WO2018194088A1 - Procédé de production d'un film de revêtement - Google Patents

Procédé de production d'un film de revêtement Download PDF

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Publication number
WO2018194088A1
WO2018194088A1 PCT/JP2018/015982 JP2018015982W WO2018194088A1 WO 2018194088 A1 WO2018194088 A1 WO 2018194088A1 JP 2018015982 W JP2018015982 W JP 2018015982W WO 2018194088 A1 WO2018194088 A1 WO 2018194088A1
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Prior art keywords
component
mass
skin
composition
less
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PCT/JP2018/015982
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English (en)
Japanese (ja)
Inventor
智成 岡田
浅見　信之
直也 川上
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花王株式会社
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Publication of WO2018194088A1 publication Critical patent/WO2018194088A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
    • A61K8/34—Alcohols
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
    • A61K8/35—Ketones, e.g. benzophenone
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
    • A61Q1/02—Preparations containing skin colorants, e.g. pigments

Definitions

  • the present invention relates to a method for producing a coating.
  • Patent Document 1 describes a method for treating skin including electrostatic spraying of a composition onto the skin.
  • the composition used in this method includes a liquid insulating material, a conductive material, a particulate powder material, and a thickener.
  • cosmetics and skin care compositions containing pigments are typically used.
  • a cosmetic foundation is used as a composition. That is, the invention described in Patent Document 1 mainly assumes that the cosmetic foundation is made by electrostatic spraying for cosmetic purposes.
  • Patent Document 2 describes a disposable cartridge for use in a cosmetic electrostatic spray device.
  • This electrostatic spray device is a hand-held self-contained device.
  • This electrostatic spray device is used to spray a cosmetic foundation in the same manner as in Patent Document 1 described above.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2006-104211
  • Patent Document 2 Japanese Patent Application Publication No. 2003-507165
  • the present invention includes a liquid application step for applying a liquid containing a polymer to the skin by a method other than electrostatic spraying, A step of forming a film on the skin by electrostatic spraying the composition containing the component (a) and the component (b) directly on the skin in this order or in the reverse order.
  • the present invention provides a method for producing a coating on a substrate.
  • B A polymer having a film-forming ability.
  • FIG. 1 is a schematic view showing the configuration of an electrostatic spray apparatus suitably used in the present invention.
  • FIG. 2 is a schematic diagram illustrating a state where an electrostatic spray method is performed using an electrostatic spray apparatus.
  • the present invention is to improve the technique of the electrostatic spraying method on the skin, and more specifically, to improve the adhesion of the film formed on the skin by electrostatic spraying.
  • a liquid containing a polymer is applied by a method other than electrostatic spraying before or after a composition containing a volatile substance and a polymer having a film-forming ability is directly sprayed onto the skin.
  • a composition containing a volatile substance and a polymer having a film-forming ability is directly sprayed onto the skin.
  • the adhesion between the skin and the film formed by electrostatic spraying is enhanced, and the film formed on the skin is not easily damaged or peeled by friction with fingers or clothes.
  • the present invention includes (1) a liquid agent application step (hereinafter sometimes referred to as a liquid agent application step) in which a liquid agent containing a polymer is applied to the skin by a method other than electrostatic spraying; (2) A step of forming a film on the skin (hereinafter referred to as electrostatic) by electrostatically spraying the composition containing the component (a) and the component (b) (hereinafter also referred to as a spraying composition) directly onto the skin. (Also referred to as a spraying process) in this order or in the reverse order.
  • the liquid agent used in the liquid agent application step (1) is a liquid agent containing a polymer.
  • the polymer either a water-soluble polymer or a water-insoluble polymer can be used.
  • the water-soluble polymer at least one selected from nonionic polymers, anionic polymers, cationic polymers and amphoteric polymers can be used.
  • the “water-soluble polymer” means that 1 g of a polymer is weighed in an environment of 1 atm and 23 ° C. and then immersed in 10 g of ion-exchanged water. The thing which has the property which 5g or more melt
  • water-insoluble polymer means that 1 g of a polymer is weighed in an environment of 1 atm and 23 ° C. and then immersed in 10 g of ion-exchanged water. .5g or more refers to those that do not dissolve.
  • the nonionic polymer is not particularly limited, and any nonionic polymer that is usually used in the field of cosmetics can be used.
  • the solution may contain one or more nonionic polymers, and may further contain one or more anionic, cationic and / or amphoteric polymers in combination with the nonionic polymer. .
  • nonionic polymers include (meth) acrylic nonionic polymers, polyvinyl pyrrolidone, polyacrylamide, neutral polysaccharides and derivatives thereof (such as ethers and esters thereof).
  • Neutral sugars and derivatives thereof include neutral gums (guar gum, hydroxypropyl guar, etc.), cellulose ether (hydroxyethylcellulose (HEC), methylhydroxyethylcellulose (MHEC), ethylhydroxyethylcellulose (EHEC), methylethylhydroxyethylcellulose ( MEHEC), hydroxypropylcellulose (HPC), hydroxypropylmethylcellulose (HPMC), hydrophobized derivatives thereof (such as HM-EHEC)), starch and derivatives thereof (such as dextrin), and the like.
  • HEC hydroxyethylcellulose
  • MHEC methylhydroxyethylcellulose
  • EHEC ethylhydroxyethylcellulose
  • MEHEC methylethylhydroxye
  • Examples of the compound having an ethylenically unsaturated bond that can constitute a nonionic polymer such as the (meth) acrylic nonionic polymer, polyvinyl pyrrolidone, and polyacrylamide will be given below. There are no restrictions. Examples of nonionic monomers include methyl (meth) acrylate, ethyl (meth) acrylate, (n-propyl) (meth) acrylate, isopropyl (meth) acrylate, and n-butyl (meth) acrylate.
  • nonionic polymers a (meth) acrylic water-soluble nonionic polymer is preferable.
  • (meth) acrylic means “acrylic or methacrylic”.
  • the anionic polymer is not particularly limited, and any anionic polymer usually used in the cosmetics field can be used.
  • the liquid agent may contain one or more anionic polymers, and may further contain one or more nonionic, cationic and / or amphoteric polymers in combination with the anionic polymer.
  • anionic polymers include, for example, anionic polysaccharides and derivatives thereof (alginate, pectin, hyaluronate, etc.), anionic gums (xanthan gum, dehydroxanthan gum, hydroxypropyl xanthan gum, gum arabic, karaya gum, gum tragacanth, etc.), Anionic cellulose derivatives (carboxymethylcellulose (CMC) and the like), (meth) acrylic water-soluble anionic polymers and the like can be mentioned.
  • anionic polysaccharides and derivatives thereof alginate, pectin, hyaluronate, etc.
  • anionic gums xanthan gum, dehydroxanthan gum, hydroxypropyl xanthan gum, gum arabic, karaya gum, gum tragacanth, etc.
  • Anionic cellulose derivatives carboxymethylcellulose (CMC) and the like
  • (meth) acrylic water-soluble anionic polymers and the like can be mentioned.
  • Examples of the compound having an ethylenically unsaturated bond that can constitute an anionic polymer such as the (meth) acrylic anionic polymer are listed below, but the present invention is not limited to the following specific examples.
  • anionic monomers include unsaturated carboxylic acid compounds such as (meth) acrylic acid, maleic acid, maleic anhydride, itaconic acid, fumaric acid, and crotonic acid; unsaturated polybasic acid anhydrides (eg, succinic anhydride).
  • anionic unsaturated monomers can be used in the form of acid or partially neutralized or completely neutralized, or may be used in the state of acid copolymerization before partial neutralization or complete neutralization. it can.
  • the basic compound used for neutralization include alkali metal hydroxides such as potassium hydroxide and sodium hydroxide, and amine compounds such as ammonia water, mono-, di-, tri-ethanolamine and trimethylamine.
  • (meth) acrylic anionic polymers are particularly preferable.
  • Commercially available products include, for example, (alkyl acrylate / diacetone acrylamide) plus size L-53D (Kyoto Chemical Co., Ltd.), and (alkyl acrylate / octyl acrylamide) copolymer Dermacryl 79 (Akzo Nobel Co., Ltd.). ), Azo acrylate copolymer ammonium iodosol GH800F (Akzo Nobel Co., Ltd.), and (acrylate / C12-22 alkyl methacrylate) copolymer SOLTEX OPT (Dow Chemical Co., Ltd.).
  • an emulsifying thickener containing these nonionic polymers and anionic polymers can be used.
  • examples thereof include polyacrylamide / (C13, C14) isoparaffin / laureth-7 (Seppic 305, Sepigel 305).
  • the cationic polymer is not particularly limited, and any cationic thickening polymer usually used in the cosmetic field can be used.
  • the solution may contain one or more cationic polymers, and may further contain one or more nonionic, anionic and / or amphoteric polymers in combination with the cationic polymer.
  • the cationic polymer is a polymer having a cationic group such as a quaternary ammonium group or a group such as a primary, secondary, or tertiary amino group that can be ionized to a cationic group.
  • the cationic polymer is typically a polymer containing an amine group or an ammonium group in the side chain of a polymer chain or a polymer containing a diallyl quaternary ammonium salt as a structural unit.
  • Preferred cationic polymers include, for example, cationized cellulose, cationic starch, cationic guar gum, vinyl-based or (meth) acrylic polymers or copolymers having quaternary ammonium side chains, quaternized polyvinyl pyrrolidone, (meth) Examples include acrylate / aminoacrylate copolymers, amine-substituted poly (meth) acrylate crosspolymers, (meth) acrylic water-soluble cationic polymers, and the like.
  • Examples of the compound having an ethylenically unsaturated bond that can constitute a cationic polymer such as the (meth) acrylic cationic polymer are listed below, but the present invention is not limited to the following specific examples.
  • Examples of cationic monomers include N, N-dimethylaminoethyl (meth) acrylate, N, N-diethylaminoethyl (meth) acrylate, N, N-dimethylaminopropyl (meth) acrylate, N, N-diethylaminopropyl (Meth) acrylate, N, N-dimethylaminoethyl (meth) acrylamide, N, N-diethylaminoethyl (meth) acrylamide, N, N-dimethylaminopropyl (meth) acrylamide, N, N-diethylaminopropyl (meth) acrylamide P-dimethylaminomethyl styrene,
  • the cationized cellulose include a quaternary ammonium salt polymer (polyquaternium-10) obtained by adding glycidyltrimethylammonium chloride to hydroxyethylcellulose, a hydroxyethylcellulose / dimethyldiallylammonium chloride copolymer (polyquaternium-4), And a polymer of quaternary ammonium salt (polyquaternium-67) obtained by reacting hydroxyethyl cellulose with trimethylammonium substituted epoxide and lauryldimethylammonium substituted epoxide.
  • polyquaternium-10 quaternary ammonium salt polymer
  • polyquaternium-4 hydroxyethylcellulose / dimethyldiallylammonium chloride copolymer
  • polyquaternium-67 polymer of quaternary ammonium salt obtained by reacting hydroxyethyl cellulose with trimethylammonium substituted epoxide and lauryldimethylammonium
  • vinyl or (meth) acrylic polymers or copolymers having quaternary ammonium side chains examples include poly (2-methacryloxyethyltrimethylammonium chloride) (polyquaternium-37).
  • quaternized polyvinylpyrrolidone examples include quaternary ammonium salt (polyquaternium-11) synthesized from vinylpyrrolidone (VP) and a copolymer of dimethylaminoethyl methacrylate and diethyl sulfate.
  • Examples of (meth) acrylate / aminoacrylate copolymers include (acrylates / aminoacrylates / C10-30 alkyl PEG-20 itaconic acid) copolymers.
  • Examples of amine-substituted poly (meth) acrylate crosspolymers include polyacrylate-1 crosspolymer and polyquaternium-52.
  • (meth) acrylic cationic polymers are particularly preferable.
  • an alkyl acrylamide / acrylate / alkyl aminoalkyl acrylamide / polyethylene glycol methacrylate copolymer which can be synthesized according to the method described in Example 1 of JP-A-2-180911.
  • the amphoteric polymer is a polymer containing both a cationic group and an anionic group. From a structural point of view, the amphoteric polymer can be derived by further introducing an anionic group or comonomer into any of the aforementioned cationic polymers.
  • amphoteric polymer any amphoteric polymer usually used in the field of cosmetics can be used.
  • the liquid agent may contain one or more amphoteric polymers, and may further contain a nonionic, anionic and / or cationic polymer in combination with the amphoteric polymer.
  • amphoteric polymers include carboxyl-modified or sulfonic acid-modified cationic polysaccharides (such as carboxymethyl chitosan), (meth) acrylate polymers having a phosphobetaine group or sulfobetaine group in the side chain, and (meth) acrylic zwitterions For example.
  • amphoteric polymer such as the (meth) acrylic amphoteric polymer
  • the present invention is not limited in any way by the following specific examples. Absent.
  • Specific examples of the amphoteric monomer include compounds obtained by allowing a modifying agent such as sodium or potassium haloacetate to act on the specific examples of the cationic monomer precursor described above.
  • polarizable monomers include N, N-dimethylaminoethyl (meth) acrylate, N, N-diethylaminoethyl (meth) acrylate, N, N-dimethylaminopropyl (meth) acrylate, N, N N-diethylaminopropyl (meth) acrylate, N, N-dimethylaminoethyl (meth) acrylamide, N, N-diethylaminoethyl (meth) acrylamide, N, N-dimethylaminopropyl (meth) acrylamide, N, N-diethylaminopropyl And amine oxides such as (meth) acrylamide, vinyl N, N-dimethylaminopropionate, p-dimethylaminomethylstyrene, p-dimethylaminoethylstyrene, p-diethylaminomethylstyren
  • copolymers of cationic vinyl or (meth) acrylic monomers and (meth) acrylic acid such as dimethyldiallylammonium chloride / acrylic acid copolymer (polyquaternium-22)).
  • (meth) acrylic zwitterionic polymers are preferred.
  • Examples of commercially available products include Yuka Former (Mitsubishi Chemical Corporation), which is a (methacryloyloxyethylcarboxybetaine / alkyl methacrylate) copolymer, and Amphomer 28, which is an (octylacrylamide / hydroxypropyl acrylate / butylaminoethyl methacrylate) copolymer. -4910 (Akzo Nobel Co., Ltd.).
  • water-insoluble polymers examples include fully saponified polyvinyl alcohol that can be insolubilized after film formation, partially saponified polyvinyl alcohol that can be crosslinked after film formation when used in combination with a crosslinking agent, and poly (N-propanoylethyleneimine) graft-dimethylsiloxane.
  • Acrylic resins such as oxazoline-modified silicone such as ⁇ -aminopropylmethylsiloxane copolymer, polyvinyl acetal diethylaminoacetate, twein (main component of corn protein), polyester, polylactic acid (PLA), polyacrylonitrile resin, polymethacrylic acid resin , Polystyrene resin, polyvinyl butyral resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polyurethane resin, polyamide resin, polyimide resin, polyamide resin Imide resins. These water-insoluble polymers can be used alone or in combination of two or more.
  • water-insoluble polymers fully saponified polyvinyl alcohol that can be insolubilized after film formation, partially saponified polyvinyl alcohol that can be crosslinked after film formation by using in combination with a crosslinking agent, polyvinyl butyral resin, poly (N-propanoylethyleneimine) It is preferable to use an oxazoline-modified silicone such as a graft-dimethylsiloxane / ⁇ -aminopropylmethylsiloxane copolymer, a water-insoluble polyester, or twein.
  • oxazoline-modified silicone such as a graft-dimethylsiloxane / ⁇ -aminopropylmethylsiloxane copolymer, a water-insoluble polyester, or twein.
  • the liquid agent is a liquid composition at room temperature (0 to 35 ° C.), that is, a fluid composition.
  • the viscosity at 30 ° C. is preferably 500,000 mPa ⁇ s or less, It is more preferably 300,000 mPa ⁇ s or less, and even more preferably 100,000 mPa ⁇ s or less.
  • the viscosity of the liquid agent is measured with a BM viscometer (manufactured by Tokimec, measurement conditions: rotor No. 1, 60 rpm, 1 minute).
  • the content of the polymer in the liquid is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and further preferably 1% by mass or more from the viewpoint of adjusting the viscosity of the liquid and improving adhesion. preferable. Moreover, 15 mass% or less is preferable from the same viewpoint, 7.5 mass% or less is more preferable, and 5 mass% or less is further more preferable.
  • a polyol in the liquid agent, can be contained in addition to water and alcohol as a solvent and a polymer.
  • the polyol include alkylene glycols such as ethylene glycol, propylene glycol, 1,3-propanediol, and 1,3-butanediol; polyalkylene glycols such as diethylene glycol, dipropylene glycol, polyethylene glycol, and polypropylene glycol.
  • Glycerins such as glycerin, diglycerin, triglycerin, and the like.
  • ethylene glycol, propylene glycol, 1,3-butanediol, dipropylene glycol, polyethylene glycol, glycerin, and diglycerin are preferable from the viewpoint of feeling of use such as smoothness during coating, and propylene glycol, 1, 3-butanediol and glycerin are more preferable, and propylene glycol and 1,3-butanediol are more preferable.
  • a thin layer of the liquid can be formed by applying the liquid to the skin by a method such as dripping or sprinkling, and by applying the liquid to the skin or a film.
  • a method such as rubbing using a user's finger or a tool such as an applicator can be employed.
  • the liquid agent may be simply dropped or sprinkled, it can be applied to the skin and the film by providing a spreading step, and the adhesion of the film can be sufficiently improved.
  • the solution can be sprayed onto the skin to form a thin layer of the solution.
  • the amount of the liquid applied to the skin or the film may be an amount necessary and sufficient for improving the adhesion between the skin and the film.
  • the amount of the solution applied to the skin or the film is preferably 5 g / m 2 or more, more preferably 10 g / m 2 or more, and further preferably 15 g / m 2 from the viewpoint of improving the adhesion between the skin and the film.
  • m 2 or more preferably 50 g / m 2 or less, more preferably 45 g / m 2 or less.
  • the electrostatic spraying step (2) a composition containing predetermined components is directly applied to the skin to form a film.
  • an electrostatic spray method is employed as a method for forming a coating film.
  • the electrostatic spray method is a method in which a positive or negative high voltage is applied to a composition to charge the composition, and the charged composition is sprayed toward an object.
  • the sprayed composition spreads in space while being repeatedly refined by Coulomb repulsion, and in the process or after adhering to the object, the solvent, which is a volatile substance, is dried to form a film on the surface of the object.
  • the electrostatic spraying step (2) is preferably performed after the liquid agent application step (1) until the liquid agent is dried.
  • composition “spraying composition” used in the present invention is a liquid in an environment where an electrostatic spray method is performed.
  • This composition contains the following component (a) and component (b).
  • component (B) A polymer having a film-forming ability are included in the present invention.
  • the volatile substance of component (a) is a substance that is volatile in the liquid state.
  • the component (a) is discharged from the tip of the nozzle toward the skin after the spray composition placed in an electric field is sufficiently charged, and the component (a) evaporates.
  • the charge density of the spray composition becomes excessive, and the component (a) further evaporates while being further refined by Coulomb repulsion, and is finally blended for the purpose of forming a dry film.
  • the vapor pressure of the volatile substance 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 at 20 ° C. It is still more preferably 67 kPa or more and 40.00 kPa or less, and further preferably 1.33 kPa or more and 40.00 kPa or less.
  • a monovalent chain aliphatic alcohol for example, a monovalent chain aliphatic alcohol, a monovalent cyclic aliphatic alcohol, or a monovalent aromatic alcohol is preferably used.
  • the monovalent chain aliphatic alcohol is C 1 -C 6 alcohol
  • the monovalent cyclic aliphatic alcohol is C 4 -C 6 cyclic alcohol
  • the monovalent aromatic alcohol is benzyl alcohol, phenylethyl alcohol Is mentioned.
  • Specific examples thereof include ethanol, isopropyl alcohol, butyl alcohol, phenylethyl alcohol, propanol, pentanol and the like. These alcohols can use 1 type, or 2 or more types chosen from these.
  • ketone examples include di-C 1 -C 4 alkyl ketones such as acetone, methyl ethyl ketone, and methyl isobutyl ketone. These ketones can be used alone or in combination of two or more.
  • the volatile substance of component (a) is more preferably one or more selected from ethanol, isopropyl alcohol, butyl alcohol, and water, more preferably one or two selected from ethanol and butyl alcohol. More than species, and most preferably contains ethanol.
  • the composition for spraying contains a polymer having a film-forming ability as the component (b) together with the component (a).
  • the component (b), which has a film-forming ability is generally a substance that can be dissolved in the volatile substance of the component (a).
  • dissolution means that the dispersion is in a dispersed state at 20 ° C., and the dispersed state is a visually uniform state, preferably a visually transparent or translucent state.
  • polymers having a film-forming ability an appropriate polymer is used according to the nature of the volatile substance of component (a). Specifically, polymers having a film forming ability are roughly classified into water-soluble polymers and water-insoluble polymers.
  • water-soluble film-forming polymer examples include, for example, pullulan, hyaluronic acid, chondroitin sulfate, poly- ⁇ -glutamic acid, modified corn starch, ⁇ -glucan, glucooligosaccharide, heparin, keratosulfuric mucopolysaccharide, cellulose, pectin, etc.
  • Xylan lignin, glucomannan, galacturonic acid, psyllium seed gum, tamarind seed gum, gum arabic, tragacanth gum, soy water soluble polysaccharide, alginic acid, carrageenan, laminaran, agar (agarose), fucoidan, methylcellulose, hydroxypropylcellulose, hydroxypropyl Natural polymers such as methyl cellulose, partially saponified polyvinyl alcohol (when not used in combination with a crosslinking agent), low saponified polyvinyl alcohol, polyvinyl pyrrolidone (PVP), polyethylene oxide Id, and synthetic polymers such as sodium polyacrylate and the like.
  • PVP polyvinyl pyrrolidone
  • water-soluble polymers can be used alone or in combination of two or more.
  • polyethylene oxide is used as the water-soluble polymer, the number average molecular weight is preferably 50,000 or more and 3 million or less, and more preferably 100,000 or more and 2.5 million or less.
  • examples of the water-insoluble polymer having film-forming ability include, for example, fully saponified polyvinyl alcohol that can be insolubilized after film formation, partially saponified polyvinyl alcohol that can be crosslinked after film formation by using in combination with a crosslinking agent, and poly (N-propylene).
  • Noylethyleneimine graft-dimethylsiloxane / ⁇ -aminopropylmethylsiloxane copolymer and other oxazoline-modified silicones, polyvinyl acetal diethylaminoacetate, zein (a major component of corn protein), polyester, polylactic acid (PLA), polyacrylonitrile resin, Acrylic resin such as polymethacrylic acid resin, polystyrene resin, polyvinyl butyral resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polyurethane resin, polyamide resin , Polyimide resins, polyamide-imide resins. These water-insoluble polymers can be used alone or in combination of two or more.
  • water-insoluble polymers fully saponified polyvinyl alcohol that can be insolubilized after film formation, partially saponified polyvinyl alcohol that can be crosslinked after film formation by using in combination with a crosslinking agent, polyvinyl butyral resin, polyurethane resin, poly (N-propanoyl) Ethyleneimine) Graft-dimethylsiloxane / ⁇ -aminopropylmethylsiloxane copolymer and other oxazoline-modified silicones, polyvinyl acetal diethylaminoacetate, zein, etc. are preferably used, one or two selected from polyvinyl butyral resin and polyurethane resin More preferably, the above is used.
  • the content of the component (a) in the spray composition is preferably 50% by mass or more, more preferably 55% by mass or more, and further preferably 60% by mass or more. Moreover, it is preferable that it is 98 mass% or less, it is still more preferable that it is 96 mass% or less, and it is still more preferable that it is 94 mass% or less.
  • the content of the component (a) in the spray composition is preferably 50% by mass to 98% by mass, more preferably 55% by mass to 96% by mass, and 60% by mass to 94% by mass. More preferably, it is as follows. By blending the component (a) in the spray composition at this ratio, the spray composition can be sufficiently volatilized when the electrostatic spray method is performed.
  • ethanol is preferably 50% by mass or more, more preferably 65% by mass or more, and still more preferably 80% by mass or more based on the total amount of the volatile substance of component (a). Moreover, it is preferable that it is 100 mass% or less. 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 more preferably 80% by mass or more and 100% by mass or less with respect to the total amount of the volatile substance of component (a). More preferably, it is at most mass%.
  • the content of the component (b) in the spray composition is preferably 2% by mass or more, more preferably 4% by mass or more, and still more preferably 6% by mass or more. Further, it is preferably 50% by mass or less, more preferably 45% by mass or less, and further preferably 40% by mass or less.
  • the content of the component (b) in the spray composition is preferably 2% by mass or more and 50% by mass or less, more preferably 4% by mass or more and 45% by mass or less, and more preferably 6% by mass or more and 40% by mass. More preferably, it is as follows. By blending the component (b) in the spray composition at this ratio, the target film can be successfully formed.
  • the ratio ((a) / (b)) of the content of component (a) and component (b) in the spray composition is sufficient to volatilize component (a) when performing electrostatic spraying. From a viewpoint which can do, 0.5 or more and 40 or less are preferred, 1 or more and 30 or less are more preferred, and 2 or more and 25 or less are still more preferred. Moreover, the ratio ((a) / (b)) of the content of ethanol and component (b) in the spray composition can sufficiently volatilize component (a) when performing the electrostatic spray method. From a viewpoint, 0.5 or more and 40 or less are preferable, 1 or more and 30 or less are more preferable, and 2 or more and 25 or less are more preferable.
  • glycol can be contained in the spray composition.
  • examples of the glycol include ethylene glycol, propylene glycol, butylene glycol, diethylene glycol, dipropylene glycol, and polypropylene glycol. From the viewpoint of sufficiently volatilizing the component (a) when performing the electrostatic spraying method, it is preferably 10% by mass or less, more preferably 3% by mass or less, and preferably 1% by mass or less in the spray composition. It is preferable that it does not contain substantially.
  • the spray composition may contain only the component (a) and the component (b) described above, or may contain other components in addition to the component (a) and the component (b). Good.
  • Other components include, for example, a polymer plasticizer having a film-forming ability of component (b), a coloring pigment, an extender pigment, a dye, a surfactant, a UV protective agent, a fragrance, a repellent, an antioxidant, a stabilizer, Examples include preservatives and various vitamins.
  • the blending ratio of the other components is preferably 0.1% by mass or more and 30% by mass or less, and 0.5% by mass or more and 20% by mass or less. More preferably it is.
  • a spray composition having a viscosity of preferably 1 mPa ⁇ s or more, more preferably 10 mPa ⁇ s or more, more preferably 50 mPa ⁇ s or more at 25 ° C. is used.
  • a material having a viscosity at 25 ° C. of preferably 5000 mPa ⁇ s or less, more preferably 2000 mPa ⁇ s or less, and still more preferably 1500 mPa ⁇ s or less is used.
  • the viscosity of the spray composition is preferably 1 mPa ⁇ s or more and 5000 mPa ⁇ s or less, more preferably 10 mPa ⁇ s or more and 2000 mPa ⁇ s or less, more preferably 50 mPa ⁇ s or more and 1500 mPa ⁇ s or less at 25 ° C. It is.
  • a spray composition having a viscosity in this range a porous coating, particularly a porous coating composed of a fiber deposit, can be successfully formed by electrostatic spraying.
  • the formation of the porous film is advantageous from the viewpoint of preventing the skin from becoming stuffy.
  • the viscosity of the spray composition is measured at 25 ° C. using an E-type viscometer.
  • the E type viscometer for example, an E type viscometer manufactured by Tokyo Keiki Co., Ltd. can be used. In this case, the rotor No. 43 can be used.
  • FIG. 1 is a schematic diagram showing the configuration of an electrostatic spray apparatus that is preferably used in the present invention.
  • the electrostatic spray apparatus 10 shown in the figure includes a low voltage power supply 11.
  • the low voltage power supply 11 can generate a voltage of several volts to several tens of volts.
  • the low voltage power supply 11 is preferably composed of one or two or more batteries. Further, by using a battery as the low voltage power supply 11, there is an advantage that replacement can be easily performed as necessary. Instead of the battery, an AC adapter or the like can be used as the low voltage power supply 11.
  • the electrostatic spray device 10 also includes a high voltage power supply 12.
  • the high voltage power supply 12 is connected to the low voltage power supply 11 and includes an electric circuit (not shown) that boosts the voltage generated by the low voltage power supply 11 to a high voltage.
  • the step-up electric circuit is generally composed of a transformer, a capacitor, a semiconductor element, and the like.
  • the electrostatic spray device 10 further includes an auxiliary electric circuit 13.
  • the auxiliary electric circuit 13 is interposed between the low voltage power supply 11 and the high voltage power supply 12 described above, and has a function of adjusting the voltage of the low voltage power supply 11 and causing the high voltage power supply 12 to operate stably. Further, the auxiliary electric circuit 13 has a function of controlling the rotational speed of a motor provided in the micro gear pump 14 described later. By controlling the number of rotations of the motor, the amount of the spray composition supplied from the spray composition container 15 to be described later to the micro gear pump 14 is controlled.
  • a switch SW is attached between the auxiliary electric circuit 13 and the low voltage power source 11, and the electrostatic spray device 10 can be operated / stopped by turning on / off the switch SW.
  • the electrostatic spray device 10 further includes a nozzle 16.
  • the nozzle 16 is made of various conductors including metals and non-conductors such as plastic, rubber, and ceramic, and has a shape that allows the spray composition to be discharged from its tip.
  • a minute space through which the spraying composition flows is formed along the longitudinal direction of the nozzle 16.
  • the size of the cross section of the minute space is preferably 100 ⁇ m or more and 1000 ⁇ m or less in terms of diameter.
  • the nozzle 16 communicates with the micro gear pump 14 through a pipe line 17.
  • the conduit 17 may be a conductor or a non-conductor.
  • the nozzle 16 is electrically connected to the high voltage power supply 12. As a result, a high voltage can be applied to the nozzle 16.
  • the nozzle 16 and the high voltage power supply 12 are electrically connected via the current limiting resistor 19 in order to prevent an excessive current from flowing when the human body directly touches the nozzle 16.
  • the micro gear pump 14 that communicates with the nozzle 16 via the pipe line 17 functions as a supply device that supplies the spray composition contained in the container 15 to the nozzle 16.
  • the micro gear pump 14 operates by receiving power from the low voltage power source 11. Further, the micro gear pump 14 is configured to supply a predetermined amount of the spray composition to the nozzle 16 under the control of the auxiliary electric circuit 13.
  • the container 15 is connected to the micro gear pump 14 through a flexible pipe 18.
  • the container 15 contains a spraying composition.
  • the container 15 is preferably in a cartridge-type replaceable form.
  • FIG. 2 shows a handy type electrostatic spray apparatus 10 having a size that can be held with one hand.
  • the electrostatic spray device 10 shown in the figure all members in the configuration diagram shown in FIG. 1 are accommodated in a cylindrical housing 20.
  • a nozzle (not shown) is disposed at one end 10 a in the longitudinal direction of the housing 20.
  • the nozzle is arranged in the casing 20 so that the blowing direction of the composition coincides with the vertical direction of the casing 20 and becomes convex toward the skin side.
  • FIG. 2 shows a state where one end 10a of the electrostatic spray device 10 is directed to the inner side of the user's forearm. Under this state, the apparatus 10 is turned on to perform the electrostatic spray method. When the apparatus 10 is turned on, an electric field is generated between the nozzle and the skin. In the embodiment shown in FIG. 2, a positive high voltage is applied to the nozzle and the skin becomes the negative electrode.
  • the spray composition at the tip of the nozzle is polarized by electrostatic induction so that the tip becomes a cone shape, and droplets of the spray composition charged from the tip of the cone are charged. Are discharged into the air along the electric field toward the skin.
  • component (a) which is a solvent, evaporates from the spray composition charged and discharged into space, the charge density on the surface of the spray composition becomes excessive and spreads into the space while repeating miniaturization by Coulomb repulsion. Reach the skin.
  • the viscosity of the spray composition the sprayed composition can reach the skin in the form of droplets.
  • a volatile substance as a solvent is volatilized from the composition, a polymer having a film-forming ability as a solute is solidified, and a fiber is formed while being elongated and deformed by a potential difference
  • the fibers can also be deposited on the surface of the skin. For example, increasing the viscosity of the spray composition tends to deposit the composition on the surface of the skin in the form of fibers. As a result, a porous coating made of a fiber deposit is formed on the surface of the skin.
  • a porous coating made of a fiber deposit can also be formed by adjusting the distance between the nozzle and the skin and the voltage applied to the nozzle.
  • the electrostatic spray method a high potential difference is generated between the nozzle and the skin.
  • the impedance is very large, the current flowing through the human body is extremely small.
  • the present inventor has confirmed that the current flowing through the human body during the electrostatic spray method is several orders of magnitude smaller than the current flowing through the human body due to static electricity generated in normal life.
  • the thickness of the fiber is preferably 10 nm or more, and more preferably 50 nm or more, when expressed in terms of a circle equivalent diameter. Moreover, it is preferable that it is 3000 nm or less, and it is still more preferable that it is 1000 nm or less.
  • the thickness of the fiber is observed by, for example, scanning electron microscope (SEM) observation by magnifying the fiber 10,000 times, and removing defects (fiber clumps, fiber intersections, droplets) from the two-dimensional image, It can be measured by selecting 10 fibers arbitrarily, drawing a line perpendicular to the longitudinal direction of the fiber, and directly reading the fiber diameter.
  • SEM scanning electron microscope
  • the above-mentioned fibers are continuous fibers having an infinite length on the principle of production, but preferably have a length at least 100 times the thickness of the fiber.
  • a fiber having a length of 100 times or more the thickness of the fiber is defined as “continuous fiber”.
  • the film manufactured by the electrostatic spray method is a porous discontinuous film made of a continuous fiber deposit.
  • the coating in such a form has very soft characteristics, and even when shearing force is applied to it, it does not easily break apart, and can follow the movement of the body. There is an advantage of being excellent.
  • the coating can be easily peeled off.
  • the continuous film having no pores is not easily peeled off and has very low sweat diffusibility, so that the skin is easily stuffy.
  • the spray composition in a fibrous form reaches the skin in a charged state.
  • the fibers adhere to the skin by electrostatic force. Since fine irregularities such as texture are formed on the surface of the skin, the fibers are more closely adhered to the surface of the skin in combination with the anchor effect due to the irregularities.
  • electrostatic spraying is completed in this way, the electrostatic sprayer 10 is turned off. As a result, the electric field between the nozzle and the skin disappears, and the electric charge is fixed on the surface of the skin. As a result, the adhesion of the film is further developed.
  • porous coating made of a fiber deposit as a coating is not limited to this, and a continuous coating without pores may be formed.
  • a porous film having a form other than the deposit for example, a porous film in which a plurality of through holes are irregularly or regularly formed in a continuous film, that is, a discontinuous film may be formed.
  • a film having an arbitrary shape can be formed by controlling the viscosity of the spray composition, the distance between the nozzle and the skin, the voltage applied to the nozzle, and the like.
  • the distance between the nozzle and the skin depends on the voltage applied to the nozzle, but is preferably 50 mm or more and 150 mm or less in order to successfully form the coating.
  • the distance between the nozzle and the skin can be measured by a generally used non-contact sensor or the like.
  • the basis weight of the coating is preferably 0.1 g / m 2 or more, and preferably 1 g / m 2 or more. Is more preferable. Moreover, it is preferable that it is 30 g / m ⁇ 2 > or less, and it is still more preferable that it is 20 g / m ⁇ 2 > or less.
  • the basis weight of the coating is preferably 0.1 g / m 2 or more 30 g / m 2 or less, further preferably 1 g / m 2 or more 20 g / m 2 or less.
  • the electrostatic spraying process in which the composition is directly sprayed onto the skin to form a film is a film formed by electrostatic spraying on the skin or the skin to which the above-mentioned liquid agent has been applied (also simply referred to as skin). It means the process to do.
  • the step of electrostatically spraying the composition to a place other than the skin to produce a sheet made of fibers and applying the sheet to the skin is different from the electrostatic spraying step.
  • the liquid agent is applied to the skin by a method other than electrostatic spraying before, after, or before or after the electrostatic spraying step of forming the film by electrostatic spraying.
  • a liquid agent application process is performed.
  • the liquid agent before the electrostatic spraying process, it becomes easier to adhere more strongly due to the adhesiveness of the polymer.
  • the film formed in the electrostatic spraying process is easily adapted to the skin with the liquid drug, and the film is applied to the skin. High adhesion. A step is less likely to occur between the end portion of the coating and the skin, thereby improving the adhesion between the coating and the skin.
  • the coating is a porous coating made of a fiber deposit, it has high adhesion to the skin despite a high porosity, and a large capillary force tends to be generated. Furthermore, when the fibers are fine, it is easy to increase the specific surface area of the porous coating.
  • a polymer-containing solution-supporting film in which the polymer-containing solution is present is formed. This improves the adhesion of the coating.
  • the film is colorless and transparent or translucent, it becomes more difficult to visually recognize the film, so that it can look like natural skin.
  • the coating is colored and opaque, the coating is transparent, so that it can look like a part of the skin. The colored includes white.
  • the coating production method as described above is useful as various beauty methods not intended for human surgery, treatment or diagnostic methods.
  • the method for producing a coating of the present invention is used for cosmetic purposes, whitening the skin, hiding skin spots, hiding skin dullness / bearing, hiding skin wrinkles, blurring skin, protecting skin from UV rays, skin Can be applied for moisturizing.
  • various kinds of actions for protecting the skin personally at home for example, protection of various wounds such as abrasions, cuts, lacerations and stab wounds, prevention of pressure sores, etc.
  • the method can also be applied.
  • this invention was demonstrated based on the preferable embodiment, this invention is not restrict
  • a person who wants to form a film on his / her skin grips the electrostatic spray device 10 and generates an electric field between the nozzle of the device 10 and his / her skin. As long as an electric field is generated, it is not necessary for a person who wants to form a film on his skin to hold the electrostatic spray device 10.
  • the present invention further discloses the following method for producing a coating film.
  • a liquid agent application step in which a liquid agent containing a polymer is applied to the skin by a method other than electrostatic spraying, and electrostatic in which a composition containing component (a) and component (b) is directly electrostatically sprayed on the skin to form a film.
  • a method for producing a film on the skin comprising spraying steps in this order or in the reverse order.
  • B) A polymer having a film-forming ability A polymer having a film-forming ability.
  • ⁇ 2> The method for producing a coating according to ⁇ 1>, wherein in the electrostatic spraying step, the composition is electrostatically sprayed on the skin to form a porous coating.
  • a porous coating composed of fiber deposits is formed, and then in the liquid agent application step, the liquid agent is applied onto the porous coating.
  • the composition is electrostatically sprayed onto the skin using an electrostatic spraying device to form a porous film made of a fiber deposit
  • the electrostatic spraying device comprises: A container containing the composition; A nozzle for discharging the composition; A supply device for supplying the nozzle with the composition contained in the container; A power supply for applying a voltage to the nozzle; ⁇ 1> thru
  • the vapor pressure of the volatile substance (a) is preferably 0.01 kPa or more and 106.66 kPa or less at 20 ° C., more preferably 0.13 kPa or more and 66.66 kPa or less, and 0.67 kPa or more.
  • the volatile substance of (a) is an alcohol, and a monovalent chain aliphatic alcohol, a monovalent cycloaliphatic alcohol, and a monovalent aromatic alcohol are preferably used as the alcohol.
  • One type can be used alone, or two or more types can be used in combination.
  • the volatile substance (a) is one or more selected from ethanol, isopropyl alcohol, butyl alcohol, and water, more preferably one or two selected from ethanol and butyl alcohol, More preferably, the method for producing a coating film according to any one of ⁇ 1> to ⁇ 6>, wherein the coating film contains ethanol.
  • the polymer having the ability to form a film of (b) is a substance that can be dissolved in the volatile substance of (a), and includes a water-soluble polymer and a water-insoluble polymer.
  • the water-soluble film-forming polymer include pullulan, hyaluronic acid, chondroitin sulfate, poly- ⁇ -glutamic acid, modified corn starch, ⁇ -glucan, glucooligosaccharide, heparin, keratosulfuric mucopolysaccharide, cellulose, pectin, Xylan, lignin, glucomannan, galacturonic acid, psyllium seed gum, tamarind seed gum, gum arabic, tragacanth gum, soybean water-soluble polysaccharide, alginic acid, carrageenan, laminaran, agar (agarose), fucoidan, methylcellulose, hydroxypropylcellulose, hydroxyprop
  • water-insoluble polymers having film-forming ability examples include fully saponified polyvinyl alcohol that can be insolubilized after film formation, partially saponified polyvinyl alcohol that can be crosslinked after film formation by using in combination with a crosslinking agent, and poly (N-propanoylethyleneimine).
  • Oxazoline-modified silicone such as graft-dimethylsiloxane / ⁇ -aminopropylmethylsiloxane copolymer, polyvinyl acetal diethylaminoacetate, zein (main component of corn protein), polyester, polylactic acid (PLA), polyacrylonitrile resin, polymethacrylic acid Acrylic resin such as resin, polystyrene resin, polyvinyl butyral resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polyurethane resin, polyamide resin, polyimide 1 or 2 or more water-insoluble polymers selected from fats and polyamide-imide resins, more preferably fully saponified polyvinyl alcohol that can be insolubilized after film formation, and partial saponification that can be crosslinked after film formation by using in combination with a crosslinking agent 1 selected from polyvinyl alcohol, polyvinyl butyral resin, polyurethane resin, oxazoline-modified silicone such
  • the component (a) is a volatile substance containing at least ethanol
  • the component (b) is one or more selected from polyvinyl butyral resins and polyurethane resins.
  • a method for producing a coating ⁇ 12>
  • the content of the component (a) in the composition is preferably 50% by mass or more, more preferably 55% by mass or more, still more preferably 60% by mass or more, and 98% by mass or less. It is preferable that it is 96 mass% or less, and it is still more preferable that it is 94 mass% or less, and content of the component (a) in the said composition is 50 mass% or more and 98 mass% or less.
  • the content of the component (b) in the composition is preferably 2% by mass or more, more preferably 4% by mass or more, further preferably 6% by mass or more, and 50% by mass or less. It is preferably 45% by mass or less, more preferably 40% by mass or less, and the content of the component (b) in the composition is 2% by mass or more and 50% by mass or less.
  • the composition has a viscosity at 25 ° C. of preferably 1 mPa ⁇ s or more, more preferably 10 mPa ⁇ s or more, still more preferably 50 mPa ⁇ s or more, preferably 5000 mPa ⁇ s or less, more preferably 2000 mPa ⁇ s. s or less, more preferably 1500 mPa ⁇ s or less, and the viscosity of the composition at 25 ° C. is preferably 1 mPa ⁇ s or more and 5000 mPa ⁇ s or less, and more preferably 10 mPa ⁇ s or more and 2000 mPa ⁇ s or less. More preferably, the method for producing a coating film according to any one of the above items ⁇ 1> to ⁇ 15>, which is 50 mPa ⁇ s or more and 1500 mPa ⁇ s or less.
  • the electrostatic spray device includes a nozzle,
  • the nozzle is made of various conductors including metal, or non-conductor such as plastic, rubber, ceramic, etc., and has a shape capable of discharging the composition from the tip thereof ⁇ 1> to ⁇ The manufacturing method of the film of any one of 16>.
  • the electrostatic spray device includes a nozzle and a housing, The nozzle is arranged at one end in the longitudinal direction of the housing, Any one of the items ⁇ 1> to ⁇ 17>, wherein the nozzle is disposed in the casing such that the blowing direction of the composition is aligned with the longitudinal direction of the casing and becomes convex toward the skin side.
  • the sprayed composition forms a fiber) while volatilizing a volatile substance as a solvent from droplets and solidifying a polymer having a film-forming ability as a solute while elongating and deforming by a potential difference) ⁇ 1> Thru
  • Perform electrostatic spraying using an electrostatic spraying device The electrostatic spray device includes a nozzle, The method for producing a coating film according to any one of ⁇ 1> to ⁇ 19>, wherein the distance between the nozzle and the skin is 50 mm or more and 150 mm or less.
  • the basis weight of the film formed by the electrostatic spray method is preferably 0.1 g / m 2 or more, more preferably 1 g / m 2 or more, and preferably 30 g / m 2 or less. More preferably, it is 20 g / m 2 or less, and the basis weight of the coating is preferably 0.1 g / m 2 or more and 30 g / m 2 or less, and preferably 1 g / m 2 or more and 20 g / m 2 or less. More preferably, the method for producing a coating film according to any one of ⁇ 1> to ⁇ 20>.
  • ⁇ 22> Any one of ⁇ 1> to ⁇ 21>, wherein the polymer contained in the solution is at least one water-soluble polymer selected from a nonionic polymer, an anionic polymer, a cationic polymer, and an amphoteric polymer, or a water-insoluble polymer.
  • the method for producing a coating according to 1. ⁇ 23> The coating according to ⁇ 22>, wherein the nonionic polymer is at least one selected from (meth) acrylic water-soluble nonionic polymers, polyvinylpyrrolidone, polyacrylamide, neutral sugars and derivatives thereof (such as ethers and esters). Manufacturing method.
  • Anionic polymers include anionic polysaccharides and derivatives thereof (alginate, pectin, hyaluronate, etc.), anionic gums (xanthan gum, dehydroxanthan gum, hydroxypropyl xanthan gum, gum arabic, karaya gum, tragacanth gum, etc.), anionic cellulose derivatives ( The manufacturing method of the film as described in ⁇ 22> which is 1 or more types chosen from a carboxymethylcellulose (CMC) etc.) and a (meth) acrylic water-soluble anionic polymer.
  • CMC carboxymethylcellulose
  • the cationic polymer is a polymer having a cationic group such as a quaternary ammonium group, or a group such as a primary, secondary or tertiary amino group that can be ionized to a cationic group, preferably ⁇ 22>
  • the method for producing a coating according to ⁇ 22> which is a polymer containing an amine group or an ammonium group in a side chain of a polymer chain or a polymer containing diallyl quaternary ammonium salt as a structural unit.
  • Amphoteric polymers are carboxyl-modified or sulfonic acid-modified cationic polysaccharides (carboxymethyl chitosan, etc.), (meth) acrylate polymers having phosphobetaine groups or sulfobetaine groups in the side chain, and (meth) acrylic zwitterionic polymers
  • the method for producing a film according to ⁇ 22> which is one or more selected from the group consisting of: ⁇ 27>
  • the viscosity of the liquid agent at 30 ° C. is preferably 5000 mPa ⁇ s or less, more preferably 3000 mPa ⁇ s or less, and even more preferably 1000 mPa ⁇ s or less.
  • the content of the polymer in the liquid preparation is preferably 0.5% by mass or more, more preferably 2% by mass or more, and further preferably 4% by mass or more. Moreover, 20 mass% or less is preferable, 15 mass% or less is more preferable, and 7 mass% or less is more preferable.
  • the amount of the liquid applied to the skin or the coating by a method other than electrostatic spraying is preferably 5 g / m 2 , more preferably 10 g / m 2 or more, and further preferably 15 g / m 2 or more.
  • the content of component (a) is 30% by mass to 98% by mass in the composition, and the content of component (b) is 2% by mass to 50% by mass in the spray composition ⁇ 1> to ⁇ 29>
  • the content of component (a) is 55 to 96% by mass in the composition, and the content of component (b) is 4 to 45% by mass in the spray composition ⁇ 1> to ⁇ 30>
  • component (a) is 60% by mass or more and 94% by mass or less in the composition, and the content of component (b) is 6% by mass or more and 40% by mass or less in the spray composition ⁇ 1> to ⁇ 31>
  • ⁇ 33> Any one of ⁇ 1> to ⁇ 32>, wherein the component (a) is a volatile substance containing at least ethanol, and the component (b) is one or more selected from polyvinyl butyral resins and polyurethane resins.
  • Example 1 (1) Preparation of spraying composition A 99.5% ethanol (manufactured by Wako Pure Chemical Industries, Ltd.) was used as component (a) of the spraying composition.
  • component (b) polyvinyl butyral (manufactured by Sekisui Chemical Co., Ltd .: trade name ESREC B) was used.
  • measure component (a), component (b), and additive Eldeu PS-203 manufactured by Ajinomoto Healthy Supply Co., Ltd.
  • Component (a), component (b), and additive were 80 parts by weight, 14 parts by weight, and 6.0 parts by weight, respectively.
  • (2) Preparation of liquid agent used in liquid agent application step As a liquid agent, 55 mg of polymer solutions AK were used. The compositions of polymer solutions A to K are shown in Table 2 below.
  • (3) Solution application step The polymer solution was dropped on the inner side of the human forearm, spread with a finger on an area having a diameter of 4 cm to less than 6 cm, and blended to form a thin layer. The amount of dripping was 55 mg, and the amount was applied so that the presence of the solution A could be understood visually or by touch because the spread area was wet or moist or the texture was different. .
  • the amount of solution A applied to the skin was such that the basis weight of solution A was 28.0 g / m 2 .
  • Electrostatic spraying process Using the electrostatic spraying apparatus 10 having the configuration shown in FIG. 1 and having the appearance shown in FIG. 2, electrostatic spraying toward the thin layer formed in the liquid agent application process of (3). The method was run for 20 seconds. The conditions of the electrostatic spray method were as shown below. ⁇ Applied voltage: 10 kV ⁇ Distance between nozzle and skin: 100mm ⁇ Discharge rate of spray composition: 5 mL / h ⁇ Environment: 25 °C, 30% RH By this electrostatic spraying, a porous coating made of a fiber deposit was formed on the surface of the skin. The coating was a circle with a diameter of about 4 cm and the mass was about 5.5 mg. The fiber thickness measured by the method described above was 0.5 ⁇ m.
  • Example 2 In Example 1, the order of the liquid agent application process and the electrostatic spray process is reversed. Except this, it carried out similarly to Example 1, and obtained the porous film which consists of a deposit of a fiber.
  • Examples 3 to 14 Except for the conditions shown in Tables 1 to 4 below, the liquid agent application step and the electrostatic spraying step were performed in this order in the same manner as in Example 1 to obtain a porous film made of fiber deposits. .
  • Comparative Example 1 This comparative example is an example in which the liquid agent application step was not performed in Example 1. Except this, it carried out similarly to Example 1, and obtained the porous film which consists of a deposit of a fiber.
  • Example 2 (1) Preparation of spraying composition A spraying composition A was prepared in the same manner as in Example 1. (2) Production of Sheet by Electrostatic Spray Process Using the electrostatic spray apparatus 10 having the configuration shown in FIG. 1 and the appearance shown in FIG. 2, the electrostatic spray method was performed for 20 seconds toward the stainless steel plate. The conditions of the electrostatic spray method were as shown below. ⁇ Applied voltage: 10 kV ⁇ Distance between nozzle and skin: 100mm ⁇ Discharge rate of spray composition: 5 mL / h ⁇ Environment: 25 °C, 30% RH By this electrostatic spraying, a porous coating made of a fiber deposit was formed on the surface of the stainless steel plate.
  • the coating was a circle with a diameter of about 4 cm and the mass was about 5.5 mg.
  • the fiber thickness measured by the method described above was 0.5 ⁇ m.
  • (3) Solution application step The polymer solution A was dropped on the inner side of the human forearm and spread with a finger on an area having a diameter of 4 cm or more and less than 6 cm to form a thin layer. The amount of dripping was 55 mg, and the amount was applied so that the presence of the solution A could be understood visually or by touch because the spread area was wet or moist or the texture was different. . As a result, the basis weight of the solution A is 28.0 g / m 2 when the solution A is applied to the skin.
  • (4) Sheet application step The sheet obtained in the electrostatic spraying step (2) was gently put on the thin layer formed in the liquid agent application step obtained in step (4) and gently pressed.
  • Comparative Example 3 In Comparative Example 2, the order of the liquid agent application step and the sheet sticking step is reversed. Except this, it carried out similarly to the comparative example 2, and obtained the porous film which consists of a deposit of a fiber.
  • Alkyl acrylate / octylacrylamide copolymer Dermacryl 79 (Akzo Nobel Co., Ltd.) Acrylates copolymer ammonium: Yodosol GH800F (Akzo Nobel Co., Ltd.) (Alkyl acrylate / diacetone acrylamide) copolymer AMPD: Plus size L-53D (Keikyo Chemical Co., Ltd.) (Octylacrylamide / Hydroxypropyl acrylate / Butylaminoethyl methacrylate) Copolymer: Amphomer 28-4910 (Akzo Nobel Co., Ltd.) 2-Amino-2-methyl-1-propanol: AMP Ultra PC 1000 (ANGUS Chemical company) (Acrylamide / DMAPA acrylic acid / methoxymethacrylate PEG) copolymer: synthesized according to the method described in Example 1 of JP-A-2-180911.
  • Polysilicone-9 synthesized according to the method described in Example 1 of JP-A-2-276824.
  • Ethanol 99.5% ethanol reagent special grade (Wako Pure Chemical Industries, Ltd.)
  • Comparative Examples 2 and 3 are examples in which a film was previously prepared at a place other than the skin by electrostatic spraying and applied to the skin.
  • the coating formed by the method of each example has higher adhesion to the skin than the coating formed by the method of the comparative example.
  • the film formed by the method of the comparative example has a fiber color (white) visually recognized, whereas the film formed by the method of the example is transparent. Sex was recognized.

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Abstract

La présente invention se rapporte à l'amélioration technologique dans un procédé de pulvérisation électrostatique pour la peau, et plus particulièrement, à une augmentation de l'adhérence d'un film de revêtement formé sur la peau par pulvérisation électrostatique. L'invention concerne un procédé de production d'un film de revêtement sur la peau, le procédé étant caractérisé en ce qu'il comprend, dans l'ordre suivant ou l'ordre inverse : une étape d'application d'agent liquide pour appliquer un agent liquide contenant un polymère sur la peau par un procédé autre que la pulvérisation électrostatique; et une étape de pulvérisation électrostatique d'une composition contenant le composant (a) et le composant (b) sur la peau directement pour former un film de revêtement sur la peau. Le composant (a) est une substance volatile d'au moins un élément choisi dans le groupe constitué par l'eau, l'alcool et la cétone; et le composant (b) est un polymère ayant une aptitude à former un film de revêtement.
PCT/JP2018/015982 2017-04-18 2018-04-18 Procédé de production d'un film de revêtement WO2018194088A1 (fr)

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