Film-forming composition

Abstract

To provide a film-forming composition that has improved color development as makeup and provides a film without color change after repeated use, when sprayed with electrostatic spray to form a film.SOLUTION: Provided is a film-forming composition for forming on the skin a film consisting of deposits containing fibers by electrostatic spraying of a powder dispersion containing the following ingredients (A), (B), (C) and (E): (A) a powder; (B) one or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups; (C) one or more volatile substances selected from alcohols and ketones; and (E) a polymer with fiber-forming ability.SELECTED DRAWING: None

Description

[Technical Field]

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

[0002] Powder dispersions, in which powder is dispersed in a liquid, are widely used in fields such as cosmetics, paints, and printing inks. Among these, powder dispersions in which alcohol or ketone is used as the dispersion medium have been reported to contain (a) one or more volatile substances selected from water, alcohol, and ketone, (b) a polymer having film-forming ability, and (c) powder (a powder dispersion (a spray composition) (Patent Document 1). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2018-177794 [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] However, the powder dispersion (spray composition) described in Patent Document 1 is prone to high viscosity and sedimentation of the powder layer in the volatile substance, resulting in problems with redispersibility and stability during storage. For example, when a coating is formed using the powder dispersion (spray composition), it has been found that there may be a decrease in color development as a makeup, and the applied color may vary each time it is used after being stored at rest. Therefore, the present invention provides a film-forming composition that, when sprayed by electrostatic spraying to form a film, has improved color development as a makeup product, and the applied color does not change even after being stored and then used. [Means for solving the problem]

[0005] Therefore, the inventors investigated the redispersibility and usability of a powder dispersion when adding various components to a volatile substance. They found that by incorporating carboxylic acids having a specific structure, loosely bound powder aggregates (soft particle aggregates) are formed. These aggregates form sediment, but they can be broken down by stirring, etc., and easily redispersed, resulting in a powder dispersion with excellent usability. Furthermore, these powder aggregates return to their original state when left standing, but can be broken down and redispersed by stirring, etc. Moreover, they found that by electrostatically spraying a film-forming composition obtained by incorporating a polymer with fiber-forming ability into this powder dispersion, the color development as makeup is improved, and a film is obtained in which the applied color does not change even with repeated use, thus completing the present invention.

[0006] In other words, the present invention provides the following inventions [1] to [4]. [1] The following components (A), (B), (C), and (E): (A) Powder, (B) One or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups, (C) One or more volatile substances selected from alcohols and ketones, and (E) Polymers having fiber-forming ability A coating-forming composition for forming a film on the skin by electrostatic spraying a powder dispersion containing [a certain substance], which consists of a deposit containing fibers. [2] The following components (A), (B), (C), and (E): (A) Powder, (B) One or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups, (C) One or more volatile substances selected from alcohols and ketones, and (E) Polymers having fiber-forming ability A method for producing a coating, comprising using a powder dispersion containing a certain substance to form a coating on the surface of an object to be coated, comprising deposits containing fibers. [3] A fiber sheet containing the following components (A), (B), and (E2). (A) Powder (B) One or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups (E2) Polymer constituting the fiber [4] A powder dispersion containing the following components (A), (B) and (C). (A) Powder<00​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​(C) One or more volatile substances selected from alcohol and ketone

[0010] As the powder of the present invention, as long as it is a powder commonly used in cosmetics, it is not particularly limited by the shape such as spherical, plate-like, needle-like, etc., the particle diameter such as smoky, fine particles, pigment grade, etc., the particle structure such as porous or non-porous, and can be used. Further, either organic powder or inorganic powder can be used, either hydrophilic powder or hydrophobic powder can be used, and hydrophilized powder or hydrophobized powder can also be used. The hydrophilic powder mentioned here is generally said to have the property of mixing when water and the powder are mixed and the powder settling or dispersing in water. Further, the hydrophobic powder is generally said to have the property of not mixing quickly when water and the powder are mixed and the powder floating on the water surface.

[0011] Inorganic powders include, specifically, colored pigments such as red iron oxide, iron hydroxide, iron titanate, yellow iron oxide, black iron oxide, carbon black, Prussian blue, ultramarine blue, manganese violet, cobalt violet, chromium oxide, chromium hydroxide, cobalt oxide, and cobalt titanate; titanium dioxide, 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, aluminum magnesium silicate, calcium silicate, barium silicate, strontium silicate, tungstate metal salts, hydroxyapatite, vermiculite, bentonite, montmorillonite, hectorite, and smectite. Examples include white or extender pigments such as zeolite, ceramic powder, dicalcium phosphate, alumina, silica, aluminum hydroxide, boron nitride, and synthetic sericite; and pearl pigments (lustrous powders) such as fish scale foil, titanium dioxide-coated mica (titanium mica), bismuth oxychloride, titanium dioxide-coated bismuth oxychloride, titanium dioxide-coated talc, titanium dioxide-coated colored mica, titanium dioxide-coated iron oxide-coated mica, fine particle titanium dioxide-coated titanium mica, fine particle zinc oxide-coated titanium mica, organic pigment-treated titanium mica, lower-grade titanium dioxide-coated mica, mica, titanium dioxide-coated synthetic mica, titanium dioxide-coated plate-shaped silica, hollow plate-shaped titanium dioxide, iron oxide-coated mica, plate-shaped iron oxide (MIO), aluminum flakes, stainless steel flakes, titanium dioxide-coated plate-shaped alumina, pearl shells, gold leaf, gold vapor-deposited resin film, and metal vapor-deposited resin film. Examples of organic powders include silicone resins, polymethylsilsesquioxane, nylon powder, silk powder, urethane powder, cellulose powder, and other organic powders; organic tar-based pigments such as Red No. 104, Red No. 102, Red No. 226, Red No. 201, Red No. 202, Yellow No. 4, and Black No. 401; organic dyes and their lake derivatives can be used individually or in combination of two or more.

[0012] The powders used in this invention can all be used as is, or one or more of them may be used after being hydrophobized. The hydrophobic treatment is not limited to any treatment that is normally applied to cosmetic powders, and surface treatment agents such as fluorine compounds, silicone compounds, metal soaps, amino acid compounds, lecithin, alkylsilanes, oils, and organic titanates may be used, and dry treatment, wet treatment, etc., may be performed. Specific examples of surface treatment agents include fluorine-based compounds such as perfluoropolyethers, perfluoroalkyl phosphates, perfluoroalkylalkoxysilanes, and fluorine-modified silicones; silicone-based compounds such as dimethylpolysiloxane, methylhydrogenpolysiloxane, cyclic silicones, organopolysiloxanes with one or both trialkoxy groups, cross-linked silicones, silicone resins, fluorine-modified silicone resins, and acrylic-modified silicones; metal soaps such as aluminum stearate, aluminum myristate, zinc stearate, and magnesium stearate; amino acid-based compounds such as proline, hydroxyproline, alanine, glycine, sarcosine, glutamic acid, aspartic acid, lysine, and their derivatives; lecithin, hydrogenated lecithin; methyltrimethoxysilane, ethyltrimethyl Examples include alkylsilanes such as toxysilane, hexyltrimethoxysilane, octyltrimethoxysilane, and octyltriethoxysilane; oils such as polyisobutylene, waxes, and fats; and organic titanates such as isopropyl titanium triisostearate.

[0013] The powders used in this invention may also be those in which one or more of these have been hydrophilized. The hydrophilization treatment is not limited to any treatment that is normally applied to cosmetic powders. For example, plant-derived polymers such as gum arabic, tragacanth, arabinogalactan, locust bean gum (carob gum), guar gum, karaya gum, carrageenan, pectin, agar, quince seed (quince), starch (rice, corn, potato, wheat), algae colloid, trant gum, locust bean gum; microbial polymers such as xanthan gum, dextran, succinoglucan, pullulan; animal-derived polymers such as collagen, casein, albumin, deoxyribonucleic acid (DNA) and its salts; starch-derived polymers such as carboxymethyl starch and methylhydroxypropyl starch; methylcellulose, ethylcellulose Examples include cellulose-based polymers such as methylhydroxypropylcellulose, carboxymethylcellulose, hydroxymethylcellulose, hydroxypropylcellulose, nitrocellulose, sodium cellulose sulfate, sodium carboxymethylcellulose, crystalline cellulose, and cellulose powder; alginate-based polymers such as sodium alginate and propylene glycol alginate; vinyl-based polymers such as polyvinyl methyl ether, polyvinylpyrrolidone, and carboxyvinyl polymer; polyoxyethylene-based polymers such as polyethylene glycol and polyethylene glycol silane; and inorganic silicate compounds such as silica.

[0014] The average particle size of the powder of component (A) is not particularly limited, but when the powder dispersion of the present invention is used as a skin cosmetic, an average particle size of 0.001 μm to 200 μm is preferred, more preferably 0.01 μm to 50 μm, even more preferably 0.02 μm to 20 μm, and still more preferably 0.05 μm to 15 μm, in order to adhere uniformly to the skin's ridges, grooves, and pores and give a natural cosmetic feel. In this invention, the average particle size of the powder is measured by electron microscopy observation or by a particle size distribution analyzer using the laser diffraction / scattering method. Specifically, in the case of the laser diffraction / scattering method, ethanol is used as the dispersion medium and the measurement is performed using a laser diffraction / scattering particle size distribution analyzer (for example, LMS-350 manufactured by Seishin Corporation). When the powder is hydrophobized, the average particle size and content of component (A) refer to the average particle size and mass including the hydrophobized agent.

[0015] The content of component (A) in the powder dispersion of the present invention may be any amount that allows component (A) to perform its function, but from the viewpoint of maintaining good redispersibility and usability, it is preferably 1% by mass or more, more preferably 3% by mass or more, and even more preferably 5% by mass or more. Furthermore, from the viewpoint of maintaining good redispersibility and usability, it is preferably 60% by mass or less, more preferably 55% by mass or less, and even more 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 even more preferably 5% by mass or more and 50% by mass or less.

[0016] Component (B) used in the present invention is one or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups. These specific carboxylic acids are thought to cause the powder dispersed in component (C) to form a bulky powder layer (flocculation), making it easily dispersible. Therefore, the powder dispersion of the present invention can be easily redispersed even after storage and can be used in the same way as a stable dispersion. Component (B) is preferably one or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups and a molecular weight of 500 or less. Specifically, examples include malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, fumaric acid, oxalic acid, trimesic acid, etc. Hydroxycarboxylic acids having 4 to 12 carbon atoms and 2 to 4 carboxyl groups are more preferred, as are aromatic carboxylic acids having 8 to 14 carbon atoms and 2 to 4 carboxyl groups, with malic acid, citric acid, and trimesic acid being even more preferred.

[0017] The content of component (B) in the powder dispersion of the present invention is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and even more preferably 0.1% by mass or more, from the viewpoint of maintaining good redispersibility and usability of component (A) in the powder dispersion. Furthermore, from the viewpoint of maintaining good redispersibility and usability, it is preferably 10% by mass or less, more preferably 7% by mass or less, and even more preferably 3% by mass or less. Specifically, it is preferably 0.01% by mass or more and 10% by mass or less, more preferably 0.05% by mass or more and 7% by mass or less, and even more preferably 0.1% by mass or more and 3% by mass or less.

[0018] In the powder dispersion of the present invention, the mass ratio of component (A) to component (B) ((A) / (B)) is preferably 5 or more, more preferably 10 or more, even more preferably 15 or more, and also preferably 300 or less, more preferably 250 or less, and even more preferably 200 or less, from the viewpoint of maintaining good redispersibility and usability of component (A) in the powder dispersion. Specifically, it is preferably 5 to 300, more preferably 10 to 250, and even more preferably 15 to 200.

[0019] Component (C) used in the powder dispersion of the present invention is one or more volatile substances selected from alcohols and ketones. Here, a volatile substance is a substance that readily volatilizes into the atmosphere at room temperature and pressure. Among these, monohydric chain aliphatic alcohols, monohydric cyclic aliphatic alcohols, and monohydric aromatic alcohols are preferably used as alcohols. Examples of monohydric chain aliphatic alcohols include C1-C6 alcohols, examples of monohydric cyclic alcohols include C4-C6 cyclic alcohols, and examples of monohydric aromatic alcohols include benzyl alcohol and phenylethyl alcohol. Specific examples of these include ethanol, isopropyl alcohol, butyl alcohol, phenylethyl alcohol, n-propanol, and n-pentanol. One or more of these alcohols can be used. Among the volatile substances of component (C), polyols, which are polyhydric alcohols, are not included.

[0020] Among the volatile substances of component (C), examples of ketones include diC1-C4 alkyl ketones, such as acetone, methyl ethyl ketone, and methyl isobutyl ketone. These ketones can be used individually or in combination of two or more.

[0021] The volatile substance of component (C) is more preferably one or more selected from ethanol, isopropyl alcohol, and butyl alcohol, even more preferably one or more selected from ethanol and butyl alcohol, and even more preferably contains at least ethanol.

[0022] 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 even more preferably 45% by mass or more, from the viewpoint of maintaining good redispersibility and usability of component (A) in the powder dispersion. Furthermore, it is preferably 95% by mass or less, more preferably 93% by mass or less, even more preferably 92% by mass or less, and even 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 even more preferably 45% by mass or more and 92% by mass or less. The content of component (C) in the powder dispersion is preferably 85% by mass or less if it contains component (E), which will be described later. Furthermore, the volatile substance of component (C) preferably contains ethanol, in which case the amount of ethanol is preferably 50% by mass or more, more preferably 65% ​​by mass or more, even more preferably 80% by mass or more, and preferably 100% by mass or less, based on the total amount of the volatile substance of component (C). The amount 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 even more preferably 80% by mass or more and 100% by mass or less, based on the total amount of the volatile substance of component (C).

[0023] In order to further stabilize the dispersibility of component (A), it is more preferable to incorporate a polymer having monomer units with an SP value of at least 8.6 or higher and that do not contain a polyglyceryl structure into the powder dispersion of the present invention. In other words, one aspect of the present invention is a powder dispersion containing the following components (A), (B), (C), and (D). (A) Powder, (B) From hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups One or more types will be selected. (C) One or more volatile substances selected from alcohols and ketones, (D) Polymers having monomer units with an SP value of at least 8.6 or higher and which do not contain a polyglyceryl structure.

[0024] The SP value is the Solubility Parameter. The polymer of component (D) has monomer units with an SP value of 8.6 or higher (however, it does not have monomer units with a polyglyceryl structure), which is thought to suppress the aggregation and precipitation of the hydrophilic powder of component (A) in component (C) (volatile substance). Furthermore, the polymer of component (D) interacts with the powder of component (A) in the powder dispersion to prevent aggregation and precipitation of the powder, and is not a polymer that has fiber-forming ability when the powder dispersion is electrostatically sprayed, as described later as (E) a polymer with fiber-forming ability. Furthermore, the polymer of component (D) is preferably soluble in or dispersible in ethanol.

[0025] The polymer of component (D) may be a homopolymer or a copolymer, but it is preferable that it be a copolymer having monomer units with an SP value of 8.6 or higher. Furthermore, the copolymer of component (D) is preferably one or more copolymers selected from acrylic copolymers, methacrylic copolymers, silicone copolymers, and vinyl copolymers having monomer units with an SP value of at least 8.6 (however, copolymers having a polyglyceryl structure are excluded).

[0026] As monomer units with an SP value of 8.6 or higher, monomer units having a structure selected from acrylamide, methacrylamide, N-acylalkyleneimine structure, betaine structure, polyethylene structure, and polypropylene structure are more preferred. Therefore, component (D) is more preferably one or more copolymers selected from acrylic copolymers, methacrylic copolymers, silicone copolymers, and vinyl copolymers, having monomer units having structures selected from acrylamide, methacrylamide, N-acylalkyleneimine structure, betaine structure, polyethylene structure, and polypropylene structure. Specifically, examples include (octylacrylamide / hydroxypropyl acrylate / butylaminoethyl methacrylate) copolymer, (alkyl acrylate / octylacrylamide) copolymer, (acrylates / t-butylacrylamide) copolymer, PEG / PPG-20 / 22 butyl ether dimethicone, (VA / crotonic acid / vinyl neodecanoate) copolymer, (ethyl betaine methacrylate / acrylates) copolymer, poly(N-formylethyleneimine) organosiloxane, poly(N-acetylethyleneimine) organosiloxane, and poly(N-propionylethyleneimine) organosiloxane, with (octylacrylamide / hydroxypropyl acrylate / butylaminoethyl methacrylate) copolymer, (alkyl acrylate / octylacrylamide) copolymer, and poly(N-propionylethyleneimine) organosiloxane being preferred.

[0027] From the viewpoint of maintaining good dispersibility and dispersion stability of component (A) in the powder dispersion of the present invention, the content of component (D) is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, and even more preferably 0.5% by mass or more. Furthermore, 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 even more 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 even more preferably 0.5% by mass or more and 10% by mass or less.

[0028] In the powder dispersion of the present invention, the mass ratio (A / D) of component (A) to component (D) is preferably 5 to 200, from the viewpoint of maintaining good dispersibility and dispersion stability of component (A) in the powder dispersion. From the viewpoint of maintaining good dispersibility and dispersion stability, the mass ratio (A / D) is more preferably 6 or more, even more preferably 7 or more, even more preferably 8 or more, even more preferably 100 or less, even more preferably 50 or less, and even more preferably 40 or less. Specifically, it is more preferably 6 to 100, even more preferably 7 to 50, and even more preferably 8 to 40.

[0029] One embodiment of the powder dispersion of the present invention includes adding the above components (A), (B), and (C) Furthermore, a powder dispersion containing component (E) a polymer having fiber-forming ability is mentioned. That is, one embodiment thereof is a powder dispersion containing the following components (A), (B), (C) and (E). (A) Powder, (B) One or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups, (C) One or more volatile substances selected from alcohols and ketones, (E) Polymers having fiber-forming ability This powder dispersion is useful as a skin powder dispersion, i.e., a skin cosmetic, and is particularly useful as a film-forming composition for forming a film on the skin consisting of a deposit of fibers mainly composed of component (E) by electrostatic spraying. Electrospinning is preferred as the electrostatic spraying method. The composition used in electrostatic spraying is also called a "spraying composition" or "spinning composition." "Spraying" includes not only discharging in a mist, but also discharging a liquid that is extended and discharged in a fibrous form.

[0030] The component (E), a polymer having fiber-forming ability, used here is a substance that can dissolve in the volatile substance of component (C) and is a polymer that has the ability to form fibers when electrostatically sprayed. In other words, it is a component that forms the constituent of continuous fibers and is the main component polymer of the fibers. Here, dissolution means that it is in a dispersed state at 20°C, and that the dispersion state is uniform to the naked eye, preferably transparent or translucent to the naked eye. Component (E) is a polymer other than component (D) and constitutes the main component of continuous fibers.

[0031] As polymers having fiber-forming ability, appropriate polymers are used depending on the properties of the volatile substance of component (C). Specifically, polymers having fiber-forming ability are broadly classified into water-soluble polymers and water-insoluble polymers. In this specification, "water-soluble polymer" refers to a polymer that, when weighed at 1 atmosphere and 23°C, is immersed in 10 g of deionized water, and after 24 hours, at least 0.5 g of the immersed polymer dissolves in water. On the other hand, in this specification, "water-insoluble polymer" refers to a polymer that, when weighed at 1 atmosphere and 23°C, is immersed in 10 g of deionized water, and after 24 hours, at least 0.5 g of the immersed polymer does not dissolve.

[0032] Examples of water-soluble polymers with fiber-forming properties include mucopolysaccharides such as pullulan, hyaluronic acid, chondroitin sulfate, poly-γ-glutamic acid, modified corn starch, β-glucan, gluco-oligosaccharides, heparin, and keratosulfate; natural polymers such as cellulose, pectin, xylan, lignin, glucomannan, galacturonic acid, psyllium seed gum, tamarind seed gum, gum arabic, tragacanth gum, soybean water-soluble polysaccharides, alginic acid, carrageenan, laminaran, agar (agarose), fucoidan, methylcellulose, hydroxypropylcellulose, and hydroxypropylmethylcellulose; and synthetic polymers such as partially saponified polyvinyl alcohol (when not used in combination with a crosslinking agent), polyvinylpyrrolidone (PVP), polyethylene oxide, and sodium polyacrylate. These water-soluble polymers can be used individually or in combination of two or more. Of these water-soluble polymers, pullulan, as well as synthetic polymers such as partially saponified polyvinyl alcohol, polyvinylpyrrolidone, and polyethylene oxide, are preferred from the viewpoint of facilitating the production of a coating consisting of a deposit of powder-containing fibers by electrostatic spraying. 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.

[0033] On the other hand, examples of water-insoluble polymers with fiber-forming ability include fully saponified polyvinyl alcohol that can be insolubilized after forming a film consisting of fiber deposits, partially saponified polyvinyl alcohol that can be crosslinked after film formation when used in combination with a crosslinking agent, polyvinyl acetal diethylaminoacetate, polyester such as zein (a major component of corn protein) and polylactic acid (PLA), polyacrylic resins other than component (D) such as polyacrylonitrile resin and polymethacrylic acid resin, polystyrene resin, polyvinyl butyral resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polyurethane resin, polyamide resin, polyimide resin, and polyamide-imide resin. These water-insoluble polymers can be used alone or in combination of two or more. Of these water-insoluble polymers, one or more selected from partially saponified polyvinyl alcohol, fully saponified polyvinyl alcohol, polyvinyl butyral resin, polyurethane resin, polyacrylic resin other than component (D), polymethacrylic resin other than component (D), polyvinyl acetal diethylaminoacetate, and polylactic acid are preferred, one or more selected from polyvinyl butyral resin, polymethacrylic resin other than component (D), and polyurethane resin are more preferred, the inclusion of polyvinyl butyral resin is even more preferred, and polyvinyl butyral resin is particularly preferred as the main component.

[0034] The content of component (E) in the powder dispersion of the present invention is preferably 1% by mass or more, more preferably 4% by mass or more, even more preferably 5% by mass or more, and even more preferably 6% by mass or more, from the viewpoint of improving redispersibility and usability, from the viewpoint of forming a film consisting of deposits of powder-containing fibers when electrostatically sprayed, and from the viewpoint of improving the color development of the formed film. Furthermore, it is preferably 45% by mass or less, more preferably 35% by mass or less, even more preferably 30% by mass or less, and even more preferably 20% by mass or less. Specifically, the content of component (E) 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, even more preferably 5% by mass or more and 30% by mass or less, and even more preferably 6% by mass or more and 20% by mass or less.

[0035] The ratio of the mass ratio of component (E) to component (B) and the content of component (E) ((E) / (B)) in the powder dispersion of the present invention is preferably 1 to 150, more preferably 2 to 100, even more preferably 3 to 80, and still more preferably 4 to 60, from the viewpoint of redispersibility and usability, and from the viewpoint of forming a uniformly supported powder film.

[0036] Furthermore, in order to further stabilize the dispersibility of component (A), it is more preferable to incorporate a polymer having monomer units with an SP value of at least 8.6 or higher and that do not contain a polyglyceryl structure into this powder dispersion.

[0037] This powder dispersion is useful as a skin powder dispersion, i.e., a skin cosmetic. It is also particularly useful as a film-forming composition for forming a film on the skin consisting of a deposit of powder-containing fibers by electrostatic spraying. In other words, one aspect of the present invention is a film-forming composition for forming a film on the skin consisting of fiber-containing deposits by electrostatic spraying a powder dispersion containing the following components (A), (B), (C), and (E). (A) Powder, (B) One or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups, (C) One or more volatile substances selected from alcohols and ketones, (E) Polymers having fiber-forming ability Furthermore, in order to further stabilize the dispersibility of component (A), it is more preferable to incorporate a polymer having monomer units with an SP value of at least 8.6 or higher and that do not contain a polyglyceryl structure into this film-forming composition.

[0038] 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 even more preferably 0.5% by mass or more, from the viewpoint of maintaining good redispersibility and usability, uniformly supporting the powder in a film consisting of a deposit containing fibers formed by electrostatic spraying, and from the viewpoint of the color development and stability of the color development of the film. Furthermore, from the viewpoint of maintaining good redispersibility and usability, uniformly supporting the powder in a film consisting of a deposit containing fibers formed by electrostatic spraying, and from the viewpoint of the color development and stability of the color development of the film, it is preferably 20% by mass or less, more preferably 10% by mass or less, and even more 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 even more preferably 0.5% by mass or more and 5% by mass or less.

[0039] When the powder dispersion of the present invention is used as a film-forming composition, the content of component (B) is preferably 0.001% by mass or more, more preferably 0.002% by mass or more, and even more preferably 0.005% by mass or more, from the viewpoint of maintaining good redispersibility and usability, uniformly supporting the powder in a film consisting of a deposit containing fibers formed by electrostatic spraying, and from the viewpoint of the color development and stability of the color development of the film. Furthermore, from the viewpoint of maintaining good redispersibility and usability, it is preferably 1% by mass or less, more preferably 0.5% by mass or less, and even more preferably 0.3% by mass or less. Specifically, it is preferably 0.001% by mass or more and 1% by mass or less, more preferably 0.002% by mass or more and 0.5% by mass or less, and even more preferably 0.005% by mass or more and 0.3% by mass or less.

[0040] 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 even more preferably 55% by mass or more, from the viewpoint of maintaining good redispersibility and usability, uniformly supporting the powder in a film consisting of a deposit containing fibers formed by electrostatic spraying, and from the viewpoint of the color development and stability of the film. Furthermore, from the viewpoint of maintaining good redispersibility and usability, uniformly supporting the powder in a film consisting of a deposit containing fibers formed by electrostatic spraying, and from the viewpoint of the color development and stability of the film, it is preferably 95% by mass or less, more preferably 92% by mass or less, even more preferably 90% by mass or less, and even more 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 even more preferably 55% by mass or more and 90% by mass or less.

[0041] 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 0.01% by mass or more, more preferably 0.02% by mass or more, and even more preferably 0.04% by mass or more, from the viewpoint of maintaining good redispersibility and usability, uniformly supporting the powder in a film consisting of a deposit containing fibers formed by electrostatic spraying, and from the viewpoint of the color development and stability of the color development of the film. Furthermore, from the viewpoint of maintaining good redispersibility and usability, uniformly supporting the powder in a film consisting of a deposit containing fibers formed by electrostatic spraying, and from the viewpoint of the color development and stability of the color development of the film, it is preferably 3% by mass or less, more preferably 2% by mass or less, and even more 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 even more preferably 0.04% by mass or more and 0.5% by mass or less.

[0042] When the powder dispersion of the present invention is used as a film-forming composition, the content of component (E) in the composition is preferably 3% by mass or more, more preferably 4% by mass or more, even more preferably 5% by mass or more, and even more preferably 6% by mass or more, from the viewpoint of the ease of forming a film consisting of deposits of powder-containing fibers when electrostatically sprayed, and from the viewpoint of improving the color development of the formed film. Furthermore, it is preferably 45% by mass or less, more preferably 35% by mass or less, even more preferably 30% by mass or less, and even more preferably 20% by mass or less. Specifically, the content of component (E) 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, even more preferably 5% by mass or more and 30% by mass or less, and even more preferably 6% by mass or more and 20% by mass or less.

[0043] The mass ratio ((A) / (D)) of component (A) to component (D) in the film-forming composition of the present invention is more preferably 3 or more, even more preferably 6 or more, even more preferably 8 or more, even more preferably 100 or less, even more preferably 60 or less, and even more preferably 40 or less, from the viewpoint of maintaining good dispersibility and dispersion stability. Specifically, it is more preferably 3 to 100, even more preferably 6 to 60, and even more preferably 8 to 40.

[0044] The mass ratio ((B) / (D)) of component (B) to component (D) in the film-forming composition of the present invention is preferably 0.02 to 8, more preferably 0.04 to 3, and even more preferably 0.07 to 1.3, from the viewpoint of uniformly supporting the powder on a film consisting of a deposit containing fibers formed by electrostatic spraying, improving the color development of the film on the skin, and ensuring that the applied color does not change even after repeated use and remains stable.

[0045] The ratio ((E) / (C)) of the content of component (C) to component (E) in the coating composition of the present invention is preferably 0.04 to 0.6, more preferably 0.05 to 0.5, even more preferably 0.06 to 0.4, and still more preferably 0.08 to 0.3, from the viewpoint of stably forming a deposit containing fibers formed by electrostatic spraying.

[0046] Furthermore, the ratio of ethanol (C) to component (E) in the film-forming composition ((E) / (C)) is preferably 0.04 to 0.6, more preferably 0.05 to 0.5, even more preferably 0.06 to 0.4, and still more preferably 0.08 to 0.3, from the viewpoint of stably forming a deposit containing fibers formed by electrostatic spraying.

[0047] The mass ratio ((E) / (D)) of component (E) to component (D) 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 supporting the powder on a film consisting of a deposit containing fibers formed by electrostatic spraying, improving the color development of the film on the skin, and ensuring that the applied color does not change even after repeated use and remains stable.

[0048] Furthermore, when the powder dispersion of the present invention is used as a powder dispersion for skin and a film-forming composition, an oily agent can be included in the powder dispersion. This oily agent is an oily agent that can be incorporated into cosmetics and is incorporated for the purpose of forming a uniform cosmetic film containing components (A) and (E) on the skin. The aforementioned oils can preferably be polar oils that are liquid at 20°C, and examples include hydrocarbon oils, ester oils, ether oils, higher alcohols, and silicone oils, which can be used individually or in combination of two or more.

[0049] Examples of the hydrocarbon oils include liquid paraffin, squalane, squalene, liquid isoparaffin, n-octane, n-heptane, cyclohexane, and light isoparaffin, with liquid paraffin and squalane being preferred from the viewpoint of usability and adhesion. Furthermore, from the viewpoint of uniformly adhering the film formed by electrostatic spraying to the skin and suppressing color unevenness, isododecane, isohexadecane, and hydrogenated polyisobutene, which have a viscosity of less than 10 mPa·s at 30°C, are preferred. The viscosity here is measured at 30°C using a Type B viscometer (TVB-10 model, manufactured by Toki Sangyo Co., Ltd.) under the following conditions: rotor No. 1, 60 rpm, 1 minute.

[0050] Examples of the ester oils include esters consisting of a linear or branched fatty acid and a linear or branched alcohol or polyhydric alcohol. Specifically, these include 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, cholesteryl 12-hydroxystearylate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid ester, and monoisostearyl ester. N-alkyl glycol dicaprate, neopentyl glycol dicaprate, diisostearyl malate, glyceryl di-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, pentaerythritol tetra-2-ethylhexanoate, glyceryl tri-2-ethylhexanoate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, diethylhexyl naphthalenedicarboxylate, benzoic acid ( C12-C15 alkyl, cetearyl isononanoate, tri(caprylic / capric acid)glycerin, (dicaprylic / capric acid)butylene glycol, glyceryl trilaurate, glyceryl trimiristate, glyceryl tripalmitate, glyceryl triisostearate, glyceryl tri-2-heptylundecanoate, glyceryl tribehenate, glyceryl coconut oil fatty acid, methyl castor oil fatty acid, oleyl oleate, 2-heptylundecyl palmitate, diisobutyl adipate , N-lauroyl-L-glutamic acid-2-octyldodecyl ester, 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, triethyl citrate, 2-ethylhexyl paramethoxycinnamate, tripropylene glycol dipivalate, di(phytosteryl / octyldodecyl) lauroyl glutamate,Examples include dipentaerythrityl tripolyhydroxystearate, dipentaerythrityl pentaisostearate, dipentaerythrityl tetraisostearate, and pentaerythrityl (behenic acid / polyhydroxystearate). Olive oil, jojoba oil, macadamia nut oil, meadowfoam oil, castor oil, safflower oil, sunflower oil, avocado oil, canola oil, apricot kernel oil, rice germ oil, and rice bran oil, which contain one or more ester oils, can also be used.

[0051] 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, alkyl benzoate (C12-C15), caprylic / capric triglyceride, phytosteryl / octyldodecyl lauroyl glutamate, dipentaerythrityl tripolyhydroxystearate, dipentaerythrityl pentaisostearate, dipentaerythrityl tetraisostearate, and pentaerythrityl behenate / polyhydroxystearate. At least one or more selected from the following is preferred, and at least one or more selected from isopropyl myristate, isopropyl palmitate, diisostearyl malate, neopentyl glycol dicaprate, alkyl benzoate (12-15 carbon atoms), caprylic / capric triglyceride, phytosteryl / octyldodecyl lauroyl glutamate, dipentaerythrityl tripolyhydroxystearate, dipentaerythrityl pentaisostearate, dipentaerythrityl tetraisostearate, and pentaerythrityl behenate / polyhydroxystearate is more preferred, and at least one or more selected from neopentyl glycol dicaprate, diisostearyl malate, caprylic / capric triglyceride, and phytosteryl / octyldodecyl lauroyl glutamate is even more preferred.

[0052] Examples of the aforementioned ether oils include cetyl-1,3-dimethylbutyl ether, dicapryl ether, dilauryl ether, and diisostearyl ether.

[0053] Examples of the aforementioned higher alcohols include liquid higher alcohols having 12 to 20 carbon atoms, with branched or unsaturated higher alcohols being preferred. Specifically, examples include isostearyl alcohol, oleyl alcohol, octyldodecanol, and the like.

[0054] Examples of the silicone oil include dimethylpolysiloxane, dimethylcyclopolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, and higher alcohol-modified organopolysiloxane. From the viewpoint of ensuring that the film consisting of a deposit containing fibers formed by electrostatic spraying adheres to the skin, it is preferable that the silicone oil contains at least dimethylpolysiloxane. The kinematic viscosity of silicone oil at 25°C is such that, from the viewpoint of ensuring that the film consisting of fiber-containing deposits formed by electrostatic spray adheres to the skin, 1 mm 2 Preferably 1.5 mm or more 2 / s or more is more preferable, 2mm 2 More preferably / s or higher, 30mm 2 Preferably less than / s, and 20mm 2 / s or less is more preferable, 10mm 2 / s or less is even more preferable.

[0055] From the viewpoint of uniformly adhering the film, which consists of a deposit containing fibers formed by electrostatic spraying, to the skin and improving the color development of the film, the content of the oil agent in the film-forming composition is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, even more preferably 1% by mass or more, even more preferably 3% by mass or more, preferably 30% by mass or less, more preferably 25% by mass or less, even more preferably 18% by mass or less, and even more preferably 15% by mass or less. Furthermore, the mass ratio of the oil to component (E) in the film-forming composition (oil / (E)) is preferably 0.02 or higher, more preferably 0.05 or higher, even more preferably 0.2 or higher, even more preferably 0.5 or higher, preferably 8 or lower, even more preferably 6 or lower, even more preferably 3 or lower, and even more preferably 1.5 or lower.

[0056] The powder dispersion of the present invention, and more particularly the powder dispersion for skin, and especially the film-forming composition, may contain polyols. A polyol is an aliphatic compound having two or more hydroxyl groups. As the polyol, a polyol that is liquid at 20°C is preferred. Specifically, examples include alkylene glycols such as ethylene glycol, propylene glycol, 1,3-propanediol, and 1,3-butanediol; polyalkylene glycols such as diethylene glycol, dipropylene glycol, polyethylene glycol with a molecular weight of 1000 or less, and polypropylene glycol; and glycerin derivatives such as glycerin, diglycerin, and triglycerin. Of these, ethylene glycol, propylene glycol, 1,3-butanediol, dipropylene glycol, polyethylene glycol with a molecular weight of 1000 or less, glycerin, and diglycerin are preferred from the viewpoint of uniformly adhering the film, which consists of a deposit containing fibers formed by electrostatic spraying, to the skin and improving the color development of the film. Polyethylene glycol, propylene glycol, 1,3-butanediol, and glycerin are more preferred, polyethylene glycol with a molecular weight of 1000 or less, propylene glycol, 1,3-butanediol, and glycerin are more preferred, and polyethylene glycol with a molecular weight of 1000 or less is even more 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, preferably 1% by mass or more, preferably 12% by mass or less, more preferably 8% by mass or less, and preferably 5% by mass or less. Furthermore, the mass ratio of the polyol to component (E) in the film-forming composition (polyol / (E)) is preferably 0.02 or higher, more preferably 0.05 or higher, even more preferably 0.2 or higher, preferably 3 or lower, more preferably 2 or lower, and even more preferably 1 or lower, from the viewpoint of uniformly adhering the film, which consists of a deposit containing fibers formed by electrostatic spraying, to the skin and improving the color development of the film.

[0057] In addition to the components described above, the powder dispersion of the present invention may also contain other components. Examples of other components include, in addition to the oil, plasticizers for polymers having fiber-forming ability of component (E), surfactants, fragrances, repellents, antioxidants, stabilizers, preservatives, and various vitamins.

[0058] By electrostatically spraying a powder dispersion containing components (A), (B), (C), and (E) onto an object to be coated, a coating consisting of fiber-containing deposits can be formed on its surface. In other words, one aspect of the present invention comprises the following components (A), (B), (C), and (E): (A) Powder, (B) One or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups, (C) One or more volatile substances selected from alcohols and ketones, and (E) Polymers having fiber-forming ability This is a method for producing a coating, which involves using a powder dispersion containing a certain substance to form a coating on the surface of an object to be coated, consisting of a deposit containing fibers. Furthermore, it is preferable that the powder dispersion used in this manufacturing method contains (D) a polymer having monomer units with an SP value of at least 8.6 or higher and which do not contain a polyglyceryl structure. Here, the objects to be coated include substrates and skin. Accordingly, one embodiment of this invention includes a method for producing a cosmetic coating consisting of a deposit containing fibers on the skin surface, characterized by electrostatically spraying the powder dispersion directly onto the skin.

[0059] When performing the electrostatic spray method, the film-forming composition used has a viscosity of preferably 1 mPa·s or more, more preferably 10 mPa·s or more, and even more preferably 50 mPa·s or more at 25°C. Alternatively, a composition with a viscosity of preferably 5000 mPa·s or less, more preferably 2000 mPa·s or less, and even more preferably 1500 mPa·s or less at 25°C may be used. The viscosity of the film-forming composition is preferably 1 mPa·s or more and 5000 mPa·s or less at 25°C, more preferably 10 mPa·s or more and 1500 mPa·s or less, and even more 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 powder, particularly a porous film consisting of a deposit of powder-containing fibers, can be successfully formed by the electrostatic spray method. The formation of a porous coating containing powder is advantageous in terms of uniform adhesion of the powder-containing coating to the ridges, grooves, and pores of the surface, improved color development, stability of color development, and adhesion of the coating. The viscosity of the coating 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. In that case, rotor No. 43 can be used.

[0060] The film-forming composition is sprayed directly onto an object to be coated, such as a part of human skin where powder makeup is to be applied, by an electrostatic spraying method. Alternatively, the film-forming composition can be sprayed or discharged onto an object to be coated, such as the surface of a resin substrate, by an electrostatic spraying method. The electrostatic spraying method includes the step of electrostatically spraying the film-forming composition onto the skin using an electrostatic spraying device. The electrostatic spraying device basically includes a container for holding the composition, a nozzle for discharging the composition, a supply device for supplying the composition contained in the container to the nozzle, and a power supply for applying voltage to the nozzle.

[0061] Figure 1 shows a schematic diagram illustrating the configuration of an electrostatic spray device preferably 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 is capable of generating a voltage of several volts to more than ten volts. To enhance the portability of the electrostatic spray device 10, the low-voltage power supply 11 is preferably composed of one or more batteries. Various types of batteries can be used, such as dry cell batteries, rechargeable batteries, and storage batteries. Furthermore, using batteries as the low-voltage power supply 11 has the advantage of being easily replaceable as needed. Instead of batteries, an AC adapter or the like can also be used as the low-voltage power supply 11.

[0062] The electrostatic spray device 10 also includes a high-voltage power supply 12. The high-voltage power supply 12 is connected to the low-voltage power supply 11 and includes an electrical circuit (not shown) that boosts the voltage generated by the low-voltage power supply 11 to a high voltage. The boosting electrical circuit generally consists of a transformer, a capacitor, and a semiconductor element.

[0063] The electrostatic spray device 10 is further equipped with an auxiliary electrical circuit 13. The auxiliary electrical circuit 13 is interposed between the 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 to ensure stable operation of the high-voltage power supply 12. Furthermore, the auxiliary electrical circuit 13 has the function of controlling the rotation speed of the motor provided in the microgear pump 14, which will be described later. By controlling the rotation speed of the motor, the amount of spray composition supplied from the container 15 of the film-forming composition, which will be described later, to the microgear pump 14 is controlled. A switch SW is installed between the auxiliary electrical circuit 13 and the low-voltage power supply 11, and the electrostatic spray device 10 can be operated / stopped by turning the switch SW on and off. The supply and control of the supply amount can be handled by any pump; in addition to the microgear pump 14, a piston pump can also be used.

[0064] The electrostatic spray device 10 further includes a nozzle 16. The nozzle 16 is made of various conductive materials, including metals, or non-conductive materials, such as plastics, rubber, and ceramics, and is shaped to allow the discharge of a film-forming composition from its tip. A minute space through which the film-forming composition flows is formed inside the nozzle 16 along its longitudinal direction. The cross-sectional size of this minute space is preferably 100 μm or more and 1000 μm or less in diameter. The nozzle 16 is connected to the microgear pump 14 via a conduit 17. The conduit 17 may be made of a conductive or non-conductive material. The nozzle 16 is also electrically connected to a high-voltage power supply 12. This makes it possible to apply a high voltage to the nozzle 16. In this case, to prevent excessive current from flowing if a person comes into direct contact with the nozzle 16, the nozzle 16 and the high-voltage power supply 12 are electrically connected via a current-limiting resistor 19.

[0065] The microgear pump 14, which is in communication with the nozzle 16 via the conduit 17, functions as a supply device that supplies the film-forming composition contained in the container 15 to the nozzle 16. The microgear pump 14 operates on power supplied from the low-voltage power supply 11. The microgear pump 14 is also configured to supply a predetermined amount of film-forming composition to the nozzle 16 under the control of the auxiliary electrical circuit 13.

[0066] A container 15 is connected to the microgear pump 14 via a flexible conduit 18. The container 15 contains a coating-forming composition. Preferably, the container 15 is in a cartridge-type, replaceable form.

[0067] The electrostatic spray device 10 having the above configuration can be used, for example, as shown in Figure 2. Figure 2 shows a handy type electrostatic spray device 10 that is sized to be held in one hand. In the electrostatic spray device 10 shown in the figure, all the components of the configuration diagram shown in Figure 1 are housed in a cylindrical housing 20. A nozzle (not shown) is located at one end 10a in the longitudinal direction of the housing 20. The nozzle is positioned in the housing 20 so as to be convex toward the skin, with the direction of spraying the composition aligned with the longitudinal direction of the housing 20. By positioning the nozzle tip so as to be convex toward the skin in the longitudinal direction of the housing 20, the coating composition is less likely to adhere to the housing, and a stable coating can be formed.

[0068] When operating the electrostatic spray device 10, the user, that is, the person who will be applying a coating to the area of ​​skin where they intend to apply makeup using electrostatic spray, holds the device 10 in their hand and points one end 10a of the device 10, where the nozzle (not shown) is located, towards the area where the electrostatic spray will be performed. Figure 2 shows the state in which one end 10a of the electrostatic spray device 10 is pointed towards the inside of the user's forearm. In this state, the switch of the device 10 is turned on and the electrostatic spray method is performed. When the device 10 is powered on, an electric field is generated between the nozzle and the skin. In the embodiment shown in Figure 2, a positive high voltage is applied to the nozzle, and the skin becomes the negative electrode. When an electric field is generated between the nozzle and the skin, the coating-forming composition at the tip of the nozzle is polarized by electrostatic induction, and the tip becomes cone-shaped. From the tip of the cone, charged droplets of the coating-forming composition are ejected into the air towards the skin along the electric field. When the solvent component (C) evaporates from the charged film-forming composition discharged into space, the charge density on the surface of the film-forming composition becomes excessive. This causes it to spread into space while repeatedly becoming finer due to Coulomb repulsion, eventually reaching the skin. In this case, by appropriately adjusting the viscosity of the film-forming composition, the sprayed composition can reach the application site in droplet form. Alternatively, while being discharged into space, the volatile solvent can volatilize from the droplet, solidifying the solute polymer with film-forming ability. This solidifies the polymer while it stretches and deforms due to the potential difference, forming fibers, which are then deposited on the application site. For example, increasing the viscosity of the film-forming composition makes it easier to deposit the composition on the application site in the form of fibers. This forms a porous coating on the surface of the application site consisting of a deposit of powder-containing fibers. A porous coating consisting of a deposit of powder-containing fibers can also be formed by adjusting the distance between the nozzle and the skin, or by adjusting the voltage applied to the nozzle.

[0069] In an electrostatic spray device, applying voltage to the nozzle can be done by placing electrodes inside the nozzle or on a part of the nozzle. The voltage applied to the nozzle is preferably 5kV to 30kV, more preferably 7kV to 20kV, and even more preferably 8kV to 16kV, from the viewpoint of forming fibers containing powder. The flow rate of the film-forming composition sprayed (discharged) from the nozzle is preferably 0.4mL / h to 30mL / h, more preferably 0.8mL / h to 20mL / h, and even more preferably 1.2mL / h to 15mL / h, from the viewpoint of good fiber formation. The ratio (F / P) of the voltage applied to the nozzle P (kV) to the flow rate F (mL / h) of the film-forming composition discharged from the nozzle is preferably 0.06 to 1.2, more preferably 0.1 to 1, and even more preferably 0.2 to 0.8, from the viewpoint of good fiber formation.

[0070] During the electrostatic spraying process, a high potential difference is generated between the nozzle and the skin. However, because the impedance is very high, the current flowing through the human body is extremely small. For example, the inventors have confirmed that the current flowing through the human body during the electrostatic spraying process is several orders of magnitude smaller than the current flowing through the human body due to static electricity generated in normal daily life.

[0071] When forming a deposit of powder-containing fibers by electrostatic spraying, the thickness of the fibers, expressed as a circular diameter, is preferably 10 nm or more, more preferably 50 nm or more. It is also preferably 3000 nm or less, and more preferably 1500 nm or less. The thickness of the fibers can be measured, for example, by observing the fibers at 10,000 times magnification using a scanning electron microscope (SEM), removing defects (fiber clumps, fiber intersections, droplets) from the two-dimensional image, selecting 10 fibers arbitrarily, drawing lines perpendicular to the longitudinal direction of the fibers, and directly reading the smallest fiber diameter.

[0072] The coating, which is a deposit of fibers formed by the electrostatic spraying method, has component (A) supported on the constituent fibers. "Component (A) supported on the fibers" means that some or all of component (A) is encapsulated or embedded within the fibers. The content of component (A) in the coating composition depends on the affinity between the fiber-forming polymer and component (A), but generally, if it is between 0.003% by mass and 40% by mass, the constituent fibers adhere well to the skin, and a powder-supported coating with excellent skin conformability is easily formed. On the other hand, if the content of component (A) in the coating composition exceeds 40% by mass, it is difficult for a powder-supported coating to form on the inside of the constituent fibers. When a powder-supported coating is formed on the fibers constituting the coating in this way, the powder is covered by the fibers, causing the coating to tend to become semi-transparent, resulting in a natural appearance with a soft-focus effect. Furthermore, the increased adhesion durability leads to longer-lasting makeup. Furthermore, the effects of adhesion and uniformity of the cosmetic effect due to the powder are further enhanced by the application of the liquid agent, as described later.

[0073] As described above, when a powder composition containing components (A), (B), (C), and (E) is electrostatically sprayed onto the surface of an object to be coated, such as a resin substrate, component (C) volatilizes, and a coating consisting of a deposit containing fibers containing components (A), (B), and (E2), i.e., a fiber sheet, is formed. The resulting fiber sheet can be used as a fiber sheet for application to the skin. Accordingly, one aspect of the present invention is a fiber sheet containing the following components (A), (B), and (E2). (A) Powder, (B) One or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups, (E2) Polymers that make up the fibers The thickness of the fibers constituting this fiber sheet is preferably between 10 nm and 3000 nm in diameter, and such a fiber sheet is particularly preferred as an adhesive fiber sheet. (E2) The polymer that makes up the fiber is component (E), and is the polymer that constitutes the fiber's backbone. The mass ratio (E2 / A) of the polymer (E2) constituting the fibers to component (A) is preferably 1 to 60, more preferably 2 to 40, even more preferably 3 to 30, and still more preferably 4 to 20, from the viewpoint of stably forming a deposit containing fibers formed by electrostatic spraying, and from the viewpoint of improving the color development of the formed film and suppressing cosmetic breakdown. Furthermore, if a composition containing component (D) is used as the film-forming composition, the resulting fiber sheet will also contain component (D).

[0074] The fibers forming the coating are, in principle of manufacturing, infinitely long continuous fibers, but it is preferable that they have a length of at least 100 times their thickness. In this specification, fibers having a length of at least 100 times their thickness are defined as "continuous fibers." Furthermore, it is preferable that the coating produced by the electrostatic spraying method is a porous discontinuous coating consisting of deposits of continuous fibers. Such a coating has the advantage that it can be treated as a single sheet as an aggregate, is very soft, does not easily fall apart even when shear force is applied, and has excellent conformity to body movements. It also has the advantage that the coating can be easily removed completely. In contrast, continuous coatings without pores are not easy to peel off and have poor sweat wicking properties, which may cause dampness on the skin. Moreover, porous discontinuous coatings consisting of aggregates of particles are difficult to remove completely without damaging the skin, as actions such as applying friction to the entire coating are required to completely remove the coating.

[0075] In the electrostatic spraying process using the electrostatic spraying device 10, since the skin is also charged as described above, while component (C) volatilizes, components (A), (B), and (E) reach the skin directly in a charged state. By this electrospinning (electrostatic spinning) technology, it is discharged as continuous fibers and adheres to the skin as a porous deposit. At that time, the powder is carried while maintaining a highly dispersed state within the fibers, and the fibers coat the skin so as to span the dermal papillae and the areas above the dermal papillae on the skin surface and are fixed. Therefore, the powder can be uniformly adhered to and maintained on the skin surface. As a result, since aggregates (soft particle aggregates) of the powder in which component (A) powder is loosely bound to component (B) are formed, they are broken by stirring or the like and protruded in a state of being easily redispersed into the primary particle powder. Not only does the color development as makeup improve dramatically, and the coloring power and hiding power are enhanced, but also a beautiful finish can be achieved. When these aggregates of the powder are left standing, they return to their original state, but they are broken by stirring or the like and redispersed. Therefore, it has been found that the applied color does not change even when used repeatedly and is stable.

[0076] The distance between the nozzle and the skin depends on the voltage applied to the nozzle, but it is preferably 50 mm or more and 150 mm or less for successfully forming the film. The distance between the nozzle and the skin can be measured with a generally used non-contact sensor or the like.

[0077] Regardless of whether the film formed by the electrostatic spraying method is porous or not, the basis weight of the film is preferably 0.1 g / m 2 or more, and more preferably 1 g / m 2 or more. Also, it is preferably 50 g / m 2 or less, and more preferably 40 g / m 2 or less. For example, the basis weight of the film is preferably from 0.1 g / m 2 to 50 g / m 2 or less, and preferably from 1 g / m 2 to 40 g / m 2The following is even more preferable. By setting the basis weight of the coating in this way, the decorative effect of the powder and the adhesion of the coating can be improved.

[0078] Furthermore, the electrostatic spraying step, which involves directly electrostatically spraying the composition onto the skin to form a film, refers to the step of electrostatically spraying onto the skin to form a film, and is preferably an electrospinning step. Other methods for forming a coating include spinning the composition into fibers, preferably electrospinned, in a location other than the skin to produce a sheet made of adhesive fibers composed of a deposit of fibers, which are then applied to or transferred to the skin. This method using an adhesive fiber sheet is different from the electrostatic spraying step described above.

[0079] In the present invention, a liquid application step may be performed before or after the electrostatic spraying step in which a film is formed by electrostatic spraying, or before or after the electrostatic spraying step, in which a liquid containing one or more selected from water, polyol, and oil that is 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 becomes more easily polarized by electrostatic induction, the sprayed film-forming composition adheres more strongly due to electrostatic force, and the transparency of the appearance of the sprayed film-forming composition can be improved. Furthermore, by performing the liquid application step by means other than electrostatic spraying after the electrostatic spraying step, especially immediately after the electrostatic spraying step, the film formed in the electrostatic spraying step becomes more easily absorbed by the liquid, the film adheres more closely to the skin, and its transparency is further improved. The gap between the edge of the film and the skin becomes less likely to occur, which also improves the adhesion between the film and the skin. As a result, even when a coating is formed on areas of skin that stretch and contract greatly, or on areas with high curvature, peeling and tearing are less likely to occur. Preferably, when the coating is a porous coating made of fiber deposits, it adheres well to the skin despite its high porosity, and large capillary forces are easily generated. Furthermore, when the fibers are fine, it becomes easy to increase the specific surface area of ​​the porous coating.

[0080] In the electrostatic spraying process, before and / or after the process of forming a porous coating consisting of fiber deposits, a liquid application process is performed by means other than electrostatic spraying, thereby forming a moisturizing liquid and powder-supported coating in which the moisturizing liquid and powder are present between the fibers forming the porous coating and / or on the fiber surface. This improves the adhesion of the coating. In particular, when the polymer of the fibers constituting the coating is colorless, transparent, or semi-transparent, the coating becomes less visible, but when the powder is colored or white, only the color of the powder is visible, so for example, foundation or point makeup such as blush can appear as natural makeup on the skin. Also, when the coating is colored and opaque, the coating becomes transparent, so it can appear as part of the skin. Note that "colored" includes white.

[0081] When the liquid used in the liquid application process contains water, examples of such liquids include water, aqueous solutions, and aqueous dispersions. Other examples include lotions, emulsions and creams made from emulsified liquids such as O / W emulsions and W / O emulsions, and aqueous solutions thickened with thickeners.

[0082] Aside from electrostatic spraying, various methods can be used to apply a liquid agent containing water or liquid oil to the skin. For example, the liquid agent can be applied to the skin by methods that allow it to be applied to the skin, such as dropping or sprinkling, and if necessary, a step of spreading the liquid agent can be included to allow it to adhere to the skin or film, thereby forming a thin layer of the liquid agent. The step of spreading the liquid agent can be done by methods such as using the user's own fingers or rubbing with a tool such as an applicator. Simply dropping or sprinkling the liquid agent is sufficient, but including a spreading step allows it to adhere to the skin or film, and the adhesion of the film can be greatly improved. Alternatively, the liquid agent can be sprayed onto the skin to form a thin layer of the liquid agent. In this case, a separate spreading step is not particularly necessary, but there is no reason why spreading after spraying should not be performed. Furthermore, when applying the liquid agent after the film has formed, a sufficient amount of the liquid agent should be applied to the skin, and any excess liquid agent can be removed by bringing the sheet material into contact with the area where the liquid agent has been applied.

[0083] The present invention can be used in makeup cosmetics such as makeup bases, foundations, concealers, blushes, eyeshadows, mascaras, eyeliners, eyebrow products, overcoats, and lipsticks; as well as in skincare cosmetics such as sunscreens and other UV protection cosmetics, moisturizing cosmetics, wrinkle-improving cosmetics, whitening cosmetics, sebum-controlling cosmetics, acne care cosmetics, and anti-aging cosmetics. Among these, makeup bases, foundations, concealers, overcoats, and sunscreens are more preferred.

[0084] Although the present invention has been described above based on its preferred embodiments, the present invention is not limited to the above embodiments. For example, in the above embodiments, a person who wants to form a film on their skin grasps the electrostatic spray device 10, and an electric field is generated between the nozzle of the device 10 and the person's skin. However, as long as an electric field is generated between the two, the person who wants to form a film on their skin does not need to grasp the electrostatic spray device 10.

[0085] With regard to the embodiments described above, the present invention further discloses the following methods for manufacturing the coating.

[0086] <1> A powder dispersion containing the following components (A), (B), and (C). (A) Powder, (B) One or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups, (C) One or more volatile substances selected from alcohols and ketones <2> Component (A) is one or more powders selected from hydrophilic powders and hydrophobic powders. <1> The powder dispersion described. <3> Component (B) is one or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups and a molecular weight of 500 or less, and more preferably one or more selected from hydroxycarboxylic acids with 4 to 12 carbon atoms having two to four or more carboxyl groups and aromatic carboxylic acids with 8 to 14 carbon atoms having two to four carboxyl groups. <1> or <2> The powder dispersion described. <4> The mass ratio (A / B) of component (A) to component (B) is preferably 5 to 300, more preferably 10 to 250, and even more preferably 15 to 200. <1> ~ <3> A powder dispersion as described in any of the following. <5> The content of component (A) 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 even more preferably 5% by mass or more and 50% by mass or less. <1> ~ <4> A powder dispersion as described in any of the following. <6> The content of component (B) is preferably 0.01% by mass or more and 10% by mass or less, more preferably 0.05% by mass or more and 7% by mass or less, and even more preferably 0.1% by mass or more and 3% by mass or less. <1> ~ <5> A powder dispersion as described in any of the following. <7> Component (C) contains ethanol <1> ~ <6> A powder dispersion as described in any of the following. <8> The content of component (C) is 35% by mass or more and 95% by mass or less, preferably 40% by mass or more and 93% by mass or less, and more preferably 45% by mass or more and 92% by mass or less. <1> ~ <7> A powder dispersion as described in any of the following. <9> Furthermore, the polymer contains component (D) which has monomer units with an SP value of at least 8.6 or higher and which do not contain a polyglyceryl structure. <1> ~ <8> A powder dispersion as described in any of the following. <10> Component (D) is one or more copolymers selected from acrylic copolymers, methacrylic copolymers, silicone copolymers, and vinyl copolymers having monomer units with an SP value of 8.6 or higher (excluding copolymers having a polyglyceryl structure). <9> The powder dispersion described. <11> Component (D) is one or more copolymers selected from acrylic copolymers, methacrylic copolymers, silicone copolymers, and vinyl copolymers, having monomer units having structures selected from acrylamide, methacrylamide, N-acylalkyleneimine structure, betaine structure, polyethylene structure, and polypropylene structure. <9> The powder dispersion described. <12> The content of component (D) is 0.1% by mass or more and 10% by mass or less, preferably 0.2% by mass or more and 8% by mass or less, and more preferably 0.5% by mass or more and 5% by mass or less. <9> ~ <11> A powder dispersion as described in any of the following. <13> The mass ratio (A / D) of component (A) to component (D) is preferably 5 to 200, more preferably 6 to 100, even more preferably 7 to 50, and even more preferably 8 to 40. <9> ~ <12> A powder dispersion as described in any of the following. <14> Furthermore, it contains component (E) a polymer that has fiber-forming ability. <1> ~ <13> A powder dispersion as described in any of the following. <15> The content of component (E) is 1% by mass or more and 45% by mass or less, preferably 4% by mass or more and 35% by mass or less, preferably 5% by mass or more and 30% by mass or less, and preferably 6% by mass or more and 20% by mass or less. <14> The powder dispersion described. <16> Component (E) is at least one selected from the group consisting of partially saponified polyvinyl alcohol, low-saponification polyvinyl alcohol, fully saponified polyvinyl alcohol, polyvinyl butyral resin, polyurethane resin, polyacrylic resin other than component (D), polymethacrylic resin other than component (D), polyvinyl acetal diethylaminoacetate, and polylactic acid. <14> or <15> The powder dispersion described. <17> The mass ratio of component (E) to component (B) ((E) / (B)) is preferably 1 or more and 150 or less, more preferably 2 or more and 100 or less, even more preferably 3 or more and 80 or less, and even more preferably 4 or more and 60 or less. <14> ~ <16> A powder dispersion as described in any of the following. <18> It is a powder dispersion for skin use. <1> ~ <17> A powder dispersion as described in any of the following. <19> The following components (A), (B), (C), and (E): (A) Powder, (B) One or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups, (C) One or more volatile substances selected from alcohols and ketones, and (E) Polymers having fiber-forming ability A coating-forming composition for forming a film on the skin by electrostatic spraying a powder dispersion containing [a certain substance], which consists of a deposit containing fibers. <20> The content of component (A) is 0.01% by mass or more and 20% by mass or less, preferably 0.1% by mass or more and 10% by mass or less, and more preferably 0.5% by mass or more and 5% by mass or less. <19> The described film-forming composition. <21> The content of component (B) is preferably 0.001% by mass or more and 1% by mass or less, more preferably 0.002% by mass or more and 0.5% by mass or less, and even more preferably 0.005% by mass or more and 0.3% by mass or less. <19> or <20> The described film-forming composition. <22> The content of component (C) is 45% by mass or more and 95% by mass or less, preferably 50% by mass or more and 92% by mass or less, and more preferably 55% by mass or more and 90% by mass or less. <19> ~ <21> A film-forming composition as described in any of the following. <23> The content of component (E) is 3% by mass or more and 45% by mass or less, preferably 4% by mass or more and 35% by mass or less, preferably 5% by mass or more and 30% by mass or less, and preferably 6% by mass or more and 20% by mass or less. <19> ~ <22> A film-forming composition as described in any of the following. <24> Furthermore, the polymer contains component (D) which has monomer units with an SP value of at least 8.6 or higher and which do not contain a polyglyceryl structure. <19> ~ <23> A film-forming composition as described in any of the following. <25> The mass ratio of component (B) to component (D) ((B) / (D)) is preferably 0.02 or more and 8 or less, more preferably 0.04 or more and 3 or less, and even more preferably 0.07 or more and 1.3 or less. <19> ~ <24> A film-forming composition as described in any of the following. <26> The mass ratio of component (A) to component (D) ((A) / (D)) is more preferably 3 or more and 100 or less, even more preferably 6 or more and 60 or less, and even more preferably 8 or more and 40 or less. <19> ~ <25> A film-forming composition as described in any of the following. <27> The following components (A), (B), (C), and (E): (A) Powder, (B) One or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups, (C) One or more volatile substances selected from alcohols and ketones, and (E) Polymers having fiber-forming ability A method for producing a coating, comprising using a powder dispersion containing a certain substance to form a coating on the surface of an object to be coated, comprising deposits containing fibers. <28> The powder dispersion further contains component (D) a polymer having monomer units with an SP value of at least 8.6 or higher and which do not contain a polyglyceryl structure. <27> A method for manufacturing the described coating. <29> A fiber sheet containing the following components (A), (B), and (E2). (A) Powder, (B) One or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups, (E2) Polymers that make up the fibers <30> The thickness of the fibers constituting the sheet is between 10 nm and 3000 nm in terms of the diameter of a circle. <29> The fiber sheet described. <31> Furthermore, the polymer contains component (D) which has monomer units with an SP value of at least 8.6 or higher and which do not contain a polyglyceryl structure. <30> The fiber sheet described. [Examples]

[0087] The present invention will now be described in more detail with reference to examples, but the present invention is not limited to these examples. It is not something that is done. Unless otherwise specified, "%" means "mass%".

[0088] (Manufacturing example) Poly(N-propionylethyleneimine) modified silicone 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 a nitrogen atmosphere under reflux for 8 hours to synthesize terminally reactive poly(N-propionylethyleneimine). A 50% ethyl acetate solution containing 250 g (0.065 mol as amino groups) of side-chain primary aminopropyl-modified polydimethylsiloxane (weight-average molecular weight 60000, amine equivalent 3870) was added in one go and heated under reflux for 12 hours. The number-average molecular weight measured by GPC was 5400. The reaction mixture was concentrated under reduced pressure to obtain the N-propionylethyleneimine-dimethylsiloxane copolymer as a pale yellow, rubbery solid (505 g, 97% yield). The mass ratio of organopolysiloxane segments in the final product was 0.51, and the weight-average molecular weight of the final product was 88400.

[0089] [Test Example 1] [Examples 1-15 and Comparative Examples 1-4] The powder dispersions listed in Tables 1 to 5 were prepared. 〔evaluation〕 (1) Evaluation of the sedimentation state after storage For the powder dispersions shown in Tables 1 to 5, the sedimentation state was visually evaluated after standing at 60°C for 3 days following manufacturing. A: It has formed a bulky sediment. The supernatant is clear. B: It has formed a bulky sediment. The supernatant is cloudy. C: A thin sedimentation layer is formed at the bottom. (2) Evaluation of redispersibility after storage For the powder dispersions shown in Tables 1 to 5, the dispersions were left to stand at 60°C for 3 days after manufacturing, shaken for 30 seconds (with stirring balls), and the persistence of sediment (solid matter) at the bottom after shaking was visually evaluated. A: No precipitate. The solution is homogeneous. B: There is almost no sediment. The solution is almost homogeneous. C: The sediment is difficult to break down and remains slightly on the walls and bottom. D: A large amount of sediment remains on the walls and bottom.

[0090] [Test Example 2] [Examples 16-36 and Comparative Examples 5-8] The film-forming compositions described in Tables 6 to 11 were manufactured. 〔evaluation〕 (1) Height of the settled powder phase after storage at 60°C for 3 days For the film-forming compositions listed in Tables 6 to 11, the compositions were stored at 60°C for 3 days after manufacturing, and the ratio of the powder phase to the liquid height was calculated. Specifically, 9 ml of the aforementioned film-forming composition is filled into a Maruemu Co., Ltd. PP container No. 3 (container capacity 9 ml), and the height of the liquid after filling is 45 mm. The powder phase with poor redispersibility settles over time and aggregates at the bottom of the container, as in the comparative example, so the visible powder phase appears to be 0%. However, the easily dispersible powder phase, as in the example, allows for the confirmation of a powder phase with flocculation. (2) Evaluation of redispersibility after storage For the film-forming compositions listed in Tables 6 to 11, the mixtures were left to stand at 60°C for 3 days after manufacturing, shaken for 30 seconds (with stirring balls), and the persistence of the sediment (solid matter) at the bottom after shaking was visually evaluated. A: No precipitate. The solution is homogeneous. B: There is almost no sediment. The solution is almost homogeneous. C: The sediment is difficult to break down and remains slightly on the walls and bottom. D: A large amount of sediment remains on the walls and bottom. (3) The film-forming composition was electrostatically sprayed onto a substrate, and the coverage (color development) of the resulting film was evaluated. A: The color of the circuit board is concealed, and the colors are clearly visible. B: The color of the circuit board is somewhat obscured, and the color is visible. C: The color of the circuit board is not very well concealed and does not show up well. D: The color of the circuit board is hardly concealed and barely shows any color. (4) The film-forming composition was left to stand at 60°C for one week, and then a coating film was formed by electrostatic spraying onto a substrate. The color change between this coating film and a coating film made immediately after manufacturing was visually evaluated. A: There is almost no change from the paint film immediately after manufacturing. B: The coating may change slightly from its initial state after manufacturing, but this is not a problem. C: The paint film has changed slightly from its original color immediately after manufacturing, and the difference in finish is noticeable. D: The color of the paint film changes significantly from the time of manufacture, and the difference in the finished product is quite noticeable.

[0091] Electrostatic spraying process An electrostatic spraying apparatus 10, having the configuration shown in Figure 1 and the appearance shown in Figure 2, was used to perform electrostatic spraying on a resin substrate for 20 seconds. The conditions for the electrostatic spraying method were as follows. • Applied voltage: 10kV • Distance between conductive nozzle and substrate: 100 mm ·Discharge rate of film-forming composition: 5mL / h ·Environment: 25℃, 30%RH This electrostatic spraying process formed a porous coating consisting of fiber deposits on the surface of the resin substrate. The coating was a circle with a diameter of approximately 4 cm and a mass of approximately 5.5 mg. The fiber thickness, measured by the method described above, was 1 μm.

[0092] [Table 1]

[0093] Table 2

[0094] Table 3

[0095] Table 4

[0096] Table 5

[0097] Table 6

[0098] Table 7

[0099] Table 8

[0100] Table 9

[0101] Table 10

[0102] Table 11

[0103] [Test Example 3] The film-forming composition of Formulation Example 1 was electrostatically sprayed onto a substrate to produce a fiber sheet, and its coverage (color development) was evaluated and found to be good. [Prescription Example 1] Dimethicone-treated titanium dioxide (Manufactured by Miyoshi Chemical Co., Ltd., SA treatment; manufactured by Ishihara Sangyo Co., Ltd., CR-50) 1.81% Dimethicone-treated yellow iron oxide 0.24% Dimethicone-treated red iron oxide 0.11% Triethoxycaprylylsilane-treated titanium dioxide microparticles (Manufactured by Sakai Chemical Industry Co., Ltd., STR-100W-OTS) 2.0% Citric acid 0.05% (Manufacturing example) Poly(N-propionylethyleneimine) modified silicone 0.79% Ethanol 83.3% Polyvinyl butyral (Sekisui Chemical Co., Ltd., Esrec B BM-1) 11.2% Polyoxyethylene hydrogenated castor oil (Kao Corporation, Emanon CH-60(K)) 0.5% [Explanation of Symbols]

[0104] 10 Electrostatic spray device 11 Low-voltage power supply 12 High-voltage power supply 13. Auxiliary Electrical Circuits 14 Micro Gear Pump 15 Container 16 nozzles 17 Conduit 18 Flexible conduits 19 Current-limiting resistor 20 cabinets

Claims

1. The following components (A), (B), (C), and (E): (A) Powder, (B) One or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups, (C) One or more volatile substances selected from alcohols and ketones, and (E) Polymers having fiber-forming ability A coating-forming composition for forming a film on the skin by electrostatic spraying a powder dispersion containing [a certain substance], which consists of a deposit containing fibers.

2. The film-forming composition according to claim 1, wherein the mass ratio (A / B) of component (A) to component (B) in the dispersion is 5 or more and 300 or less.

3. The film-forming composition according to claim 1, wherein the content of component (B) is 0.001% by mass or more and 1% by mass or less, and the content of component (C) is 45% by mass or more and 95% by mass or less.

4. The film-forming composition according to claim 1, further comprising component (D) a polymer having monomer units with an SP value of at least 8.6 or higher and which do not contain a polyglyceryl structure.

5. The film-forming composition according to claim 4, wherein component (D) is one or more copolymers selected from acrylic copolymers, methacrylic copolymers, silicone copolymers, and vinyl copolymers, having monomer units having a structure selected from acrylamide, methacrylamide, N-acylalkyleneimine structure, betaine structure, polyethylene structure, and polypropylene structure.

6. The coating composition according to claim 4, wherein the content of component (D) is 0.1% by mass or more and 10% by mass or less.

7. A method for producing a coating, comprising forming a coating on the surface of an object to be coated using a coating-forming composition according to any one of claims 1 to 6, the coating consisting of a deposit containing fibers.

8. A fiber sheet containing the following components (A), (B), and (E2). (A) Powder, (B) One or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups, (E2) Polymers that make up the fibers

9. The fiber sheet according to claim 8, wherein the thickness of the fibers constituting the sheet is 10 nm or more and 3000 nm or less in terms of the diameter of a circle.

10. A powder dispersion containing the following components (A), (B), and (C). (A) Powder, (B) One or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups, (C) One or more volatile substances selected from alcohols and ketones

11. The powder dispersion according to claim 10, further comprising component (D) a polymer having monomer units with an SP value of at least 8.6 or higher and which do not contain a polyglyceryl structure.

12. The powder dispersion according to claim 10, further containing component (E) a polymer having fiber-forming ability.

13. A powder dispersion for skin use, according to any one of claims 10 to 12.

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