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
  • A61K8/04—Dispersions; Emulsions
  • A61K8/06—Emulsions
• • 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
  • A61K8/72—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
  • A61K8/87—Polyurethanes
• • 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
  • A61K8/89—Polysiloxanes
  • A61K8/891—Polysiloxanes saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
• • 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
  • A61K8/89—Polysiloxanes
  • A61K8/891—Polysiloxanes saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
  • A61K8/893—Polysiloxanes saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone modified by an alkoxy or aryloxy group, e.g. behenoxy dimethicone or stearoxy dimethicone
• • 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 an oil-in-water cosmetic that is comfortable to use and has little stickiness.
• Oil-based ingredients are blended into cosmetics depending on the purpose, but when oil-based ingredients are blended into cosmetics that are mainly made of water, they are sometimes called oil-in-water cosmetics, in which the oil-based ingredients are dispersed in water.
• oil-in-water cosmetics in which the oil-based ingredients are dispersed in water.
• oil-in-water cosmetics which aim to utilize the functions of drugs and other substances contained in oily ingredients, are used in a variety of applications, and oil-in-water cosmetics with a variety of viscosities have also been developed.
• Cosmetics with relatively high viscosity can be unsatisfactory in use due to stickiness and other factors, but the feel of oil-in-water cosmetics can be impaired due to their oily ingredients, and further improvements in the feel of use are also required.
• cosmetics with high viscosity are often in the form of gels or creams, but in the case of cleansers and pack cosmetics, the texture and luxurious feel can be determined by the appearance inside the container or after being removed from the container, so it is desirable to improve the appearance of gels and creams as well.
• the inventors have discovered that the feel and appearance of oil-in-water cosmetics can be improved by combining specific materials.
• the present invention is based on this finding.
• the component (A) is represented by the following formula (a): (Wherein, R a1 , R a2 and R a4 each independently represent a hydrocarbon group having 2 to 4 carbon atoms; R a3 is a hydrocarbon group having 1 to 10 carbon atoms which may have a urethane bond, R a5 is a hydrocarbon group having 8 to 36 carbon atoms; a1 is an integer from 1 to 500, a2 is an integer from 1 to 200, a3 is an integer of 1 or more, a4 is an integer of 2 or more.
• the present invention provides a water-soluble cosmetic that is less sticky and has an excellent feel when used. Furthermore, when the viscosity of this cosmetic is relatively high, it can also achieve an appearance with a plump, textured feel.
• the oil-in-water cosmetic composition comprises: (A) hydrophobically modified polyether urethane, (B) a carboxyvinyl polymer, (C) polyoxyalkylene-modified silicone, (D) oil, (E) an aqueous component selected from a monohydric alcohol and a dihydric alcohol, and (F) water.
• A hydrophobically modified polyether urethane
• B a carboxyvinyl polymer
• C polyoxyalkylene-modified silicone
• D oil
• E an aqueous component selected from a monohydric alcohol and a dihydric alcohol
• F water
• the cosmetic preparation according to the present invention comprises a hydrophobically modified polyether urethane (hereinafter, sometimes referred to as component (A)).
• component (A) is a material also known as an associative thickener or associative polymer, and produces a thickening effect by the association of hydrophobic groups in the molecule with hydrophobic groups of other molecules.
• Such an associative thickener can be arbitrarily selected from conventionally known thickeners, but is preferably one represented by the following formula (a): (Wherein, R a1 , R a2 and R a4 each independently represent a hydrocarbon group having 2 to 4 carbon atoms, preferably a saturated hydrocarbon group having 2 to 4 carbon atoms; R a3 is a hydrocarbon group having 1 to 10 carbon atoms which may have a urethane bond, R a5 is a hydrocarbon group having 8 to 36 carbon atoms, preferably a hydrocarbon group having 12 to 24 carbon atoms; a1 is an integer from 1 to 500, preferably an integer from 100 to 300; a2 is an integer from 1 to 200, preferably an integer from 10 to 100; a3 is an integer of 1 or more, preferably 1; a4 is an integer of 2 or more, preferably 2.
• component (A) is polyethylene glycol-decyltetradeceth-hexamethylene diisocyanate copolymer.
• a particularly preferred example is hydrophobically modified polyether urethane with the INCI name "(PEG-240/Decyltetradeceth-20/HDI) Copolymer (PEG-240/HDI COPOLYMER BISDECYLTETRADECETH-20 ETHER)." This copolymer is commercially available from ADEKA Corporation under the trade name "ADEKA NOL GT-700.”
• the amount of component (A) contained in the cosmetic is not particularly limited, but the amount of component (A) based on the total mass of the cosmetic is preferably 0.5 to 3 mass%, and more preferably 0.8 to 2 mass%.
• the cosmetic according to the present invention may further include a carboxyvinyl polymer (hereinafter, sometimes referred to as component (B)).
• a carboxyvinyl polymer is generally used as a thickener for cosmetics, and is a polymer containing acrylic acid as a monomer unit.
• Such a carboxyvinyl polymer is generally commercially available, and is sold under the names of Hiviswako (trade name, manufactured by Wako Pure Chemical Industries, Ltd.), Sintaren (trade name, manufactured by 3V SIGMA), Carbopol (trade name, manufactured by Goodrich Co., Ltd.), etc.
• Component (B) is a crosslinked polymer having a chemically crosslinked structure, and has a high thickening effect.
• component (A) and component (B) in combination, the stickiness of the cosmetic can be suppressed, the feeling of use can be improved, and in the case of a cosmetic having a high viscosity, an excellent aesthetic appearance can be realized.
• a carboxyvinyl polymer in which the carboxyl group is not modified is preferably used, but a modified one such as an alkyl-modified carboxyvinyl polymer can also be used if necessary.
• the amount of component (B) contained in the cosmetic is not particularly limited, but the amount of component (B) based on the total mass of the cosmetic is preferably 0.02 to 1 mass%, and more preferably 0.05 to 0.5 mass%.
• the cosmetic composition according to the present invention is a water-soluble silicone surfactant in which some of the methyl groups of dimethicone are replaced with polyethylene glycol, and the polyoxyalkylene-modified silicone (hereinafter sometimes referred to as component (C)) is represented by the following general formula (c), which is widely used in the field of cosmetics due to its excellent emulsifying, dispersing and penetrating properties.
• Each R c1 is independently a hydrogen atom or an alkyl group having 1 to 6 carbon atoms;
• Each R c2 independently represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or a group represented by the formula (c0): -(CH 2 ) a -(C 2 H 4 O) b -(C 3 H 6 O) c -R c3 (c0)
• R c3 is hydrogen or an alkyl group having 1 to 6 carbon atoms; a is an integer from 1 to 6; b is an integer from 0 to 50; c is an integer from 0 to 50; b+c is at least 5.
• R c2 is the polyoxyalkylene group
• m is an integer from 1 to 200
• n is an integer from 0 to 50. It is preferable that the formula is represented by the following formula:
• PEG-12 dimethicone where c is 0 and b is 12 in formula (c0), is particularly preferred.
• Commercially available PEG-12 dimethicone products include DOWSIL ES-5373 (manufactured by Dow Toray), SH3772M, SH3773M, SH3775M (all manufactured by Dow Corning Silicones), and IM-22 (manufactured by Wacker Chemical).
• the amount of component (C) contained in the cosmetic is not particularly limited, but it is preferable that the amount of component (C) is 0.05 to 5 mass%, and more preferably 0.5 to 3 mass%, based on the total mass of the cosmetic.
• the total content of components (A) and (C) is 0.6 to 3 mass% based on the total mass of the cosmetic.
• the cosmetic composition according to the present invention contains an oil (hereinafter sometimes referred to as component (D)).
• Component (D) may be a non-polar oil or a polar oil.
• Specific examples of the oil used as component (D) include: Silicone oils (e.g., dimethylpolysiloxane, diphenylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, decamethylcyclohexasiloxane, amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, fluorine-modified polysiloxane, etc.); Hydrocarbon oils (e.g., liquid paraffin, ozokerite, squalane, petrolatum, microcrystalline wax, etc.); Ester oils (e.g., isopropyl myristate, cetyl octanoate,
• the amount of component (D) contained in the cosmetic is not particularly limited, but the amount of component (D) based on the total mass of the cosmetic is preferably 3 to 30 mass%, and more preferably 5 to 20 mass%.
• the cosmetic preparation according to the present invention contains, in addition to water, an aqueous component that forms an aqueous layer, which is selected from a monohydric alcohol and a dihydric alcohol (hereinafter, sometimes referred to as component (E)).
• an aqueous component that forms an aqueous layer which is selected from a monohydric alcohol and a dihydric alcohol (hereinafter, sometimes referred to as component (E)).
• Monohydric alcohols include ethyl alcohol, normal propyl alcohol, isopropyl alcohol, etc., with ethyl alcohol being preferred.
• Dihydric alcohols include 1,3-butylene glycol, dipropylene glycol, etc., with dipropylene glycol being preferred. These alcohols change surfactants containing polyether-modified silicone to be hydrophilic due to their solvent effect. As a result, it is believed that the vesicles formed from components (A) to (C) adhere to the surface of droplets of component (D) in the form of nanodisks, forming a favorable dispersion state.
• the content of the component (E) is not particularly limited, but the appropriate amount varies depending on whether the component (E) is a monohydric alcohol or a dihydric alcohol. Specifically, (i) When the component (E) is a monohydric alcohol alone, its content is 1 to 15% by mass based on the total mass of the cosmetic preparation; (ii) When the component (E) is a dihydric alcohol alone, its content is 1 to 20% by mass based on the total mass of the cosmetic, (iii) When component (E) is a combination of a monohydric alcohol and a dihydric alcohol, the total content thereof is 1 to 45% by mass, preferably 1 to 35% by mass, based on the total mass of the cosmetic.
• the concentration of the monohydric alcohol and the concentration of the dihydric alcohol satisfy the following formula (1). [Monohydric alcohol concentration (mass%)]/15+[dihydric alcohol concentration (mass%)]/20 ⁇ 1 (1)
• the cosmetic preparation according to the present invention further contains water in addition to the above-mentioned components.
• water water used in cosmetics, quasi-drugs, etc. can be used, such as purified water, ion-exchanged water, tap water, etc.
• the cosmetic preparation of the present invention can contain optional components that are usually used in cosmetics and pharmaceuticals.
• the optional components include the following, and one or more of them can be contained as long as the effects of the present invention are achieved.
• the cosmetic composition according to the present invention may contain, for example, a moisturizing agent.
• moisturizing agents include glycerin, xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid, mucoitin sulfate, caronic acid, atelocollagen, cholesteryl-12-hydroxystearate, sodium lactate, bile salts, dl-pyrrolidone carboxylate, short-chain soluble collagen, Rosa roxburghii extract, Achillea millefolium extract, and Melilot extract.
• the above-mentioned dihydric alcohols such as propylene glycol and 1,3-butylene glycol, also have a moisturizing function.
• the cosmetic composition according to the present invention may contain a pH adjuster to suppress irritation when applied to the skin and to improve the stability of the cosmetic composition.
• pH adjusters include buffers such as lactic acid-sodium lactate, citric acid-sodium citrate, and succinic acid-sodium succinate.
• vitamins include vitamins A, B1, B2, B6, C, E and their derivatives, pantothenic acid and its derivatives, biotin, etc.
• ingredients that can be added include, for example, thickeners other than components (A) and (B), surfactants, pH adjusters; sequestering agents (e.g., disodium ethylenediaminetetraacetate); antioxidants (tocopherol, sulfites, pyrosulfites, etc.); water-soluble polymers; sugars; preservatives (phenoxyethanol, ethylparaben, butylparaben, etc.); anti-inflammatory agents (e.g., glycyrrhizinic acid derivatives, glycyrrhetinic acid derivatives, salicylic acid derivatives, hinokitiol, zinc oxide, allantoin, etc.
• sequestering agents e.g., disodium ethylenediaminetetraacetate
• antioxidants tocopherol, sulfites, pyrosulfites, etc.
• water-soluble polymers e.g., glycyrrhizi
• whitening agents other than lily of the valley e.g., placenta extract, saxifrage extract, arbutin, etc.
• various extracts e.g., Phellodendron bark, Coptis japonica, Lithospermum root, Peony root, Swertia japonica, Birch, Sage, Loquat, Carrot, Aloe, Mallow, Iris, Grape, Coix seed, Loofah, Lily, Saffron, Cnidium rhizome, Angelica acutiloba, Hypericum perforatum, Ononis, Garlic, Capsicum annuum, Tangerine peel, Angelica acutiloba, Seaweed, etc.), activators (e.g., Royal jelly, photosensitizers, cholesterol derivatives, etc.), etc.
• Royal jelly e.g., Royal jelly, photosensitizers, cholesterol derivatives, etc.
• the cosmetic product according to the present invention is not particularly limited in its formulation, and may take the form of a liquid, emulsion, cream, gel, solid, or the like. However, when it is in a cream or gel form with a relatively high viscosity, its appearance tends to be excellent. From this perspective, the viscosity measured at 30°C using a B-type rotational viscometer is preferably 10,000 mPa ⁇ s or more, and more preferably 25,000 mPa ⁇ s or more.
• the present invention provides a water-soluble cosmetic that is less sticky and has an excellent feel when used. Furthermore, when the viscosity of this cosmetic is relatively high, it can also achieve an appearance with a textured feel.
• Viscosity The viscosity was measured using a Brookfield viscometer at 30° C. and a rotation speed of 10 rpm, and was evaluated according to the following criteria.

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Citations (2)

• 2023
  • 2023-12-01 JP JP2024565732A patent/JPWO2024135287A1/ja active Pending
  • 2023-12-01 CN CN202380081067.XA patent/CN120265274A/zh active Pending
  • 2023-12-01 WO PCT/JP2023/043036 patent/WO2024135287A1/ja not_active Ceased

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