Composition for forming a coating film

Abstract

The present invention provides a film formation composition for forming a film formed of fibers directly on the skin by electrostatic spraying, the formed film being excellent in sebum resistance. The present invention relates to a film formation composition containing components (a), (b), (c), and (d) below. (a) a polymer having a film formation ability; (b) one or more volatile substances selected from the group consisting of alcohols and ketones; (c) a plasticizer; (d) a non-volatile oil other than the component (c) having a viscosity of 50 mP·s or more and 3000 mP·s or less at 35°C in an amount of 3% by mass or more and 15% by mass or less.

Description

Technical Field

[0001] This invention relates to a composition for forming a coating on the skin. Background Technology

[0002] Various methods for forming a film by electrostatic spraying are known. For example, Patent Document 1 describes a method for treating skin that includes the step of electrostatically spraying a composition onto the skin. The composition used in this method contains a liquid insulating substance, a conductive substance, a particulate powder substance, and a thickener. Typically, a cosmetic or skin care composition containing pigments is used as this composition. Specifically, a cosmetic foundation is used as the composition. That is, the invention described in Patent Document 1 is mainly conceived as applying makeup to the skin by electrostatically spraying a cosmetic foundation for cosmetic purposes.

[0003] Patent Document 2 describes a disposable box for an electrostatic spray device used in cosmetics. This electrostatic spray device is a handheld, built-in device. Like Patent Document 1, it is used to spray cosmetic foundation.

[0004] In addition, Patent Document 3 describes a method for creating a coating on the skin by directly electrostatically spraying a composition containing volatile substances, a polymer with film-forming ability, and an oil that is solid at 20°C onto the skin.

[0005] In addition, Patent Document 4 describes a composition containing volatile substances, a polymer with film-forming ability, a plasticizer and a touch modifier, and is used to form a fiber-based film directly on the skin by electrostatic spraying.

[0006] Patent Document 1: Japanese Patent Application Publication No. 2006-104211

[0007] Patent Document 2: Japanese Patent Publication No. 2003-507165

[0008] Patent Document 3: Japanese Patent Application Publication No. 2018-177797

[0009] Patent Document 4: Japanese Patent Application Publication No. 2020-63226 Summary of the Invention

[0010] This invention relates to a coating-forming composition containing the following components (a), (b), (c) and (d).

[0011] (a) Polymers with film-forming capabilities;

[0012] (b) Selected from one or more volatile substances of alcohols and ketones;

[0013] (c) Plasticizers;

[0014] (d) Non-volatile oils with a viscosity of 50 mP·s or more and 3000 mP·s or less at 35°C, other than component (c), are 3% by mass or less and 15% by mass. Attached Figure Description

[0015] Figure 1 This is a schematic diagram showing the configuration of the electrostatic spraying device preferably used in this invention.

[0016] Figure 2 This is a schematic diagram showing how electrostatic spraying is performed using an electrostatic spraying device. Detailed Implementation

[0017] When forming a film on the skin by electrostatic spraying according to the methods described in Patent Documents 1 and 2, sometimes the adhesion between the skin and the film formed by electrostatic spraying is insufficient, and the film is damaged or peeled off due to external forces such as friction. On the other hand, it has been found that although the film formed on the skin by the compositions of Patent Documents 3 and 4 has excellent adhesion and abrasion resistance, the film formed on the skin becomes brittle and dissolves over time.

[0018] Therefore, the present invention relates to a composition that not only forms a coating on the skin with excellent adhesion and abrasion resistance, but also does not become brittle after a long period of time, thus forming a coating that can protect the skin.

[0019] The inventors conducted various studies on the reasons why films formed on the skin become brittle over time. The results showed that the more sebum secreted by the skin after film formation, the faster the film becomes brittle. Furthermore, further research revealed that, in addition to polymers, volatile components, and plasticizers with film-forming ability, a certain amount of non-volatile oily components with a viscosity within a certain range at 35°C was also included. This resulted in a composition that strongly resists sebum secreted by the skin surface with a film and can form a non-brittle film, thus completing the present invention.

[0020] When the composition of the present invention is used to form a fiber-based coating on the skin, the resulting coating not only has excellent skin compatibility, adhesion and abrasion resistance, but also excellent sebum resistance. As a result, the coating on the skin will not become brittle or dissolve even after a long period of time, thus providing long-term protection for the skin.

[0021] The coating-forming composition of the present invention contains the above-described components (a), (b), (c), and (d). Furthermore, in the present invention, a coating formed from fibers refers to a coating containing fibers formed from component (a), and a liquid may also be present outside the fibers, for example, around the fibers.

[0022] The polymer with film-forming ability in component (a) is typically a substance that can dissolve in the volatile substance of component (b). Here, dissolution means that when components (a) and (b) are mixed, component (a) is dispersed in component (b) at 20°C, and the dispersion is uniform in appearance, preferably transparent or translucent in appearance.

[0023] As a polymer capable of forming a film, a suitable polymer can be used depending on the properties of the volatile substances in component (b). Specifically, polymers capable of forming a film are broadly classified into water-soluble polymers and water-insoluble polymers. In this specification, a "water-soluble polymer" refers to a polymer having the following properties: when 1 g of polymer is weighed and immersed in 10 g of ion-exchanged water at 1 atmosphere and 23°C, at least 0.5 g of the immersed polymer dissolves in the water after 24 hours. On the other hand, in this specification, a "water-insoluble polymer" refers to a polymer having the following properties: when 1 g of polymer is weighed and immersed in 10 g of ion-exchanged water at 1 atmosphere and 23°C, at least less than 0.5 g of the immersed polymer dissolves in the water after 24 hours.

[0024] Examples of water-soluble polymers with film-forming capabilities include: amylopectin, hyaluronic acid, chondroitin sulfate, poly-γ-glutamic acid, modified corn starch, β-glucan, glucose oligosaccharides, heparin, keratin sulfate, cellulose, pectin, xylan, lignin, glucomannan, galacturonic acid, psyllium husk gum, tamarind gum, gum arabic, tragacanth gum, soybean water-soluble polysaccharides, alginic acid, carrageenan, laminarin, agar (agarose), fucoidan, methylcellulose, hydroxypropylcellulose, hydroxypropyl methylcellulose, and other natural polymers; partially saponified polyvinyl alcohol (when not used with a crosslinking agent); low-saponified polyvinyl alcohol; polyvinylpyrrolidone (PVP); polyethylene oxide; sodium polyacrylate, and other synthetic polymers. One of these water-soluble polymers can be used, or two or more can be used in combination. Among these water-soluble polymers, from the viewpoint of easy film fabrication, synthetic polymers such as amylopectin, partially saponified polyvinyl alcohol, low-saponified polyvinyl alcohol, polyvinylpyrrolidone, and polyethylene oxide are preferred. When polyethylene oxide is used as the water-soluble polymer, its number-average molecular weight is preferably 50,000 to 3,000,000, more preferably 100,000 to 2,500,000.

[0025] On the other hand, water-insoluble polymers with film-forming capabilities include, for example, fully saponified polyvinyl alcohol (PVA) that can be insoluble after film formation, partially saponified PVA that can be crosslinked after film formation by use with a crosslinking agent, oxazoline-modified silicones such as poly(N-propionylethyleneimine)-grafted-dimethylsiloxane / γ-aminopropylmethylsiloxane copolymer, polyvinyl acetal diethylaminoacetate, corn protein (the main component of corn protein), polyester, polylactic acid (PLA), polyacrylonitrile resin, acrylic resins such as polymethacrylic acid resin, polystyrene resin, polyvinyl butyral resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polyurethane resin, polyamide resin, polyimide resin, and polyamide-imide resin. One of these water-insoluble polymers can be used, or two or more can be used in combination.

[0026] Among these water-insoluble polymers, fully saponified polyvinyl alcohol that can be insoluble after coating formation, partially saponified polyvinyl alcohol that can be crosslinked after coating formation by use with a crosslinking agent, polyvinyl butyral resin, polyurethane resin, oxazoline-modified organosilicon such as poly(N-propionylethyleneimine) grafted-dimethylsiloxane / γ-aminopropylmethylsiloxane copolymer, polyvinyl acetal diethylaminoacetate, corn protein, etc. are preferred.

[0027] As component (a), a water-insoluble polymer with film-forming ability is preferred, and more preferably selected from one or more of partially saponified polyvinyl alcohol, low-saponified polyvinyl alcohol, fully saponified polyvinyl alcohol, polyvinyl butyral resin, polyurethane resin, polymethyl methacrylate resin, oxazoline-modified silicone, polyvinyl acetal diethylaminoacetate and polylactic acid.

[0028] The content of component (a) in the coating-forming composition of the present invention is preferably 1.0% by mass or more, more preferably 2.0% by mass or more, further preferably 4.0% by mass or more, even more preferably 6.0% by mass or more, and even more preferably 8.0% by mass or more. Furthermore, it is preferably 35% by mass or less, more preferably 30% by mass or less, even more preferably 25% by mass or less, and even more preferably 20% by mass or less. The content of component (a) in the coating-forming composition is preferably 1.0% by mass or more and 30% by mass or less, more preferably 2.0% by mass or more and 25% by mass or less, further preferably 4.0% by mass or more and 20% by mass or less, and even more preferably 6.0% by mass or more and 20% by mass or less. Furthermore, the preferred concentration is 2.0% by mass or more and 35% by mass or less, more preferably 4.0% by mass or more and 30% by mass or less, even more preferably 6.0% by mass or more and 30% by mass or less, even more preferably 6.0% by mass or more and 25% by mass or less, even more preferably 8.0% by mass or more and 25% by mass or less, and even more preferably 8.0% by mass or more and 20% by mass or less. By containing component (a) in this proportion in the coating forming composition, the target coating can be formed effectively, and the coating formed from fibers can be formed stably.

[0029] Component (b) is a volatile substance that is volatile in a liquid state. The purpose of incorporating component (b) into the coating-forming composition is that, after the coating-forming composition is sufficiently charged within an electric field, it is sprayed onto the skin from the nozzle tip. As component (b) evaporates, the charge density of the coating-forming composition becomes excessive, resulting in micronization due to Coulomb repulsion, and further evaporation of component (b) ultimately forms a dry coating. For this purpose, the vapor pressure of the volatile substance at 20°C is preferably 0.01 kPa to 106.66 kPa and below, more preferably 0.13 kPa to 66.66 kPa and below, even more preferably 0.67 kPa to 40.00 kPa and below, even more preferably 1.33 kPa to 40.00 kPa and below, and even more preferably 2.40 kPa to 40.00 kPa and below.

[0030] In component (b) volatile substances, alcohols, for example, mono-chain aliphatic alcohols, mono-cyclic aliphatic alcohols, and mono-aromatic alcohols are suitable. Mono-chain aliphatic alcohols can be listed as straight-chain or branched alcohols with 1 to 6 carbon atoms; mono-cyclic aliphatic alcohols can be listed as cyclic aliphatic alcohols with 4 to 6 carbon atoms; and mono-aromatic alcohols can be listed as benzyl alcohol, phenylethanol, etc. Specific examples include methanol, ethanol, isopropanol, n-propanol, n-butanol, 2-butanol, isobutanol, 2-methyl-2-propanol, n-pentanol, 2-pentanol, 3-pentanol, 2-methyl-1-butanol, 2-methyl-2-butanol, 3-methyl-1-butanol, 3-methyl-2-butanol, neopentanol, n-hexanol, 2-hexanol, 3-hexanol, 2-methyl-1-pentanol, 3-methyl-1-pentanol, 4-methyl-1-... -Pentanol, 2-methyl-2-pentanol, 3-methyl-2-pentanol, 4-methyl-2-pentanol, 2-methyl-3-pentanol, 3-methyl-3-pentanol, 2,2-dimethyl-1-butanol, 2,3-dimethyl-1-butanol, 3,3-dimethyl-1-butanol, 2,3-dimethyl-2-butanol, 3,3-dimethyl-2-butanol, 2-ethyl-1-butanol, cyclobutanol, cyclopentanol, cyclohexanol, benzyl alcohol, phenethyl alcohol, etc. These alcohols can be used with one selected from these, or in combination of two or more.

[0031] Among the volatile substances in component (b), ketones can be listed as having two alkyl groups having one to four carbon atoms, such as acetone, methyl ethyl ketone, and methyl isobutyl ketone. One of these ketones can be used, or two or more can be used in combination.

[0032] Component (b) volatile substances may be selected from one of the above alcohols and ketones, or a combination of two or more.

[0033] The volatile substance in component (b) is more preferably selected from one or more of ethanol, isopropanol and n-butanol, more preferably selected from one or more of ethanol and isopropanol, and even more preferably ethanol.

[0034] The content of component (b) in the coating-forming composition is preferably 45% by mass or more, more preferably 50% by mass or more, further preferably 55% by mass or more, and even more preferably 60% by mass or more. Furthermore, it is preferably 98.8% by mass or less, more preferably 98% by mass or less, further preferably 97% by mass or less, even more preferably 96% by mass or less, even more preferably 94% by mass or less, even more preferably 91% by mass or less, and even more preferably 88.5% by mass or less. The content of component (b) in the coating-forming composition is preferably 50% by mass or more and 98.8% by mass or less, more preferably 50% by mass or more and 98% by mass or less, further preferably 55% by mass or more and 96% by mass or less, and even more preferably 60% by mass or more and 94% by mass or less. Additionally, it is preferably 45% by mass or more and 97% by mass or less, more preferably 50% by mass or more and 94% by mass or less, even more preferably 50% by mass or more and 91% by mass or less, and even more preferably 50% by mass or more and 88.5% by mass or less. By including component (b) in the coating forming composition at this proportion, the target coating can be formed effectively, and the fiber-formed coating can be formed stably. Furthermore, by including component (b) in the coating forming composition at this proportion, component (b) can be effectively and sufficiently volatilized from the coating forming composition during electrostatic spraying.

[0035] From the viewpoints of effectively forming the target coating, stably forming the fiber-formed coating, and effectively and sufficiently volatilizing component (b) from the coating-forming composition during electrostatic spraying, the mass ratio ((a) / (b)) of component (a) to component (b) in the coating-forming composition is preferably 0.010 or more, more preferably 0.060 or more, even more preferably 0.080 or more, even more preferably 0.10 or more, even more preferably 0.11 or more, and even more preferably 0.12 or more. Furthermore, it is preferably 0.60 or less, more preferably 0.45 or less, even more preferably 0.35 or less, even more preferably 0.33 or less, even more preferably 0.30 or less, even more preferably 0.25 or less, even more preferably 0.20 or less, and even more preferably 0.18 or less. The (a) / (b) is preferably 0.010 to 0.60, more preferably 0.060 to 0.33, even more preferably 0.10 to 0.25, even more preferably 0.11 to 0.20, and even more preferably 0.12 to 0.18. Furthermore, it is preferably 0.060 to 0.45, more preferably 0.080 to 0.35, even more preferably 0.10 to 0.33, even more preferably 0.11 to 0.30, and even more preferably 0.12 to 0.25.

[0036] As for ingredients (c) and (d), there are no particular limitations as long as they are ingredients that can be used in the field of cosmetics. For example, one of the following can be used: polyols, polyoxyalkylene glycols, polyoxyalkylene ethers, ester oils, silicone oils, hydrocarbon oils, liquid oils, solid oils, higher alcohols, nonionic surfactants, etc., or two or more can be used in combination.

[0037] The plasticizer (c) is a component that imparts softness to the coating formed from fibers by electrostatic spraying, thereby improving the adhesion and abrasion resistance of the coating to the skin, enhancing the coating's responsiveness to skin movements, and improving the skin integration of the coating.

[0038] In addition, as component (c) plasticizer, it is selected from compounds that are evaluated according to the following evaluation criteria as having plasticizing properties for polymers that are insoluble in water of component (a) and have the ability to form a film.

[0039] (Evaluation Steps)

[0040] (1) Add 8.8g of the oil and other substances to be evaluated in MIGHTY VIAL No.4 (manufactured by MARUEMU Corporation).

[0041] (2) Add 1.2g of a specific component (a) of a polymer with film-forming ability to the vial from (1), stir with a spatula to fully disperse the polymer in the oil, and cap the MIGHTY VIAL. Alternatively, if the polymer is in powder form, it can be used directly for evaluation. If the polymer is in solution form, after removing the solvent and allowing the polymer to precipitate, cut it into small pieces smaller than 3mm × 3mm × 3mm for evaluation. If the polymer has already precipitated into small pieces smaller than 3mm × 3mm × 3mm, it can be used directly for evaluation. If the polymer is in film form, cut it into small pieces smaller than 3mm × 3mm × 3mm for evaluation.

[0042] (3) Using a stirring rotor (MVR-3R (manufactured by AS ONE Corporation)), rotate the vial of (2) at a speed of 100 r / min for 1 revolution. (Room temperature: 25℃)

[0043] (4) Let the small bottle from (3) stand at 25°C for 2 hours and visually observe its condition.

[0044] (Evaluation Criteria)

[0045] • Exhibits plasticizing properties: The polymer is completely dissolved in the oil or similar agent (a transparent single-phase solution), or the polymer and oil or similar agent are mixed to form a gel. In cases where the oil or similar agent partially separates (polymer + oil phase versus oil phase), the polymer + oil phase remains a gel. (The shape of the polymer before evaluation is not maintained.)

[0046] • No plasticizing properties: The polymer settles after standing, and disperses again if agitated. If left to stand further, the polymer settles again. No dissolution or gelation of the polymer occurred. (The polymer maintained its shape as it was before evaluation.)

[0047] As a plasticizer for component (c), it is preferably a compound that readily interacts with functional groups such as hydroxyl, ester, and acetal in the structure of polymers capable of film formation. Specifically, examples include polyols, polyoxyalkylene glycols (polyethers), polyoxyalkylene ethers, specific ester oils, specific silicone oils, and nonionic surfactants. From the viewpoint of improving abrasion resistance and the feel of the coating, compounds containing polyols, polyoxyalkylene glycols, monoglycerides, diglycerides, malate esters, N-acyl amino acid esters, ethylhexyl methoxycinnamate, and alkyl benzoates are preferred. One of these compounds may be used, or a combination of two or more may be used.

[0048] As polyols, examples include polyols with 2 to 6 members, such as ethylene glycol, propylene glycol, 1,3-propanediol, glycerol, and 1,3-butanediol.

[0049] Examples of polyoxyalkylene glycols include diethylene glycol, triethylene glycol, polyethylene glycol, dipropylene glycol, tripropylene glycol, polypropylene glycol, dibutylene glycol, tributylene glycol, polybutylene glycol, diglycerol, triglycerol, polyglycerol, polyoxyalkylene glycols (containing one or more oxidized olefins such as ethylene oxide, propylene oxide, and butene oxide as alkylene oxide structural units) and mixtures thereof, polyoxyethylene glycerol, polyoxypropylene glycerol ether, polyoxybutene glycerol ether, polyoxyethylene glycerol ether (containing one or more oxidized olefins such as ethylene oxide, propylene oxide, and butene oxide as alkylene oxide structural units) and mixtures thereof.

[0050] Examples of polyoxyethylene alkyl ethers include, for example, polyoxyethylene lauryl ether, polyoxyethylene oil-based ether, polyoxypropylene lauryl ether, polyoxypropylene oil-based ether, polyoxybutylene lauryl ether, polyoxybutylene oil-based ether, polyoxyethylene alkyl ether (an alkyl ether containing one or more olefin oxides such as ethylene oxide, propylene oxide, and butene oxide as structural units of olefin oxide, and containing a straight-chain or branched alkyl group having about 1 to 20 carbon atoms), polyoxyethylene methyl glucoside, polyoxypropylene methyl glucoside, polyoxyethylene methyl glucoside (containing one or more olefin oxides such as ethylene oxide, propylene oxide, and butene oxide as structural units of olefin oxide), and mixtures thereof.

[0051] Specific ester oils include, for example, monostearate, monoisostearate, monooleate, monopalmitate, and other monofatty acid glycerides; distearate, diisostearate, dioleate, dipalmitate, and other difatty acid glycerides; cetyl lactate, myristyl lactate, and other lactate esters; triethyl citrate, diisostearate, malate, and other malate esters; amino acid esters such as amino acid ester-2; acyl amino acid esters such as lauroyl sarcosine isopropyl ester; ultraviolet absorbers such as ethylhexyl methoxycinnamate; and alkyl benzoates, etc.

[0052] Specific silicone oils that can be listed include amino-terminated polydimethylsiloxane, aminoethylaminopropyl polydimethylsiloxane, aminopropyl polydimethylsiloxane, oxazoline modified organosilicon, PEG-11 methyl ether polydimethylsiloxane, PEG / PPG-20 / 22 butyl ether polydimethylsiloxane, polyglycerol-3-disiloxane polydimethylsiloxane, polyglycerol-3-disiloxane ethyl polydimethylsiloxane, lauryl polyglycerol-3-disiloxane ethyl polydimethylsiloxane, etc.

[0053] As nonionic surfactants, examples include polyethylene glycol monolaurate, polyethylene glycol monostearate, and other monofatty acid polyethylene glycol esters; polyethylene glycol monolaurate, polyethylene glycol monostearate, and other monofatty acid polyethylene glycol esters; polyethylene glycol monolaurate, polyethylene glycol monostearate, and other monofatty acid polyethylene glycol esters; polyethylene glycol monolaurate, polyethylene glycol monostearate, and other monofatty acid polyethylene glycol esters; polyoxyalkylene glycol monofatty acid esters (containing one or more oxidized olefins such as ethylene oxide, propylene oxide, and butene oxide as oxyalkylene structural units) and mixtures thereof; and polyoxyalkylene glycol difatty acid esters (containing one or more oxidized olefins such as ethylene oxide, propylene oxide, and butene oxide as oxyalkylene structural units). The plasticizers include: (and the two fatty acids can be the same or different types of fatty acids) and mixtures thereof, such as polyoxyethylene sorbitan fatty acid esters, maltitol hydroxyaliphatic alkyl ethers, alkylated polysaccharides, alkyl glycosides, sucrose fatty acid esters, polyoxyethylene hydrogenated castor oil glycerol, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene-polyoxypropylene block copolymers, tetraethylene-tetraethyleneoxypropylene-ethylenediamine condensates, polyoxyethylene-beeswax-lanolin derivatives, alkanolamides, polyoxyethylene-propylene glycol fatty acid esters, polyoxyethylene-alkylamines, polyoxyethylene-fatty acid amides, alkylethoxydimethylamine oxides, trioleyl phosphate esters, and polyoxyethylene fatty acid glycerides. One of these plasticizers can be used, or two or more can be used in combination.

[0054] The content of component (c) in the coating-forming composition is preferably 0.10% by mass or more, more preferably 0.50% by mass or more, further preferably 1.0% by mass or more, and even more preferably 1.5% by mass or more. It is also preferably 30% by mass or less, more preferably 25% by mass or less, further preferably 20% by mass or less, and even more preferably 15% by mass or less. The content of component (c) in the coating-forming composition is preferably 0.10% by mass or more than 30% by mass, more preferably 0.50% by mass or more than 25% by mass, further preferably 1.0% by mass or more than 20% by mass, and even more preferably 1.0% by mass or more than 15% by mass. Furthermore, it is preferably 0.50% by mass or more than 30% by mass, more preferably 1.0% by mass or more than 25% by mass, further preferably 1.0% by mass or more than 20% by mass, and even more preferably 1.5% by mass or more than 15% by mass. When the content of component (c) is within this range, it can impart softness to the coating formed by fibers through electrostatic spraying, improve the coating's adhesion to the skin and its abrasion resistance, improve the coating's responsiveness to skin movements, and improve the coating's skin integration.

[0055] From the viewpoint of the softness, skin integration, adhesion, and abrasion resistance of the coating formed by electrostatic spraying from fibers, the mass ratio ((a) / (c)) of component (a) to component (c) in the coating-forming composition is preferably 0.033 or more, more preferably 0.10 or more, further preferably 0.20 or more, even more preferably 0.40 or more, even more preferably 0.80 or more, even more preferably 1.0 or more, and even more preferably 1.5 or more. Furthermore, it is preferably 300 or less, more preferably 60 or less, even more preferably 30 or less, even more preferably 20 or less, even more preferably 15 or less, even more preferably 10 or less, and even more preferably 8.0 or less. The (a) / (c) ratio is preferably 0.033 or more and 300 or less, more preferably 0.10 or more and 60 or less, even more preferably 0.20 or more and 30 or less, even more preferably 0.40 or more and 10 or less, and even more preferably 1.0 or more and 10 or less. Furthermore, it is preferred to have a value of 0.80 or more and 20 or less, more preferably 1.0 or more and 15 or less, even more preferably 1.0 or more and 10 or less, and even more preferably 1.5 or more and 8.0 or less.

[0056] Component (d) is a non-volatile oil with a viscosity of 50 mP·s to 3000 mP·s other than component (c). Here, a non-volatile oil is defined as an oil that is non-volatile at 20°C. On the other hand, in this invention, a non-volatile oil with a viscosity of 50 mP·s to 3000 mP·s at 35°C refers to a mixture containing one or more non-volatile oils whose overall viscosity at 35°C is 50 mP·s to 3000 mP·s. Therefore, the viscosity of the single non-volatile oil at 35°C does not necessarily have to be within this range; it is sufficient that the viscosity of the mixture of two or more non-volatile oils is within this range. For example, a non-volatile oil with a viscosity of less than 50 mP·s at 35°C can be mixed with a non-volatile oil with a viscosity of more than 3000 mP·s at 35°C. The viscosity of the mixture at 35°C only needs to be between 50 mP·s and 3000 mP·s. Alternatively, a thickener can be added to the non-volatile oil with a viscosity of less than 50 mP·s at 35°C to adjust the viscosity to between 50 mP·s and 3000 mP·s before use.

[0057] As the non-volatile oil used as component (d), one or more of the following can be used: ester oil, silicone oil, hydrocarbon oil, liquid oil, solid oil, higher alcohol, etc., other than component (c), or a combination of two or more. When one or more of these non-volatile oils are used, a combination with a viscosity of 50 mP·s or more and 3000 mP·s or less at 35°C is preferred. From the viewpoint of obtaining excellent sebum resistance of the coating, a viscosity of 100 mP·s or more at 35°C is preferred, more preferably 150 mP·s or more, further preferably 170 mP·s or more, even more preferably 200 mP·s or more, and preferably 2800 mP·s or less, more preferably 2500 mP·s or less, even more preferably 2000 mP·s or less, and even more preferably 1700 mP·s or less. Specifically, the preferred viscosity at 35°C is 100 mP·s or more and 2800 mP·s or less, more preferably 150 mP·s or more and 2500 mP·s or less, even more preferably 170 mP·s or more and 2000 mP·s or less, and even more preferably 200 mP·s or more and 1700 mP·s or less.

[0058] As ester oils, examples include caprylates such as cetyl octanoate, laurates such as hexyl laurate, myristates such as octyl dodecyl myristate, palmitates such as octyl palmitate, stearates such as isocetyl stearate, isostearates such as isostearate such as isopropyl isostearate, isopalmitates such as octyl isopalmitate, oleates such as isodecanyl oleate, adipate diesters such as diisopropyl adipate, sebacic acid diesters such as diethyl sebacic acid, malate diesters such as diisostearate, isononyl isononanoate, isononyl tridecyl isononanoate, ethylhexanoate such as cetyl ethylhexanoate, fatty acid esters such as neopentyl glycol diethylhexanoate, and pentaerythritol tetraethylhexanoate. Alcohol esters, triglycerides isostearate, glycerides diisostearate, triethylhexanoin, dimerized linoleic acid (phytosterol / behenyl) ester, dimerized linoleic acid (phytosterol / isostearyl / cetyl / stearyl / isostearyl / cetyl / stearyl / behenyl) ester, macadamia fatty acid phytosterol ester, pentaerythritol tetra(behenic acid / benzoic acid / ethylhexanoic acid) ester, tripropylene glycol dinepentanoate, diisopropyl sebacate, isodecanyl neopentanoate, hexyldecyl dimethyl octanoate, cetyl lactate, myristyl lactate, lanolin acetate, cholesterol 12-hydroxystearate Esters, Di(2-ethylhexanoic acid) ethylene glycol ester, Pentaerythritol fatty acid ester, N-alkyl diol monoisostearate, Neopentyl glycol didecanoate, Diisostearate malate, Di(2-heptylundecanoic acid) glyceryl ester, Trimethylolpropane tri(2-ethylhexanoic acid) ester, Trimethylolpropane triisostearate, Tricaprylic acid glyceryl ester, Triisopalmitoate glyceryl ester, Trimethylolpropane triisostearate, Cetyl 2-ethylhexanoate, Pentaerythritol tetra(2-ethylhexanoic acid) ester, Tri(2-ethylhexanoic acid) glyceryl ester, 2-ethylhexyl palmitate, Trimyristic acid glyceryl ester, Tri(2-heptylundecanoic acid) glyceryl ester, Castor oil fatty acid methyl ester Esters, acetylglucosyl esters, 2-heptylundecyl palmitate, diisobutyl adipate, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, di-2-hexyldecyl adipate, triethyl citrate, mono- and di- and tri-fatty acid glycerides, acyl amino acid diesters such as lauroyl glutamic acid di(phytosterol / octyldodecyl) ester, ultraviolet absorbers such as ethylhexyl methoxycinnamate, alkyl benzoates, etc.

[0059] From the viewpoint of obtaining a coating with excellent sebum resistance, it is more preferable to use one or more glycerides selected from pentaerythritol tetraethylhexanoate, glyceryl diisostearate, glyceryl triisooctanoate, pentaerythritol tetra(benzyl / benzoic acid / ethylhexanoate), dipentaerythritol fatty acid ester, di(2-heptylundecanoic acid) glyceride, glyceryl trioctanoate, glyceryl triisopalmitoate, glyceryl tri(2-ethylhexanoate), glyceryl trimyristicate, glyceryl tri(2-heptylundecanoic acid), acetylglycine, mono-fatty acid glycerides, di-fatty acid glycerides, tri-fatty acid glycerides, and other glycerides, as well as acyl amino acid diesters such as lauroylglutamate di(phytosterol / octyldodecyl) ester.

[0060] As hydrocarbon oils, examples include liquid paraffin, squalane, squalene, alkanes, isoalkanes, pure ceresin, isohexadecane, isododecane, ceresin, squalane, paraffin, petrolatum, microcrystalline wax, etc.

[0061] From the viewpoint of obtaining a coating with excellent sebum resistance, it is more preferable to use one or more of liquid paraffin, isododecane, paraffin, and petrolatum.

[0062] Examples of liquid oils include flaxseed oil, camellia oil, macadamia nut oil, corn oil, mink oil, olive oil, avocado oil, tea plum oil, castor oil, safflower oil, rapeseed oil, soybean oil, peanut oil, triglycerides, tricaprylic acid glycerides, triisopalmitoyl triglycerides, almond oil, cinnamon oil, jojoba oil, grapeseed oil, sunflower seed oil, almond oil, sesame oil, wheat germ oil, rice germ oil, rice bran oil, cottonseed oil, tea seed oil, evening primrose oil, egg yolk oil, ox foot oil, liver oil, and pentaerythritol tetracaprylic acid ester.

[0063] Examples of solid fats include cocoa butter, coconut oil, palm oil, palm kernel oil, tallow, mutton tallow, lard, horse fat, hydrogenated oil, hydrogenated castor oil, wood wax, and shea butter.

[0064] As higher alcohols, examples include saturated straight-chain monohydric alcohols and unsaturated monohydric alcohols. Examples of saturated straight-chain monohydric alcohols include dodecyl alcohol (lauryl alcohol), tridecyl alcohol, tetradecyl alcohol (myristyl alcohol), pentadecyl alcohol, hexadecyl alcohol (cetyl alcohol), heptadecanol, octadecyl alcohol (stearyl alcohol), nonadecanol, eicosyl alcohol (arachidyl alcohol), dodecyl alcohol, docosyl alcohol (behenyl alcohol), tridecyl alcohol, docosyl alcohol (carnaubapalyl alcohol), docosyl alcohol, and docosyl alcohol (wax alcohol). Examples of unsaturated monohydric alcohols include oleyl alcohol and transoleyl alcohol.

[0065] Examples of silicone oils include chain-like organosilicones such as dimethylpolysiloxane (polydimethylsiloxane), methylphenylpolysiloxane, diphenylpolysiloxane (diphenylpolydimethylsiloxane), diphenylsiloxyphenylpolytrimethylsiloxane, and methylhydropolysiloxane; cyclic organosilicones such as cyclopentasiloxane-methylpolytrimethylsiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecylcyclohexasiloxane; organosilicon resins that form a three-dimensional network structure; and organosilicon rubber.

[0066] From the viewpoint of obtaining a coating with excellent sebum resistance, the content of component (d) in the coating-forming composition is 3% by mass or more and 15% by mass or less. Further, it is preferably 3.5% by mass or more and 15% by mass or less, more preferably 4% by mass or more and 15% by mass or less, and even more preferably 5% by mass or more and 15% by mass or less.

[0067] From the viewpoint of improving the softness, skin-compatibility, adhesion, and abrasion resistance of the coating formed by electrostatic spraying from fibers, and further from the viewpoint of obtaining excellent sebum resistance through coating, the mass ratio ((c) / (d)) of component (c) to component (d) in the coating-forming composition is preferably 0.0033 or more, more preferably 0.0050 or more, even more preferably 0.0066 or more, even more preferably 0.01 or more, even more preferably 0.03 or more, even more preferably 0.05 or more, even more preferably 0.066 or more, even more preferably 0.1 or more, and even more preferably 0.2 or more. Furthermore, it is preferably 30 or less, more preferably 25 or less, even more preferably 20 or less, even more preferably 15 or less, even more preferably 10 or less, even more preferably 7.0 or less, even more preferably 5 or less, and even more preferably 3 or less. The (c) / (d) is preferably 0.0033 or more and 30 or less, more preferably 0.0050 or more and 25 or less, even more preferably 0.0066 or more and 20 or less, and even more preferably 0.01 or more and 15 or less. Furthermore, it is preferably 0.03 or more and 10 or less, more preferably 0.05 or more and 7.0 or less, even more preferably 0.066 or more and 5 or less, even more preferably 0.1 or more and 5 or less, and even more preferably 0.2 or more and 3 or less.

[0068] From the viewpoint of obtaining excellent sebum resistance in a coating formed from fibers by electrostatic spraying, the mass ratio ((a) / (d)) of component (a) to component (d) in the coating-forming composition is preferably 0.0033 or more, more preferably 0.005 or more, even more preferably 0.0066 or more, even more preferably 0.01 or more, even more preferably 0.02 or more, even more preferably 0.03 or more, even more preferably 0.066 or more, even more preferably 0.1 or more, even more preferably 0.3 or more, even more preferably 0.5 or more, and even more preferably 0.8 or more. Furthermore, it is preferably 30 or less, more preferably 25 or less, even more preferably 20 or less, even more preferably 15 or less, even more preferably 13 or less, even more preferably 10 or less, and even more preferably 8.0 or less. The (a) / (d) is preferably 0.0033 or more but less than 30, more preferably 0.005 or more but less than 25, even more preferably 0.0066 or more but less than 20, even more preferably 0.01 or more but less than 15, and even more preferably 0.02 or more but less than 13. Furthermore, it is preferably 0.03 or more but less than 10, more preferably 0.066 or more but less than 10, even more preferably 0.10 or more but less than 8.0, even more preferably 0.30 or more but less than 8.0, even more preferably 0.50 or more but less than 8.0, and even more preferably 0.80 or more but less than 8.0.

[0069] In addition to the components described above, the composition for coating formation may also contain a conductivity control agent, an oil (other than components (c) and (d), a coloring pigment, an extender pigment, a dye, a fragrance, a repellent, an antioxidant, a stabilizer, a preservative, various vitamins, water, etc. As a conductivity control agent, from the viewpoint of improving conductivity, an alkali metal salt or an ammonium salt is preferred, an ionic surfactant is more preferred, and one or more selected from cationic and anionic surfactants are even more preferred.

[0070] Regarding the content of the conductivity control agent in the coating forming composition, there is no limitation as long as it is an amount that brings the conductivity of the composition to the range described above. From the viewpoint of stably forming a coating and preventing excessive increase in conductivity, it is preferably 0.01% by mass or more and 10% by mass or less, more preferably 0.05% by mass or more, even more preferably 0.1% by mass or more, more preferably 8% by mass or less, even more preferably 6% by mass or less, even more preferably 2.5% by mass or less, and even more preferably 2% by mass or less.

[0071] Regarding the viscosity of the coating-forming composition, from the viewpoints of stably forming a fiber-based coating on the skin, spinnability during electrostatic spraying, fiber drying, and fiber fineness, it is preferably 2 mPa·s or more at 25°C, more preferably 5 mPa·s or more, further preferably 10 mPa·s or more, even more preferably 30 mPa·s or more, even more preferably 50 mPa·s or more, and even more preferably 80 mPa·s or more. Furthermore, it is preferably 3000 mPa·s or less, more preferably 2000 mPa·s or less, further preferably 1500 mPa·s or less, even more preferably 1000 mPa·s or less, even more preferably 800 mPa·s or less, and even more preferably 500 mPa·s or less. The viscosity range of the coating-forming composition is preferably 2 mPa·s to 3000 mPa·s, more preferably 5 mPa·s to 2000 mPa·s, even more preferably 10 mPa·s to 1500 mPa·s, even more preferably 30 mPa·s to 1000 mPa·s, even more preferably 50 mPa·s to 800 mPa·s, and even more preferably 80 mPa·s to 500 mPa·s. The viscosity of the coating-forming composition is measured using a Type B viscometer at 25°C. For example, a Type B viscometer (TVB-10M) manufactured by Toki Sangyo Co., Ltd. can be used. The measurement conditions are set at 25°C. This measurement temperature is the temperature of the coating-forming composition. The type of rotor and the rotor speed can be selected according to the viscosity of the coating-forming composition and the specifications of the measuring equipment used. For example, when using the Type B viscometer (TVB-10M) manufactured by Toki Sangyo Co., Ltd., the viscosity of the film-forming composition can be measured at 6 rpm using the M2 rotor when it is 2500 mPa·s or higher; at 12 rpm when it is 1000 mPa·s or higher but less than 2500 mPa·s; at 30 rpm when it is 500 mPa·s or higher but less than 1000 mPa·s; at 60 rpm when it is 100 mPa·s or higher but less than 500 mPa·s; and at 60 rpm using the M1 rotor when it is less than 100 mPa·s. Furthermore, the specifications for the Type B viscometer (TVB-10M) manufactured by Toki Sangyo Co., Ltd. also specify measurement conditions other than those mentioned above, allowing for viscosity measurement under other conditions depending on the viscosity of the film-forming composition.

[0072] To form a fiber-formed coating on the skin using the coating-forming composition of the present invention, there are methods for forming a fiber-formed coating directly on the skin by electrostatic spraying; and methods for forming a fiber-formed coating on a substrate by electrostatic spraying and applying the coating to the skin. Next, the method for forming a fiber-formed coating directly on the skin by electrostatic spraying will be described.

[0073] The coating-forming composition is sprayed directly onto the skin at the site where a coating is desired using an electrostatic spraying method. The electrostatic spraying method includes the step of electrostatically spraying the coating-forming composition onto the skin using an electrostatic spraying device. The electrostatic spraying device essentially comprises a container for holding the composition, a nozzle for spraying the composition, a supply device for supplying the composition held in the container to the nozzle, and a power source for applying voltage to the nozzle.

[0074] exist Figure 1 The figure shows a schematic diagram illustrating the configuration of the electrostatic spraying device preferred for use in this invention. The electrostatic spraying device 10 shown in the figure has a low-voltage power supply 11. The low-voltage power supply 11 is capable of generating a voltage of several V to tens of V. For the purpose of improving the portability of the electrostatic spraying device 10, the low-voltage power supply 11 is preferably composed of one or more batteries. Furthermore, using batteries as the low-voltage power supply 11 has the advantage of being easy to replace as needed. An AC adapter or the like can also be used instead of batteries as the low-voltage power supply 11.

[0075] The electrostatic spraying device 10 also has a high-voltage power supply 12. The high-voltage power supply 12 is connected to a low-voltage power supply 11 and has a circuit (not shown) that boosts the voltage generated by the low-voltage power supply 11 to a high voltage. The boost circuit is typically composed of a transformer, a capacitor, and semiconductor components.

[0076] The electrostatic spraying device 10 also includes an auxiliary circuit 13. The auxiliary circuit 13 is located between the low-voltage power supply 11 and the high-voltage power supply 12, and has the function of adjusting the voltage of the low-voltage power supply 11 and stabilizing the operation of the high-voltage power supply 12. Furthermore, the auxiliary circuit 13 has the function of controlling the rotational speed of the motor of the micro gear pump 14 (described later). By controlling the rotational speed of the motor, the amount of coating composition supplied from the container 15 of the coating composition to the micro gear pump 14 can be controlled. A switch SW is installed between the auxiliary circuit 13 and the low-voltage power supply 11, and by switching the switch SW, the electrostatic spraying device 10 can be started / stopped.

[0077] The electrostatic spraying device 10 also includes a nozzle 16. The nozzle 16 is made of various conductive materials, such as metal, or non-conductive materials such as plastic, rubber, or ceramic, and is shaped to spray the coating-forming composition from its front end. A tiny space within the nozzle 16 through which the coating-forming composition flows is formed along the length of the nozzle 16. The size of the cross-section of this tiny space, expressed as diameter, is preferably 100 μm or more and 1000 μm or less.

[0078] Nozzle 16 is connected to miniature gear pump 14 via conduit 17. Conduit 17 can be a conductor or a non-conductor. Additionally, nozzle 16 is electrically connected to high-voltage power supply 12. This allows high voltage to be applied to nozzle 16. To prevent large currents from flowing when a person directly contacts nozzle 16, nozzle 16 is electrically connected to high-voltage power supply 12 via current-limiting resistor 19.

[0079] The micro gear pump 14, which is connected to the nozzle 16 via the conduit 17, functions as a supply device for supplying the coating composition contained in the container 15 to the nozzle 16. The micro gear pump 14 operates by receiving power from the low-voltage power supply 11. In addition, the micro gear pump 14 is configured to supply a predetermined amount of the coating composition to the nozzle 16 under the control of the auxiliary circuit 13.

[0080] Container 15 is connected to a micro gear pump 14 via a flexible conduit 18. Container 15 contains a coating-forming composition. Container 15 is preferably made in a replaceable, cartridge-like form.

[0081] The electrostatic spraying device 10 with the above structure is, for example, capable of... Figure 2 Use it as shown. Figure 2 The figure shows a handheld electrostatic spraying device 10 with a size that can be held in one hand. In the electrostatic spraying device 10 shown in this figure, Figure 1 All components shown in the structural diagram are housed within a cylindrical housing 20. A nozzle (not shown) is disposed at one end 10a along the length of the housing 20. The nozzle is positioned within the housing 20 such that the direction of the composition's ejection is aligned with the longitudinal direction of the housing 20, and is convex toward the skin. Because the nozzle tip is convex toward the skin along the longitudinal direction of the housing 20, the film-forming composition does not easily adhere to the housing, enabling stable film formation.

[0082] When the electrostatic spray device 10 is in operation, the user, i.e., the person who wants to form a film on the skin by electrostatic spraying, holds the device 10 in their hand, with one end 10a of the device 10, which is equipped with a nozzle (not shown), facing the application site of the electrostatic spray. Figure 2The image shows the electrostatic spray device 10 with one end 10a facing the inside of the user's forearm. In this state, the switch of the device 10 is turned on to perform electrostatic spraying. By supplying power to the device 10, an electric field is generated between the nozzle and the skin.

[0083] exist Figure 2 In the illustrated embodiment, a positive high voltage is applied to the nozzle, and the skin becomes the negative electrode. If an electric field is generated between the nozzle and the skin, the coating-forming composition at the nozzle tip will be polarized due to electrostatic induction, and the tip will become conical. The charged droplets of the coating-forming composition are ejected from the cone tip along the electric field toward the skin into the air. If the solvent component (b) evaporates from the charged coating-forming composition ejected into the air, the charge density on the surface of the coating-forming composition becomes excessive, and it repeatedly atomizes due to Coulomb repulsion and travels through the air to reach the skin. In this case, by appropriately adjusting the viscosity of the coating-forming composition, it is also possible to cause the volatile substances that are the solvent to evaporate from the droplets during the process of being ejected into the air, to solidify the polymer of the coating-forming component (a) that is the solute, and to elongate and deform it through the potential difference to form fibers, which are then deposited at the application site. For example, when the viscosity of the coating-forming composition is increased, it is easier for the composition to deposit at the application site in the form of fibers. Thus, a porous film composed of fiber deposits is formed on the surface of the application site. Such a porous film composed of fiber deposits can also be formed by adjusting the distance between the nozzle and the skin and the voltage applied to the nozzle.

[0084] During electrostatic spraying, a high potential difference is generated between the nozzle and the skin. However, due to the extremely high impedance, the current flowing through the human body is extremely small. The inventors have confirmed that the current flowing through the human body during electrostatic spraying is several orders of magnitude smaller than, for example, the current flowing through the human body due to static electricity generated in everyday life.

[0085] When the fiber deposit is formed by electrostatic spraying, the fiber thickness, expressed as a circular equivalent diameter, is preferably 10 nm or more, more preferably 50 nm or more. Furthermore, it is preferably 3000 nm or less, more preferably 1000 nm or less, and even more preferably 800 nm or less. The fiber thickness can be observed, for example, by using a scanning electron microscope (SEM), magnifying the fiber to 10000x, removing defects (fiber blocks, fiber intersections, droplets) from its two-dimensional image, arbitrarily selecting 10 fibers, drawing a line orthogonal to the fiber's length direction, and directly reading the fiber diameter.

[0086] The fibers of the present invention are preferably continuous fibers, and preferably have a length of at least 100 times the fiber thickness. For example, the formed coating preferably contains fibers containing component (a) with a length of preferably 10 μm or more, more preferably 50 μm or more, and even more preferably 100 μm or more.

[0087] In this specification, a fiber having a length of 100 times or more than its thickness is defined as a "continuous fiber". The cross-sectional shape of the fiber is preferably circular or elliptical, and the thickness of the fiber is the diameter in the case of a circular fiber and the length of the major axis in the case of an elliptical fiber. Furthermore, the coating produced by electrostatic spraying is preferably a porous discontinuous coating composed of an accumulation of one or more continuous fibers.

[0088] According to the electrostatic spraying method, the composition for coating formation is charged and sprayed. Under high humidity conditions, it is affected by the moisture in the atmosphere. However, by containing a conductivity control agent, it is not easily affected by this.

[0089] The method for manufacturing the coating-forming composition may involve stirring a mixture containing all the components, but preferably, after step 1 of stirring the mixture 1 containing components other than component (a), a step 2 of adding component (a) and stirring is included. Alternatively, the method may include step 1 of mixing component (a) with a portion of component (b); step 2 of mixing the remaining portion of component (b) with components (c) and (d); and step 3 of mixing the mixture from step 1 with the mixture from step 2. These steps 1, 2, and 3 are preferably performed at room temperature of 10°C to 30°C.

[0090] The distance between the nozzle and the skin also depends on the voltage applied to the nozzle, and is preferably 10 mm or more, more preferably 20 mm or more, and even more preferably 40 mm or more. Furthermore, it is preferably 160 mm or less, more preferably 140 mm or less, and even more preferably 120 mm or less. Maintaining a distance between the nozzle and the skin within this range improves the film-forming properties. The distance between the nozzle and the skin can be measured using commonly used non-contact sensors or the like.

[0091] Regardless of whether the coating formed by electrostatic spraying is porous, the preferred basis weight of the coating is 0.10 g / m³. 2 The above, more preferably 1.0 g / m 2 The above. Furthermore, 50g / m³ is preferred. 2 The following is more preferably 40g / m 2 The preferred basis weight of the resulting coating is 0.10 g / m³. 2 Above 50g / m 2 The following is more preferably 1.0 g / m 2 Above 40g / m2 The following is an explanation of how setting the weight of the coating improves its skin integration, adhesion, abrasion resistance, and sebum resistance.

[0092] Regarding the above-described embodiments, the present invention further discloses the following compositions and methods.

[0093] <1> A composition for coating formation, comprising the following components (a), (b), (c) and (d),

[0094] (a) Polymers with film-forming capabilities;

[0095] (b) Selected from one or more volatile substances of alcohols and ketones;

[0096] (c) Plasticizers;

[0097] (d) Non-volatile oils with a viscosity of 50 mP·s or more and 3000 mP·s or less at 35°C, other than component (c), are 3% by mass or less and 15% by mass.

[0098] <2> The coating-forming composition as described in <1>, wherein component (a) is a water-insoluble polymer with coating-forming ability, preferably selected from fully saponified polyvinyl alcohol that can be insoluble after coating formation, partially saponified polyvinyl alcohol that can be crosslinked after coating formation by use with a crosslinking agent, oxazoline-modified organosilicon such as poly(N-propionylethyleneimine) grafted-dimethylsiloxane / γ-aminopropylmethylsiloxane copolymer, polyvinyl acetal diethylaminoacetate, corn protein (the main component of corn protein), polyester, polylactic acid (PLA), polyacrylonitrile resin, polymethyl... The resin comprises one or more of acrylic resins such as acrylic resins, polystyrene resins, polyvinyl butyral resins, polyethylene terephthalate resins, polybutylene terephthalate resins, polyurethane resins, polyamide resins, polyimide resins, and polyamide-imide resins, more preferably one or more of fully saponified polyvinyl alcohol that can be insoluble after forming a coating, partially saponified polyvinyl alcohol that can be crosslinked after forming a coating by using it in combination with a crosslinking agent, polyvinyl butyral resins, polyurethane resins, oxazoline-modified organosilicon, polyvinyl acetal diethylaminoacetate, and corn protein.

[0099] <3> The coating-forming composition as described in <1> or <2>, wherein the content of component (a) is preferably 1.0% by mass or more, more preferably 2.0% by mass or more, further preferably 4.0% by mass or more, even more preferably 6.0% by mass or more, even more preferably 8.0% by mass or more, and preferably 35% by mass or less, more preferably 30% by mass or less, even more preferably 25% by mass or less, even more preferably 20% by mass or less, and preferably 1.0% by mass or more and 30% by mass or less, more preferably 2.0% by mass or less. The content is more than 25% by mass and more preferably 4.0% by mass and more than 20% by mass, even more preferably 6.0% by mass and more than 20% by mass, and preferably 2.0% by mass and more than 35% by mass, more preferably 4.0% by mass and more than 30% by mass, even more preferably 6.0% by mass and more than 30% by mass, even more preferably 6.0% by mass and more than 25% by mass, even more preferably 8.0% by mass and more than 25% by mass, and even more preferably 8.0% by mass and more than 20% by mass.

[0100] <4> The coating-forming composition as described in any one of <1> to <3>, wherein the content of component (a) is 2.0% by mass or more and 25% by mass or less.

[0101] <5> The coating-forming composition as described in any one of <1> to <3>, wherein the content of component (a) is 6.0% by mass or more and 30% by mass or less.

[0102] <6> The coating-forming composition as described in any one of <1> to <5>, wherein the vapor pressure of component (b) at 20°C is preferably 0.01 kPa or more and 106.66 kPa or less, more preferably 0.13 kPa or more and 66.66 kPa or less, even more preferably 0.67 kPa or more and 40.00 kPa or less, even more preferably 1.33 kPa or more and 40.00 kPa or less, and even more preferably 2.40 kPa or more and 40.00 kPa or less.

[0103] <7> The coating-forming composition as described in any one of <1> to <6>, wherein the alcohol of component (b) is preferably selected from one or more of mono-chain aliphatic alcohols, mono-cyclic aliphatic alcohols and mono-aromatic alcohols, preferably selected from one or more of mono-chain aliphatic alcohols having a chain with 1 to 6 carbon atoms and having a straight chain or branched chain, mono-cyclic aliphatic alcohols having 4 to 6 carbon atoms, benzyl alcohol and phenylethanol, and more preferably selected from one or more of ethanol, isopropanol, n-butanol, phenylethanol, n-propanol and n-pentanol.

[0104] <8> The coating-forming composition as described in any one of <1> to <7>, wherein the ketone of component (b) is preferably a ketone having two alkyl groups having 1 to 4 carbon atoms, and more preferably one or more selected from acetone, methyl ethyl ketone and methyl isobutyl ketone.

[0105] <9> The coating-forming composition as described in any one of <1> to <8>, wherein component (b) is preferably selected from one or more of ethanol, isopropanol and n-butanol, more preferably selected from one or more of ethanol and isopropanol, and even more preferably ethanol.

[0106] <10> The coating-forming composition as described in any one of <1> to <9>, wherein the content of component (b) is preferably 45% by mass or more, more preferably 50% by mass or more, further preferably 55% by mass or more, even more preferably 60% by mass or more, and preferably 98.8% by mass or less, more preferably 98% by mass or less, further preferably 97% by mass or less, even more preferably 96% by mass or less, even more preferably 94% by mass or less, even more preferably 91% by mass or less, even more preferably 88.5% by mass or less, and preferably 50% by mass or more and 98.8% by mass or less, more preferably 50% by mass or more and 98% by mass or less, further preferably 55% by mass or more and 96% by mass or less, even more preferably 60% by mass or more and 94% by mass or less, and preferably 45% by mass or more and 97% by mass or less, more preferably 50% by mass or more and 94% by mass or less, further preferably 50% by mass or more and 91% by mass or less, and even more preferably 50% by mass or more and 88.5% by mass or less.

[0107] <11> The coating-forming composition as described in any one of <1> to <10>, wherein the content of component (b) is 50% by mass or more and 98% by mass or less.

[0108] <12> The coating-forming composition as described in any one of <1> to <10>, wherein the content of component (b) is 50% by mass or more and 91% by mass or less.

[0109] <13> The film-forming composition as described in any one of <1> to <12>, wherein component (c) is one or more selected from polyols, polyoxyalkylene glycols, polyoxyalkylene ethers, ester oils, silicone oils, hydrocarbon oils, liquid greases, solid greases, higher alcohols and nonionic surfactants.

[0110] <14> The film-forming composition as described in any one of <1> to <13>, wherein component (c) is a compound that readily interacts with the hydroxyl, ester, or acetal portion of the structure of a polymer capable of forming a film, preferably selected from one or more of polyols, polyoxyalkylene glycols, polyoxyalkylene ethers, specific ester oils, specific silicone oils, and nonionic surfactants, more preferably selected from one or more of polyols, polyoxyalkylene glycols, monoacylglycerols, diacylglycerols, malate esters, N-acyl amino acid esters, ethylhexyl methoxycinnamate, and alkyl benzoate esters.

[0111] <15> The coating-forming composition as described in any one of <1> to <14>, wherein the content of component (c) is preferably 0.10% by mass or more, more preferably 0.50% by mass or more, further preferably 1.0% by mass or more, even more preferably 1.5% by mass or more, and preferably 30% by mass or less, more preferably 25% by mass or less, further preferably 20% by mass or less, even more preferably 15% by mass or less, and preferably 0.10% by mass or more and 30% by mass or less, more preferably 0.50% by mass or more and 25% by mass or less, further preferably 1.0% by mass or more and 20% by mass or less, even more preferably 1.0% by mass or more and 15% by mass or less, and preferably 0.50% by mass or more and 30% by mass or less, more preferably 1.0% by mass or more and 25% by mass or less, further preferably 1.0% by mass or more and 20% by mass or less, even more preferably 1.5% by mass or more and 15% by mass or less.

[0112] <16> The coating-forming composition as described in any one of <1> to <15>, wherein the content of component (c) is 0.50% by mass or more and 25% by mass or less.

[0113] <17> The coating-forming composition as described in any one of <1> to <15>, wherein the content of component (c) is 1.0% by mass or more and 20% by mass or less.

[0114] <18> The film-forming composition as described in any one of <1> to <17>, wherein the preferred viscosity of component (d) at 35°C is 100 mP·s or more and 2800 mP·s or less, more preferably 150 mP·s or more and 2500 mP·s or less, and even more preferably 200 mP·s or more and 2000 mP·s or less.

[0115] <19> The coating-forming composition as described in any one of <1> to <18>, wherein component (d) is one or more selected from ester oils and hydrocarbon oils.

[0116] <20> The coating-forming composition as described in any one of <1> to <19>, wherein component (d) is one or more non-volatile oils selected from pentaerythritol tetraethylhexanoate, glyceryl diisostearate, glyceryl triisooctanoate, pentaerythritol tetra(benzyl / benzoic / ethylhexanoate), dipentaerythritol fatty acid ester, di(2-heptylundecanoic acid) glyceryl ester, glyceryl trioctanoate, glyceryl triisopalmitoate, glyceryl tri(2-ethylhexanoate), glyceryl trimyridine, glyceryl tri(2-heptylundecanoic acid), acetylglycine, mono-fatty acid glyceryl ester, di-fatty acid glyceryl ester, tri-fatty acid glyceryl ester, etc.; acyl amino acid diesters such as lauroylglutamate di(phytosterol / octyldodecyl) ester; neopentyl glycol didecanoate; liquid paraffin; isododecane; paraffin; and petrolatum.

[0117] <21> The coating-forming composition as described in any one of <1> to <20>, wherein the content of component (d) is preferably 3% by mass or more and 15% by mass or less, more preferably 3.5% by mass or more and 15% by mass or less, even more preferably 4% by mass or more and 15% by mass or less, and even more preferably 5% by mass or more and 15% by mass or less.

[0118] <22> The coating-forming composition as described in any one of <1> to <21>, wherein the mass ratio of component (a) to component (c) ((a) / (c)) is preferably 0.033 or more, more preferably 0.10 or more, further preferably 0.20 or more, even more preferably 0.40 or more, even more preferably 0.80 or more, even more preferably 1.0 or more, even more preferably 1.5 or more, and preferably 300 or less, more preferably 60 or less, even more preferably 30 or less, and even more preferably 20 or less. More preferably, the value is 15 or less, more preferably 10 or less, more preferably 8.0 or less, and preferably 0.033 or more and 300 or less, more preferably 0.10 or more and 60 or less, more preferably 0.20 or more and 30 or less, more preferably 0.40 or more and 10 or less, more preferably 1.0 or more and 10 or less, and preferably 0.80 or more and 20 or less, more preferably 1.0 or more and 15 or less, more preferably 1.0 or more and 10 or less, and more preferably 1.5 or more and 8.0 or less.

[0119] <23> The coating-forming composition as described in any one of <1> to <22>, wherein the mass ratio of the content of component (a) to component (c) ((a) / (c)) is 0.2 or more and 30 or less.

[0120] <24> The coating-forming composition as described in any one of <1> to <22>, wherein the mass ratio of the content of component (a) to component (c) ((a) / (c)) is 1.0 or more and 10 or less.

[0121] <25> The coating-forming composition as described in any one of <1> to <24>, wherein the mass ratio of component (c) to component (d) ((c) / (d)) is preferably 0.0033 or more, more preferably 0.0050 or more, even more preferably 0.0066 or more, even more preferably 0.01 or more, even more preferably 0.03 or more, even more preferably 0.05 or more, even more preferably 0.066 or more, even more preferably 0.1 or more, even more preferably 0.2 or more, preferably 30 or less, more preferably 25 or less, even more preferably 20 or less. More preferably, it is 15 or less, more preferably 10 or less, more preferably 7.0 or less, more preferably 5 or less, more preferably 3 or less, preferably 0.0033 or more and 30 or less, more preferably 0.0050 or more and 25 or less, more preferably 0.0066 or more and 20 or less, more preferably 0.01 or more and 15 or less, more preferably 0.03 or more and 10 or less, more preferably 0.05 or more and 7.0 or less, more preferably 0.066 or more and 5 or less, more preferably 0.10 or more and 5 or less, more preferably 0.2 or more and 3 or less.

[0122] <26> The coating-forming composition as described in any one of <1> to <25>, wherein the mass ratio of component (c) to component (d) ((c) / (d)) is 0.03 or more and 10 or less.

[0123] <27> The coating-forming composition as described in any one of <1> to <25>, wherein the mass ratio of component (c) to component (d) ((c) / (d)) is 0.2 or more and 3 or less.

[0124] <28> The coating-forming composition as described in any one of <1> to <27>, wherein the mass ratio of component (a) to component (b) ((a) / (b)) is preferably 0.010 or more, more preferably 0.060 or more, even more preferably 0.080 or more, even more preferably 0.10 or more, even more preferably 0.11 or more, even more preferably 0.12 or more, and preferably 0.60 or less, more preferably 0.45 or less, even more preferably 0.35 or less, even more preferably 0.33 or less, even more preferably 0.30 or less, even more preferably 0.25 or less, and even more preferably... The preferred value is 0.20 or less, more preferably 0.18 or less, and even more preferably 0.010 or more and 0.60 or less, more preferably 0.060 or more and 0.33 or less, even more preferably 0.10 or more and 0.25 or less, even more preferably 0.11 or more and 0.20 or less, even more preferably 0.12 or more and 0.18 or less, and even more preferably 0.060 or more and 0.45 or less, more preferably 0.080 or more and 0.35 or less, even more preferably 0.10 or more and 0.33 or less, even more preferably 0.11 or more and 0.30 or less, and even more preferably 0.12 or more and 0.25 or less.

[0125] <29> The coating-forming composition as described in any one of <1> to <28>, wherein the mass ratio of the content of component (a) to component (b) ((a) / (b)) is 0.10 or more and 0.25 or less.

[0126] <30> The coating-forming composition as described in any one of <1> to <28>, wherein the mass ratio of the content of component (a) to component (b) ((a) / (b)) is 0.11 or more and 0.30 or less.

[0127] <31> The coating-forming composition as described in any one of <1> to <30>, wherein the mass ratio of component (a) to component (d) ((a) / (d)) is preferably 0.0033 or more, more preferably 0.005 or more, even more preferably 0.0066 or more, even more preferably 0.01 or more, even more preferably 0.02 or more, even more preferably 0.03 or more, even more preferably 0.066 or more, even more preferably 0.1 or more, even more preferably 0.3 or more, even more preferably 0.5 or more, even more preferably 0.8 or more, preferably 30 or less, more preferably 25 or less, even more preferably 20 or less, even more preferably 30 or less, more preferably 25 or less, even more preferably 20 or less, even more preferably 25 ... The value is preferably 15 or less, more preferably 13 or less, more preferably 10 or less, more preferably 8.0 or less, preferably 0.0033 or more and 30 or less, more preferably 0.005 or more and 25 or less, more preferably 0.0066 or more and 20 or less, more preferably 0.01 or more and 15 or less, more preferably 0.02 or more and 13 or less, more preferably 0.03 or more and 10 or less, more preferably 0.066 or more and 10 or less, more preferably 0.10 or more and 8.0 or less, more preferably 0.30 or more and 8.0 or less, more preferably 0.50 or more and 8.0 or less, more preferably 0.80 or more and 8.0 or less.

[0128] <32> The coating-forming composition as described in any one of <1> to <31>, wherein the mass ratio of the content of component (a) to component (d) ((a) / (d)) is 0.02 or more and 13 or less.

[0129] <33> The coating-forming composition as described in any one of <1> to <31>, wherein the mass ratio of the content of component (a) to component (d) ((a) / (d)) is 0.80 or more and 8.0 or less.

[0130] <34> A coating-forming composition as described in any one of <1> to <33>, wherein the composition comprises an oil, coloring pigment, extender pigment, dye, fragrance, repellent, antioxidant, stabilizer, preservative, various vitamins and water, selected from a conductivity control agent, oils other than components (c) and (d).

[0131] <35> The coating forming composition as described in <34>, wherein the conductivity control agent is preferably a component that makes the conductivity of the coating forming composition 10 μS / cm or more and 300 μS / cm or less at 25°C.

[0132] <36> The coating-forming composition as described in <34> or <35>, wherein the conductivity control agent is preferably an alkali metal salt or an ammonium salt, more preferably an ionic surfactant, and even more preferably one or more selected from cationic surfactants and anionic surfactants.

[0133] <37> The coating-forming composition as described in any one of <34> to <36>, wherein the conductivity control agent is one or more selected from quaternary ammonium salts and acyl amino acid salts.

[0134] <38> The coating-forming composition as described in any one of <34> to <37>, wherein the content of the conductivity control agent is preferably 0.010% by mass or more, more preferably 0.050% by mass or more, even more preferably 0.10% by mass or more, and preferably 10% by mass or less, more preferably 8.0% by mass or less, even more preferably 6.0% by mass or less, even more preferably 2.5% by mass or less, even more preferably 2.0% by mass or less, and preferably 0.010% by mass or more and 10% by mass or less, more preferably 0.050% by mass or more and 8.0% by mass or less, even more preferably 0.10% by mass or more and 6.0% by mass or less, even more preferably 0.10% by mass or more and 2.5% by mass or less, and even more preferably 0.10% by mass or more and 2.0% by mass or less.

[0135] <39> The coating-forming composition as described in any one of <1> to <38>, wherein the viscosity of the coating-forming composition at 25°C is preferably 2 mPa·s or more, more preferably 5 mPa·s or more, further preferably 10 mPa·s or more, even more preferably 30 mPa·s or more, even more preferably 50 mPa·s or more, even more preferably 80 mPa·s or more, and preferably 3000 mPa·s or less, more preferably 2000 mPa·s or less, even more preferably 1500 mPa·s or less, and even more preferably 1000 mPa·s or less. More preferably, it is 800 mPa·s or less, even more preferably 500 mPa·s or less, and preferably 2 mPa·s or more and 3000 mPa·s or less, more preferably 5 mPa·s or more and 2000 mPa·s or less, even more preferably 10 mPa·s or more and 1500 mPa·s or less, even more preferably 30 mPa·s or more and 1000 mPa·s or less, even more preferably 50 mPa·s or more and 800 mPa·s or less, and even more preferably 80 mPa·s or more and 500 mPa·s or less.

[0136] <40> A film-forming composition as described in any one of <1> to <39>, wherein it is a composition for forming a fiber-formed film directly on the skin by electrostatic spraying.

[0137] <41> A sheet composition for skin use, wherein it is obtained by electrostatic spraying of a composition containing the following ingredients (a), (b), (c) and (d).

[0138] (a) Polymers with film-forming capabilities;

[0139] (b) Selected from one or more volatile substances of alcohols and ketones;

[0140] (c) Plasticizers;

[0141] (d) Non-volatile oils with a viscosity of 50 mP·s or more and 3000 mP·s or less at 35°C, other than component (c), are 3% by mass or less and 15% by mass.

[0142] <42> The skin sheet composition as described in <41>, wherein component (d) is one or more non-volatile oils selected from pentaerythritol tetraethylhexanoate, glyceryl diisostearate, glyceryl triisooctanoate, pentaerythritol tetra(benzyl / benzoic / ethylhexanoate), dipentaerythritol fatty acid ester, di(2-heptylundecanoic acid) glyceryl, trioctanoic acid glyceryl, triisopalmitoate glyceryl, tri(2-ethylhexanoic acid) glyceryl, trimyristic acid glyceryl, tri(2-heptylundecanoic acid) glyceryl, acetylglycine glyceryl, mono-fatty acid glyceryl, di-fatty acid glyceryl, tri-fatty acid glyceryl, lauroylglutamate di(phytosterol / octyldodecyl) ester, neopentyl glycol didecanoate, liquid paraffin, isododecane, paraffin and petrolatum.

[0143] <43> The skin sheet composition as described in <41> or <42>, wherein (c) the plasticizer is one or more selected from polyols, polyoxyalkylene glycols, mono- and di-fatty acid glycerides, malic acid esters, N-acyl amino acid esters, ethylhexyl methoxycinnamate and alkyl benzoate.

[0144] Example

[0145] The present invention will now be described in more detail with reference to embodiments. However, the scope of the present invention is not limited to these embodiments. Unless otherwise specified, "%" refers to "mass %".

[0146] [Experimental Example 1]

[0147] [Examples 1-7, Comparative Examples 1-4]

[0148] (1) Preparation of the composition for coating formation

[0149] As component (a) of the coating-forming composition, polyvinyl butyral (manufactured by Sekisui Chemicals Co., Ltd.: trade name; S-Lec B BM-1) is used; as component (b) 99% synthetic ethanol (manufactured by Nippon Synthetic Alcohol Co., Ltd.) is used. Additionally, as component (c) polyethylene glycol (average molecular weight 400) is used; and as component (d) a mixture of (d1) neopentyl glycol didecanoate and (d2) dipentaerythritol fatty acid ester (melting point 50°C) is used after adjusting the viscosity at 35°C. Furthermore, the content of each component shown in Tables 1 and 2 is the effective amount, in mass%.

[0150] Take a pre-mixed mixture of components (a) and (b), as well as components (c) and (d), and add them to a 1000 mL SUS304 measuring cup (manufactured by TRUSCO NAKAYAMA Corporation). Use a homogenizer (manufactured by PRIMIX Corporation: TKRobomix) and stir for 10 minutes at room temperature (20°C–30°C). Use 50 mm diameter blades and a rotation speed of 3000 rpm for the homogenizer. After stirring, a homogeneous and transparent solution is obtained. This is used as a coating-forming composition. The preparation scale of the coating-forming composition is such that the total weight of the coating-forming composition reaches 500 g.

[0151] (2) Viscosity of component (d)

[0152] After mixing the two oils, the mixture was stored in a water bath at 35°C for 24 hours. The viscosity of component (d) was then measured using a Type B viscometer at a temperature of 35°C. Here, the measurement temperature is the temperature of component (d). A Type B viscometer (TVB-10M) manufactured by Toki Sangyo Co., Ltd. was used, and measurements were performed with rotors of types M1, M2, and M4, and rotational speeds ranging from 3.0 rpm to 60 rpm.

[0153] (3) Electrostatic spraying process

[0154] Use with Figure 1 The structure shown and has Figure 2 The electrostatic spraying apparatus 10, as shown, electrostatically sprays the aforementioned coating-forming composition onto a portion (frame portion) with holes (3×8cm sections) cut from a 5×10cm aluminum foil for 30 seconds to form a fiber-based coating. The polymer content is 6.6mg (0.275mg / cm²). 2 ).

[0155] (4) Evaluation of sebum resistance

[0156] 10 μL of oleic acid (manufactured by Fujifilm and Wako Pure Chemical Industries, Ltd.: Wako I) as a sebum sample was dropped onto a fiber-formed coating within an aluminum foil frame, and the time until pores appeared in the coating was measured.

[0157] The results are shown in Tables 1 and 2.

[0158] [Table 1]

[0159]

[0160] [Table 2]

[0161]

[0162] (a) Polyvinyl butyral (manufactured by Sekisui Chemicals Co., Ltd.: trade name; S-Lec BBM-1)

[0163] (b) Ethanol (manufactured by Nippon Synthetic Alcohol Co., Ltd.: 99% synthetic ethanol)

[0164] (c) Polyethylene glycol (manufactured by Sanyo Chemical Industries, Ltd.: PEG-400(-G))

[0165] (d1) Neopentyl didecanoate (manufactured by The Nisshin OilliO Group Ltd.: ESTEMOL N-01)

[0166] (d2) Dipentaerythritol fatty acid ester (manufactured by The Nisshin OilliO Group Ltd.: COSMOL168EV)

[0167] Volatile silicone oil (manufactured by Shin-Etsu Chemical Co., Ltd.: KF-96L-2CS(-G))

[0168] As shown in Table 1, when the viscosity of component (d) at 35°C is between 50 mP·s and 3000 mP·s, it exhibits excellent sebum resistance. Furthermore, as shown in Table 2, when the content of component (d) is between 3% and 15% by mass, it also exhibits excellent sebum resistance.

[0169] In addition, the coating-forming compositions of the embodiments in Tables 1 and 2 were directly electrostatically sprayed onto the skin to form a fiber-based coating. The adhesion and abrasion resistance of the coating were evaluated. As a result, all coatings exhibited excellent adhesion and abrasion resistance.

[0170] [Experimental Example 2]

[0171] [Examples 8-11]

[0172] (1) Preparation of the composition for coating formation

[0173] As component (a) of the coating-forming composition, polyvinyl butyral is used; as component (b) 99% synthetic ethanol (manufactured by Nippon Seijin Co., Ltd.) is used. Additionally, as component (c) polyethylene glycol (average molecular weight 400), glycerin, PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin, 1,3-butanediol, or ethylhexyl methoxycinnamate is used; and as component (d) neopentyl glycol didecanoate, dipentaerythritol fatty acid ester (melting point 50°C), isononyl isononanoate, or isodecadecane, and palmitic dextrin are mixed and the viscosity at 35°C is adjusted before use. Furthermore, the content of each component shown in Table 3 is the effective amount, in mass%.

[0174] The pre-mixed components (a) and (b), as well as components (c) and (d), were measured and added to a 1000 mL SUS304 measuring cup (manufactured by TRUSCO NAKAYAMA Corporation). The mixture was stirred for 10 minutes at room temperature (20°C–30°C) using a homogenizer (manufactured by PRIMIX Corporation: TKRobomix). The homogenizer used 50 mm diameter blades and rotated at 3000 rpm. After stirring, a homogeneous and transparent solution was obtained. This solution was used as a coating-forming composition. The preparation scale of the coating-forming composition was such that the total weight of the coating-forming composition reached 500 g.

[0175] (2) Viscosity of component (d)

[0176] After mixing the non-volatile oil and palmitic dextrin, the mixture was stored in a water bath at 35°C for 24 hours. The viscosity of component (d) was then measured using a Type B viscometer at a temperature of 35°C. Here, the measurement temperature is the temperature of component (d). A Type B viscometer (TVB-10M) manufactured by Toki Sangyo Co., Ltd. was used, and measurements were performed with rotors of types M1, M2, and M4, and rotational speeds ranging from 3.0 rpm to 60 rpm.

[0177] (3) Electrostatic spraying process

[0178] Use with Figure 1 The structure shown and has Figure 2 The electrostatic spraying apparatus 10, as shown, electrostatically sprays the aforementioned coating-forming composition onto a portion (frame portion) with holes (3×8cm sections) cut from a 5×10cm aluminum foil for 30 seconds to form a fiber-based coating. The polymer content is 6.6mg (0.275mg / cm²). 2 ).

[0179] (4) Evaluation of sebum resistance

[0180] 10 μL of oleic acid (manufactured by Fujifilm Wako Pure Chemical Co., Ltd.: Wako I) as a sebum sample was dropped onto a fiber-formed coating within an aluminum foil frame, and the time it took for pores to appear in the coating was measured.

[0181] The results are shown in Table 3.

[0182] [Table 3]

[0183]

[0184]

[0185] *1: PEG-400(-G) (manufactured by Sanyo Chemical Industries, Ltd.)

[0186] *2: Wilbride S-753 (manufactured by NOF Corporation)

[0187] *3: KF-96L-2CS(-G) (Manufactured by Shin-Etsu Chemical Industry Co., Ltd.)

[0188] *4: ESTEMOL N-01 (manufactured by The Nisshin OilliO Group Ltd.)

[0189] *5: COSMOL 168EV (manufactured by The Nisshin OilliO Group Ltd.)

[0190] *6: Marukazole R (manufactured by Maruzen Petrochemical Co., Ltd.)

[0191] *7: 99% synthetic ethanol (manufactured by Nippon Synthetic Alcohol Co., Ltd.)

[0192] As shown in Table 3, the sebum resistance is excellent in all embodiments.

[0193] Explanation of symbols:

[0194] 10…Electrostatic spraying device; 11…Low voltage power supply; 12…High voltage power supply; 13…Auxiliary circuit; 14…Miniature gear pump; 15…Container; 16…Nozzle; 17…Pipeline; 18…Flexible pipeline; 19…Current limiting resistor; 20…Housing.

Claims

1. A composition for coating formation, wherein, It contains the following components (a), (b), (c) and (d): (a) 2.0% to 25% by mass of water-insoluble polymers with film-forming ability; (b) 50% to 98% by mass of one or more volatile substances selected from alcohols; (c) Plasticizer: 0.50% to 25% by mass; (d) Non-volatile oils with a viscosity of 200 mPa·s to 3000 mPa·s at 35°C, other than component (c), accounting for 5% to 15% by mass. Component (a) is polyvinyl butyral. Component (b) is one or more selected from mono-chain aliphatic alcohols, mono-cyclic aliphatic alcohols, and mono-aromatic alcohols. Component (c) plasticizer is one or more selected from polyols, PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerol and ethylhexyl methoxycinnamate. Component (d) is one or more non-volatile oils selected from dipentaerythritol fatty acid ester, neopentyl glycol didecanoate, isononyl isononanoate, and isododecane.

2. The coating-forming composition according to claim 1, wherein, The content of component (a) is more than 6.0% by mass and less than 25% by mass.

3. The coating-forming composition as described in claim 1 or 2, wherein, The content of component (b) is more than 50% by mass and less than 91% by mass.

4. The coating-forming composition according to claim 1 or 2, wherein, The mass ratio of component (c) to component (d) is between 0.03 and 10.

5. The coating-forming composition as described in claim 1 or 2, wherein, The mass ratio of component (c) to component (d) is between 0.2 and 3.

6. The coating-forming composition as described in claim 1 or 2, wherein, The mass ratio of component (a) to component (d) is between 0.02 and 13.

7. The coating-forming composition according to claim 1 or 2, wherein, The mass ratio of component (a) to component (d) is 0.8 to 8.

0.

8. The coating-forming composition as described in claim 1 or 2, wherein, The mass ratio of component (a) to component (c) is 0.2 to 30.

9. The coating-forming composition as described in claim 1 or 2, wherein, The mass ratio of component (a) to component (c) is 1.0 to 10.

10. The coating-forming composition according to claim 1 or 2, wherein, The mass ratio of component (c) to component (d) is between 0.03 and 10.

11. The coating-forming composition according to claim 1 or 2, wherein, The mass ratio of component (c) to component (d) is between 0.2 and 3.

12. The coating-forming composition according to claim 1 or 2, wherein, The mass ratio of component (a) to component (b) is 0.10 to 0.

25.

13. The coating-forming composition according to claim 1 or 2, wherein, The mass ratio of component (a) to component (b) is 0.11 to 0.

30.

14. The coating-forming composition as described in claim 1 or 2, wherein, The content of component (c) is more than 1.0% by mass and less than 20% by mass.

15. Use of the coating-forming composition according to any one of claims 1 to 14 in forming a fiber-formed coating directly on the skin by electrostatic spraying.

16. A sheet composition for skin application, wherein, It is obtained by electrostatic spraying a composition containing the following components (a), (b), (c) and (d). (a) 2.0% to 25% by mass of water-insoluble polymers with film-forming ability; (b) 50% to 98% by mass of one or more volatile substances selected from alcohols; (c) Plasticizer: 0.50% to 25% by mass; (d) Non-volatile oils with a viscosity of 200 mPa·s to 3000 mPa·s at 35°C, other than component (c), accounting for 5% to 15% by mass. Component (a) is polyvinyl butyral. Component (b) is one or more selected from mono-chain aliphatic alcohols, mono-cyclic aliphatic alcohols, and mono-aromatic alcohols. Component (c) plasticizer is one or more selected from polyols, PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerol and ethylhexyl methoxycinnamate. Component (d) is one or more non-volatile oils selected from dipentaerythritol fatty acid ester, neopentyl glycol didecanoate, isononyl isononanoate, and isododecane.

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