.1 to 1, and further preferably 0.2 to 0.8.

[0194] During the electrostatic spraying process, a high potential difference is generated between the nozzle and the skin. However, because the impedance is very large, the current flowing in the human body is extremely small. The inventors have confirmed that the current flowing in the human body during the electrostatic spraying process is several orders of magnitude smaller than the current flowing in the human body due to static electricity generated in daily life.

[0195] When the deposit of powder-containing fibers is formed by electrostatic spraying, the thickness of the fibers is preferably 10 nm or more, more preferably 50 nm or more, when expressed as an equivalent circle diameter. In addition, it is preferably 3000 nm or less, more preferably 1500 nm or less. The thickness of the fibers can be measured by, for example, observing them with a scanning electron microscope (SEM), magnifying them 10,000 times, removing defects (fiber blocks, fiber intersections, droplets) from the two-dimensional image, randomly taking out 10 fibers, drawing orthogonal lines in the long side direction of the fibers, and directly reading the minimum fiber diameter.

[0196] In the fiber deposit, i.e., the film, formed by the electrostatic spraying method, component (A) is carried on the constituent fibers. The so-called "carrying component (A) on the fiber" means that a part or all of component (A) is contained or buried in the fiber. Regarding the content of component (A) in the film-forming composition, although it also depends on the affinity between the polymer having fiber-forming ability and component (A), if it is about 0.003% by mass or more and 40% by mass or less, the constituent fibers have high skin adhesion, and a film carrying powder with excellent skin followability can be easily formed. On the other hand, if the content of component (A) in the film-forming composition exceeds 40% by mass, it is not easy to form a film carrying powder on the inner side of the constituent fibers. In this way, if a film carrying powder is formed on the fibers constituting the film, since the powder is covered by the fibers, the film tends to be translucent, close to a natural appearance with a soft focus effect. In addition, since the continuity of adhesion is improved, the makeup setting feeling can be sustained for a long time. Furthermore, the adhesion and the uniformity of the makeup effect by the powder can be further enhanced by applying a liquid agent described later.

[0197] As described above, when a powder composition containing component (A), component (B), component (C) and component (D) is electrostatically sprayed onto an object to be coated (e.g., the surface of a substrate such as a resin), component (C) is volatilized to form a coating composed of a deposit of fibers containing component (A), component (B) and component (D), i.e., a fiber sheet. The obtained fiber sheet can be used as a fiber sheet for skin application.

[0198] Therefore, one embodiment of the present invention is a fiber sheet comprising the following components (A), (B) and (D):

[0199] (A) Powder,

[0200] (B) a polymer having a monomer unit having an SP value of 8.6 or more, and

[0201] (D) a polymer having fiber-forming ability,

[0202] Furthermore, the mass ratio (A) / (B) of the component (A) to the component (B) is 5 or more and 200 or less.

[0203] A preferred embodiment thereof is the fiber sheet described below.

[0204] (1) A fiber sheet comprising the following components (A1), (B1) and (D2):

[0205] (A1) Hydrophobic powder,

[0206] (B1) a copolymer of one or more selected from acrylic copolymers and silicone copolymers, wherein the copolymer comprises at least a monomer unit having an SP value of less than 10.5 and a monomer unit having an SP value of more than 10.5 and less than 14.5, and

[0207] (D2) a polymer constituting the fiber,

[0208] Furthermore, the mass ratio (A1) / (B1) of the component (A1) to the component (B1) is 5 or more and 200 or less.

[0209] (2) A fiber sheet comprising the following components (A2), (B2) and (D2):

[0210] (A2) Hydrophilic powder,

[0211] (B2) a polymer having at least an SP value of 8.6 or more and not containing a monomer unit having a polyglycerol structure, and

[0212] (D2) a polymer constituting the fiber,

[0213] Furthermore, the mass ratio (A2) / (B2) of the component (A2) to the component (B2) is 5 or more and 200 or less.

[0214] The thickness of the fibers constituting the fiber sheet is preferably 10 nm or more and 3000 nm or less in terms of equivalent circle diameter, and the fiber sheet is particularly useful as a fiber sheet for adhesive bonding.

[0215] (D2) The fiber-constituting polymer is the component (D), which is a polymer constituting the fiber skeleton.

[0216] The mass ratio (D2) / (A) of the polymer (D2) constituting the fiber to the component (A) is preferably 1 to 60, more preferably 2 to 40, further preferably 3 to 30, and further more preferably 4 to 20, from the viewpoint of stably forming a fiber-containing deposit formed by electrostatic spraying, and from the viewpoint of improving the color development of the formed coating and inhibiting makeup coming off.

[0217] The above-mentioned fiber forming the film will become an infinitely long continuous fiber from the manufacturing principle, but it is preferred that the length is at least 100 times the thickness of the fiber. In this specification, a fiber having a length of more than 100 times the thickness of the fiber is defined as a "continuous fiber". Therefore, the film manufactured by the electrostatic spray method is preferably a porous discontinuous film composed of an accumulation of continuous fibers. This form of film is not only formed into an aggregate and used as a thin sheet, but also has the characteristics of being very soft, and is not easy to loosen even if shear force is applied to it, and has the advantages of excellent tracking of body movements. In addition, it also has the advantage that the film can be easily and completely removed. In contrast, a continuous film without pores is not easy to peel off, and has low sweat dissipation, so there is a possibility that the skin will become stuffy. In addition, for a porous discontinuous film composed of a particle aggregate, in order to completely remove the film, it is necessary to take actions such as applying friction to the entire film, which is difficult to completely remove without damaging the skin.

[0218] In the electrostatic spraying step using the electrostatic spray device 10, as described above, because the skin is also charged, the fibrous film-forming composition formed by the electrostatic spraying volatilizes component (C) while component (A), component (B) and component (D) directly reach the skin in a charged state. Through the electrostatic spinning (electrospinning) technology, it is spit out as continuous fibers, forming a porous deposit on the skin in a close fit. At this time, the powder is carried in the fiber in a state of maintaining high dispersibility, and the skin is coated and fixed in a manner that the fibers are spread over the skin texture of the skin surface and on the skin texture, so that the powder can be evenly attached and maintained on the skin surface.

[0219] As a result, it was found that the dispersibility of the powder of component (A) was improved by component (B), so the color development of the makeup was greatly improved, and not only the coloring power and hiding power were improved, but also beautiful setting makeup was achieved and the effect of suppressing makeup removal over time was excellent.

[0220] The distance between the nozzle and the skin depends on the voltage applied to the nozzle, but is preferably 50 mm to 150 mm from the viewpoint of being able to form a good coating all the time. The distance between the nozzle and the skin can be measured using a commonly used non-contact sensor or the like.

[0221] Regardless of whether the film formed by the electrostatic spraying method is porous or not, the weight per unit area of ​​the film is preferably 0.1 g / m 2 More preferably 1 g / m 2 In addition, it is preferably 50g / m 2 Below, more preferably 40g / m 2 For example, the weight per unit area of ​​the coating is preferably 0.1 g / m2 Above and 50g / m 2 Less than 1 g / m 2 Above and 40g / m 2 By setting the weight per unit area of ​​the film in this manner, the makeup effect of the powder and the adhesion of the film can be improved.

[0222] The “electrostatic spraying step of electrostatically spraying the composition directly onto the skin to form a film” refers to a step of electrostatically spraying the composition onto the skin to form a film, and is preferably a step of performing electrostatic spinning.

[0223] As another method for forming a film, there can be mentioned a method including the steps of spinning, preferably electrospinning, a composition at a place other than the skin to produce a sheet of adhesive fibers which is composed of a deposit of fibers and is transferred to the skin when used, and then applying or transferring the adhesive fiber sheet to the skin. This method of using an adhesive fiber sheet is a method different from the above-mentioned electrostatic spraying step.

[0224] In the present invention, the following step may also be performed: before or after the electrostatic spraying step of forming the film by the electrostatic spraying, or before or after the electrostatic spraying step, a liquid application step containing one or more liquids selected from water, polyols, and oils that are liquid at 20°C is applied to the skin by means other than electrostatic spraying. By applying the liquid before the electrostatic spraying step, the skin surface can be more easily polarized by electrostatic induction, the sprayed film-forming composition can be more easily strongly attached by electrostatic force, and the transparency of the appearance of the sprayed film-forming composition can be improved. In addition, after the electrostatic spraying step, especially just after the electrostatic spraying step, by performing the liquid application step by means other than electrostatic spraying, the film formed by the electrostatic spraying step can be more easily fused with the skin by the liquid, so that the film is strongly attached to the skin, and the transparency is further improved. It is not easy to have a height difference between the end of the film and the skin, thereby, the adhesion between the film and the skin can also be improved. As a result, even if the film is formed in a part where the skin has a large degree of elasticity or a part with a large curvature, it is still not easy to peel off, break, etc. Preferably, when the film is a porous film composed of fiber deposits, even with a high porosity, the film has high adhesion to the skin and is easy to generate a large capillary force. In addition, when the fibers are fine, a high specific surface area of ​​the porous film can be easily achieved.

[0225] Before and / or after the step of forming a porous coating composed of fiber deposits in the electrostatic spraying step, by performing a liquid application step by means other than electrostatic spraying, a coating carrying a moisturizing liquid and a powder can be formed, wherein the moisturizing liquid and the powder are present between the fibers forming the porous coating and / or on the fiber surface. Thus, the adhesion of the coating is improved. In particular, when the fiber polymer constituting the coating is colorless, transparent, or translucent, it is more difficult to identify the coating. Therefore, when the powder is a colored powder or a white powder, since only the color of the powder can be identified, for example, foundation or local makeup products can make the color of the cheeks, etc. present a natural makeup feeling on the skin. In addition, when the coating is colored and opaque, since the coating has a sense of transparency, it can be presented as a part of the skin. In addition, the above-mentioned "colored" also includes white.

[0226] When the liquid used in the liquid application step contains water, examples of the liquid include water, aqueous solutions, aqueous dispersions, and other aqueous liquids. In addition, examples include lotions, emulsions or cosmetic creams composed of emulsions such as O / W emulsions and W / O emulsions, and aqueous liquids thickened with a thickener.

[0227] When a liquid containing water or liquid oil is applied to the skin by means other than electrostatic spraying, various methods can be used. For example, a method in which the liquid can be applied to the skin, such as dripping or spraying, is used. After the liquid is applied to the skin, it is fused to the skin or the coating as required by including a step of applying the liquid, so that a thin layer of the liquid can be formed. Regarding the step of applying the liquid, a method such as wiping by the user's own fingers or using tools such as applicators can be adopted. The liquid can be simply dripped or sprayed, but by having a smearing step, it can be fused with the skin or the coating, and the coating adhesion can be fully improved. As another method, the liquid can also be sprayed toward the skin using a sprayer to form a thin layer of the liquid. In this case, although it is not necessary to apply it in particular, it is also okay to apply it after spraying. In addition, when the liquid is applied only after the coating is formed, sufficient liquid is applied to the skin, and for the excess liquid, the excess liquid can be removed by contacting the sheet material with the step of applying the liquid.

[0228] Regarding the use of the present invention, it can be used as makeup cosmetics such as base before makeup, foundation, concealer, blush, eye shadow, mascara, eyeliner, eyebrow color, protectant, lipstick, etc.; sunscreen cosmetics such as anti-ultraviolet cosmetics, moisturizing cosmetics, wrinkle improvement cosmetics, whitening cosmetics, sebum secretion regulating cosmetics, acne care cosmetics, anti-aging care cosmetics, etc. Skin care cosmetics, etc. Among them, base before makeup, foundation, concealer, protectant, sunscreen cosmetics are more preferred.

[0229] The present invention has been described above based on its preferred embodiment, however, the present invention is not limited to the above embodiment. For example, in the above embodiment, the person who wants to form a film on his / her skin holds the electrostatic spray device 10 so that an electric field is generated between the nozzle of the device 10 and the skin of the user, however, the person who wants to form a film on his / her skin does not need to hold the electrostatic spray device 10 if an electric field can be generated between the two.

[0230] Regarding the above-mentioned embodiment, the present invention further discloses the following method for producing a coating film and the like.

[0231] <1> A powder dispersion comprising the following components (A), (B) and (C):

[0232] (A) Powder,

[0233] (B) a polymer having a monomer unit having an SP value of 8.6 or more, and

[0234] (C) one or more volatile substances selected from alcohols and ketones,

[0235] Furthermore, the mass ratio (A) / (B) of the component (A) to the component (B) is 5 or more and 200 or less.

[0236] <2> A powder dispersion comprising the following components (A1), (B1) and (C):

[0237] (A1) Hydrophobic powder,

[0238] (B1) a copolymer of one or more selected from acrylic copolymers and silicone copolymers, wherein the copolymer has at least a monomer unit having an SP value of less than 10.5 and a monomer unit having an SP value of more than 10.5 and less than 14.5, and

[0239] (C) one or more volatile substances selected from alcohols and ketones,

[0240] Furthermore, the mass ratio (A1) / (B1) of the component (A1) to the component (B1) is 5 or more and 200 or less.

[0241] <3> The powder dispersion according to <2>, wherein the component (B1) is a copolymer of one or more selected from acrylic copolymers and silicone copolymers, and the copolymer has an acrylamide, methacrylamide, or N-acylalkyleneimide structure.

[0242] <4> A powder dispersion comprising the following components (A2), (B2) and (C):

[0243] (A2) Hydrophilic powder,

[0244] (B2) a polymer having at least a monomer unit having an SP value of 8.6 or more and not containing a polyglycerol structure, and

[0245] (C) one or more volatile substances selected from alcohols and ketones,

[0246] Furthermore, the mass ratio (A2) / (B2) of the component (A2) to the component (B2) is 5 or more and 200 or less.

[0247] <5> A powder dispersion as described in <4>, wherein component (B2) is a copolymer of one or more selected from acrylic copolymers, methacrylic copolymers, silicone copolymers and vinyl copolymers, and the copolymer has at least a monomer unit having an SP value of 8.6 or more, but the copolymer does not include a copolymer having a polyglycerol structure.

[0248] <6> A powder dispersion as described in <4>, wherein component (B2) is a copolymer of one or more selected from acrylic copolymers, methacrylic copolymers, silicone copolymers and vinyl copolymers, and the copolymer has a monomer unit containing a structure selected from acrylamide, methacrylamide, N-acylalkyleneimine structure, betaine structure, polyethylene structure and polypropylene structure.

[0249] <7> The powder dispersion according to any one of <1> to <6>, wherein the content of component (A) is 1 mass % to 60 mass %, preferably 3 mass % to 55 mass %, more preferably 5 mass % to 50 mass %.

[0250] <8> The powder dispersion according to any one of <1> to <7>, wherein the content of component (B) is 0.1% by mass to 10% by mass, preferably 0.2% by mass to 8% by mass, and more preferably 0.5% by mass to 5% by mass.

[0251] <9> The powder dispersion according to any one of <1> to <8>, wherein the content of component (C) is 35% by mass to 95% by mass, preferably 40% by mass to 93% by mass, and more preferably 45% by mass to 92% by mass.

[0252] <10> The powder dispersion according to any one of <1> to <9>, further comprising a component (D) a polymer having fiber-forming ability.

[0253] <11> A powder dispersion as described in <10>, wherein the content of component (D) is from 1 mass % to 45 mass %, preferably from 4 mass % to 35 mass %, more preferably from 5 mass % to 30 mass %, further preferably from 6 mass % to 20 mass %.

[0254] <12> A powder dispersion as described in <10> or <11>, wherein component (D) is at least one selected from partially saponified polyvinyl alcohol, low-saponified polyvinyl alcohol, completely saponified polyvinyl alcohol, polyvinyl butyral resin, polyurethane resin, polyacrylic acid resin other than component (B), polymethacrylic acid resin other than component (B), polyvinyl acetal diethylamino acetate, and polylactic acid.

[0255] <13> The powder dispersion according to any one of <1> to <12>, which is a powder dispersion for skin use.

[0256] <14> A film-forming composition for forming a film composed of fiber-containing deposits on the skin by electrostatically spraying a powder dispersion, the powder dispersion containing the following components (A), (B), (C) and (D):

[0257] (A) Powder,

[0258] (B) a polymer having a monomer unit having an SP value of 8.6 or more,

[0259] (C) one or more volatile substances selected from alcohols and ketones, and

[0260] (D) a polymer having fiber-forming ability,

[0261] Furthermore, the mass ratio (A) / (B) of the component (A) to the component (B) is 5 or more and 200 or less.

[0262] <15> A film-forming composition for forming a film composed of fiber-containing deposits on the skin by electrostatically spraying a powder dispersion, the powder dispersion containing the following components (A1), (B1), (C) and (D):

[0263] (A1) Hydrophobic powder,

[0264] (B1) a copolymer of one or more selected from acrylic copolymers and silicone copolymers, wherein the copolymer comprises at least a monomer unit having an SP value of less than 10.5 and a monomer unit having an SP value of more than 10.5 and less than 14.5,

[0265] (C) one or more volatile substances selected from alcohols and ketones, and

[0266] (D) a polymer having fiber-forming ability,

[0267] Furthermore, the mass ratio (A1) / (B1) of the component (A1) to the component (B1) is 5 or more and 200 or less.

[0268] <16> A film-forming composition for forming a film composed of fiber-containing deposits on the skin by electrostatically spraying a powder dispersion, the powder dispersion comprising the following components (A2), (B2), (C) and (D):

[0269] (A2) Hydrophilic powder,

[0270] (B2) a polymer having at least a monomer unit having an SP value of 8.6 or more and not containing a polyglycerol structure,

[0271] (C) one or more volatile substances selected from alcohols and ketones, and

[0272] (D) a polymer having fiber-forming ability,

[0273] Furthermore, the mass ratio (A2) / (B2) of the component (A2) to the component (B2) is 5 or more and 200 or less.

[0274] <17> The film-forming composition according to any one of <14> to <16>, wherein the content of component (A) is 0.01% by mass to 20% by mass, preferably 0.1% by mass to 10% by mass, and more preferably 0.5% by mass to 5% by mass.

[0275] <18> The film-forming composition according to any one of <14> to <17>, wherein the content of component (B) is 0.01% by mass to 3% by mass, preferably 0.02% by mass to 2% by mass, and more preferably 0.04% by mass to 0.5% by mass.

[0276] <19> The film-forming composition as described in any one of <14> to <18>, wherein the content of component (C) is 45 mass % to 95 mass %, preferably 50 mass % to 92 mass %, and more preferably 55 mass % to 90 mass %.

[0277] <20> A film-forming composition as described in any one of <14> to <19>, wherein the content of component (D) is from 1 mass % to 45 mass %, preferably from 4 mass % to 35 mass %, more preferably from 5 mass % to 30 mass %, further preferably from 6 mass % to 20 mass %.

[0278] <21> A film-forming composition as described in any one of <14> to <20>, wherein the content ratio of component (C) to component (D) ((D) / (C)) is preferably from 0.04 to 0.6, more preferably from 0.05 to 0.5, further preferably from 0.06 to 0.4, and further more preferably from 0.08 to 0.3.

[0279] <22> A film-forming composition as described in any one of <14> to <21>, wherein the mass ratio of component (D) to component (B) ((D) / (B)) is preferably 20 to 500, more preferably 30 to 250, and even more preferably 40 to 200.

[0280] <23> A method for producing a coating, comprising forming a coating composed of a deposit containing fibers on a surface of an object to be coated using a powder dispersion, the powder dispersion containing the following components (A), (B), (C) and (D):

[0281] (A) Powder,

[0282] (B) a polymer having a monomer unit having an SP value of 8.6 or more,

[0283] (C) one or more volatile substances selected from alcohols and ketones, and

[0284] (D) a polymer having fiber-forming ability,

[0285] Furthermore, the mass ratio (A) / (B) of the component (A) to the component (B) is 5 or more and 200 or less.

[0286] <24> A method for producing a coating, comprising forming a coating composed of a deposit containing fibers on a surface of an object to be coated using a powder dispersion, the powder dispersion containing the following components (A1), (B1), (C) and (D):

[0287] (A1) Hydrophobic powder,

[0288] (B1) a copolymer of one or more selected from acrylic copolymers and silicone copolymers, wherein the copolymer comprises at least a monomer unit having an SP value of less than 10.5 and a monomer unit having an SP value of more than 10.5 and less than 14.5,

[0289] (C) one or more volatile substances selected from alcohols and ketones, and

[0290] (D) a polymer having fiber-forming ability,

[0291] Furthermore, the mass ratio (A1) / (B1) of the component (A1) to the component (B1) is 5 or more and 200 or less.

[0292] <25> A method for producing a coating, comprising forming a coating composed of a deposit containing fibers on a surface of an object to be coated using a powder dispersion, the powder dispersion containing the following components (A2), (B2), (C) and (D):

[0293] (A2) Hydrophilic powder,

[0294] (B2) a polymer having at least a monomer unit having an SP value of 8.6 or more and not containing a polyglycerol structure,

[0295] (C) one or more volatile substances selected from alcohols and ketones, and

[0296] (D) a polymer having fiber-forming ability,

[0297] Furthermore, the mass ratio (A2) / (B2) of the component (A2) to the component (B2) is 5 or more and 200 or less.

[0298] <26> A fiber sheet comprising the following components (A), (B) and (D):

[0299] (A) Powder,

[0300] (B) a polymer having a monomer unit having an SP value of 8.6 or more, and

[0301] (D) a polymer having fiber-forming ability,

[0302] Furthermore, the mass ratio (A) / (B) of the component (A) to the component (B) is 5 or more and 200 or less.

[0303] <27> A fiber sheet comprising the following components (A1), (B1) and (D):

[0304] (A1) Hydrophobic powder,

[0305] (B1) a copolymer of one or more selected from acrylic copolymers and silicone copolymers, wherein the copolymer comprises at least a monomer unit having an SP value of less than 10.5 and a monomer unit having an SP value of more than 10.5 and less than 14.5, and

[0306] (D) a polymer having fiber-forming ability,

[0307] Furthermore, the mass ratio (A1) / (B1) of the component (A1) to the component (B1) is 5 or more and 200 or less.

[0308] <28> A fiber sheet comprising the following components (A2), (B2) and (D):

[0309] (A2) Hydrophilic powder,

[0310] (B2) a polymer having at least a monomer unit having an SP value of 8.6 or more and not containing a polyglycerol structure, and

[0311] (D) a polymer having fiber-forming ability,

[0312] Furthermore, the mass ratio (A2) / (B2) of the component (A2) to the component (B2) is 5 or more and 200 or less.

[0313] <29> The fiber sheet according to any one of <26> to <28>, wherein the thickness of the fibers constituting the fiber sheet is 10 nm or more and 3000 nm or less in terms of an equivalent circle diameter.

[0314] [Example]

[0315] The present invention is further described in detail below with reference to the following examples, but the present invention is not limited to these examples. Unless otherwise stated, "%" means "mass %".

[0316] (Production Example) (Poly (N-propionylethyleneimine) modified silicone

[0317] 7.57 g (0.049 mol) of diethyl sulfate and 263.3 g (2.66 mol) of 2-ethyl-2-oxazoline were dissolved in 550 g of dehydrated ethyl acetate, and heated under reflux for 8 hours under a nitrogen atmosphere to synthesize terminal reactive poly (N-propionylethyleneimine). 250 g (0.065 mol in terms of amino group) of side chain primary aminopropyl modified polydimethylsiloxane (weight average molecular weight 60,000, ammonia equivalent 3,870) in 50% ethyl acetate solution was added at once, and heated under reflux for 12 hours. The number average molecular weight measured by GPC was 5,400.

[0318] The reaction mixture was concentrated under reduced pressure to obtain a pale yellow rubbery solid N-propionylethyleneimine-dimethylsiloxane copolymer (505 g, yield 97%). The mass ratio of the organopolysiloxane segment in the final product was 0.51, and the weight average molecular weight of the final product was 88,400.

[0319] [Test Example 1]

[0320] [Examples 1 to 11 and Comparative Examples 1 to 10]

[0321] The powder dispersions described in Tables 1 to 5 were produced.

[0322] [evaluate]

[0323] (1) Appearance evaluation

[0324] The powder dispersions described in Tables 1 to 5 were evaluated by observation on their appearance from immediately after production to 3 hours later according to the following evaluation criteria.

[0325] A: Still uniformly dispersed after 3 hours.

[0326] B: It is uniformly dispersed after production, but precipitation occurs within 1 to 3 hours.

[0327] C: Precipitation occurs rapidly within 1 hour, and a large amount of pigment adheres to the wall surface.

[0328] D: High viscosity and gelation.

[0329] (2) Particle size measurement

[0330] The particle size of the powder in the powder dispersion was measured by a dynamic light scattering method. Specifically, the powder was diluted with ethanol, which is a dispersion medium, and the particle size (D50) of the powder in the powder dispersion was measured using Zeta sizer Nano ZS (manufactured by Malvern).

[0331] [Test Example 2]

[0332] [Examples 12 to 27 and Comparative Examples 11 to 20]

[0333] The film-forming compositions described in Tables 6 to 11 were produced.

[0334] [evaluate]

[0335] (1) Particle size measurement

[0336] The particle size of the powder in the film-forming composition was measured by a dynamic light scattering method. Specifically, the composition was diluted with ethanol, which is a dispersion medium, and the particle size (D50) of the powder in the film-forming composition was measured using Zeta sizer Nano ZS (manufactured by Malvern).

[0337] (2) Evaluation of whether the overall uniformity of the film-forming composition is maintained

[0338] After the production, the powder was left to stand at 60° C. for 1 week, and the dispersibility of the powder was evaluated by observation according to the following evaluation criteria.

[0339] A: Even after being left at 60°C for one week, the powder dispersion was uniformly maintained.

[0340] B: After standing at 60°C for one week, although there are some spots, it still seems to be roughly uniform.

[0341] C: After standing at 60°C for 1 week, pigment precipitation was observed, and the state was uneven.

[0342] D: After standing at 60°C for one week, most of the pigment precipitated and the state became uneven.

[0343] (3) The film-forming composition was electrostatically sprayed onto the substrate, and the hiding power (color development) of the obtained film was evaluated.

[0344] A: The color of the substrate is covered and the color is fully developed.

[0345] B: The color of the substrate is slightly covered and there is color development.

[0346] C: The color of the substrate is not covered much and the color is not very vivid.

[0347] D: The substrate color is barely covered and there is almost no color development.

[0348] (4) The film-forming composition was electrostatically sprayed onto a substrate, and whether or not the composition did not come off after being left to stand for 5 hours was evaluated.

[0349] A: The makeup will not come off even after 5 hours, and the uniformity of the film is maintained.

[0350] B: After 5 hours, only slight makeup removal occurred, and the uniformity of the film was roughly maintained after it was formed.

[0351] C: Slight makeup fading was observed after 5 hours, and the makeup setting was slightly uneven.

[0352] D: Makeup removal was observed after 5 hours, and the makeup setting was uneven.

[0353] (5) Electrostatic spraying step

[0354] Use with Figure 1 The structure shown and having Figure 2 The electrostatic spraying device 10 having the appearance shown was used to perform electrostatic spraying on the resin substrate for 20 seconds. The conditions of the electrostatic spraying were as follows.

[0355] Applied voltage: 10kV

[0356] Distance between conductive nozzle and substrate: 100mm

[0357] ·Discharge rate of film-forming composition: 5 mL / h

[0358] Environment: 25℃, 30%RH

[0359] The electrostatic spraying formed a porous film composed of fiber deposits on the surface of the resin substrate. The film was a circle with a diameter of about 4 cm and a mass of about 5.5 mg. The thickness of the fiber measured by the above method was 1 μm.

[0360] [Table 1]

[0361]

[0362] [Table 2]

[0363]

[0364] [Table 3]

[0365]

[0366] [Table 4]

[0367]

[0368] [Table 5]

[0369]

[0370] [Table 6]

[0371]

[0372] [Table 7

[0373]

[0374] [Table 8]

[0375]

[0376] [Table 9]

[0377]

[0378] [Table 10]

[0379]

[0380] [Table 11]

[0381]

[0382] [Test Example 3]

[0383] [Examples 28 to 41 and Comparative Examples 21 to 27]

[0384] Powder dispersions described in Tables 12 to 16 were prepared, and evaluated in the same manner as in Test Example 1.

[0385] [Test Example 4]

[0386] [Examples 42 to 60 and Comparative Examples 28 to 34]

[0387] Powder dispersions described in Tables 17 to 22 were prepared and evaluated in the same manner as in Test Example 2.

[0388] [Table 12]

[0389]

[0390] [Table 13]

[0391]

[0392] [Table 14]

[0393]

[0394] [Table 15]

[0395]

[0396] [Table 16]

[0397]

[0398] [Table 17]

[0399]

[0400] [Table 18]

[0401]

[0402] [Table 19]

[0403]

[0404] [Table 20]

[0405]

[0406] [Table 21]

[0407]

[0408] [Table 22]

[0409]

[0410] [Test Example 5]

[0411] The film-forming composition of Formulation Example 1 was electrostatically sprayed onto a substrate to produce a fiber sheet, and the hiding power (color development) was evaluated, which was found to be good.

[0412] [Formulation Example 1]

[0413] Polydimethylsiloxane treated titanium oxide

[0414] (Made by Miyoshi Chemicals, SA treatment, made by Ishihara Sangyo Co., Ltd., CR-50) 1.81%

[0415] Polydimethylsiloxane treated iron oxide yellow 0.24%

[0416] Polydimethylsiloxane treated red iron oxide 0.11%

[0417] Triethoxyoctylsilane-treated titanium dioxide microparticles

[0418]

[0419] [Test Example 6]

[0420] The film-forming composition of Formulation Example 2 was electrostatically sprayed onto a substrate to produce a fiber sheet, and the hiding power (color development) was evaluated, which was found to be good.

[0421] [Formulation Example 2]

[0422] Aluminum hydroxide treated titanium oxide

[0423]

[0424] [Explanation of symbols]

[0425] 10: Electrostatic spray device

[0426] 11: Low voltage power supply

[0427] 12: High voltage power supply

[0428] 13: Auxiliary circuit

[0429] 14: Micro gear pump

[0430] 15: Container

[0431] 16: Nozzle

[0432] 17: Pipeline

[0433] 18: Flexible pipe

[0434] 19: Current limiting resistor

[0435] 20: Frame.

Claims

1. A film-forming composition for forming a film composed of a fiber-containing deposit on the skin by electrostatically spraying a powder dispersion liquid, The powder dispersion contains the following components (A), (B), (C) and (D): (A) Powder, (B) a polymer having a monomer unit having an SP value of 8.6 or more, (C) one or more volatile substances selected from alcohols and ketones, and (D) a polymer having fiber-forming ability, Furthermore, the mass ratio A / B of the component (A) to the component (B) is 5 or more and 200 or less.

2. A film-forming composition for forming a film composed of a fiber-containing deposit on the skin by electrostatically spraying a powder dispersion liquid, The powder dispersion contains the following components (A1), (B1), (C) and (D): (A1) Hydrophobic powder, (B1) a copolymer of one or more selected from acrylic copolymers and silicone copolymers, wherein the copolymer comprises at least a monomer unit having an SP value of less than 10.5 and a monomer unit having an SP value of more than 10.5 and less than 14.5, (C) one or more volatile substances selected from alcohols and ketones, and (D) a polymer having fiber-forming ability, Furthermore, the mass ratio A1 / B1 of the component (A1) to the component (B1) is 5 or more and 200 or less.

3. The film-forming composition according to claim 2, wherein Component (B1) is a copolymer of one or more selected from acrylic copolymers and silicone copolymers, and the copolymer has an acrylamide, methacrylamide or N-acylalkyleneimide structure.

4. A film-forming composition for forming a film composed of a fiber-containing deposit on the skin by electrostatically spraying a powder dispersion liquid, The powder dispersion contains the following components (A2), (B2), (C) and (D): (A2) Hydrophilic powder, (B2) a polymer having at least an SP value of 8.6 or more and containing no monomer unit having a polyglycerol structure, (C) one or more volatile substances selected from alcohols and ketones, and (D) a polymer having fiber-forming ability, Furthermore, the mass ratio A2 / B2 of the component (A2) to the component (B2) is 5 or more and 200 or less.

5. The film-forming composition according to claim 4, wherein Component (B2) is a copolymer of one or more selected from acrylic copolymers, methacrylic copolymers, silicone copolymers and vinyl copolymers, and the copolymer has at least a monomer unit with an SP value of 8.6 or more. However, component (B2) does not include a copolymer having a polyglycerol structure.

6. The film-forming composition according to claim 5, wherein Component (B2) is a copolymer of one or more selected from acrylic copolymers, methacrylic copolymers, silicone copolymers and vinyl copolymers, and the copolymer has a monomer unit containing a structure selected from acrylamide, methacrylamide, N-acylalkyleneimine structure, betaine structure, polyethylene structure and polypropylene structure.

7. A method for manufacturing a coating, wherein: A film composed of a deposit containing fibers is formed on the surface of an object to be coated using a powder dispersion. The powder dispersion contains the following components (A), (B), (C) and (D): (A) Powder, (B) a polymer having a monomer unit having an SP value of 8.6 or more, (C) one or more volatile substances selected from alcohols and ketones, and (D) a polymer having fiber-forming ability, Furthermore, the mass ratio A / B of the component (A) to the component (B) is 5 or more and 200 or less.

8. A method for manufacturing a coating, wherein: A film composed of a deposit containing fibers is formed on the surface of an object to be coated using a powder dispersion. The powder dispersion contains the following components (A1), (B1), (C) and (D): (A1) Hydrophobic powder, (B1) one or more copolymers selected from acrylic copolymers and silicone copolymers, the copolymer comprising at least a monomer unit having an SP value of less than 10.5 and a monomer unit having an SP value of more than 10.5 and less than 14.5, (C) one or more volatile substances selected from alcohols and ketones, and (D) a polymer having fiber-forming ability, Furthermore, the mass ratio A1 / B1 of the component (A1) to the component (B1) is 5 or more and 200 or less.

9. A method for manufacturing a coating, wherein: A film composed of a deposit containing fibers is formed on the surface of an object to be coated using a powder dispersion. The powder dispersion contains the following components (A2), (B2), (C) and (D): (A2) Hydrophilic powder, (B2) a polymer having at least an SP value of 8.6 or more and containing no monomer unit having a polyglycerol structure, (C) one or more volatile substances selected from alcohols and ketones, and (D) a polymer having fiber-forming ability, Furthermore, the mass ratio A2 / B2 of the component (A2) to the component (B2) is 5 or more and 200 or less.

10. A fiber sheet, wherein: Contains the following ingredients (A), (B) and (D): (A) Powder, (B) a polymer having a monomer unit having an SP value of 8.6 or more, and (D) a polymer having fiber-forming ability, Furthermore, the mass ratio A / B of the component (A) to the component (B) is 5 or more and 200 or less.

11. A fiber sheet, wherein: Contains the following ingredients (A1), (B1) and (D): (A1) Hydrophobic powder, (B1) a copolymer of one or more selected from acrylic copolymers and silicone copolymers, the copolymer having at least a monomer unit having an SP value of less than 10.5 and a monomer unit having an SP value of more than 10.5 and less than 14.5, and (D) a polymer having fiber-forming ability, Furthermore, the mass ratio A1 / B1 of the component (A1) to the component (B1) is 5 or more and 200 or less.

12. A fiber sheet, wherein: Contains the following ingredients (A2), (B2) and (D): (A2) Hydrophilic powder, (B2) a polymer having at least a monomer unit having an SP value of 8.6 or more and not containing a polyglycerol structure, and (D) a polymer having fiber-forming ability, Furthermore, the mass ratio A2 / B2 of the component (A2) to the component (B2) is 5 or more and 200 or less.

13. The fiber sheet according to any one of claims 10 to 12, wherein The thickness of the fibers constituting the fiber sheet is 10 nm or more and 3000 nm or less in terms of an equivalent circle diameter.

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