WO2023188754A1 - 化粧品パック用ゲルシート - Google Patents
化粧品パック用ゲルシート Download PDFInfo
- Publication number
- WO2023188754A1 WO2023188754A1 PCT/JP2023/002379 JP2023002379W WO2023188754A1 WO 2023188754 A1 WO2023188754 A1 WO 2023188754A1 JP 2023002379 W JP2023002379 W JP 2023002379W WO 2023188754 A1 WO2023188754 A1 WO 2023188754A1
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- WIPO (PCT)
- Prior art keywords
- gel sheet
- hlb value
- gel
- nonionic surfactant
- oil
- Prior art date
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- 235000010355 mannitol Nutrition 0.000 description 1
- 229960001855 mannitol Drugs 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- HEBKCHPVOIAQTA-UHFFFAOYSA-N meso ribitol Natural products OCC(O)C(O)C(O)CO HEBKCHPVOIAQTA-UHFFFAOYSA-N 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000010466 nut oil Substances 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- 235000014593 oils and fats Nutrition 0.000 description 1
- 239000004006 olive oil Substances 0.000 description 1
- 235000008390 olive oil Nutrition 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 235000019271 petrolatum Nutrition 0.000 description 1
- 229940066842 petrolatum Drugs 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000223 polyglycerol Polymers 0.000 description 1
- 229940097941 polyglyceryl-10 laurate Drugs 0.000 description 1
- 229940061570 polyglyceryl-10 stearate Drugs 0.000 description 1
- 229940062000 polyglyceryl-2 triisostearate Drugs 0.000 description 1
- 229940100518 polyglyceryl-4 isostearate Drugs 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229940050271 potassium alum Drugs 0.000 description 1
- GRLPQNLYRHEGIJ-UHFFFAOYSA-J potassium aluminium sulfate Chemical compound [Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRLPQNLYRHEGIJ-UHFFFAOYSA-J 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- HFHDHCJBZVLPGP-UHFFFAOYSA-N schardinger α-dextrin Chemical compound O1C(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(O)C2O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC2C(O)C(O)C1OC2CO HFHDHCJBZVLPGP-UHFFFAOYSA-N 0.000 description 1
- 239000003352 sequestering agent Substances 0.000 description 1
- 229940057910 shea butter Drugs 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 229940032147 starch Drugs 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 239000000230 xanthan gum Substances 0.000 description 1
- 229920001285 xanthan gum Polymers 0.000 description 1
- 235000010493 xanthan gum Nutrition 0.000 description 1
- 229940082509 xanthan gum Drugs 0.000 description 1
- 239000000811 xylitol Substances 0.000 description 1
- 235000010447 xylitol Nutrition 0.000 description 1
- HEBKCHPVOIAQTA-SCDXWVJYSA-N xylitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)CO HEBKCHPVOIAQTA-SCDXWVJYSA-N 0.000 description 1
- 229960002675 xylitol Drugs 0.000 description 1
Images
Classifications
-
- 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
- A61K8/31—Hydrocarbons
-
- 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
- A61K8/39—Derivatives containing from 2 to 10 oxyalkylene groups
-
- 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
- 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
- A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
- A61K8/86—Polyethers
-
- 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
- A61K8/92—Oils, fats or waxes; Derivatives thereof, e.g. hydrogenation products thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q19/00—Preparations for care of the skin
Definitions
- the present invention relates to a gel sheet for cosmetic packs.
- Hydrogel compositions containing water are known as external preparations that are applied to the skin.
- Patent Document 1 discloses an external patch comprising a sheet-like support and a gel base laminated on one side of the support, and used by applying the gel base to the skin surface after heating.
- the gel base of the external patch is an oil droplet-containing gel containing an oily component with a melting point of 35 to 47°C and a surfactant for dispersing the oil component in the form of oil droplets in the hydrogel.
- an external patch characterized by the following.
- Patent Document 2 discloses 1 to 25% by mass of a water-retaining oil, 0.4 to 6% by mass of phospholipid, 0.1 to 10% by mass of acrylic acid polymer, and 0.1 to 10% of water-soluble polysaccharide capable of forming a gel. % by mass, and a gel composition for application to the skin containing water.
- the external patch of Patent Document 1 is for applying effective heat, and contains an oil component with a melting point of 35 to 47°C, thereby making the heat application sustainable.
- the oil component in the form of oil droplets does not seep out from the gel base.
- the hydrating oil agent of Patent Document 2 is transferred from the gel composition for skin patching to the skin by applying the gel composition for skin patching to the skin, and as a result, the moisturizing effect of the hydrating oil agent on the skin is exerted.
- a water-soluble polysaccharide is used in the gel skeleton of Patent Document 2, and the oil agent is a water-retaining oil agent.
- phospholipids are used as emulsifiers for mixing water-retaining oil and water.
- the size of the oil droplets of the oil on the surface of the gel is not described.
- An object of the present invention is to provide a gel sheet for a cosmetic pack that has a small oil droplet size on the surface of the gel sheet and has an excellent long-lasting moisturizing effect on the skin, and a method for manufacturing the same.
- Item 1 A gel sheet for cosmetic packs containing a synthetic polymer having a network structure, an oil agent, an exuding agent, a wetting agent, and water, characterized in that the average diameter of the oil agent on the surface of the gel sheet is 5 ⁇ m or less.
- Item 2. The gel sheet for cosmetic packs according to item 1, wherein the oil agent contains one or more selected from the group consisting of hydrocarbons, waxes, and fats and oils.
- Item 3. Item 3.
- the gel sheet for cosmetic packs according to item 1 or 2 wherein the gel sheet for cosmetic packs contains 0.1 to 20% by mass of the exudant.
- Item 5 Any one of items 1 to 4, wherein the synthetic polymer having a network structure is a crosslinked product of a polymer of a polymerizable unsaturated monomer having an anionic functional group or a salt of such a polymer and a crosslinking agent.
- a method for producing a gel sheet for cosmetic packs comprising: A step of preparing an emulsion by mixing an oil containing a nonionic surfactant with an HLB value of 6 or less and water containing a nonionic surfactant with an HLB value of 10 or more, and an anionic functional group.
- a polymer of a polymerizable unsaturated monomer or a salt of these polymers, a leaching agent, a wetting agent, a crosslinking agent, water, and the emulsion are mixed to form a gel-like composition having a network structure.
- a method for manufacturing a gel sheet for cosmetic packs including a process.
- a gel sheet for a cosmetic pack that has a small oil droplet size on the surface of the gel sheet and has an excellent long-lasting moisturizing effect, and a method for manufacturing the same.
- FIG. 1 is a plan view of a gel sheet for a cosmetic pack according to an embodiment of the present invention. It is a top view of the gel sheet for cosmetic packs of another embodiment of this invention. It is a top view of the gel sheet for cosmetic packs of another embodiment of this invention. It is a top view of the gel sheet for cosmetic packs of another embodiment of this invention. Graph showing the relationship between HLB values of surfactants used in Examples and Comparative Examples and stability of emulsions.
- a gel sheet for a cosmetic pack containing a synthetic polymer having a network structure, an oil agent, an exuding agent, a wetting agent, and water, characterized in that the average diameter of the oil agent on the surface of the gel sheet is 5 ⁇ m or less.
- a gel sheet for a cosmetic pack is provided.
- the synthetic polymer having a network structure is not particularly limited as long as it contains at least water and can form a gel.
- synthetic polymers acceptable in the field can be used.
- synthetic polymers with an affinity for water are used.
- a synthetic polymer having a network structure is a crosslinked product of a polymer of a polymerizable unsaturated monomer having an anionic functional group or a salt thereof, and a crosslinking agent.
- polymers of polymerizable unsaturated monomers having anionic functional groups and salts thereof include polyacrylic acid, which is a polymer of acrylic acid having a carboxyl group as a functional group, or methacrylic acid having a carboxyl group as a functional group.
- Polymethacrylic acid which is a polymer of acid, and its respective sodium salt, potassium salt, and triethanolamine salt;
- Polymer of t-butylacrylamide sulfonic acid having a sulfonic acid group as a functional group, and its sodium salt, potassium salt Examples include salt; etc.
- sodium polyacrylate is used as a polymer of a polymerizable unsaturated monomer having an anionic functional group or a salt thereof.
- the preferred content of the polymer of a polymerizable unsaturated monomer having an anionic functional group or a salt thereof before crosslinking is 0.50 to 35% by mass in the gel sheet.
- the weight average molecular weight of the polymer of a polymerizable unsaturated monomer having an anionic functional group or its salt before crosslinking with a crosslinking agent is in the range of 100,000 to 5,000,000, considering ease of handling during production. It is preferable.
- a synthetic polymer having a network structure can be obtained by crosslinking a polymer of a polymerizable unsaturated monomer having an anionic functional group or a salt thereof. That is, a polymer of a polymerizable unsaturated monomer having an anionic functional group or a salt thereof is mixed with a crosslinking agent (for example, a polymer of a polymerizable unsaturated monomer having an anionic functional group or a salt thereof is mixed with a crosslinking agent). By adding a crosslinking agent) and heating as necessary, a synthetic polymer having a network structure can be obtained.
- a crosslinking agent for example, a polymer of a polymerizable unsaturated monomer having an anionic functional group or a salt thereof is mixed with a crosslinking agent.
- crosslinking agent examples include aluminum hydroxide, potassium alum, aluminum sulfate, aluminum glycinate, aluminum acetate, aluminum oxide, aluminum metasilicate, magnesium chloride, calcium hydroxide, calcium carbonate, magnesium aluminate metasilicate, polyethyleneimine, Examples include polyethylene glycol diglycidyl ether, glycerin triglycidyl ether, triglycidyl isocyanurate, and the like. These crosslinking agents can be used alone or in combination of two or more.
- the preferred content of the crosslinking agent is 0.10 to 5.0% by mass in the gel sheet for cosmetic packs.
- Oil agent used in the gel sheet for cosmetic packs is not particularly limited as long as it is suitable as an oil component provided to the skin.
- the oil agent contains one or more selected from the group consisting of hydrocarbons, waxes, and fats and oils.
- the oils exuded from the gel sheet for cosmetic packs adhere to the skin, suppressing moisture evaporation from the skin, and providing a sustained moisturizing effect on the skin.
- Preferred specific hydrocarbons include, but are not limited to, scrubane, petrolatum, mineral oil, and the like.
- Preferred waxes include, but are not limited to, jojoba seed oil and beeswax.
- oils and fats include, but are not limited to, vegetable oils such as olive oil, macadamia nut oil, argan oil, shea butter, coconut oil, and grapeseed oil, and animal oils such as horse oil.
- the preferred content of the oil agent in the gel sheet for cosmetic packs is 0.10 to 10% by mass.
- a more preferable content is 1.0 to 8.0% by mass.
- the content is preferably 10% by mass or less.
- the exuding agent is an agent used to effectively exude the solution in the hydrogel of the gel sheet for cosmetic packs onto the surface of the hydrogel. It is also called a solution exudation enhancer.
- the solution or water within the hydrogel can be effectively expelled by incorporating a substance that is hydrophilic but also has some degree of hydrophobicity as an exudant.
- Preferred exudants include nonionic water-soluble polymers and electrolytes.
- nonionic water-soluble polymers have a certain degree of hydrophobicity even though they are hydrophilic, and can effectively discharge the solution or water within the hydrogel.
- Preferred nonionic water-soluble polymers include glycols such as polyethylene glycol, polypropylene glycol, and polyglycerin, and polymers such as polyhydric alcohols. These nonionic water-soluble polymers can be used alone or in combination of two or more.
- the moisture absorption of glycerin is 100
- the water-retaining power of nonionic water-soluble polymers prevents the solution within the hydrogel from coming out to the surface of the hydrogel, ensuring a moist feeling and moisturizing effect. It is preferable that there be.
- a more preferable range of specific moisture absorption is 20-45.
- electrolytes can cause the solution within the hydrogel to ooze out onto the surface of the hydrogel by exerting the effect of tightening the network structure of the hydrogel.
- Preferred electrolytes can be used as long as they are easily water-soluble and have a track record of use in cosmetics, etc., but neutral salts of strong acids and strong alkalis are preferred from the viewpoint of solubility and small pH fluctuations. is preferably used.
- Such electrolytes include sodium chloride, potassium chloride, sodium sulfate, potassium sulfate, and the like. These electrolytes can be used alone or in combination of two or more.
- the preferred content of the exudant in the gel sheet for cosmetic packs is 0.10 to 20% by mass, more preferably 1.0 to 10% by mass.
- the preferred content is 0.10 to 20% by mass, more preferably 1.0 to 10% by mass in the gel sheet for cosmetic packs.
- the content of the leaching agent is preferably 0.10% by mass or more in terms of adhesion and leaching effects. Further, the content of the exudant is preferably 20% by mass or less in terms of preventing liquid dripping.
- Gel sheets for cosmetic packs contain a humectant.
- humectants include ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol (DPG), glycerin, diglycerin, isopropylene glycol, 1,3-butylene glycol (1,3-BG), and sorbitol. , marbitol, trehalose, raffinose, xylitol, mannitol, hyaluronic acid and its salts, various derivatives such as trehalose and raffinose, glycols such as trimethylglycine, cyclodextrin, hyaluronic acid and its salts, polyhydric alcohols, polysaccharides, etc. Can be mentioned. These wetting agents can be used alone or in combination of two or more.
- the preferred content of the humectant in the gel sheet for cosmetic packs is 1.0 to 50% by mass.
- the gel sheet for cosmetic packs may contain a nonionic activator for the purpose of increasing the stability of emulsification when the oil agent is dispersed in water and making the average diameter of the oil agent on the surface of the gel sheet for cosmetic packs 5 ⁇ m or less. .
- the nonionic surfactant preferably includes a nonionic surfactant with an HLB value of 6 or less and a nonionic surfactant with an HLB value of 10 or more.
- a nonionic surfactant with an HLB value of 6 or less and a nonionic surfactant with an HLB value of 10 or more.
- the average diameter can be controlled to 5 ⁇ m or less.
- the HLB value is a value that indicates the affinity of a surfactant for water and oil, and is a parameter known as lipophilicity-lipophilic balance.
- the HLB value can be easily determined by a known calculation method such as the Griffin method, Davis method, Atlas method, or Kawakami method.
- the HLB value can be calculated by the atlas method of equation (1) shown below.
- the saponification value and neutralization value in formula (1) can be actually measured according to the method published in the Standard Oil and Fat Analysis Test Method (established by the Japan Oil Chemists' Society) 2003 edition edited by the Japan Oil Chemists' Society. .
- HLB 20(1-S/A)...(1) S is the saponification value of the ester, and A is the neutralization value of the fatty acid.
- Saponification value is the number of mg of potassium hydroxide consumed when 1g of fatty acid ester of polyhydric alcohol is hydrolyzed with potassium hydroxide
- neutralization value is the number of mg of potassium hydroxide consumed when 1g of fatty acid ester of polyhydric alcohol is hydrolyzed with potassium hydroxide. This is the number of mg of potassium hydroxide required for neutralization.
- HLB values of known surfactants are well known, and those skilled in the art can appropriately select nonionic surfactants with an HLB value of 6 or less and nonionic surfactants with an HLB value of 10 or more.
- the nonionic surfactant is not particularly limited as long as it is a nonionic surfactant with an HLB value of 6 or less and a nonionic surfactant with an HLB value of 10 or more.
- Examples include polyoxyethylene cholestanol ether
- the nonionic surfactant with an HLB value of 6 or less may be any nonionic surfactant with an HLB value of 6 or less, for example, polyglyceryl-2 oleate, polyglyceryl-4 stearate, polyglyceryl-stearate. 2, polyglyceryl-2 isostearate, polyglyceryl-2 diisostearate, polyglyceryl-2 triisostearate, etc., but preferred are polyglyceryl-2 oleate, polyglyceryl-4 isostearate, and polyglyceryl-2 diisostearate. There may be one type of nonionic surfactant having an HLB value of 6 or less, or two or more types may be used.
- the nonionic surfactant having an HLB value of 10 or more may be any nonionic surfactant having an HLB value of 10 or more, such as polyglyceryl-4 laurate, polyglyceryl-6 laurate, polyglyceryl-6 laurate, etc. 10, polyglyceryl-6 myristate, polyglyceryl-10 myristate, polyglyceryl-10 palmitate, polyglyceryl-10 stearate, polyglyceryl-10 diisostearate, etc., preferably polyglyceryl-4 laurate, polyglyceryl-6 laurate. , polyglyceryl-10 laurate. There may be one type of nonionic surfactant having an HLB value of 10 or more, or two or more types may be used.
- the gel sheet for cosmetic packs contains a nonionic surfactant with an HLB value of 6 or less and a nonionic surfactant with the HLB value of 10 or more, both of which are polyglycerin fatty acid esters. According to such a configuration, it is possible to more effectively disperse the oil agent, stabilize the emulsification, and control the average diameter of the oil agent on the surface of the gel sheet for a cosmetic pack to 5 ⁇ m or less.
- the preferred content of the nonionic surfactant with an HLB value of 6 or less is 0.50 to 5.0% by mass in the gel sheet for cosmetic packs.
- the preferred content of the nonionic surfactant having an HLB value of 10 or more is 0.50 to 5.0% by mass in the gel sheet for cosmetic packs.
- the content of nonionic surfactants with an HLB value of 6 or less is 0.50 to 5.0% by mass, and the content of nonionic surfactants with an HLB value of 10 or more is 0.50% by mass.
- a content of 50 to 5.0% by mass is more preferable in terms of dispersion of the oil agent, stabilization of emulsification, and control of the average diameter of the oil agent on the surface of the gel sheet for cosmetic packs to 5 ⁇ m or less.
- the gel sheet for cosmetic packs may contain a nonionic surfactant other than a nonionic surfactant with an HLB value of 6 or less and a nonionic surfactant with an HLB value of 10 or more.
- the gel sheet for cosmetic packs may further contain a thickener for the purpose of increasing the viscosity of the hydrogel and the gel sheet for cosmetic packs.
- Preferred thickeners include polysaccharides and their derivatives, such as cellulose, guar gum, cationized guar gum, starch, xanthan gum, and hydroxypropyl guar gum. Hydroxypropyl guar gum is more preferred in terms of improved dripping properties, improved adhesion, and/or moisturizing feeling after use.
- Hydroxypropyl guar gum is made from guar gum, a natural water-soluble polymeric polysaccharide contained in the seed endosperm of guar, a legume, as a raw material, by reacting sodium hydroxide and propylene oxide to obtain hydroxyl groups. It is a nonionic polymer obtained by substitution with hydroxypropyl groups.
- the degree of substitution of hydroxypropyl groups in hydroxypropyl guar gum is preferably 0.4 to 1.2. More preferably, a value of 0.6 to 1.0 is even more effective.
- the preferred content of the thickener is 0.050 to 3.0% by mass in the gel sheet for cosmetic packs. 0.050% by mass or more is preferable in terms of improving dripping properties, improving adhesion, and/or feeling moisturized after use, and in terms of suppressing high viscosity and strong stickiness, 3. It is preferably .0% by mass or less.
- the thickener is hydroxypropyl guar gum
- it is preferably 0.050 to 3.0% by mass, more preferably 0.050 to 2.0% by mass, and 0.050 to 3.0% by mass, more preferably 0.050 to 2.0% by mass, in the gel sheet for cosmetic packs. Most preferably, it is 10 to 1.0% by weight.
- gel sheets for cosmetic packs contain ⁇ -hydroxy acids such as tartaric acid, lactic acid, and glycolic acid, as well as various organic acids such as citric acid.
- An inorganic acid such as hydrochloric acid may be included as a pH adjuster.
- the preferred content of the pH adjuster is 0.10 to 10% by mass in the gel sheet for cosmetic packs.
- the total amount of water is preferably 45 to 97% by weight, more preferably 50 to 95% by weight based on the gel sheet for cosmetic packs.
- the gel sheet for cosmetic packs according to the embodiment of the present invention may contain components other than the above-mentioned components.
- examples of such components include preservatives, antioxidants, antibacterial agents, medicinal ingredients, sequestrants, fragrances, and colorants. These components are added to the extent that they do not impair the effects of the present invention.
- the average diameter of the oil agent on the surface of the gel sheet is 5 ⁇ m or less.
- the average diameter of oil droplets is defined as the average value of the diameters of 100 or more oil droplets on the surface of a gel sheet observed with an optical microscope.
- the average diameter of oil droplets is more preferably defined as the average value of the diameters of 100 or more oil droplets observed with an optical microscope. Assuming that the average diameter of oil agents in conventional gel sheets for cosmetic packs is in a range larger than 5 ⁇ m, the gel sheet for cosmetic packs according to the embodiment of the present invention has a smaller oil droplet size on the gel surface.
- a sustained moisturizing effect on the skin can be achieved by suppressing water evaporation by exuding the humectant from the gel using the exudant and supplying the oil on the surface of the gel to the skin.
- An intermediate base material may be embedded in the cosmetic pack gel sheet of the embodiment of the present invention along the in-plane direction.
- the in-plane direction of the hydrogel refers to any direction within a plane perpendicular to the thickness direction of the hydrogel.
- Having an intermediate base material leads to reinforcement of the hydrogel and improvement of shape retention during cutting.
- the intermediate base material can be composed of a nonwoven fabric or a woven fabric.
- the materials for the nonwoven fabrics and woven fabrics can be natural fibers such as cellulose, silk, and hemp, synthetic fibers such as polyester, nylon, rayon, polyethylene, polypropylene, and polyurethane, or blends thereof.
- a binder may also be used.
- the method for producing the nonwoven fabric is not particularly limited, but examples include a dry method, a wet method, a spunbond method, a melt blown method, an air laid method, a chemical bond method, a thermal bond method, a needle punch method, and a hydroentangling method. It is more preferable to adopt a manufacturing method according to the fabric weight and material, and to have no uneven fabric weight for controlling the position of the intermediate base material.
- the woven fabric is not particularly limited, and can be selected as appropriate, such as plain weave, tricot, and raschel.
- the basis weight of the woven fabric or nonwoven fabric is not particularly limited as long as it can obtain predetermined physical properties as an intermediate base material, but for example, it is preferably 10 to 40 g/m 2 and 10 to 28 g/m More preferably, it is m2 . If the fabric weight of the woven fabric or non-woven fabric is too small, it may not be possible to reinforce the gel sheet, or the uneven fabric weight may become large, causing the liquid permeability during gel sheet manufacturing to vary depending on the location, which may cause the intermediate base material to The location may change. In addition, if the basis weight is too large, the intermediate base material will become hard, which may impair the ability of the hydrogel to follow the skin or adversely affect the conductivity, so it should be set appropriately with these balances in mind. be done.
- the setting is made appropriately taking these into consideration.
- it is within the range of 0.050 mm to 2.0 mm. Further, it is more preferably 0.050 mm to 0.50 mm, and particularly preferably 0.080 mm to 0.30 mm.
- the thickness of the gel sheet for cosmetic packs of the present invention may be uniform as a whole or may have different thicknesses in parts. However, in order to ensure adhesion, transparency, and strength, the thickness is preferably 0.10 to 3.0 mm, more preferably 0.20 to 2.0 mm. In terms of the strength of the gel sheet, the thickness is preferably 0.1 mm or more, and in terms of adhesiveness, the thickness is preferably 3.0 mm or less so that the weight of the gel sheet does not become too heavy.
- FIG. 1 shows gel sheets 10L and 10R for cosmetic packs for the left and right under eyes, respectively.
- FIG. 2 shows a gel sheet 20 for a cosmetic pack that is used by being attached to the skin of the face.
- FIG. 3 shows a gel sheet 20U for a cosmetic pack formed in a size corresponding to the upper half of the face.
- FIG. 4 shows a gel sheet 20L for a cosmetic pack formed in a size suitable for the lower half of the face.
- a pair of gel sheets 10L and 10R for cosmetic packs shown in FIG. 1 are gel sheets for cosmetic packs for the left under eye and the right under eye, respectively.
- the cosmetic pack gel sheet 10L has a substantially arc-shaped lower contour in FIG. 1 that follows the lower eyelid of the left eye, and is pasted on the skin just below the left eye so that the contour follows the lower eyelid of the left eye. It is used.
- the cosmetic pack gel sheet 10R has a generally arcuate upper contour in Figure 1 that follows the lower eyelid of the right eye, and is used by pasting it on the skin just below the right eye so that the contour follows the lower eyelid of the right eye. It is something that will be done.
- the shape of the gel sheet for a cosmetic pack used by being attached to the face is not limited to the shape shown in FIG. 1, but may be a shape corresponding to the entire face as shown in FIG. 2.
- the gel sheet 20 for a cosmetic pack shown in FIG. 2 is a gel sheet for a cosmetic pack for the entire face formed in a size corresponding to the entire face, and has two through holes 22 provided in a portion corresponding to the eyes.
- the gel sheet for cosmetic pack used by pasting it on the face may be a gel sheet for cosmetic pack 20U formed in a size corresponding to the upper half of the face as shown in FIG. 3, and as shown in FIG.
- the cosmetic pack gel sheet 20L may be formed in a size suitable for the lower half of the face.
- the cosmetic pack gel sheet 20U formed in a size corresponding to the upper half of the face and the cosmetic pack gel sheet 20L formed in a size corresponding to the lower half of the face are to be used separately. Alternatively, they may be used in combination with each other to be attached to the entire face.
- the size corresponding to the upper half of the face does not include the part corresponding to the jaw and the cheek, but includes at least the part corresponding to the forehead, and the size corresponds to the lower half of the face.
- the relevant size refers to a size that does not include a portion corresponding to the forehead, but includes at least a portion corresponding to the chin and a portion corresponding to the cheek.
- FIGS. 3 and 4 the same members as those in FIG. 2 are given the same reference numerals and their explanations will be omitted.
- the gel sheet for cosmetic packs according to the embodiment of the present invention may be a gel sheet for cosmetic packs that is used by being attached to a site other than the face, for example, the surface of the hand.
- the gel sheet for a cosmetic pack according to an embodiment of the present invention contains 1 to 25% by mass of a water-retaining oil agent, 0.4 to 6% by mass of phospholipid, 0.1 to 10% by mass of acrylic acid polymer, Gel compositions for skin application containing 0.1 to 10% by mass of water-soluble polysaccharides capable of forming gels and water are excluded.
- a method for manufacturing the gel sheet for cosmetic packs includes a step of preparing an emulsion by mixing an oil containing a nonionic surfactant with an HLB value of 6 or less and water containing a nonionic surfactant with an HLB value of 10 or more;
- a gel-like composition having a network structure is obtained by mixing a polymer of a polymerizable unsaturated monomer having an anionic functional group or a salt of these polymers, a leaching agent, a wetting agent, a crosslinking agent, water, and the above emulsion. It involves the process of forming something.
- an emulsion is prepared by mixing an oil containing a nonionic surfactant with an HLB value of 6 or less and water containing a nonionic surfactant with an HLB value of 10 or more.
- the nonionic surfactant with an HLB value of 6 or less and the nonionic surfactant with an HLB value of 10 or more are as described above as components of the gel sheet for cosmetic packs.
- a polymer of a polymerizable unsaturated monomer having an anionic functional group or a salt of these polymers, a leaching agent, a wetting agent, a crosslinking agent, water, and the above emulsion are mixed, and the anionic functional group is A polymer of the polymerizable unsaturated monomer or a salt of the polymer is reacted with a crosslinking agent to obtain a gelled composition having a network structure.
- the emulsion is stable, the emulsion is further mixed with a polymer of a polymerizable unsaturated monomer having an anionic functional group or a salt of these polymers, a leaching agent, a crosslinking agent, a wetting agent, and water. It is stable even in the form of a slurry composition, and even when the slurry is gelled, the average diameter of oil droplets on the gel surface can be controlled to 5 ⁇ m or less.
- a pH adjuster is added to the slurry to adjust the pH of the slurry to 4 to 7, and a polymer of a polymerizable unsaturated monomer having an anionic functional group or a salt of such a polymer, Accelerates reaction with crosslinking agents.
- a leaching agent When mixing a polymer of a polymerizable unsaturated monomer having an anionic functional group or a salt of these polymers, a leaching agent, a crosslinking agent, a wetting agent, water, and an emulsion, these components must be mixed at once. Alternatively, each component may be mixed separately. Preferably, for homogeneous dispersion of the thickener within the hydrogel, the thickener is preliminarily added to a polymer of a polymerizable unsaturated monomer having an anionic functional group or a combination of these polymers before forming the gel. Mix with salt and wetting agent. The leaching agent may be mixed with the mixture or added later.
- a crosslinking agent to the mixture to cause a reaction between a polymer of a polymerizable unsaturated monomer having an anionic functional group or a salt of the polymer and the crosslinking agent.
- Other ingredients are added at appropriate times before gelation.
- the nonionic surfactant to be added is only one type of nonionic surfactant with an HLB value of 6 or less, or a nonionic surfactant with an HLB value of 10 or more, or a nonionic surfactant with an HLB value of 6 or less. If you use only two types of nonionic surfactants with an HLB value of 10 or more, or only two types of nonionic surfactants with an HLB value of greater than 6 and less than 10, a stable emulsion will not be produced and the gel surface will deteriorate.
- the oil droplet size also becomes larger than 5 ⁇ m.
- a nonionic surfactant with an HLB value of 6 or less is added to an oil agent, and a nonionic surfactant with an HLB value of 10 or more is added to water. Mix the ingredients to make an emulsion.
- the ratio of the nonionic surfactant with an HLB value of 6 or less to the oil agent is preferably 0.1 to 0.5 in terms of mass ratio.
- the ratio of the nonionic surfactant having an HLB value of 10 or more to water is preferably 0.01 to 1 in terms of mass ratio.
- a polymer of a polymerizable unsaturated monomer having an anionic functional group or a salt of these polymers, an optional thickener, a wetting agent, and water are mixed to prepare a liquid mixture.
- the ratio of the polymer of the polymerizable unsaturated monomer having an anionic functional group or the salt of these polymers, the wetting agent, and water is preferably 0.5 to 35:1 to 50:45 to 97 in terms of mass ratio.
- the ratio is more preferably 1 to 30:2 to 35:50 to 95, and even more preferably 2 to 25:3 to 30:55 to 90.
- the proportion of the polymer of the polymerizable unsaturated monomer having an anionic functional group or the salt of these polymers, the thickener, the wetting agent, and the water is preferably 0 in terms of mass ratio. .5-35:0.05-3:1-50:45-97, more preferably 1-30:0.1-2:2-35:50-95, even more preferably 2-25 :0.2 ⁇ 1:3 ⁇ 30:55 ⁇ 90.
- the exuding agent is preferably added to the gel sheet for cosmetic packs in an amount of 0.10 to 20% by mass, more preferably 1.0 to 10% by mass.
- the crosslinking agent is preferably added to the gel sheet for cosmetic packs in an amount of 0.10 to 5.0% by mass.
- the pH adjuster is added to adjust the pH of the mixed solution to 4 to 7.
- the ingredients are blended in the following amounts with respect to the total ingredients for constituting the gel sheet for cosmetic pack: Oil agent: preferably 2 to 10% by mass Nonionic surfactant with HLB value of 6 or less: preferably 0.50 to 5.0% by mass Nonionic surfactant with HLB value of 10 or more: preferably 0.50 to 5.0% by mass Polymer of a polymerizable unsaturated monomer having an anionic functional group or a salt thereof: preferably 0.50 to 35% by mass Thickener: preferably 0.050 to 3.0% by mass Wetting agent: preferably 1.0 to 50% by mass Extractant: preferably 0.10 to 20% by mass, more preferably 1.0 to 12% by mass, even more preferably 1 to 10% by mass Crosslinking agent: preferably 0.10 to 5.0% by mass, more preferably 0.50 to 2.0% by mass pH adjuster: preferably 0.10 to 10% by mass Water: preferably 45 to 97% by mass, more preferably 50 to 95% by mass
- Oil agent preferably 2 to 10% by mass
- Hydrogel is produced by pouring a gel composition, which is a mixture of various components for forming a gel sheet for cosmetic packs, into a container of a desired shape, such as a bottomed container with a substantially rectangular cross section, and then crosslinking and/or curing the gel composition. , it can be molded into a desired shape such as a sheet shape.
- the shape of the hydrogel sheet can be any shape depending on the purpose, and examples include, but are not limited to, a substantially rectangular shape, a substantially circular shape, and the like.
- the manufacturing process of the gel sheet for cosmetic packs is not particularly limited, and the conditions can be changed depending on the composition of the hydrogel, the material, thickness, etc. of the intermediate base material. .
- the intermediate base material in the air with a certain tension applied to it, hold the upper side of the intermediate base material in the air, and place each component on the upper and lower sides of the intermediate base material.
- a method of pouring a mixed gel composition and crosslinking and/or curing it to form a sheet After producing two gel sheets with smooth surfaces, an intermediate base material held under a certain tension is A method of sandwiching these gel sheets to form a composite; Alternatively, a gel sheet with a smooth surface is prepared, an intermediate base material is placed on top of this gel sheet under a certain tension, and the intermediate base material is A method of pouring a gel composition mixed with each component onto the gel composition and crosslinking and/or curing it can be appropriately adopted.
- dispersion of the oil agent, stabilization of emulsification, and control of the average diameter of the oil agent on the surface of the gel sheet for cosmetic packs to 5 ⁇ m or less are more effectively performed, and the size of the oil droplets of the oil agent on the surface of the gel sheet is reduced.
- a gel sheet for cosmetic packs having an average diameter of 5 ⁇ m or less can be produced.
- a nylon knitted fabric (tricot half) with a basis weight of 17 g/m 2 was sandwiched between a 38 ⁇ m thick PET film (polyethylene terephthalate film) and a 100 ⁇ m thick PET film as an intermediate base material, and the total thickness was 1 mm.
- an appropriate amount of the above-mentioned composition was poured into the center of the mixture to form a sheet. This was left as it was for 24 hours to obtain a gel sheet with a thickness of 1 mm. This gel sheet was cut into the shape of a face and used as a sample for evaluation.
- Examples 2 to 10 As shown in Tables 1 to 3, gel sheet samples of Examples 2 to 10 were produced in the same manner as in Example 1, except that the composition for forming the gel sheet was changed.
- Comparative example 1 Unlike Examples 1 to 10, a thickener, wetting agent, surfactant, and An oil agent was added, followed by an exudant and water, and the mixture was thoroughly kneaded until uniform. A crosslinking agent, a preservative, and water were added to this mixture and the mixture was well dispersed to form a slurry. A pH adjuster was added to this slurry to make a total of 100 parts by mass, and the mixture was thoroughly kneaded and stirred.
- Comparative Examples 2-3 As shown in Table 1, each gel sheet sample of Comparative Examples 2 to 3 was manufactured in the same manner as Comparative Example 1, except that the composition for forming the gel sheet was changed.
- Comparative Examples 4 to 11 As shown in Tables 2 to 3, gel sheet samples of Comparative Examples 4 to 11 were produced in the same manner as in Example 1, except that the composition for forming the gel sheet was changed.
- HLB value measurement method The HLB value was calculated by the atlas method of the following formula (1).
- saponification value and neutralization value in formula (1) were determined by the method published in the Standard Oil and Fat Analysis Test Method (established by the Japan Oil Chemists' Society) 2003 edition compiled by the Japan Oil Chemists' Society.
- HLB 20(1-S/A)...(1) S: Saponification value of ester, A: Neutralization value of fatty acid Saponification value is the number of mg of potassium hydroxide consumed when 1 g of fatty acid ester of polyhydric alcohol is hydrolyzed with potassium hydroxide. The sum value is the number of mg of potassium hydroxide required to neutralize 1 g of constituent fatty acids of a fatty acid ester of a polyhydric alcohol.
- the average diameter of oil droplets can be determined by image observation using a Keyence Shape Analysis Laser Microscope VK-X1000 with a 20x objective lens or a 50x objective lens. It was defined as the average value of the diameters of 100 oil droplets observed in the mode.
- Results Table 4 shows the surfactants used in the production of the gel sheet samples of Examples and Comparative Examples and their HLB values.
- the wetting agents were 1,3-BG and DPG, and the type and ratio of the wetting agents were changed, but the emulsion and slurry were stable, and the average diameter of oil droplets on the gel surface was 2. .1 ⁇ m, the skin was kept moisturized for a long time.
- the oil agent was jojoba oil, but the emulsion and slurry were stable, the average diameter of the oil droplets on the gel surface was 4.2 ⁇ m, and the skin remained moisturized.
- the emulsions and slurries remained stable even when different types of nonionic surfactants were used, one with an HLB value of 6 or less and the other with an HLB value of 10 or more.
- the average diameter of oil droplets on the gel surface was 5 ⁇ m or less, and skin moisturization was extremely sustained.
- the wetting agents were 1,3-BG and DPG, and the type and ratio of the wetting agents were changed.
- a polymer or a salt thereof, a thickener, a wetting agent, a surfactant, and an oil agent are kneaded all at once, the stability of the slurry is poor and the oil agent separates.
- the average diameter of oil droplets on the gel surface was larger than 5 ⁇ m, and moisture retention was not maintained.
- Comparative Example 8 when a nonionic surfactant with an HLB value of more than 6 and less than 10 and a nonionic surfactant with an HLB value of 10 or more were used, the stability of the emulsion and slurry was poor and the oil agent separated. The average diameter of oil droplets on the gel surface was larger than 5 ⁇ m, and moisture retention was not maintained.
- Comparative Examples 9 to 11 when only two types of nonionic surfactants with an HLB value of 10 or more or only two types of nonionic surfactants with an HLB value of 6 or less were used, the stability of the emulsion and slurry was poor. , the oil separated. The average diameter of oil droplets on the gel surface was larger than 5 ⁇ m, and moisture retention was not maintained. Furthermore, since the compositions of Comparative Example 10 and Comparative Example 11 do not contain an exuding agent, the solution containing the oil agent cannot effectively ooze out onto the gel surface, making it difficult for the oil agent to be supplied to the skin. , moisture retention did not last.
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Abstract
Description
項1.
網目構造を有する合成高分子、油剤、滲出剤、湿潤剤及び水を含む化粧品パック用ゲルシートであって、ゲルシート表面の油剤の平均径が5μm以下であることを特徴とする化粧品パック用ゲルシート。
項2.
前記油剤が炭化水素、ロウ類、及び油脂から成る群から選択された1種又は2種以上を含有する項1記載の化粧品パック用ゲルシート。
項3.
前記滲出剤を化粧品パック用ゲルシート中に0.1~20質量%含む項1又は2記載の化粧品パック用ゲルシート。
項4.
前記滲出剤が非イオン性水溶性高分子を含有する項1~3のいずれか一項記載の化粧品パック用ゲルシート。
項5.
前記網目構造を有する合成高分子が、アニオン性官能基を有する重合性不飽和単量体の重合体又はそれら重合体の塩と架橋剤との架橋体である項1~4のいずれか一項記載の化粧品パック用ゲルシート。
項6.
HLB値が6以下の非イオン界面活性剤と、HLB値が10以上の非イオン界面活性剤とをさらに含む項1~5のいずれか一項記載の化粧品パック用ゲルシート。
項7.
前記HLB値が6以下の非イオン界面活性剤及び前記HLB値が10以上の非イオン界面活性剤の両方が、ポリグリセリン脂肪酸エステルである項6記載の化粧品パック用ゲルシート。
項8.
前記HLB値が6以下の非イオン界面活性剤を0.5質量%以上、前記HLB値が10以上の非イオン界面活性剤を0.5質量%以上含む項6又は7記載の化粧品パック用ゲルシート。
項9.
項1~8のいずれか一項記載の化粧品パック用ゲルシートの製造方法であって、
HLB値が6以下の非イオン界面活性剤を添加した油剤と、HLB値が10以上の非イオン界面活性剤を添加した水とを混合して、乳化液を作製する工程、及び
アニオン性官能基を有する重合性不飽和単量体の重合体又はそれら重合体の塩、滲出剤、湿潤剤、架橋剤、水、及び前記乳化液を混合し、網目構造を有するゲル状の組成物を形成する工程
を含む、化粧品パック用ゲルシートの製造方法。
本明細書に段階的に記載されている数値範囲において、ある段階の数値範囲の上限値又は下限値は、他の段階の数値範囲の上限値又は下限値と任意に組み合わせることができる。また、本明細書に記載されている数値範囲において、その数値範囲の上限値又は下限値は、実施例に示されている値又は実施例から一義的に導き出せる値に置き換えてもよい。更に、本明細書において、「~」で結ばれた数値は、「~」の前後の数値を下限値及び上限値として含む数値範囲を意味する。
本発明の態様において、網目構造を有する合成高分子、油剤、滲出剤、湿潤剤、及び水を含む化粧品パック用ゲルシートであって、ゲルシート表面の油剤の平均径が5μm以下であることを特徴とする化粧品パック用ゲルシートが提供される。
網目構造を有する合成高分子としては、少なくとも水を含んでゲルを形成することができさえすれば特に限定されない。ハイドロゲルを化粧品の分野で経皮用途として使用する場合は、当該分野で許容される合成高分子が使用できる。特に、水と親和性がある合成高分子が使用される。例えば、網目構造を有する合成高分子は、アニオン性官能基を有する重合性不飽和単量体の重合物又はその塩と、架橋剤との架橋体である。
化粧品パック用ゲルシートに使用される油剤は、皮膚へ提供される油成分として適するものであれば特に限定されない。
滲出剤とは、化粧品パック用ゲルシートのハイドロゲル内の溶液を効果的にハイドロゲル表面に滲み出させるために使用される剤である。溶液滲出促進剤とも称する。例えば、親水性でありながらもある程度の疎水性を有する物質を滲出剤として配合することにより、ハイドロゲル内の溶液又は水を効果的に吐出させることができる。ハイドロゲル表面に滲出、つまり化粧品パック用ゲルシートの外へ滲出した溶液(ブリード液)は、化粧品パック用ゲルシートと接している皮膚へ移行する。
化粧品パック用ゲルシートは、湿潤剤を含む。
化粧品パック用ゲルシートは、油剤を水に分散させたときの乳化の安定性を高め、かつ化粧品パック用ゲルシートの表面の油剤の平均径を5μm以下にする目的で、非イオン活性剤を含んでもよい。
Sはエステルのけん化価、Aは脂肪酸の中和価である。
化粧品パック用ゲルシートは、ハイドロゲル及び化粧品パック用ゲルシートの粘度を上げる目的で、増粘剤をさらに含んでもよい。
架橋剤の作用に最適なpHに調整し、架橋をより確実にする目的で、化粧品パック用ゲルシートは、酒石酸、乳酸、グリコール酸等のα-ヒドロキシ酸のほか、クエン酸等の各種有機酸や塩酸等の無機酸を、pH調整剤として含んでもよい。これらのpH調整剤は単独又は2種以上を混合して用いることができる。
水は合計で化粧品パック用ゲルシートに対して好ましくは45~97質量%、より好ましくは50~95質量%である。
いくつかの実施形態において、本発明の実施形態の化粧品パック用ゲルシートは、抱水性油剤1~25質量%、リン脂質0.4~6質量%、アクリル酸系ポリマー0.1~10質量% 、ゲルを形成可能な水溶性多糖類0.1~10質量% 、及び水を含有する皮膚貼付用ゲル組成物を除く。
本発明の別の態様において、上記化粧品パック用ゲルシートの製造方法が提供される。かかる方法は、HLB値が6以下の非イオン界面活性剤を添加した油剤と、HLB値が10以上の非イオン界面活性剤を添加した水とを混合して、乳化液を作製する工程、及びアニオン性官能基を有する重合性不飽和単量体の重合体又はそれら重合体の塩、滲出剤、湿潤剤、架橋剤、水、及び前記乳化液を混合し、網目構造を有するゲル状の組成物を形成する工程を含む。
油剤:好ましくは2~10質量%
HLB値が6以下の非イオン界面活性剤:好ましくは0.50~5.0質量%
HLB値が10以上の非イオン界面活性剤:好ましくは0.50~5.0質量%
アニオン性官能基を有する重合性不飽和単量体の重合物又はその塩:好ましくは0.50~35質量%
増粘剤:好ましくは0.050~3.0質量%
湿潤剤:好ましくは1.0~50質量%
滲出剤:好ましくは0.10~20質量%、より好ましくは1.0~12質量%、さらに好ましくは1~10質量%
架橋剤:好ましくは0.10~5.0質量%、より好ましくは0.50~2.0質量%
pH調整剤:好ましくは0.10~10質量%
水:好ましくは45~97質量%、より好ましくは50~95質量%
1.ゲルシートの製造
(実施例1)
表1に示す組成(質量%)にて、HLB6以下の非イオン界面活性剤を添加した油剤に、HLB値10以上の非イオン界面活性剤を添加した水を加え、ホモジナイザーで9,000rpmで5分間撹拌し、乳化液を作製した。アニオン性官能基を有する重合性不飽和単量体の重合体又はその塩に、増粘剤、湿潤剤を加え、さらに滲出剤を加えて均一になるまで十分に混練した。この混合物に、乳化液と、架橋剤、防腐剤、水を加えてよく分散させスラリーとした。このスラリーにpH調整剤を加えて合計100質量部として、十分に混練撹拌した。
表1~3に示すように、ゲルシートを形成するための組成を変更した以外は、実施例1と同様の方法で、実施例2~10の各々のゲルシート試料を製造した。
実施例1~10とは異なり、乳化液を作製せずに、アニオン性官能基を有する重合性不飽和単量体の重合体又はその塩に、増粘剤、湿潤剤、界面活性剤、及び油剤を加え、さらに滲出剤と水を加えて均一になるまで十分に混練した。この混合物に架橋剤、防腐剤、水を加えてよく分散させスラリーとした。このスラリーにpH調整剤を加えて合計100質量部として、十分に混練撹拌した。
表1に示すように、ゲルシートを形成するための組成を変更した以外は、比較例1と同様の方法で、比較例2~3の各々のゲルシート試料を製造した。
表2~3に示すように、ゲルシートを形成するための組成を変更した以外は、実施例1と同様の方法で、比較例4~11の各々のゲルシート試料を製造した。
(1)HLB値の測定方法
HLB値は、次に示す式(1)のアトラス法により算出した。また、式(1)中のけん化価と中和価は、社団法人日本油化学会編 基準油脂分析試験法(日本油化学会制定)2003年度版が発行されている方法により求めた。
S:エステルのけん化価、A:脂肪酸の中和価
ケン化価は、多価アルコールの脂肪酸エステル1gを、水酸化カリウムで加水分解するときに消費される水酸化カリウムのmg数であり、中和価は多価アルコールの脂肪酸エステルの構成脂肪酸1gを中和する為に要する水酸化カリウムのmg数である。
油滴の平均径は、キーエンス社製「形状解析レーザー顕微鏡 VK-X1000」を用いて、20倍対物レンズ又は50倍対物レンズで、画像観察モードで観察した100個の油滴の直径の平均値として規定した。
実施例及び比較例の各々にて作製した乳化液を、24時間静置し、目視で観察した。静置した乳化液の油が分離していない場合をPASS、静置した乳化液が分離した場合をFAILとした。
実施例及び比較例の各々にて作製したスラリーを24時間静置し、目視で観察した。スラリーの油が分離していない場合をPASS、スラリーの油が分離した場合をFAILとした。
顔の形状に切り取ったゲルパックを、10名の女性被験者の顔に20分間装着し、ゲルパック剥がしてから2時間後の肌の状態を、保湿の持続が感じられるか否かの点から以下のように評価した。
A: 肌の保湿が非常に持続されている。
B: 肌の保湿が持続されている。
C: 肌の保湿があまり持続されていない。
D: 肌の保湿が持続されていない。
実施例及び比較例のゲルシート試料の製造に使用した界面活性剤とそのHLB値は表4の通りであった。
Claims (9)
- 網目構造を有する合成高分子、油剤、滲出剤、湿潤剤及び水を含む化粧品パック用ゲルシートであって、ゲルシート表面の油剤の平均径が5μm以下であることを特徴とする化粧品パック用ゲルシート。
- 前記油剤が炭化水素、ロウ類、及び油脂から成る群から選択された1種又は2種以上を含有する請求項1記載の化粧品パック用ゲルシート。
- 前記滲出剤を化粧品パック用ゲルシート中に0.1~20質量%含む請求項1記載の化粧品パック用ゲルシート。
- 前記滲出剤が非イオン性水溶性高分子を含有する請求項1記載の化粧品パック用ゲルシート。
- 前記網目構造を有する合成高分子が、アニオン性官能基を有する重合性不飽和単量体の重合体又はそれら重合体の塩と架橋剤との架橋体である請求項1~4記載の化粧品パック用ゲルシート。
- HLB値が6以下の非イオン界面活性剤と、HLB値が10以上の非イオン界面活性剤とをさらに含む請求項1~5のいずれか一項記載の化粧品パック用ゲルシート。
- 前記HLB値が6以下の非イオン界面活性剤及び前記HLB値が10以上の非イオン界面活性剤の両方が、ポリグリセリン脂肪酸エステルである請求項6記載の化粧品パック用ゲルシート。
- 前記HLB値が6以下の非イオン界面活性剤を0.5質量%以上、前記HLB値が10以上の非イオン界面活性剤を0.5質量%以上含む請求項6記載の化粧品パック用ゲルシート。
- 請求項1~5のいずれか一項記載の化粧品パック用ゲルシートの製造方法であって、
HLB値が6以下の非イオン界面活性剤を添加した油剤と、HLB値が10以上の非イオン界面活性剤を添加した水とを混合して、乳化液を作製する工程、及び
アニオン性官能基を有する重合性不飽和単量体の重合体又はそれら重合体の塩、滲出剤、湿潤剤、架橋剤、水、及び前記乳化液を混合し、網目構造を有するゲル状の組成物を形成する工程
を含む、化粧品パック用ゲルシートの製造方法。
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2002020257A (ja) * | 2000-06-30 | 2002-01-23 | Lion Corp | 皮脂除去用シート状パック剤 |
JP2003183147A (ja) * | 2001-12-18 | 2003-07-03 | Sekisui Plastics Co Ltd | シート状含水ゲル |
JP2007112757A (ja) * | 2005-10-21 | 2007-05-10 | Kao Corp | シート状組成物 |
JP2009108006A (ja) * | 2007-10-31 | 2009-05-21 | Fujifilm Corp | ゲルシートの製造方法、ゲルシート、およびシート状化粧料 |
US20220023159A1 (en) * | 2020-07-24 | 2022-01-27 | Amorepacific Corporation | Sheet-type mask gel composition, mask sheet comprising the same and manufacturing method of mask sheet |
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- 2023-01-26 WO PCT/JP2023/002379 patent/WO2023188754A1/ja active Application Filing
- 2023-01-26 CN CN202380027437.1A patent/CN118871081A/zh active Pending
- 2023-02-24 TW TW112107101A patent/TW202342140A/zh unknown
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2002020257A (ja) * | 2000-06-30 | 2002-01-23 | Lion Corp | 皮脂除去用シート状パック剤 |
JP2003183147A (ja) * | 2001-12-18 | 2003-07-03 | Sekisui Plastics Co Ltd | シート状含水ゲル |
JP2007112757A (ja) * | 2005-10-21 | 2007-05-10 | Kao Corp | シート状組成物 |
JP2009108006A (ja) * | 2007-10-31 | 2009-05-21 | Fujifilm Corp | ゲルシートの製造方法、ゲルシート、およびシート状化粧料 |
US20220023159A1 (en) * | 2020-07-24 | 2022-01-27 | Amorepacific Corporation | Sheet-type mask gel composition, mask sheet comprising the same and manufacturing method of mask sheet |
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