Composition for forming coating film

Abstract

The present invention relates to a coating film-forming composition for forming a coating film comprising a fiber-containing deposit on the skin by electrostatically spraying a powder dispersion containing the following components (A), (B), (C), and (E): (A) a powder; (B) one or more types selected from a hydroxycarboxylic acid having two or more carboxyl groups and an aromatic carboxylic acid; (C) one or more volatile substances selected from alcohols and ketones; and (E) a polymer having a fiber-forming ability.

Description

Technical Field

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

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

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

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

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

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

[0007] (A) Powder;

[0008] (B) one or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups;

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

[0010] (E) A polymer having fiber-forming ability.

[0011] [2] A method for producing a coating, wherein a coating composed of a deposit containing fibers is formed on a surface of an object to be coated using a powder dispersion containing the following components (A), (B), (C) and (E),

[0012] (A) Powder;

[0013] (B) one or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups;

[0014] (C) one or more volatile substances selected from alcohols and ketones; and

[0015] (E) A polymer having fiber-forming ability.

[0016] [3] A fiber sheet comprising the following components (A), (B) and (E2):

[0017] (A) Powder;

[0018] (B) one or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups; and

[0019] (E2) Polymer constituting the fiber.

[0020] [4] A powder dispersion comprising the following components (A), (B) and (C):

[0021] (A) Powder;

[0022] (B) one or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups; and

[0023] (C) One or more volatile substances selected from alcohols and ketones. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram showing the structure of an electrostatic spray device preferably used in the present invention.

[0025] Figure 2 This is a schematic diagram showing the state of performing the electrostatic spray method using an electrostatic spray device. DETAILED DESCRIPTION

[0026] The powder dispersion (sprayable composition) described in Patent Document 1 is prone to high viscosity and precipitation in the above-mentioned volatile substances, and has problems with redispersibility and stability during storage. For example, when using the powder dispersion (sprayable composition) to form a coating, it is known that there are problems such as reduced color development when used as makeup, and color deviation of the applied color each time it is used after static storage.

[0027] The present invention provides a film-forming composition which has improved color development when used as makeup when a film is formed by spraying with an electrostatic spray and does not change the coating color even when used after being left to stand.

[0028] The inventors added various ingredients when dispersing the powder in a volatile substance, and studied its redispersibility and usability. As a result, it was found that by formulating carboxylic acids with a specific structure, a loosely bound powder agglomerate (soft particle aggregate) can be formed. Although the agglomerate will form a precipitate, it will be destroyed by stirring, etc., and it is easy to redisperse, and a powder dispersion with excellent usability can be obtained. In addition, if the powder agglomerate is left standing, it will return to its original state, but it will be destroyed and redispersed by stirring, etc. In addition, it was found that if a film-forming composition obtained by formulating a polymer with fiber-forming ability in the powder dispersion is electrostatically sprayed, a film with improved makeup color development and no coating color change due to repeated use can be obtained.

[0029] The film-forming composition of the present invention forms a film composed of a deposit of fibers containing powder by electrostatic spraying, and the color rendering of the obtained film is improved, and even if it is used after being left to stand, the coating color does not change, and the stability is excellent. In addition, for the powder dispersion of the present invention, the powder in the dispersion forms a fluffy powder layer, which improves the redispersibility and usability.

[0030] As described above, the present invention relates to a film-forming composition, a film-producing method, a fiber sheet, and a powder dispersion. First, the powder dispersion will be described.

[0031] One embodiment of the present invention is a powder dispersion containing the following components (A), (B) and (C):

[0032] (A) Powder;

[0033] (B) one or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups; and

[0034] (C) One or more volatile substances selected from alcohols and ketones.

[0035] The powder of the present invention may be any powder commonly used in cosmetics, and there are no particular limitations on the shape such as spherical, plate-like, needle-like, particle size such as smoke-like, microparticles, pigment-grade, and particle structure such as porous, non-porous, etc. In addition, any kind of organic powder or inorganic powder may be used, any kind of hydrophilic powder or hydrophobic powder may be used, and any kind of hydrophilized powder or hydrophobized powder may be used.

[0036] Here, the so-called "hydrophilic powder" generally refers to, for example, a powder that has the property of settling or dispersing in water when water and powder are mixed. In addition, the so-called "hydrophobic powder" generally refers to a powder that has the property of not mixing quickly and floating on the water surface when water and powder are mixed.

[0037] Specific examples of inorganic powders include: colored pigments such as red iron oxide, iron hydroxide, iron titanate, yellow iron oxide, black iron oxide, carbon black, Prussian blue, ultramarine, manganese violet, cobalt violet, chromium oxide, chromium hydroxide, cobalt oxide, and cobalt titanate; titanium oxide, zinc oxide, zirconium oxide, magnesium oxide, cerium oxide, aluminum oxide, barium sulfate, calcium sulfate, magnesium sulfate, magnesium carbonate, calcium carbonate, talc, mica, kaolin, sericite, silicic acid, anhydrous silicic acid, aluminum silicate, magnesium silicate, magnesium aluminum silicate, calcium silicate, barium silicate, strontium silicate, metal tungstate, hydroxyapatite, vermiculite, bentonite, montmorillonite, hectorite, smectite, zeolite, ceramic powder, phosphoric acid White or body pigments such as calcium hydroxide, aluminum oxide, silicon dioxide, aluminum hydroxide, boron nitride, and synthetic sericite; fish scale foil, titanium oxide-coated mica (mica titanium), bismuth oxychloride, titanium oxide-coated bismuth oxychloride, titanium oxide-coated talc, titanium oxide-coated colored mica, titanium oxide-coated iron oxide-coated mica, mica titanium coated with microparticles of titanium oxide, mica titanium coated with microparticles of zinc oxide, mica titanium treated with organic pigments, mica coated with low-order titanium oxide, mica, synthetic mica coated with titanium oxide, plate-like silica coated with titanium oxide, hollow plate-like titanium oxide, mica coated with iron oxide, plate-like iron oxide (MIO), aluminum flakes, stainless steel flakes, titanium oxide-coated plate-like aluminum oxide, pearl shells, gold foil, gold-plated resin film, metal-deposited resin film, and other pearlescent pigments (bright powder).

[0038] In addition, regarding organic powders, examples include: silicone resin, polymethylsilsesquioxane, nylon powder, silk powder, urethane powder, cellulose powder and other organic powders; Red No. 104, Red No. 102, Red No. 226, Red No. 201, Red No. 202, Yellow No. 4, Black No. 401 and other organic tar pigments, organic pigments and their lakes, and one or more of these can be used.

[0039] The powders used in the present invention can be used directly, or one or more of them can be treated to be hydrophobic. The hydrophobic treatment is not limited to any treatment that is usually performed on cosmetic powders. For example, a surface treatment agent such as a fluorine compound, a silicone compound, a metal soap, an amino acid compound, lecithin, an alkyl silane, an oil, an organic titanate, etc. can be used to perform dry treatment, wet treatment, etc.

[0040] Specific examples of the surface treatment agent include: fluorine compounds such as perfluoropolyether, perfluoroalkyl phosphate, perfluoroalkyl alkoxysilane, and fluorine-modified silicone; silicone compounds such as dimethylpolysiloxane, methylhydrogenpolysiloxane, cyclic silicone, unilateral or bilaterally terminal trialkoxy-modified organopolysiloxane, cross-linked silicone, silicone resin, fluorine-modified silicone resin, and acrylic modified silicone; metal soaps such as aluminum stearate, aluminum myristate, zinc stearate, and magnesium stearate; amino acid compounds such as proline, hydroxyproline, alanine, glycine, sarcosine, glutamic acid, aspartic acid, lysine, and derivatives thereof; lecithin, hydrogenated lecithin; alkyl silanes such as methyltrimethoxysilane, ethyltrimethoxysilane, hexyltrimethoxysilane, octyltrimethoxysilane, and octyltriethoxysilane; oils such as polyisobutylene, wax, and grease; organic titanates such as isopropyl titanium triisostearate, and the like.

[0041] The powder used in the present invention can be a product obtained by hydrophilizing one or more of these. There are no restrictions on the hydrophilizing treatment as long as it is a treatment performed on ordinary cosmetic powders. Examples include: plant polymers such as gum arabic, tragacanth, arabinogalactan, locust bean gum (carob gum), guar gum, karaya gum, carrageenan, pectin, agar, quince seeds (marumero), starch (rice, corn, potato, wheat), alginate, tragacanth gum, locust bean gum; microbial polymers such as xanthan gum, dextran, succinoglucan, pullulan; animal polymers such as collagen, casein, albumin, deoxyribonucleic acid (DNA) and its salts; starch polymers such as carboxymethyl starch and methyl hydroxypropyl starch; methyl cellulose, ethyl Cellulose-based polymers such as cellulose, methylhydroxypropyl cellulose, carboxymethyl cellulose, hydroxymethyl cellulose, hydroxypropyl cellulose, nitrocellulose, sodium cellulose sulfate, sodium carboxymethyl cellulose, crystalline cellulose, and cellulose powder; alginic acid-based polymers such as sodium alginate and propylene glycol alginate; vinyl-based polymers such as polyvinyl methyl ether, polyvinyl pyrrolidone, and carboxyvinyl polymer; polyoxyethylene-based polymers such as polyethylene glycol and polyethylene glycol silane; and inorganic silicic acid compounds such as silicon dioxide.

[0042] The average particle size of the powder of component (A) is not particularly limited. However, when the powder dispersion of the present invention is used as a skin cosmetic, the average particle size is preferably 0.001 μm to 200 μm, more preferably 0.01 μm to 50 μm, further preferably 0.02 μm to 20 μm, and further more preferably 0.05 μm to 15 μm, from the viewpoint of uniformly adhering to the papules, furrows, and pores of the skin to give a natural makeup feel.

[0043] In the present invention, for the average particle diameter of powder, electron microscope observation or laser diffraction / scattering method is used to measure by particle size distribution measuring instrument. Specifically, in the case of laser diffraction / scattering method, ethanol is used as dispersion medium, laser diffraction scattering type particle size distribution measuring device (for example, SEISHIN enterprise company system, LMS-350) is used to measure. In addition, in the case of hydrophobic treatment being carried out to powder, the average particle diameter and content of component (A) refer to the average particle diameter and quality including hydrophobic treatment agent.

[0044] The content of component (A) in the powder dispersion of the present invention is preferably an amount in which the component (A) can exert its function, and 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 further preferably 5% by mass or more. In addition, 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 further preferably 50% by mass or less. Specifically, it is preferably 1% by mass or more and 60% by mass or less, more preferably 3% by mass or more and 55% by mass or less, and further preferably 5% by mass or more and 50% by mass or less.

[0045] The 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. It is believed that these specific carboxylic acids can form a fluffy powder layer (flocculation) for the powder dispersed in the component (C), making it easy to disperse. 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.

[0046] 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. Specific examples include malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, fumaric acid, oxalic acid, and trimesic acid.

[0047] More preferred are hydroxycarboxylic acids having 4 to 12 carbon atoms and having 2 to 4 carboxyl groups, and aromatic carboxylic acids having 8 to 14 carbon atoms and having 2 to 4 carboxyl groups, and still more preferred are malic acid, citric acid, and trimesic acid.

[0048] 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 further preferably 0.1% by mass or more, from the viewpoint of maintaining good redispersibility and usability of component (A) in the powder dispersion. In addition, 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 further preferably 3% by mass or less. Specifically, for example, 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 further preferably 0.1% by mass or more and 3% by mass or less.

[0049] In the powder dispersion of the present invention, from the viewpoint of maintaining good redispersibility and usability of the component (A) in the powder dispersion, the mass ratio of the component (A) to the component (B) ((A) / (B)) is preferably 5 or more, more preferably 10 or more, and even more preferably 15 or more, and is preferably 300 or less, more preferably 250 or less, and even more preferably 200 or less. Specifically, it is preferably 5 or more and 300 or less, more preferably 10 or more and 250 or less, and even more preferably 15 or more and 200 or less.

[0050] The component (C) used in the powder dispersion of the present invention is one or more volatile substances selected from alcohols and ketones. The so-called "volatile substance" here refers to a substance that easily volatilizes into the atmosphere at normal temperature and pressure. Among them, regarding alcohols, it is preferred to use, for example: monovalent chain aliphatic alcohols, monovalent cyclic aliphatic alcohols, and monovalent aromatic alcohols. Regarding monovalent chain aliphatic alcohols, for example, C1-C6 alcohols can be mentioned; regarding monovalent cyclic alcohols, for example, C4-C6 cyclic alcohols can be mentioned; regarding monovalent aromatic alcohols, for example, benzyl alcohol, phenylethyl alcohol, etc. can be mentioned. Regarding specific examples of these, for example: ethanol, isopropanol, butanol, phenylethyl alcohol, n-propanol, n-pentanol, etc. can be mentioned. For these alcohols, one or more selected from these can be used. Among the volatile substances of component (C), alcohols do not contain polyhydric alcohols belonging to polyvalent alcohols.

[0051] Among the volatile substances of component (C), ketones include, for example, di-C1-C4 alkyl ketones (for example, acetone, methyl ethyl ketone, methyl isobutyl ketone, etc.) These ketones may be used alone or in combination of two or more.

[0052] The volatile substance as component (C) is more preferably one or more selected from ethanol, isopropanol and butanol, further preferably one or more selected from ethanol and butanol, and further more preferably contains at least ethanol.

[0053] The content of component (C) in the powder dispersion of the present invention is preferably 35% by mass or more, more preferably 40% by mass or more, and further preferably 45% by mass or more, from the viewpoint of maintaining the redispersibility and usability of component (A) in the powder dispersion. In addition, it is preferably 95% by mass or less, more preferably 93% by mass or less, further preferably 92% by mass or less, and further more preferably 85% by mass or less. Specifically, the content of component (C) is preferably 35% by mass or more and 95% by mass or less, more preferably 40% by mass or more and 93% by mass or less, and further preferably 45% by mass or more and 92% by mass or less.

[0054] When the component (E) described later is contained, the content of the component (C) in the powder dispersion is preferably 85% by mass or less.

[0055] In addition, the volatile matter of component (C) preferably contains ethanol, and in this case, the content of ethanol is preferably 50% by mass or more, more preferably 65% ​​by mass or more, and further preferably 80% by mass or more, and further preferably 100% by mass or less, relative to the total amount of the volatile matter of component (C). The content of ethanol is preferably 50% by mass or more and 100% by mass or less, more preferably 65% ​​by mass or more and 100% by mass or less, and further preferably 80% by mass or more and 100% by mass or less, relative to the total amount of the volatile matter of component (C).

[0056] In order to make the dispersibility of the component (A) more stable, it is more preferred that the component (D) in the powder dispersion of the present invention contains at least a polymer having an SP value of 8.6 or more and containing no monomer unit of a polyglycerol structure.

[0057] That is, one embodiment of the present invention is a powder dispersion containing the following components (A), (B), (C), and (D):

[0058] (A) Powder;

[0059] (B) one or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups;

[0060] (C) one or more volatile substances selected from alcohols and ketones;

[0061] (D) A polymer having at least a monomer unit having an SP value of 8.6 or more and not containing a polyglycerol structure.

[0062] SP value is a solubility parameter. It is considered that when the component (D) polymer has a monomer unit with an SP value of 8.6 or more (excluding a monomer unit having a polyglycerol structure), the aggregation and precipitation of the component (A) hydrophilic powder in the component (C) (volatile substance) can be suppressed.

[0063] The component (D) polymer prevents the powder from agglomerating and settling in the powder dispersion by interacting with the component (A) powder, and is not the polymer having fiber-forming ability (E) described later which has fiber-forming ability when the powder dispersion is electrostatically sprayed.

[0064] In addition, the polymer as component (D) is preferably soluble or dispersible in ethanol.

[0065] The polymer of component (D) may be a homopolymer or a copolymer, and is preferably a copolymer having a monomer unit having an SP value of 8.6 or more.

[0066] The copolymer of component (D) is preferably one or more copolymers selected from acrylic copolymers, methacrylic copolymers, silicone copolymers and vinyl copolymers (excluding copolymers having a polyglycerol structure), and these copolymers have at least a monomer unit having an SP value of 8.6 or more.

[0067] The monomer unit having an SP value of 8.6 or more is more preferably a monomer unit having a structure selected from acrylamide, methacrylamide, an N-acylalkyleneimine structure, a betaine structure, a polyethylene structure, and a polypropylene structure.

[0068] Therefore, component (D) is more preferably a copolymer of one or more selected from acrylic copolymers, methacrylic copolymers, silicone copolymers and vinyl copolymers, and these copolymers have a monomer unit containing a structure selected from acrylamide, methacrylamide, N-acylalkyleneimine structure, betaine structure, polyethylene structure and polypropylene structure.

[0069] Specifically, examples include (octylacrylamide / hydroxypropyl acrylate / butylaminoethyl methacrylate) copolymer, (alkyl acrylate·octylacrylamide) copolymer, (acrylate / tert-butylacrylamide) copolymer, PEG / PPG-20 / 22 butyl ether polydimethylsiloxane, (VA / crotonic acid / vinyl neodecanoate) copolymer, (methacrylate ethyl betaine / acrylate) copolymer, poly(N-formylethyleneimine)organosiloxane, poly(N-acetylethyleneimine)organosiloxane, poly(N-propionylethyleneimine)organosiloxane, etc., and preferably include (octylacrylamide / hydroxypropyl acrylate / butylaminoethyl methacrylate) copolymer, (alkyl acrylate·octylacrylamide) copolymer, and poly(N-propionylethyleneimine)organosiloxane.

[0070] The content of component (D) in the powder dispersion of the present invention is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, and further preferably 0.5% by mass or more from the viewpoint of maintaining good dispersibility and dispersion stability of component (A) in the powder dispersion. In addition, from the viewpoint of maintaining good dispersibility and dispersion stability, it is preferably 20% by mass or less, more preferably 15% by mass or less, and further preferably 10% by mass or less. Specifically, it is preferably 0.1% by mass or more and 20% by mass or less, more preferably 0.2% by mass or more and 15% by mass or less, and further preferably 0.5% by mass or more and 10% by mass or less.

[0071] In the powder dispersion of the present invention, from the viewpoint of maintaining the dispersibility and dispersion stability of the component (A) in the powder dispersion well, the mass ratio (A / D) of the component (A) to the component (D) is preferably 5 or more and 200 or less. From the viewpoint of maintaining the above-mentioned dispersibility and dispersion stability well, the mass ratio (A / D) is more preferably 6 or more, further preferably 7 or more, further more preferably 8 or more, and is preferably 100 or less, more preferably 50 or less, and further preferably 40 or less. Specifically, it is preferably 6 or more and 100 or less, more preferably 7 or more and 50 or less, and further preferably 8 or more and 40 or less.

[0072] One embodiment of the powder dispersion of the present invention is a powder dispersion containing, in addition to the above-mentioned components (A), (B) and (C), a component (E) of a polymer having fiber-forming ability. That is, one embodiment is a powder dispersion containing the following components (A), (B), (C) and (E):

[0073] (A) Powder;

[0074] (B) one or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups;

[0075] (C) one or more volatile substances selected from alcohols and ketones;

[0076] (E) A polymer having fiber-forming ability.

[0077] The powder dispersion is useful as a powder dispersion for skin, i.e., a skin cosmetic, and is particularly useful as a film-forming composition for forming a film composed of a deposit of fibers containing component (E) as a main component on the skin by electrostatic spraying. In addition, the electrostatic spraying method is preferably an electrostatic spinning method. In addition, the composition used in the electrostatic spraying may also be referred to as a "spraying composition" or a "spinning composition". "Spraying" includes not only the case of spitting out in a mist form, but also the case of applying an electric charge to extend the spitted liquid and spitting out in a fibrous form.

[0078] The component (E) used here is a polymer having fiber-forming ability, which is a substance that can be dissolved in the volatile substance of the component (C), and is a polymer having the ability to form fibers when subjected to electrostatic spraying. That is, it is a component that becomes a constituent component of the continuous fiber, and a polymer that becomes the main component of the fiber. Here, the so-called "dissolved" means that it is in a dispersed state at 20°C, and the dispersed state is observed to be uniform, preferably in a transparent or translucent state. Component (E) is a polymer other than component (D), and constitutes the main component of the continuous fiber.

[0079] As a polymer having fiber-forming ability, an appropriate polymer can be used according to the properties of the volatile substance of component (C). Specifically, polymers having fiber-forming ability can be roughly divided into water-soluble polymers and water-insoluble polymers. In this specification, the so-called "water-soluble polymer" refers to a polymer having the following properties: under an environment of 1 atmosphere and 23°C, after weighing 1g of the polymer, it is immersed in 10g of ion exchange water, and after 24 hours, more than 0.5g of the immersed polymer is dissolved in water. On the other hand, in this specification, the so-called "water-insoluble polymer" refers to a polymer having the following properties: under an environment of 1 atmosphere and 23°C, after weighing 1g of the polymer, it is immersed in 10g of ion exchange water, and after 24 hours, more than 0.5g of the immersed polymer is not dissolved.

[0080] Examples of water-soluble polymers having fiber-forming ability include: pullulan, hyaluronic acid, chondroitin sulfate, poly-γ-glutamic acid, modified corn starch, β-glucan, oligosaccharide, heparin, keratan sulfate and other mucopolysaccharides; cellulose, pectin, xylan, lignin, glucomannan, galacturonic acid, psyllium seed gum, tamarind gum, gum arabic, tragacanth gum, soybean water-soluble polysaccharides, alginic acid, carrageenan, laminarin, agarose, fucoidan sulfate, methylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose and other natural polymers; partially saponified polyvinyl alcohol (when a cross-linking agent is not used in combination), polyvinyl pyrrolidone (PVP), polyethylene oxide, sodium polyacrylate and other synthetic polymers, etc. These water-soluble polymers may be used alone or in combination of two or more. Among these water-soluble polymers, from the viewpoint of easily manufacturing a film composed of a deposit of fibers containing powder by electrostatic spraying, it is preferred to use pullulan and partially saponified polyvinyl alcohol, polyvinyl pyrrolidone and polyethylene oxide and other synthetic polymers. When polyethylene oxide is used as a water-soluble polymer, its number average molecular weight is preferably 50,000 to 3,000,000, more preferably 100,000 to 2,500,000.

[0081] On the other hand, examples of water-insoluble polymers capable of forming fibers include: fully saponified polyvinyl alcohol that can be insolubilized after forming a film composed of a deposit of fibers; partially saponified polyvinyl alcohol that can be cross-linked after the film is formed by using a cross-linking agent; and polyesters such as polyvinyl acetal diethylaminoacetate, zein (the main component of zein), and polylactic acid (PLA); polyacrylonitrile resins; polyacrylic resins other than component (D) such as polymethacrylic resins; polystyrene resins, polyvinyl butyral resins, polyethylene terephthalate resins, polybutylene terephthalate resins, polyurethane resins, polyamide resins, polyimide resins, and polyamide-imide resins. These water-insoluble polymers can be used alone or in combination of two or more.

[0082] Among these water-insoluble polymers, it is preferred to use one or more selected from partially saponified polyvinyl alcohol, completely saponified polyvinyl alcohol, polyvinyl butyral resin, polyurethane resin, polyacrylic acid resin other than component (D), polymethacrylic acid resin other than component (D), polyvinyl acetal diethylaminoacetate and polylactic acid. It is more preferred to use one or more selected from polyvinyl butyral resin, polymethacrylic acid resin other than component (D) and polyurethane resin. It is further preferred to contain polyvinyl butyral resin. It is even more preferred to contain polyvinyl butyral resin as the main component.

[0083] Regarding the content of component (E) in the powder dispersion of the present invention, from the viewpoint of making the above-mentioned redispersibility and usability good, the viewpoint of the formation of the film composed of the deposit of the fiber containing the powder during electrostatic spraying, and the improvement of the color development of the formed film, it is preferably 1% by mass or more, more preferably 4% by mass or more, further preferably 5% by mass or more, and further more preferably 6% by mass or more. In addition, it is preferably 45% by mass or less, more preferably 35% by mass or less, further preferably 30% by mass or less, and further more preferably 20% by mass or less. Specifically, the content of component (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, further preferably 5% by mass or more and 30% by mass or less, and further more preferably 6% by mass or more and 20% by mass or less.

[0084] The mass ratio of the component (E) to the component (B) and the content ratio of the component (E) to the component (B) ((E) / (B)) in the powder dispersion of the present invention are preferably 1 to 150, more preferably 2 to 100, further preferably 3 to 80, and still further preferably 4 to 60, from the viewpoints of the above-mentioned redispersibility and usability, and from the viewpoint of forming a coating film uniformly supporting the powder.

[0085] In order to further stabilize the dispersibility of the component (A) in the powder dispersion, it is more preferred to mix the component (D) with a polymer having at least an SP value of 8.6 or more and containing no monomer unit of a polyglycerol structure.

[0086] The powder dispersion is useful as a powder dispersion for skin, that is, a skin cosmetic, and is particularly useful as a film-forming composition for forming a film composed of deposits of fibers containing powder on the skin by electrostatic spraying.

[0087] That is, one embodiment of the present invention is a film-forming composition for forming a film composed of a fiber-containing deposit on the skin by electrostatically spraying a powder dispersion containing the following components (A), (B), (C) and (E),

[0088] (A) Powder;

[0089] (B) one or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups;

[0090] (C) one or more volatile substances selected from alcohols and ketones;

[0091] (E) A polymer having fiber-forming ability.

[0092] In order to further stabilize the dispersibility of the component (A) in the film-forming composition, it is more preferred to mix the component (D) with at least a polymer having an SP value of 8.6 or more and containing no monomer unit of a polyglycerol structure.

[0093] 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 more preferably 0.5% by mass or more, from the viewpoint of maintaining the above-mentioned redispersibility and usability well, allowing the powder to be uniformly carried in the film formed by the fiber-containing deposit formed by electrostatic spraying, and the color development of the film. The stability of color development, etc., it is preferably 20% by mass or less, more preferably 10% by mass or less, and 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 more preferably 0.5% by mass or more and 5% by mass or less.

[0094] When the powder dispersion of the present invention is used as a film-forming composition, from the viewpoint of maintaining redispersibility and usability well, allowing the powder to be uniformly carried in the film formed by the deposit of fiber-containing deposits formed by electrostatic spraying, and the color development of the film, the stability of the color development, etc., the content of component (B) is preferably 0.001 mass % or more, more preferably 0.002 mass % or more, and more preferably 0.005 mass % or more. In addition, from the viewpoint of maintaining redispersibility and usability well, it is preferably 1 mass % or less, more preferably 0.5 mass % or less, and more preferably 0.3 mass % or less. Specifically, it is preferably 0.001 mass % or more and 1 mass % or less, more preferably 0.002 mass % or more and 0.5 mass % or less, and more preferably 0.005 mass % or more and 0.3 mass % or less.

[0095] When the powder dispersion of the present invention is used as a film-forming composition, the content of component (C) in the composition is preferably 45% by mass or more, more preferably 50% by mass or more, and further preferably 55% by mass or more, from the viewpoint of maintaining the above-mentioned redispersibility and usability well, allowing the powder to be uniformly carried in the film formed by the fiber-containing deposit formed by electrostatic spraying, and the color development of the film, the stability of the color development, etc. In addition, from the viewpoint of maintaining the above-mentioned redispersibility and usability well, allowing the powder to be uniformly carried in the film formed by the fiber-containing deposit formed by electrostatic spraying, and the color development of the film, the stability of the color development, etc., it is preferably 95% by mass or less, more preferably 92% by mass or less, more preferably 90% by mass or less, and further preferably 85% by mass or less. Specifically, it is preferably 45% by mass or more and 95% by mass or less, more preferably 50% by mass or more and 92% by mass or less, and further preferably 55% by mass or more and 90% by mass or less.

[0096] 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 more preferably 0.04% by mass or more, from the viewpoint of maintaining the above-mentioned redispersibility and usability well, allowing the powder to be uniformly carried in the film composed of the fiber-containing deposit formed by electrostatic spraying, and the color development of the film. The stability of color development, etc., it is preferably 3% by mass or less, more preferably 2% by mass or less, and 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 more preferably 0.04% by mass or more and 0.5% by mass or less.

[0097] When the powder dispersion of the present invention is used as a film-forming composition, about the content of component (E) in the composition, from the viewpoint of the formation of the film composed of the deposit of the fiber containing the powder during electrostatic spraying and the improvement of the color development of the formed film, preferably 3% by mass or more, more preferably 4% by mass or more, more preferably 5% by mass or more, and more preferably 6% by mass or more. In addition, preferably 45% by mass or less, more preferably 35% by mass or less, more preferably 30% by mass or less, and more preferably 20% by mass or less. Specifically, the content of component (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, more preferably 5% by mass or more and 30% by mass or less, and more preferably 6% by mass or more and 20% by mass or less.

[0098] The mass ratio ((A) / (D)) of the component (A) to the component (D) in the film-forming composition of the present invention is preferably 3 or more, more preferably 6 or more, and even more preferably 8 or more, and is preferably 100 or less, more preferably 60 or less, and even more preferably 40 or less, from the viewpoint of maintaining the above-mentioned dispersibility and dispersion stability well. Specifically, it is preferably 3 or more and 100 or less, more preferably 6 or more and 60 or less, and even more preferably 8 or more and 40 or less.

[0099] The mass ratio of component (B) to component (D) ((B) / (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 carrying the powder on the film composed of the fiber-containing deposit formed by electrostatic spraying, improving the color of the film on the skin, and maintaining stability in the coating color even after repeated use.

[0100] Regarding the content ratio of component (C) to component (E) in the film-forming composition of the present invention ((E) / (C)), from the viewpoint of stably forming a fiber-containing deposit formed by electrostatic spraying, it is preferably from 0.04 to 0.6, more preferably from 0.05 to 0.5, further preferably from 0.06 to 0.4, and further more preferably from 0.08 to 0.3.

[0101] In addition, from the viewpoint of stably forming a fiber-containing deposit formed by electrostatic spraying, the content ratio of ethanol (C) to component (E) in the film-forming composition ((E) / (C)) is preferably from 0.04 to 0.6, more preferably from 0.05 to 0.5, further preferably from 0.06 to 0.4, and further more preferably from 0.08 to 0.3.

[0102] The mass ratio of component (E) to component (D) ((E) / (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 carrying the powder on the film composed of the fiber-containing deposit formed by electrostatic spraying, improving the color of the film on the skin, and maintaining the coating color stable even after repeated use.

[0103] When the powder dispersion of the present invention is used as a powder dispersion for skin and a film-forming composition, the powder dispersion may contain an oily agent. The oily agent is an oily agent that can be formulated into cosmetics, and the purpose of formulation is to form a uniform cosmetic film containing component (A) and component (E) on the skin.

[0104] As the oil agent, a polar oil that is liquid at 20° C. is preferably used, and examples thereof include hydrocarbon oil, ester oil, ether oil, higher alcohol, and silicone oil. One type may be used alone, or two or more types may be used in combination.

[0105] Examples of the hydrocarbon oil include liquid paraffin, squalane, squalene, liquid isoparaffin, n-octane, n-heptane, cyclohexane, and light isoparaffin. From the perspective of feel and adhesion, liquid paraffin and squalane are preferred. From the perspective of making the film formed by electrostatic spraying adhere evenly to the skin and suppressing color unevenness, isododecane, isohexadecane, and hydrogenated polyisobutene having a viscosity of less than 10 mPa·s at 30° C. are preferred.

[0106] The viscosity was measured at 30° C. using a B-type viscometer (TVB-10 model, manufactured by Toki Sangyo Co., Ltd., measurement conditions: rotor No. 1, 60 rpm, 1 minute).

[0107] The ester oils include, for example, esters formed from straight-chain or branched fatty acids and straight-chain or branched alcohols or polyols. Specifically, for example, isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, 12-hydroxystearate cholesterol, ethylene di(2-ethylhexanoate), dipentaerythritol fatty acid esters, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, di(2-heptyl Undecanoic acid) glyceryl, tri(2-ethylhexanoic acid) trimethylolpropane, triisostearate trimethylolpropane, pentaerythritol tetra(2-ethylhexanoate), tri(2-ethylhexanoic acid) glyceryl, triisostearate trimethylolpropane, 2-ethylhexanoic acid cetyl, palmitic acid-2-ethylhexyl, diethylhexyl naphthalene dicarboxylate, benzoic acid (carbon number 12-15) alkyl esters, isononanoic acid cetearyl, tri(caprylic acid / capric acid) glyceryl, (dicaprylic acid / capric acid) butylene glycol ester, trilaurin, trimyristin, tripalmitin, triisostearate Glycerol, tri(2-heptylundecanoic acid)glyceryl, tribehenic acid glyceryl, tri(coconut oil fatty acid)glyceryl, castor oil fatty acid methyl ester, oleyl oleate, palmitic acid-2-heptylundecyl ester, diisobutyl adipate, N-lauroyl-L-glutamate-2-octyldodecyl ester, adipate di(2-heptylundecyl)ester, ethyl laurate, sebacate di(2-ethylhexyl)ester, myristic acid-2-hexyldecyl ester, palmitic acid-2-hexyldecyl ester, adipate-2-hexyldecyl ester, sebacate diisopropyl, succinic acid di(2-ethylhexyl)ester, citric acid triethyl citrate, 2-ethylhexyl p-methoxycinnamate, tripropylene glycol di(trimethylacetate), di(phytosteryl / octyldodecanol) lauroyl glutamate, dipentaerythritol tri(polyhydroxystearic acid), dipentaerythritol pentaisostearate, dipentaerythritol tetraisostearate, pentaerythritol (behenic acid / polyhydroxystearic acid) ester, etc., and for example: olive oil containing one or more ester oils, jojoba oil, macadamia oil, meadowfoam seed oil, castor oil, safflower oil, sunflower oil, avocado oil, canola oil, almond oil, rice germ oil, rice bran oil, etc. can also be used.

[0108] 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 (12 to 15 carbon atoms), tri(caprylic acid / capric acid)glyceryl, di(phytosteryl / octyldodecanol) lauroyl glutamate, dipentaerythritol tri(polyhydroxystearic acid), dipentaerythritol pentaisostearate, dipentaerythritol tetraisostearate, (behenic acid / The present invention further comprises at least one or more selected from pentaerythritol (polyhydroxystearic acid) esters, more preferably at least one or more selected from isopropyl myristate, isopropyl palmitate, diisostearyl malate, neopentyl glycol dicaprate, benzoic acid (carbon number 12 to 15) alkyl esters, tri(caprylic acid / capric acid)glyceryl, di(phytosteryl / octyldodecanol) lauroyl glutamate, dipentaerythritol tri(polyhydroxystearic acid), dipentaerythritol pentaisostearate, dipentaerythritol tetraisostearate, and pentaerythritol (behenic acid / polyhydroxystearic acid) esters, and further preferably at least one or more selected from neopentyl glycol dicaprate, diisostearyl malate, tri(caprylic acid / capric acid)glyceryl, and di(phytosteryl / octyldodecanol) lauroyl glutamate.

[0109] Examples of the ether oil include cetyl-1,3-dimethylbutyl ether, dioctyl ether, dilauryl ether, and diisostearyl ether.

[0110] Examples of the higher alcohol include liquid higher alcohols having 12 to 20 carbon atoms, preferably branched or unsaturated higher alcohols, and specific examples thereof include isostearyl alcohol, oleyl alcohol, octyldodecanol, and the like.

[0111] Examples of the silicone oil include dimethylpolysiloxane, dimethylcyclopolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, and higher alcohol-modified organopolysiloxane. From the viewpoint of allowing the film composed of fiber-containing deposits formed by electrostatic spraying to adhere to the skin, it is preferred that at least dimethylpolysiloxane is contained.

[0112] The kinematic viscosity of silicone oil at 25° C. is preferably 1 mm / s from the viewpoint of allowing the film composed of the fiber-containing deposit formed by electrostatic spraying to adhere to the skin. 2 / s or more, more preferably 1.5 mm 2 / s or more, more preferably 2 mm 2 / s or more, preferably 30mm 2 / s or less, more preferably 20 mm 2 / s or less, more preferably 10 mm 2 / s or less.

[0113] The content of the oily agent is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, further preferably 1% by mass or more, and further preferably 3% by mass or more, in the film-forming composition, from the viewpoint of enabling the film composed of the fiber-containing deposit formed by electrostatic spraying to adhere evenly to the skin and improving the color development of the film. It is also preferably 30% by mass or less, more preferably 25% by mass or less, further preferably 18% by mass or less, and further more preferably 15% by mass or less.

[0114] In addition, from the viewpoint of enabling the film composed of the fiber-containing deposit formed by electrostatic spraying to adhere evenly to the skin and improving the color development of the film, the mass ratio of the above-mentioned oil agent to the component (E) in the film-forming composition (oil agent / (E)) is preferably 0.02 or more, more preferably 0.05 or more, further preferably 0.2 or more, further more preferably 0.5 or more, and is preferably 8 or less, more preferably 6 or less, further preferably 3 or less, further more preferably 1.5 or less.

[0115] The powder dispersion of the present invention (especially the powder dispersion for skin, especially the film-forming composition) may contain a polyol. The so-called "polyol" refers to an aliphatic compound having two or more hydroxyl groups. As the polyol, a polyol that is liquid at 20°C is preferred. Specifically, examples include: ethylene glycol, propylene glycol, 1,3-propanediol, 1,3-butanediol and other alkanediols; diethylene glycol, dipropylene glycol, polyethylene glycol with a molecular weight of less than 1000, polypropylene glycol and other polyalkylene glycols; glycerols such as glycerol, diglycerol, triglycerol, etc. Among these, from the viewpoint of making the film composed of the fiber-containing deposit formed by electrostatic spraying uniformly adhere to the skin and improving the color development of the film, ethylene glycol, propylene glycol, 1,3-butylene glycol, dipropylene glycol, polyethylene glycol with a molecular weight of 1000 or less, glycerol, and diglycerol are preferred, and polyethylene glycol, propylene glycol, 1,3-butylene glycol, and glycerol with a molecular weight of 1000 or less are more preferred, and polyethylene glycol with a molecular weight of 1000 or less is further preferred. The content of the polyol in the film-forming composition is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, and further preferably 1% by mass or more, and is preferably 12% by mass or less, more preferably 8% by mass or less, and further preferably 5% by mass or less.

[0116] In addition, the mass ratio of the content of the above-mentioned polyol and component (E) in the film-forming composition (polyol / (E)) is preferably 0.02 or more, more preferably 0.05 or more, and further preferably 0.2 or more, from the viewpoint of enabling the film composed of the fiber-containing deposit formed by electrostatic spraying to adhere evenly to the skin and improving the color development of the film. In addition, it is preferably 3 or less, more preferably 2 or less, and further preferably 1 or less.

[0117] The powder dispersion of the present invention may further contain other ingredients in addition to the above-mentioned ingredients. Regarding other ingredients, in addition to the above-mentioned oil, for example, plasticizers for polymers having fiber-forming ability for component (E), surfactants, fragrances, insect repellents, antioxidants, stabilizers, preservatives, various vitamins, etc. may be mentioned.

[0118] When a powder dispersion containing components (A), (B), (C) and (E) is electrostatically sprayed onto an object to be coated, a coating composed of a deposit containing fibers can be formed on the surface.

[0119] That is, one embodiment of the present invention is a method for producing a film, wherein a film composed of a deposit containing fibers is formed on a surface of a film-forming object using a powder dispersion containing the following components (A), (B), (C) and (E),

[0120] (A) Powder;

[0121] (B) one or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups;

[0122] (C) one or more volatile substances selected from alcohols and ketones; and

[0123] (E) A polymer having fiber-forming ability.

[0124] In addition, it is preferred that (D) a polymer having at least a monomer unit having an SP value of 8.6 or more and not containing a polyglycerol structure is blended in the powder dispersion used in the production method.

[0125] Here, the film-forming object includes a substrate and skin. Therefore, one embodiment includes a method for producing a cosmetic film, characterized in that the powder dispersion is electrostatically sprayed directly onto the skin to form a cosmetic film composed of a fiber-containing deposit on the skin surface.

[0126] When the electrostatic spray method is performed, a film-forming composition having a viscosity at 25°C of preferably 1 mPa·s or more, more preferably 10 mPa·s or more, and further preferably 50 mPa·s or more is used. In addition, a film-forming composition having a viscosity at 25°C of preferably 5000 mPa·s or less, more preferably 2000 mPa·s or less, and further preferably 1500 mPa·s or less is used. The viscosity of the film-forming composition at 25°C is preferably 1 mPa·s or more and 5000 mPa·s or less, more preferably 10 mPa·s or more and 1500 mPa·s or less, and further preferably 50 mPa·s or more and 1200 mPa·s or less. By using a film-forming composition having a viscosity within this range, a porous film containing a powder, especially a porous film composed of a deposit of fibers containing a powder, can be smoothly formed by an electrostatic spray method. From the perspectives of uniform adhesion of the powder-containing film to the skin hillocks, skin grooves, and capillaries, as well as improvement in color development, stability of color development, and adhesion of the film, it is advantageous to form a porous film containing powder. The viscosity of the film-forming composition is measured at 25° C. using an E-type viscometer. For example, an E-type viscometer manufactured by Tokyo Keiki Co., Ltd. can be used. As a rotor at this time, rotor No. 43 can be used.

[0127] The film-forming composition is sprayed directly onto the film-forming object, such as the part of the human skin where the powder is to be applied to make-up, by electrostatic spraying. In addition, the film-forming composition is sprayed or spit out onto the film-forming object, such as the surface of a resin substrate, by electrostatic spraying. The electrostatic spraying method includes the step of electrostatically spraying the film-forming composition onto the skin using an electrostatic spray device. The electrostatic spray device basically comprises: a container for storing the above-mentioned composition, a nozzle for spitting out the above-mentioned composition, a supply device for supplying the above-mentioned composition stored in the above-mentioned container to the above-mentioned nozzle, and a power source for applying voltage to the above-mentioned nozzle.

[0128] Figure 1 This is a schematic diagram showing the structure of an electrostatic spray device that is suitably used in the present invention. The electrostatic spray device 10 shown in the figure is equipped with a low-voltage power supply 11. The low-voltage power supply 11 can generate a voltage of several V to more than ten V. In order to improve the portability of the electrostatic spray device 10, the low-voltage power supply 11 is preferably composed of one or more batteries. As the battery, various batteries such as dry cells, rechargeable batteries, and storage batteries can be used. In addition, by using a battery as the low-voltage power supply 11, there is also an advantage that it can be easily replaced as needed. Instead of a battery, an AC adapter or the like can be used as the low-voltage power supply 11.

[0129] 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 a circuit (not shown) for boosting the voltage generated by the low voltage power supply 11 to a high voltage. The boost circuit is generally composed of transistors, capacitors, semiconductor elements, and the like.

[0130] The electrostatic spray device 10 is further provided with an auxiliary circuit 13. The auxiliary circuit 13 is between the above-mentioned low-voltage power supply 11 and the high-voltage power supply 12, and has the function of adjusting the voltage of the low-voltage power supply 11 so that the high-voltage power supply 12 can work stably. In addition, the auxiliary circuit 13 has the function of controlling the number of revolutions of the motor possessed by the micro gear pump 14 described later. The supply amount of the spray composition from the film-forming composition container 15 described later to the micro gear pump 14 is controlled by controlling the number of revolutions of the motor. A switch SW is installed between the auxiliary circuit 13 and the low-voltage power supply 11, and the electrostatic spray device 10 can be operated / stopped by turning on / off the switch SW. In addition, for the control of the supply and supply amount of the spray composition, as long as a pump is used, a piston pump can also be used in addition to the micro gear pump 14.

[0131] The electrostatic spray device 10 further includes a nozzle 16. The nozzle 16 is composed of various conductors represented by metal or non-conductors such as plastics, rubber, and ceramics, and is formed into a shape that can discharge the film-forming composition from its front end. A small space is formed in the nozzle 16 along the long side direction of the nozzle 16 to allow the film-forming composition to flow. The size of the cross section of the small space is represented by a diameter, preferably 100 μm or more and 1000 μm or less.

[0132] The nozzle 16 is connected to the micro gear pump 14 via a pipe 17. The pipe 17 may be a conductor or a non-conductor. In addition, the nozzle 16 is electrically connected to the high voltage power supply 12. Thus, a high voltage can be applied to the nozzle 16. In this case, in order to prevent a large current from flowing when the nozzle 16 directly touches the human body, the nozzle 16 is electrically connected to the high voltage power supply 12 via a current limiting resistor 19.

[0133] The micro gear pump 14 connected to the nozzle 16 via the pipe 17 has a function as a supply device for supplying the film-forming composition contained in the container 15 to the nozzle 16. The micro gear pump 14 receives power supply from the low voltage power supply 11 and operates. In addition, the micro gear pump 14 is configured to receive control from the auxiliary circuit 13 and supply a predetermined amount of the film-forming composition to the nozzle 16.

[0134] The micro gear pump 14 is connected to the container 15 via a flexible tube 18. The film-forming composition is stored in the container 15. The container 15 is preferably a replaceable cassette.

[0135] The electrostatic spray device 10 having the above structure can be used, for example, Figure 2 Use as shown. Figure 2 The electrostatic spray device 10 shown in the figure is a handheld electrostatic spray device 10 having a size that can be held in one hand. Figure 1 All components of the structure shown in the figure are housed in a cylindrical frame 20. A nozzle (not shown) is disposed at one end 10a in the long side direction of the frame 20. The nozzle is disposed in the frame 20 so that the blowing direction of the composition is consistent with the longitudinal direction of the frame 20 and is convex toward the skin side. By arranging so that the front end of the nozzle is convex toward the skin in the longitudinal direction of the frame 20, the film-forming composition is not easily attached to the frame, and a film can be stably formed.

[0136] When the electrostatic spray device 10 is in operation, the user (i.e., a person who wants to use electrostatic spray to form a film on the area of ​​the skin where powder makeup is applied) holds the device 10 in his hand and points one end 10a of the device 10 equipped with a nozzle (not shown) toward the application area for electrostatic spraying. Figure 2 The electrostatic spray device 10 is shown in a state where one end 10a is directed toward the inner side of the user's forearm. In this state, the device 10 is turned on to perform the electrostatic spray method. When the device 10 is powered on, an electric field is generated between the nozzle and the skin. Figure 2 In the embodiment shown, a positive high voltage is applied to the nozzle, and the skin becomes the negative electrode. When an electric field is generated between the nozzle and the skin, the film-forming composition at the front end of the nozzle is polarized by electrostatic induction, and the front end portion becomes a cone, and the droplets of the charged film-forming composition are spit out into the air from the front end of the cone along the electric field toward the skin. The solvent, i.e., component (C), continues to evaporate from the charged film-forming composition spit out into the space, and the charge density on the surface of the film-forming composition becomes excessive, while repeatedly miniaturizing by using Coulomb repulsion, while expanding in the space, and reaching the skin. In this case, by appropriately adjusting the viscosity of the film-forming composition, the sprayed composition can be made to reach the application site in a droplet state. Alternatively, it can also be: during the period of spitting out into the space, the solvent, i.e., the volatile substance, is volatilized from the droplets, while the solute, i.e., the polymer having the ability to form a film, is solidified, while the potential difference is used to stretch and deform it to form fibers, and the fibers are deposited at the application site. For example, if the viscosity of the film-forming composition is increased, the composition can be easily deposited in the form of fibers on the application site. Thus, a porous film composed of a deposit of fibers containing powder is formed on the surface of the application site. A porous film composed of a deposit of fibers containing powder can also be formed by adjusting the distance between the nozzle and the skin or adjusting the voltage applied to the nozzle.

[0137] When applying voltage to the nozzle in the electrostatic spray device, for example, an electrode is arranged inside the nozzle, or an electrode is arranged on a part of the nozzle. From the perspective of forming a fiber containing powder, the voltage applied to the nozzle is preferably 5 kV or more and 30 kV or less, more preferably 7 kV or more and 20 kV or less, and further preferably 8 kV or more and 16 kV or less. From the perspective of the formability of the fiber containing powder, the flow rate of the film-forming composition sprayed (ejected) from the nozzle is preferably 0.4 mL / h or more and 30 mL / h or less, more preferably 0.8 mL / h or more and 20 mL / h or less, and further preferably 1.2 mL / h or more and 15 mL / h or less. In addition, from the perspective of good fiber formation, the ratio (F / P) of the voltage P (kV) applied to the nozzle and the flow rate F (mL / h) of the film-forming composition ejected from the nozzle is preferably 0.06 or more and 1.2 or less, more preferably 0.1 to 1, and further preferably 0.2 to 0.8.

[0138] During the electrostatic spraying process, a high potential difference is generated between the nozzle and the skin. However, since the impedance is very large, the current flowing through the human body is extremely small. 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 daily life.

[0139] When a deposit of powder-containing fibers is formed by an electrostatic spray method, the thickness of the fibers, when expressed as an equivalent circular diameter, is preferably 10 nm or more, more preferably 50 nm or more. In addition, it is preferably 3000 nm or less, more preferably 1500 nm or less. The thickness of the fibers can be measured by, for example, observing them with a scanning electron microscope (SEM), magnifying them 10,000 times, removing defects (fiber blocks, fiber intersections, droplets) from the two-dimensional image, randomly selecting 10 fibers, drawing a line orthogonal to the long side direction of the fibers, and directly reading the minimum fiber diameter.

[0140] In the fiber deposit, i.e., the film, formed by the electrostatic spraying method, component (A) is carried on the constituent fibers. The so-called "carrying component (A) on the fiber" means that a part or all of component (A) is contained or buried in the fiber. Regarding the content of component (A) in the film-forming composition, although it also depends on the affinity between the polymer having fiber-forming ability and component (A), if it is about 0.003% by mass and below 40% by mass, the constituent fibers have high adhesion to the skin, and a film carrying powder with excellent skin followability can be easily formed. On the other hand, if the content of component (A) in the film-forming composition exceeds 40% by mass, it is not easy to form a film carrying powder on the inner side of the constituent fibers. In this way, if a film carrying powder is formed on the fibers constituting the film, since the powder is covered by the fibers, there is a tendency for the film to be translucent, which is close to a natural appearance with a soft focus effect. In addition, because the persistence of adhesion is improved, the setting feeling of continuous makeup can be achieved. Furthermore, by applying a liquid agent described later, the effects of adhesion and uniformity of the makeup effect by the powder can be further enhanced.

[0141] As described above, when a powder composition containing component (A), component (B), component (C) and component (E) is electrostatically sprayed onto the surface of a film-forming object, such as a substrate such as a resin, component (C) is volatilized to form a film, i.e., a fiber sheet, composed of a deposit of fibers containing component (A), component (B) and component (E). The obtained fiber sheet can be used as a fiber sheet for skin application.

[0142] Therefore, one embodiment of the present invention is a fiber sheet comprising the following components (A), (B) and (E2):

[0143] (A) Powder;

[0144] (B) one or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups;

[0145] (E2) Polymer constituting the fiber.

[0146] The thickness of the fibers constituting the fiber sheet is preferably 10 nm or more and 3000 nm or less in terms of equivalent circle diameter, and such a fiber sheet is particularly suitable as a fiber sheet for adhesive bonding.

[0147] (E2) The fiber-constituting polymer is the component (E), which is a polymer constituting the fiber skeleton.

[0148] Regarding the mass ratio (E2) / (A) of the polymer (E2) and component (A) constituting the fiber, from the viewpoint of stably forming a fiber-containing deposit formed by electrostatic spraying, improving the color rendering of the formed coating, and inhibiting makeup coming off, it is preferably from 1 to 60, more preferably from 2 to 40, further preferably from 3 to 30, and further more preferably from 4 to 20.

[0149] When the film-forming composition contains the component (D), the obtained fiber sheet also contains the component (D).

[0150] The above-mentioned fibers forming the coating will become infinitely long continuous fibers from the manufacturing principle, but preferably have a length of at least 100 times the thickness of the fiber. In this specification, a fiber having a length of more than 100 times the thickness of the fiber is defined as a "continuous fiber". Therefore, the coating manufactured by the electrostatic spray method is preferably a porous discontinuous coating composed of a deposit of continuous fibers. This form of coating is not only formed into an aggregate and used as a thin sheet, but also has the characteristics of being very soft, not easy to loosen even if shear force is applied to it, and has the advantages of excellent tracking of body movements. In addition, it also has the advantage that the coating can be easily and completely removed. In contrast, a continuous coating without pores is not easy to peel off, and has low sweat dissipation, so there is a possibility of stuffiness on the skin. In addition, for a porous discontinuous coating composed of a particle aggregate, in order to completely remove the coating, it is necessary to take actions such as applying friction to the entire coating, which is difficult to completely remove without damaging the skin.

[0151] In the electrostatic spraying step using the electrostatic spray device 10, as described above, because the skin is also charged, the film-forming composition that has become fibrous by electrostatic spraying volatilizes component (C) while components (A), (B) and (E) directly reach the skin in a charged state. Through the electrostatic spinning (electrospinning) technology, it is spit out as continuous fibers, forming a porous deposit on the skin and adhering to it. At this time, the powder is carried in the fiber in a state of maintaining high dispersibility, and the skin is coated and fixed in a manner that the fibers are spread over the skin texture of the skin surface and on the skin texture, so that the powder can be evenly attached and maintained on the skin surface.

[0152] As a result, it was found that: because the powder of component (A) forms a powder agglomerate (soft particle aggregate) loosely combined with component (B), it is destroyed by stirring and is easily redispersed into a state of primary particle powder, thereby greatly improving the color rendering of the makeup. Not only can the coloring power and hiding power be improved, but a beautiful makeup feeling can also be achieved. If the powder agglomerate is left to stand, it will return to its original state, but it can be destroyed and redispersed by stirring, so that the coating color does not change even when used repeatedly, and the performance is stable.

[0153] The distance between the nozzle and the skin depends on the voltage applied to the nozzle, but is preferably 50 mm to 150 mm from the viewpoint of being able to form a good coating all the time. The distance between the nozzle and the skin can be measured using a commonly used non-contact sensor or the like.

[0154] Regardless of whether the film formed by the electrostatic spraying method is porous or not, the weight per unit area of ​​the film is preferably 0.1 g / m 2 More preferably 1 g / m 2 In addition, it is preferably 50g / m 2 Below, more preferably 40g / m 2 For example, the weight per unit area of ​​the coating is preferably 0.1 g / m 2 Above and 50g / m 2 Less than 1 g / m 2 Above and 40g / m 2 By setting the weight per unit area of ​​the film in this manner, the makeup effect of the powder and the adhesion of the film can be improved.

[0155] The “electrostatic spraying step of electrostatically spraying the composition directly onto the skin to form a film” refers to a step of electrostatically spraying the composition onto the skin to form a film, and is preferably a step of performing electrostatic spinning.

[0156] As another method for forming a film, there can be mentioned a method including the steps of spinning, preferably electrospinning, a composition at a place other than the skin to produce a sheet of adhesive fibers which is composed of a deposit of fibers and is transferred to the skin when used, and then applying or transferring the adhesive fiber sheet to the skin. This method of using an adhesive fiber sheet is a method different from the above-mentioned electrostatic spraying step.

[0157] In the present invention, the following step may also be performed: before or after the electrostatic spraying step of forming the film by the above-mentioned electrostatic spraying, or before or after the electrostatic spraying step, a liquid application step containing one or more liquids selected from water, polyols, and oils that are liquid at 20°C is applied to the skin by means other than electrostatic spraying. By applying the liquid before the electrostatic spraying step, the skin surface can be more easily polarized by electrostatic induction, the sprayed film-forming composition can be more easily strongly attached by electrostatic force, and the transparency of the appearance of the sprayed film-forming composition can be improved. In addition, after the electrostatic spraying step, especially just after the electrostatic spraying step, by performing the liquid application step by means other than electrostatic spraying, the film formed by the electrostatic spraying step can be easily fused with the skin by the liquid, so that the film is strongly attached to the skin and the transparency is further improved. It is not easy to have a height difference between the end of the film and the skin, thereby also improving the adhesion between the film and the skin. As a result, even if the film is formed on a part of the skin where the skin has a large degree of expansion and contraction or a part with a large curvature, it is still not easy to peel off, break, etc. Preferably, when the film is a porous film composed of fiber deposits, the film has a high fit with the skin despite the high porosity, and a large capillary force is easily generated. In addition, when the fibers are fine, it is easy to achieve a high specific surface area of ​​the porous film.

[0158] Before and / or after the step of forming a porous coating composed of fiber deposits in the electrostatic spraying step, by performing a liquid application step by means other than electrostatic spraying, a coating carrying a moisturizing liquid and a powder can be formed, wherein the moisturizing liquid and the powder are present between the fibers forming the porous coating and / or on the fiber surface. Thus, the adhesion of the coating is improved. In particular, when the polymer of the fiber constituting the coating is colorless, transparent, or translucent, although it is more difficult to identify the coating, in the case where the powder is a colored powder or a white powder, since only the color of the powder can be identified, for example, foundation or local makeup products can make the color of the cheeks, etc. present a natural makeup feeling on the skin. In addition, when the coating is colored and opaque, since the coating has a sense of transparency, it can be presented as a part of the skin. In addition, the above-mentioned "colored" also includes white.

[0159] When the liquid used in the liquid application step contains water, examples of the liquid include water, aqueous solutions, aqueous dispersions, and other aqueous liquids. In addition, examples include lotions, emulsions or cosmetic creams composed of emulsions such as O / W emulsions and W / O emulsions, and aqueous liquids thickened by thickeners.

[0160] When a liquid containing water or liquid oil is applied to the skin by means other than electrostatic spraying, various methods can be used. For example, a method in which the liquid can be applied to the skin by dripping, spraying, etc., after the liquid is applied to the skin, a step of applying the liquid is included as needed, so that it is fused to the skin or the coating, thereby forming a thin layer of the liquid. Regarding the step of applying the liquid, a method such as wiping by the user's own fingers or using tools such as applicators can be adopted. The liquid can be simply dripped or sprayed, but by having a step of applying, it can be fused to the skin or the coating, and the adhesion of the coating can be fully improved. As another method, the liquid can also be sprayed toward the skin using a sprayer to form a thin layer of the liquid. In this case, although there is no need to perform a special application operation, it is also okay to apply after spraying. In addition, when the liquid is applied again after the coating is formed, sufficient liquid is applied to the skin, and for the excess liquid, the excess liquid can be removed by contacting the sheet with the step of applying the liquid.

[0161] Regarding the use of the present invention, it can be used as makeup cosmetics such as base before makeup, foundation, concealer, blush, eye shadow, mascara, eyeliner, eyebrow makeup, protectant, lipstick, etc.; sunscreen cosmetics such as anti-ultraviolet cosmetics, moisturizing cosmetics, wrinkle improvement cosmetics, whitening cosmetics, sebum secretion regulating cosmetics, acne care cosmetics, anti-aging care cosmetics, etc. Skin care cosmetics, etc. Among them, base before makeup, foundation, concealer, protectant, sunscreen cosmetics are more preferred.

[0162] The present invention has been described above based on its preferred embodiment, however, the present invention is not limited to the above embodiment. For example, in the above embodiment, the person who wants to form a film on his / her skin holds the electrostatic spray device 10 so that an electric field is generated between the nozzle of the device 10 and the skin of the user. However, under the premise that an electric field can be generated between the two, the person who wants to form a film on his / her skin does not need to hold the electrostatic spray device 10.

[0163] Regarding the above-mentioned embodiment, the present invention further discloses the following method for producing a coating film and the like.

[0164] <1> A powder dispersion comprising the following components (A), (B) and (C):

[0165] (A) Powder;

[0166] (B) one or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups;

[0167] (C) One or more volatile substances selected from alcohols and ketones.

[0168] <2> The powder dispersion according to <1>, wherein the component (A) is one or more powders selected from hydrophilic powders and hydrophobic powders.

[0169] <3> A powder dispersion as described in <1> or <2>, wherein component (B) is one or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having a molecular weight of 500 or less and having two or more carboxyl groups; preferably one or more selected from hydroxycarboxylic acids having 4 to 12 carbon atoms and having 2 to 4 or more carboxyl groups, and aromatic carboxylic acids having 8 to 14 carbon atoms and having 2 to 4 carboxyl groups.

[0170] <4> The powder dispersion according to any one of <1> to <3>, wherein 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.

[0171] <5> The powder dispersion according to any one of <1> to <4>, wherein the content of component (A) is preferably 1 mass % to 60 mass %, more preferably 3 mass % to 55 mass %, further preferably 5 mass % to 50 mass %.

[0172] <6> The powder dispersion according to any one of <1> to <5>, wherein the content of component (B) is preferably 0.01% by mass to 10% by mass, more preferably 0.05% by mass to 7% by mass, and even more preferably 0.1% by mass to 3% by mass.

[0173] <7> The powder dispersion according to any one of <1> to <6>, wherein the component (C) contains ethanol.

[0174] <8> The powder dispersion according to any one of <1> to <7>, wherein the content of component (C) is preferably 35 mass % to 95 mass %, more preferably 40 mass % to 93 mass %, further preferably 45 mass % to 92 mass %.

[0175] <9> The powder dispersion according to any one of <1> to <8>, further comprising a component (D) which is a polymer having at least a monomer unit having an SP value of 8.6 or more and not containing a polyglycerol structure.

[0176] <10> A powder dispersion as described in <9>, wherein component (D) is one or more copolymers selected from acrylic copolymers, methacrylic copolymers, silicone copolymers and ethylene copolymers (excluding copolymers having a polyglycerol structure), and the copolymer has at least a monomer unit having an SP value of 8.6 or more.

[0177] <11> A powder dispersion as described in <9>, wherein component (D) is one or more copolymers selected from acrylic copolymers, methacrylic copolymers, silicone copolymers and vinyl copolymers, and these copolymers have monomer units containing a structure selected from acrylamide, methacrylamide, and N-acylalkyleneimine structure, betaine structure, polyethylene structure and polypropylene structure.

[0178] <12> The powder dispersion according to any one of <9> to <11>, wherein the content of component (D) is preferably 0.1% by mass to 10% by mass, more preferably 0.2% by mass to 8% by mass, and even more preferably 0.5% by mass to 5% by mass.

[0179] <13> A powder dispersion as described in any one of <9> to <12>, wherein the mass ratio (A / D) of component (A) to component (D) is preferably 5 or more and 200 or less, more preferably 6 or more and 100 or less, further preferably 7 or more and 50 or less, and further more preferably 8 or more and 40 or less.

[0180] <14> The powder dispersion according to any one of <1> to <13>, further comprising: a component (E) a polymer having fiber-forming ability.

[0181] <15> A powder dispersion as described in <14>, wherein the content of component (E) is preferably from 1 mass % to 45 mass %, more preferably from 4 mass % to 35 mass %, further preferably from 5 mass % to 30 mass %, further more preferably from 6 mass % to 20 mass %.

[0182] <16> A powder dispersion as described in <14> or <15>, wherein component (E) is at least one selected from partially saponified polyvinyl alcohol, low-saponified polyvinyl alcohol, completely saponified polyvinyl alcohol, polyvinyl butyral resin, polyurethane resin, polyacrylic acid resin other than component (D), polymethacrylic acid resin other than component (D), polyvinyl acetal diethylamino acetate, and polylactic acid.

[0183] <17> A powder dispersion as described in any one of <14> to <16>, wherein the mass ratio of component (E) to component (B) ((E) / (B)) is preferably 1 to 150, more preferably 2 to 100, further preferably 3 to 80, and further more preferably 4 to 60.

[0184] <18> The powder dispersion according to any one of <1> to <17>, which is a powder dispersion for skin use.

[0185] <19> A film-forming composition for forming a film composed of a fiber-containing deposit on the skin by electrostatically spraying a powder dispersion containing the following components (A), (B), (C) and (E),

[0186] (A) Powder;

[0187] (B) one or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups;

[0188] (C) one or more volatile substances selected from alcohols and ketones; and

[0189] (E) A polymer having fiber-forming ability.

[0190] <20> The film-forming composition according to <19>, wherein the content of the component (A) is preferably 0.01% by mass to 20% by mass, more preferably 0.1% by mass to 10% by mass, and even more preferably 0.5% by mass to 5% by mass.

[0191] <21> The film-forming composition as described in <19> or <20>, wherein the content of component (B) is preferably 0.001 mass % to 1 mass %, more preferably 0.002 mass % to 0.5 mass %, further preferably 0.005 mass % to 0.3 mass %.

[0192] <22> A film-forming composition as described in any one of <19> to <21>, wherein the content of component (C) is preferably 45 mass % to 95 mass %, more preferably 50 mass % to 92 mass %, further preferably 55 mass % to 90 mass %.

[0193] <23> A film-forming composition as described in any one of <19> to <22>, wherein the content of component (E) is preferably from 3 mass % to 45 mass %, more preferably from 4 mass % to 35 mass %, further preferably from 5 mass % to 30 mass %, further more preferably from 6 mass % to 20 mass %.

[0194] <24> The film-forming composition according to any one of <19> to <23>, further comprising: a component (D) a polymer having at least a monomer unit having an SP value of 8.6 or more and not containing a polyglycerol structure.

[0195] <25> A film-forming composition as described in any one of <19> to <24>, wherein the mass ratio of component (B) to component (D) ((B) / (D)) is preferably from 0.02 to 8, more preferably from 0.04 to 3, and even more preferably from 0.07 to 1.3.

[0196] <26> A film-forming composition as described in any one of <19> to <25>, wherein the mass ratio of component (A) to component (D) ((A) / (D)) is preferably 3 or more and 100 or less, more preferably 6 or more and 60 or less, and further preferably 8 or more and 40 or less.

[0197] <27> A method for producing a coating, comprising forming a coating composed of a deposit containing fibers on a surface of an object to be coated using a powder dispersion containing the following components (A), (B), (C) and (E),

[0198] (A) Powder;

[0199] (B) one or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups;

[0200] (C) one or more volatile substances selected from alcohols and ketones; and

[0201] (E) A polymer having fiber-forming ability.

[0202] <28> The method for producing a coating according to <27>, wherein the powder dispersion further contains a component (D) which is a polymer having at least a monomer unit having an SP value of 8.6 or more and not containing a polyglycerol structure.

[0203] <29> A fiber sheet comprising the following components (A), (B) and (E2):

[0204] (A) Powder;

[0205] (B) one or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups;

[0206] (E2) Polymer constituting the fiber.

[0207] <30> The fiber sheet according to <29>, wherein the thickness of the fibers constituting the fiber sheet is 10 nm or more and 3000 nm or less in terms of an equivalent circle diameter.

[0208] <31> The fiber sheet according to <30>, further comprising: a component (D) which is a polymer having at least a monomer unit having an SP value of 8.6 or more and not containing a polyglycerol structure.

[0209] [Example]

[0210] The present invention is further described in detail by enumerating the following examples, but the present invention is not limited to these examples. Unless otherwise stated, "%" means "mass %".

[0211] (Production Example) (Poly (N-propionylethyleneimine) modified silicone

[0212] 7.57 g (0.049 mole) of diethyl sulfate and 263.3 g (2.66 mole) of 2-ethyl-2-oxazoline were dissolved in 550 g of dehydrated ethyl acetate, and heated under reflux for 8 hours under nitrogen atmosphere to synthesize terminal reactive poly (N-propionylethyleneimine). 250 g (0.065 mol in terms of amino group) of side chain primary aminopropyl modified polydimethylsiloxane (weight average molecular weight 60000, amine equivalent 3870) was added at once in a 50% ethyl acetate solution, and heated under reflux for 12 hours. The number average molecular weight measured by GPC was 5400.

[0213] The reaction mixture was concentrated under reduced pressure to obtain a pale yellow rubbery solid N-propionylethyleneimine-dimethylsiloxane copolymer (505 g, yield 97%). The mass of the organopolysiloxane segment in the final product was 0.51, and the weight average molecular weight of the final product was 88,400.

[0214] [Test Example 1]

[0215] [Examples 1 to 15 and Comparative Examples 1 to 4]

[0216] The powder dispersions described in Tables 1 to 5 were produced.

[0217] [evaluate]

[0218] (1) Evaluation of precipitation state after storage

[0219] The powder dispersions described in Tables 1 to 5 were evaluated by observation of the precipitation state after being left to stand at 60° C. for 3 days after production.

[0220] A: A fluffy precipitate is formed. The supernatant is transparent.

[0221] B: A fluffy precipitate is formed. The supernatant is turbid.

[0222] C: A thin sedimentation layer is formed on the bottom surface.

[0223] (2) Evaluation of redispersibility after storage

[0224] The powder dispersions described in Tables 1 to 5 were allowed to stand at 60° C. for 3 days after production, shaken for 30 seconds (with a stirring ball), and the residual sediment (solid matter) on the bottom after shaking was observed and evaluated.

[0225] A: No precipitation. The solution is uniform.

[0226] B: Almost no precipitation. The solution is roughly uniform.

[0227] C: The precipitate does not easily disintegrate and remains slightly on the wall or bottom.

[0228] D: A large amount of sediment remains on the wall or bottom.

[0229] [Test Example 2]

[0230] [Examples 16 to 36 and Comparative Examples 5 to 8]

[0231] The film-forming compositions described in Tables 6 to 11 were produced.

[0232] [evaluate]

[0233] (1) Height of the precipitated powder phase after storage at 60°C for 3 days

[0234] The film-forming compositions described in Tables 6 to 11 were stored at 60° C. for 3 days after production, and the ratio of the powder phase to the liquid level was calculated.

[0235] Specifically, 9 ml of the film-forming composition was filled into a PP container No. 3 (container capacity: 9 ml) manufactured by MARUEMU CO., LTD., so that the liquid level height after filling was 45 mm.

[0236] The powder phase with poor redispersibility settles over time and aggregates and settles on the bottom of the container as in the comparative example, and the powder phase in appearance is 0%. However, the powder phase with easy dispersibility can be confirmed to have a flocculated powder phase as in the examples.

[0237] (2) Evaluation of redispersibility after storage

[0238] The film-forming compositions described in Tables 6 to 11 were allowed to stand at 60° C. for 3 days after production, shaken for 30 seconds (with a stirring ball), and the residual sediment (solid matter) on the bottom after shaking was observed and evaluated.

[0239] A: No precipitation. The solution is uniform.

[0240] B: Almost no precipitation. The solution is roughly uniform.

[0241] C: The precipitate does not easily disintegrate and remains slightly on the wall or bottom.

[0242] D: A large amount of sediment remains on the wall or bottom.

[0243] (3) The film-forming composition was electrostatically sprayed onto the substrate, and the hiding power (color development) of the obtained film was evaluated.

[0244] A: The color of the substrate is concealed and fully developed.

[0245] B: The color of the substrate is slightly concealed and there is color development.

[0246] C: The color of the substrate is not too hidden and the color is not too vivid.

[0247] D: The substrate color is hardly concealed and almost no color is developed.

[0248] (4) The film-forming composition was allowed to stand at 60° C. for 1 week, and then electrostatically sprayed onto the substrate to form a coating film. The color change between the coating film and the coating film immediately after the production was evaluated by observation.

[0249] A: There is almost no change compared to the coating film immediately after production.

[0250] B: There is a slight change compared to the coating film immediately after production, but there is no problem.

[0251] C: There is a slight color change compared to the coating film immediately after production, and the difference in the setting effect is obvious.

[0252] D: There is a significant color change compared to the coating immediately after production, and the difference in the setting effect is quite obvious.

[0253] Electrostatic spraying steps

[0254] Use with Figure 1 The structure shown and having Figure 2 The electrostatic spraying device 10 having the appearance shown was used to perform electrostatic spraying on the resin substrate for 20 seconds. The conditions of the electrostatic spraying were as follows.

[0255] Applied voltage: 10kV

[0256] Distance between conductive nozzle and substrate: 100mm

[0257] ·Discharge rate of film-forming composition: 5 mL / h

[0258] Environment: 25℃, 30%RH

[0259] The electrostatic spraying formed a porous film composed of deposited fibers on the surface of the resin substrate. The film was a circle with a diameter of about 4 cm and a mass of about 5.5 mg. The fiber thickness measured by the above method was 1 μm.

[0260] [Table 1]

[0261]

[0262] [Table 2]

[0263]

[0264] [Table 3]

[0265]

[0266] [Table 4]

[0267]

[0268] [Table 5]

[0269]

[0270] [Table 6]

[0271]

[0272] [Table 7]

[0273]

[0274] [Table 8]

[0275]

[0276] [Table 9]

[0277]

[0278] [Table 10]

[0279]

[0280] [Table 11]

[0281]

[0282] [Test Example 3]

[0283] The film-forming composition of Formulation Example 1 was electrostatically sprayed onto a substrate to produce a fiber sheet, and the hiding power (color development) was evaluated, which was found to be good.

[0284] [Formulation Example 1]

[0285]

[0286] [Explanation of symbols]

[0287] 10: Electrostatic spray device

[0288] 11: Low voltage power supply

[0289] 12: High voltage power supply

[0290] 13: Auxiliary circuit

[0291] 14: Micro gear pump

[0292] 15: Container

[0293] 16: Nozzle

[0294] 17: Pipeline

[0295] 18: Flexible pipe

[0296] 19: Current limiting resistor

[0297] 20: Frame.

Claims

1. A film-forming composition for forming a film composed of a fiber-containing deposit on the skin by electrostatically spraying a powder dispersion 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; and (E) A polymer having fiber-forming ability.

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

3. The film-forming composition according to claim 1 or 2, wherein The content of the component (B) is 0.001% by mass or more and 1% by mass or less, and the content of the component (C) is 45% by mass or more and 95% by mass or less.

4. The film-forming composition according to any one of claims 1 to 3, wherein The present invention further contains: as component (D), a polymer having at least an SP value of 8.6 or more and containing no polyglycerol structure monomer unit.

5. The film-forming composition according to claim 4, wherein Component (D) is a copolymer of one or more selected from acrylic copolymers, methacrylic copolymers, silicone copolymers and vinyl copolymers, and the copolymer has a monomer unit containing a structure selected from acrylamide, methacrylamide, N-acylalkyleneimine structure, betaine structure, polyethylene structure and polypropylene structure.

6. The film-forming composition according to claim 4 or 5, wherein The content of the component (D) is 0.1% by mass or more and 10% by mass or less.

7. A method for manufacturing a coating, wherein: A film composed of a deposit containing fibers is formed on the surface of an object to be film-formed using the film-forming composition according to any one of claims 1 to 6.

8. A fiber sheet, wherein: Contains the following ingredients (A), (B) and (E2): (A) Powder; (B) one or more selected from hydroxycarboxylic acids and aromatic carboxylic acids having two or more carboxyl groups; and (E2) Polymer constituting the fiber.

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

Images