WO2012133685A1 - 油中水型乳化化粧料 - Google Patents
油中水型乳化化粧料 Download PDFInfo
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- WO2012133685A1 WO2012133685A1 PCT/JP2012/058434 JP2012058434W WO2012133685A1 WO 2012133685 A1 WO2012133685 A1 WO 2012133685A1 JP 2012058434 W JP2012058434 W JP 2012058434W WO 2012133685 A1 WO2012133685 A1 WO 2012133685A1
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- oil
- component
- water
- hydrogenated polyisobutene
- feeling
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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
- A61K8/04—Dispersions; Emulsions
- A61K8/06—Emulsions
- A61K8/064—Water-in-oil emulsions, e.g. Water-in-silicone emulsions
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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
- 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
- A61K8/31—Hydrocarbons
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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
- A61K8/18—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
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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
- A61K8/18—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
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- 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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/10—General cosmetic use
Definitions
- the present invention relates to a water-in-oil emulsified cosmetic, and more particularly, to a water-in-oil emulsified cosmetic that is excellent in a feeling of elasticity and also has a moisturizing effect and a feeling of use.
- the emulsified compositions are roughly classified into an oil-in-water type (O / W) and a water-in-oil type (W / O), and further, an oil-in-water type (O / W / O), a water-in-oil-in-water type ( There are also multiple types such as (W / O / W). These have been used in the cosmetics field for skin care creams, emulsions, hair care creams, and the like. Among them, water-in-oil emulsified cosmetics with an oil phase as the outer phase and an aqueous phase as the inner phase efficiently deploys oil-soluble active ingredients such as emollient oil, oil-soluble drugs, and UV absorbers on the skin. Since it is possible, it is a dosage form suitable as a cosmetic, and is superior to the oil-in-water type in this respect.
- a skin cosmetic containing hydrogenated polyisobutene is known (Patent Document 4).
- this skin cosmetic is an oil-in-water emulsified cosmetic and is not satisfactory in the feeling of stickiness.
- the present invention has been made in view of the above-mentioned problems of the prior art, and an object thereof is to provide a water-in-oil emulsified cosmetic that is very excellent in the feeling of elasticity and the moisturizing effect.
- the water-in-oil emulsified cosmetic according to the present invention includes the following (A) to (D): The ratio of the component (b1) to the component (A) and the component (B) is 45 to 85%.
- the component (B) includes an oil component (b2) having a viscosity of less than 1000 mPa ⁇ s, (B2) It is suitable that the compounding quantity of a component is 2 times or less of the compounding quantity of (A) component.
- a water-in-oil emulsified cosmetic according to the present invention is a cosmetic containing hydrogenated polyisobutene, an oil containing a volatile oil having low compatibility with the hydrogenated polyisobutene, an emulsifier, and an aqueous component. It is possible to provide a water-in-oil emulsified cosmetic that is excellent in feeling and excellent in moisturizing effect and usability.
- the water-in-oil emulsified cosmetic according to the present invention comprises (A) hydrogenated polyisobutene, (B) (b1) an oil component containing a volatile oil component having low compatibility with hydrogenated polyisobutene, (C) an emulsifier, D) It is composed of an aqueous component.
- A hydrogenated polyisobutene
- B (b1) an oil component containing a volatile oil component having low compatibility with hydrogenated polyisobutene
- C an emulsifier
- D It is composed of an aqueous component.
- Hydrogenated polyisobutene is a hydrocarbon mixture obtained by copolymerizing isobutene and n-butene followed by hydrogenation.
- hydrogenated polyisobutene used in the present invention those generally used in cosmetics can be used.
- the hydrogenated polyisobutene preferably has a number average molecular weight of 1500 to 5000, particularly preferably a number average molecular weight of 1500 to 3000. If the number average molecular weight is too low, the feeling of elasticity may not be sufficient. Further, if the number average molecular weight is too large, the feeling of use may be affected, for example, the spread becomes heavy.
- the amount of (A) hydrogenated polyisobutene in the water-in-oil emulsified cosmetic according to the present invention needs to be 0.5 to 10% by mass relative to the total amount of the cosmetic.
- the compounding quantity of a component is 1 mass% or more. When the blending amount is less than 0.5% by mass, the feeling of elasticity and the moisturizing effect cannot be obtained sufficiently. Moreover, it is preferable that the compounding quantity of (A) component is 8 mass% or less, and it is especially preferable that it is 5 mass% or less. When the blending amount exceeds 10% by mass, the feeling of use such as non-stickiness and softness and the stability are inferior.
- the oil component (B) of the present invention needs to contain a volatile oil component having low compatibility with the component (b1) (A) hydrogenated polyisobutene.
- the oil component having low compatibility with the hydrogenated polyisobutene is an oil component that does not form a uniform transparent layer when the hydrogenated polyisobutene and the target oil component are mixed, heated to 80 ° C., and returned to room temperature. is there.
- the volatile oil component is an oil component having a boiling point of 300 ° C. or less at 1 atmosphere.
- component (b1) examples include decamethylcyclopentasiloxane, decamethyltetrasiloxane, hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, and hexamethyldiethyl.
- Siloxane octamethyltrisiloxane, decamethyltetrasiloxane, dodecamethylpentasiloxane, tetradecamethylhexasiloxane, hexadecamethylheptasiloxane, methyltris (trimethylsiloxy) silane, tetrakis (trimethylsiloxy) silane, perfluoromethylcyclopentane, perfluoromethylcyclopentane Fluorodimethylcyclohexane, methyl perfluorobutyl ether, methyl perfluoroisobutyl ether, ethyl perfluoro Chirueteru, ethyl perfluoro isobutyl ether.
- the blending amount of the volatile oil component having low compatibility with (b1) hydrogenated polyisobutene in the water-in-oil emulsified cosmetic according to the present invention is preferably 6% by mass or more based on the total amount of the cosmetic.
- the content is more preferably at least 13% by mass, and particularly preferably at least 13% by mass.
- the amount of component (b1) is preferably 20% by mass or less, and particularly preferably 18% by mass or less. When there are too many compounding quantities, it may be inferior to stability or a usability
- the water-in-oil emulsified cosmetic of the present invention it is preferable to blend (b2) an oil component having a viscosity of less than 1000 mPa ⁇ s in addition to the component (b1), which is the essential component.
- the viscosity is a value measured with a viscometer at room temperature (25 ° C.) (measurement conditions of the viscometer are BL type, 12 rpm, rotor No. 2).
- the oil component (b2) having a viscosity of less than 1000 mPa ⁇ s include silicone oil, polar oil component, non-polar oil component, and the like.
- silicone oil examples include chain silicone oils such as methylpolysiloxane, methylphenylpolysiloxane, and methylhydrogenpolysiloxane, and cyclic silicone oils.
- polar oils include cetyl octanoate, hexyl laurate, isopropyl myristate, octyl palmitate, isocetyl stearate, isopropyl isostearate, octyl isopalmitate, isodecyl isostearate, 2-ethylhexyl succinate, and diethyl sebacate.
- ester oils examples of the nonpolar oil include hydrocarbon oils such as liquid paraffin, squalane, squalene, paraffin, and isohexadecane.
- the blending amount of the component (b2) is preferably not more than twice the blending amount of the component (A).
- the blending amount of the component (b2) exceeds twice the blending amount of the component (A)
- the (b3) high-viscosity oil component is an oil component selected from the group consisting of solid oils, semi-solid oils, and oil components having a viscosity other than the component (A) of 1000 mPa ⁇ s or more. These oils may be blended alone or in combination of two or more. By containing a high-viscosity oil component, a water-in-oil emulsified cosmetic excellent in feel of elasticity and moisture retention can be obtained. In the present invention, the blending amount of the high-viscosity oil does not affect the stability of the emulsified cosmetic.
- solid oils include, for example, cocoa butter, coconut oil, horse oil, hardened coconut oil, palm oil, beef tallow, sheep fat, hardened castor oil and the like, paraffin wax (linear chain Hydrocarbons), microcrystalline wax (branched saturated hydrocarbons), ceresin wax, mole, montan wax, Fischer-Trops wax and other hydrocarbons, beeswax, carnauba wax, candelilla wax, rice bran wax (rice wax), gay wax, Jojoba oil, nukarou, montan wax, kapok wax, bayberry wax, shellac wax, sugarcane wax, lanolin fatty acid isopropyl, hexyl laurate, reduced lanolin, hard lanolin, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether , Lanolin fatty acid polyethylene glycol, waxes such as POE hydrogenated lanolin alcohol ether, higher fatty acids such as myristic
- Semi-solid oils include, for example, petrolatum, lanolin, shea fat, partially hydrogenated coconut oil and other vegetable fats, partially hydrogenated jojoba oil, bisdiglyceryl polyacyl adipate-2, tetra (behenic acid / benzoic acid / Ethylhexanoic acid) pentaerythrityl, macadamia nut oil polyglyceryl-6-esters behenate, dimer linoleic acid (phytosteryl / behenyl), dipentaerythritol hexaoxystearate and the like.
- oil component having a viscosity other than the component (A) of 1000 mPa ⁇ s or more examples include glyceryl triisostearate, diisostearyl malate, hydrogenated lanolin, and the like.
- the ratio of the component (b1) to the component (A) and the component (B) is preferably 45 to 85%.
- the ratio of the component (b1) to the component (A) and the component (B) is less than 45%, a sufficient feel may not be obtained.
- the ratio of the component (b1) to the component (A) exceeds 85%, the stability and usability may be inferior.
- (C) Emulsifier) (C) What can be normally used for cosmetics can be used for an emulsifier.
- the emulsifier it is particularly preferable to use one having an HLB of 5 or less. If the HLB exceeds 5, the hydrophilicity is high and it may be difficult to obtain a stable water-in-oil emulsified cosmetic.
- emulsifiers include organically modified clay minerals, silicone surfactants, polyhydric alcohol fatty acid ester surfactants, and the like.
- organically modified clay mineral include dimethylalkylammonium hectorite, benzyldimethylstearylammonium hectorite, distearyldimethylammonium chloride-treated aluminum magnesium silicate, and the like.
- silicone surfactants include poly (oxyethylene / oxypropylene) methylpolysiloxane copolymer, polyoxyethylenemethylpolysiloxane copolymer, silicone chain-branched methylpolysiloxane copolymer, and alkyl chain-branched type.
- Polyoxyethylene methyl polysiloxane copolymer, alkyl chain / silicone chain branched polyoxyethylene methyl polysiloxane copolymer, crosslinked polyoxyethylene methyl polysiloxane, alkyl group-containing crosslinked polyoxyethylene methyl polysiloxane, branched Examples include polyglycerin-modified silicone, cross-linked polyglycerin-modified silicone, alkyl group-containing cross-linked polyglycerin-modified silicone, and alkyl group branched polyglycerin-modified silicone.
- polyhydric alcohol fatty acid ester surfactant examples include glycerin fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene glycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, and the like.
- the blending amount of the emulsifier (C) in the water-in-oil emulsified cosmetic according to the present invention is preferably 0.5% by mass or more, particularly preferably 1% by mass or more, based on the total amount of the cosmetic. . When there are too few compounding quantities, it may be inferior to stability.
- the amount of component (C) is preferably 5% by mass or less, and particularly preferably 4% by mass or less. When there are too many compounding quantities, it may be inferior to a usability
- ((D) aqueous component) (D) What can be normally used for cosmetics can mix
- the (D) aqueous component include humectants, water-soluble polymers, ultraviolet absorbers, sequestering agents, antioxidants, and drugs.
- humectant examples include 1,3-butylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, hexylene glycol, glycerin, diglycerin, xylitol, maltitol, maltose, D-mannitol and the like.
- water-soluble polymers include plant polymers such as gum arabic, carrageenan, pectin, agar, quince seed (malmello), starch, and alge colloid (brown algae extract), microbial polymers such as dextran and pullulan, collagen, and casein.
- Animal polymers such as gelatin, starch polymers such as carboxymethyl starch and methylhydroxypropyl starch, alginic acid polymers such as sodium alginate, vinyl polymers such as carboxyvinyl polymer (such as CARBOPOL), polyoxyethylene Polymers, polyoxyethylene polyoxypropylene copolymer polymers, acrylic polymers such as sodium polyacrylate and polyacrylamide, inorganic water-soluble polymers such as bentonite, aluminum magnesium silicate, and laponite And the like.
- alginic acid polymers such as sodium alginate
- vinyl polymers such as carboxyvinyl polymer (such as CARBOPOL)
- polyoxyethylene Polymers such as polyoxyethylene polyoxypropylene copolymer
- acrylic polymers such as sodium polyacrylate and polyacrylamide
- inorganic water-soluble polymers such as bentonite, aluminum magnesium silicate, and laponite And the like.
- UV absorbers examples include benzoic acid UV absorbers such as paraaminobenzoic acid, anthranilic acid UV absorbers such as methyl anthranilate, salicylic acid UV absorbers such as octyl salicylate and phenyl salicylate, isopropyl paramethoxycinnamate, Cinnamic acid UV absorbers such as octyl paramethoxycinnamate and glyceryl di-2-methoxycinnamate mono-2-ethylhexanoate, 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy Benzophenone ultraviolet absorbers such as -4-methoxybenzophenone-5-sulfonic acid, urocanic acid, 2- (2′-hydroxy-5′-methylphenyl) benzotriazole, 4-tert-butyl-4′-methoxybenzoylmethane Etc.
- benzoic acid UV absorbers such as paraaminobenz
- Examples of the sequestering agent include sodium edetate, sodium metaphosphate, phosphoric acid and the like.
- examples of the antioxidant include ascorbic acid, ⁇ -tocopherol, dibutylhydroxytoluene, butylhydroxyanisole and the like.
- the drugs include vitamin A oil, retinol, retinol palmitate, inosit, pyridoxine hydrochloride, benzyl nicotinate, nicotinamide, nicotinic acid dl- ⁇ -tocopherol, ascorbic acid magnesium phosphate, ascorbic acid 2-glucoside, vitamin D2 ( Ergocassipherol), dl- ⁇ -tocopherol 2-L ascorbic acid phosphate diester potassium salt, dl- ⁇ -tocopherol, acetic acid dl- ⁇ -tocopherol, pantothenic acid, biotin and other vitamins, allantoin, azulene and other anti-inflammatory Agents, arbutin, 4-methoxysalicylic acid or salts thereof, whitening agents such as tranexamic acid or derivatives thereof, astringents such as zinc oxide and tannic acid, sulfur, lysozyme chloride, pyridoxine hydrochloride, ⁇
- the blending amount of the (D) aqueous component of the water-in-oil emulsified cosmetic according to the present invention needs to be 60 to 90% by mass with respect to the total amount of the cosmetic.
- the compounding quantity of a component is 65 mass% or more.
- the blending amount is less than 60% by mass, separation or precipitation of hydrogenated polyisobutene occurs, or the cosmetic feel is inferior.
- the compounding quantity of (D) component is 85 mass% or less. If the blending amount exceeds 90% by mass, the stability is poor.
- the outer phase (oil phase) of the water-in-oil emulsified cosmetic of the present invention it is preferable that (A) hydrogenated polyisobutene is dispersed in the component (b1) which is a continuous phase.
- the component (A) has low compatibility with the component (b1), in the emulsified cosmetic of the present invention having a large amount of the inner aqueous phase as described above, the component (A) is contained in the component (b1). Stable fine dispersion can be achieved without separation.
- the water-in-oil emulsified cosmetic according to the present invention can be widely applied to cosmetics conventionally applied to the outer skin.
- cosmetics conventionally applied to the outer skin.
- products such as whitening serum, milky lotion, cream, pack, foundation, lipstick, eye shadow, eyeliner, mascara, facial cleanser, spray, mousse, hair rinse, shampoo and the like can be mentioned.
- the present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto.
- the blending amount is expressed in mass% with respect to the system in which the component is blended. Prior to the description of the examples, the evaluation method of the test used in the present invention will be described.
- Evaluation (1) Dispersion stability The appearance of the sample one week after preparation was visually evaluated. A: No separation of oil was observed. B: Oil separated and precipitation was observed. C: Oil separated and precipitation was observed within 1 week.
- Evaluation (2) Feeling feeling Ten professional panelists applied samples to their faces and evaluated the feeling of use during application.
- a * Nine or more of 10 panelists answered that they had a feeling of elasticity.
- Evaluation (3) Stability The stability was evaluated by comparing the hardness and appearance of the samples stored at 25 ° C. and 40 ° C. for one month with those immediately after preparation.
- a * Under any storage conditions, the decrease in hardness was 10% or less, and no change in appearance was observed.
- B * No change in appearance was observed under any storage conditions, but a hardness decrease of 10% or more was observed.
- B Some separation of water or oil was observed in appearance.
- C Separation of water or oil was observed in appearance within 1 month.
- Evaluation (4) No stickiness Ten professional panelists applied samples to their faces and evaluated the feeling of use during application. A * : 9 or more of 10 panelists answered that there was no stickiness. A: 7 to 10 out of 10 panelists answered that there was no stickiness. B: 5 to less than 7 out of 10 panelists answered that there was no stickiness. C: Less than 5 out of 10 panelists answered that there was no stickiness.
- Evaluation (5) Softness Ten professional panels applied samples to their faces and evaluated the feeling of use during application. A * : Nine or more of 10 panelists answered that their skin was soft. A: 7 to 10 out of 10 panelists answered that their skin was soft. B: 5 to less than 7 out of 10 panelists answered that the skin was soft. C: Less than 5 out of 10 panelists answered that the skin was soft.
- Evaluation (6) Moisturizing effect
- a * Nine or more of the 10 panelists answered that there was a moisturizing effect.
- the inventors of the present invention have studied the feeling of elasticity using hydrogenated polyisobutene (deodorized polybutene P 200SH (manufactured by Nikko Rika Co., Ltd.), number average molecular weight 3000) as a polymer having high adhesion to the skin and having a feeling of elasticity. Went. Hydrogenated polyisobutene has a high viscosity at room temperature (melting point: about 30 ° C.), so it is difficult to blend it alone in cosmetics. For this reason, the cosmetics shown in Table 1 below were produced, in which hydrogenated polyisobutene and various additional oils were blended. Each sample was evaluated for the evaluation items (1) and (2) according to the above scoring criteria. The results are shown in Table 1.
- compatibility (* 1) represents the compatibility between hydrogenated polyisobutene and oil. That is, when mixing two kinds of oils composed of hydrogenated polyisobutene and additional oil, heating to 80 ° C. and returning to room temperature, “ ⁇ ” is obtained when a uniform transparent layer is formed, and “X” is not obtained. Evaluating.
- Test Examples 1-1 and 1-2 which are oily cosmetics formulated with an oil (isohexadecane, squalane) that can dissolve a high-viscosity oil (hydrogenated polyisobutene) that is usually blended with hydrogenated polyisobutene, were stable. However, I could't feel the beam.
- Test Examples 1-3 to 1-5 in which hydrogenated polyisobutene and an oil component (decamethylcyclopentasiloxane, decamethyltetrasiloxane, dimethylpolysiloxane) having a low compatibility with the hydrogenated polyisobutene were blended, the hydrogenated polyisobutene precipitated over time. The stability was bad.
- the samples of Test Examples 1-3 and 1-4 in which a volatile oil was blended were very excellent in the feeling of stickiness.
- the present inventors examined the behavior on the skin of an oil component (hydrogenated polyisobutene) having a feeling of elasticity in cosmetics and an additional oil component blended therewith. The results are shown in FIGS.
- decamethylcyclopentasiloxane since decamethylcyclopentasiloxane has low compatibility with hydrogenated polyisobutene, decamethylcyclopentasiloxane, which is a volatile oil, is easily separated and volatilized when applied to the skin. Therefore, it is considered that a large amount of hydrogenated polyisobutene adheres on the skin.
- the non-volatile oil dimethylpolysiloxane
- dimethylpolysiloxane has low compatibility with hydrogenated polyisobutene and is non-volatile. Therefore, when applied on the skin, hydrogenated polyisobutene and dimethylpolysiloxane are non-uniform and are present in a concentrated manner on the skin. It is thought that they adhere and cause unevenness.
- the inventors of the present invention manufactured water-in-oil type emulsified cosmetics (creams) having the composition shown in Table 3 below by a conventional method. Each sample was evaluated for the evaluation items (2) to (6) according to the above scoring criteria. The results are shown in Table 3.
- the oil components represented by squalane, isohexadecane, and methylpolysiloxane that are effective in improving stability and usability are oil components having a viscosity of less than 1000 mPa ⁇ s. It was. Therefore, it is preferable that the water-in-oil emulsified cosmetic according to the present invention includes (b2) an oil having a viscosity of less than 1000 mPa ⁇ s.
- the inventors of the present invention produced water-in-oil emulsified cosmetics (creams) having the blending compositions shown in Tables 4 to 7 below, in which the blending amounts of various oils were changed, by a conventional method. Each sample was evaluated for the evaluation items (2) to (6) according to the above scoring criteria. The results are shown in Tables 4-7.
- Test Examples 4-1 to 4-4 it can be seen that increasing the proportion of squalane increases the stability and feeling of use. Moreover, according to Table 4, it can be seen that the ratio of the volatile oil having low compatibility with the (b1) hydrogenated polyisobutene with respect to the component (A) and the component (B) has an influence on the feeling of elasticity and use. Therefore, the ratio of the volatile oil component having low compatibility with the (b1) hydrogenated polyisobutene to the component (A) and the component (B) needs to be 45 to 85%.
- the compounding amount of the component (b2) is the compounding component of the component (A).
- the compounding quantity of (b2) component is 2 times or less of the compounding quantity of (A) component.
- the water-in-oil emulsified cosmetic according to the present invention preferably further includes (b3) a high-viscosity oil component typified by petrolatum.
- the samples of Test Examples 7-2 to 7-4, in which the component (A) was appropriately blended were excellent in stickiness, and were excellent in stability and use feeling. Therefore, the blending amount of (A) hydrogenated polyisobutene in the water-in-oil emulsified cosmetic according to the present invention needs to be 0.5 to 10% by mass.
- the inventors of the present invention manufactured water-in-oil emulsified cosmetics (creams) having the composition shown in Table 8 below, which were blended with various emulsifiers, by a conventional method.
- the oil-in-water emulsified cosmetic of Test Example 8-5 below was also produced by a conventional method. Each sample was evaluated for the evaluation items (2) to (6) according to the above scoring criteria. The results are shown in Table 8.
- emulsifier (C) in the water-in-oil emulsified cosmetic of the present invention can be used.
- the sample of Test Example 8-5 which was an oil-in-water emulsified cosmetic, was inferior in the feeling of stickiness. Therefore, the emulsified cosmetic of the present invention needs to be a water-in-oil emulsion.
- the following is a formulation example of the water-in-oil emulsified cosmetic of the present invention.
- the present invention is not limited by this formulation example.
- Formulation Example 1 Cream (1) Glycerin 5% by mass (2) Sodium chloride 0.5 (3) Water residue (4) Disteardimonium hectorite 1.7 (5) Polyoxyethylene / methylpolysiloxane copolymer 0.5 (6) Decamethyltetrasiloxane 10 (7) Squalane 2 (8) Cetyl ethylhexanoate 2 (9) Vaseline 0.5 (10) Hydrogenated polyisobutene 2.5 (B1) amount / (A) + (B) amount: 58.8% (Manufacturing method) (4) to (10) are heated and mixed to uniformly disperse the oil phase. The aqueous phase added with (1) to (3) is mixed.
- the heated aqueous phase was gradually added to the oil phase, and after uniformly dispersing with a homodisper, the emulsified particles were prepared and cooled with stirring to produce a cream which is a water-in-oil emulsified cosmetic.
- the obtained W / O type cream had a good stability and a feeling of use with an excellent feel.
- Formulation Example 2 Cream (1) Glycerin 5% by mass (2) Sodium chloride 0.5 (3) Water residue (4) Disteardimonium hectorite 1.7 (5) Polyoxyethylene / methylpolysiloxane copolymer 0.5 (6) Decamethyltetrasiloxane 13 (7) Liquid paraffin 4 (8) Methylphenylpolysiloxane 2 (9) Bisdiglyceryl polyacyl adipate-2 1 (10) Hydrogenated polyisobutene 4 (B1) amount / (A) + (B) amount: 54.2% (Manufacturing method) (4) to (10) are heated and mixed to uniformly disperse the oil phase. The aqueous phase added with (1) to (3) is mixed.
- the heated aqueous phase was gradually added to the oil phase, and after uniformly dispersing with a homodisper, the emulsified particles were prepared and cooled with stirring to produce a cream which is a water-in-oil emulsified cosmetic.
- the obtained W / O type cream had a good stability and a feeling of use with an excellent feel.
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Abstract
Description
その中でも油相を外相、水相を内相とした油中水型乳化化粧料は、油溶性の有効成分、例えばエモリエント油、油溶性の薬剤、紫外線吸収剤等を効率的に皮膚上に展開できることから、化粧料として適した剤型であり、この点において水中油型よりも優れている。
従来、はり感を付与する物質としては、高分子等が用いられている。例えば、ポリアスパラギン酸塩(特許文献1)や、ポリビニルアルコール(特許文献2)を用いることにより、はり感を有する油中水型乳化組成物が知られている。また、ステアリン酸ステアリルと、水添ポリイソブテン等の炭化水素を併用することにより、はり感を有する乳化化粧料も知られている(特許文献3)。
しかし、保湿効果や他の使用感効果を出すために配合される保湿剤や油分により、はり感が弱まってしまう場合があった。
また、水添ポリイソブテンを配合した皮膚化粧料が知られている(特許文献4)。しかし、この皮膚化粧料は、水中油型乳化化粧料であって、はり感に満足できるものではなかった。
(A)成分および(B)成分に対する(b1)成分の割合が、45~85%であることを特徴とする。
(A)水添ポリイソブテン 0.5~10質量%
(B)(b1)を含む油分
(b1)(A)と相溶性が低い揮発性油分
(C)乳化剤
(D)水性成分 60~90質量%
(b2)成分の配合量が、(A)成分の配合量の2倍以下であることが好適である。
以下、各成分について詳述する。
(A)水添ポリイソブテンは、イソブテンとn-ブテンとを共重合した後に水素添加して得られる炭化水素混合物である。本発明に用いられる水添ポリイソブテンは、化粧料に一般に用いられているものを使用することができる。
本発明の(B)油分には、(b1)成分である(A)水添ポリイソブテンと相溶性が低い揮発性油分を含むことが必要である。
ここで、水添ポリイソブテンと相溶性が低い油分とは、水添ポリイソブテンと対象の油分とを混合し、80℃に加熱して室温に戻した場合に、均一な透明層にならない油分のことである。また、揮発性油分とは、1気圧での沸点が300℃以下の油分のことである。
このような(b2)粘度が1000mPa・s未満の油分としては、例えば、シリコーン油、極性油分、非極性油分等が挙げられる。
極性油分としては、例えば、オクタン酸セチル、ラウリン酸ヘキシル、ミリスチン酸イソプロピル、パルミチン酸オクチル、ステアリン酸イソセチル、イソステアリン酸イソプロピル、イソパルミチン酸オクチル、イソステアリン酸イソデシル、コハク酸2-エチルヘキシル、セバシン酸ジエチルなどのエステル油等が挙げられる。
非極性油分としては、例えば、流動パラフィン、スクワラン、スクワレン、パラフィン、イソヘキサデカン等の炭化水素油等が挙げられる。
本発明において、(b3)高粘度油分とは、固形油、半固形油、(A)成分以外の粘度が1000mPa・s以上の油分からなる群より選択される油分のことである。これらの油分は、単独で配合しても、2種類以上配合しても良い。
高粘度油分を含むことにより、はり感や保湿効果により優れた油中水型乳化化粧料を得ることができる。なお、本発明において、高粘度油分の配合量は、乳化化粧料の安定性に影響を及ぼさない。
(C)乳化剤は、化粧料に通常使用可能なものを用いることができる。
乳化剤としては、特に、HLBが5以下のものを用いることが好ましい。HLBが5を超えるものでは親水性が高く、安定な油中水型乳化化粧料を得るのが難しい場合がある。
なお、上記HLBの値は、HLB=7+11.7・log(MW/MO)(ただし、MWは親水基部の分子量を表し、MOは親油基部の分子量を表す)で表される川上式により算出することができる。
有機変性粘土鉱物としては、例えば、ジメチルアルキルアンモニウムヘクトライト、ベンジルジメチルステアリルアンモニウムヘクトライト、塩化ジステアリルジメチルアンモニウム処理ケイ酸アルミニウムマグネシウム等が挙げられる。
(D)水性成分は、化粧料に通常使用可能なものを、乳化物の安定性を損なわない範囲で配合することができる。
このような(D)水性成分としては、例えば、保湿剤、水溶性高分子、紫外線吸収剤、金属イオン封鎖剤、酸化防止剤、薬剤等が挙げられる。
水溶性高分子としては、アラビアゴム、カラギーナン、ペクチン、カンテン、クインスシード(マルメロ)、デンプン、アルゲコロイド(褐藻エキス)等の植物系高分子、デキストラン、プルラン等の微生物系高分子、コラーゲン、カゼイン、ゼラチン等の動物系高分子、カルボキシメチルデンプン、メチルヒドロキシプロピルデンプン等のデンプン系高分子、アルギン酸ナトリウム等のアルギン酸系高分子、カルボキシビニルポリマー(CARBOPOLなど)等のビニル系高分子、ポリオキシエチレン系高分子、ポリオキシエチレンポリオキシプロピレン共重合体系高分子、ポリアクリル酸ナトリウム、ポリアクリルアミド等のアクリル系高分子、ベントナイト、ケイ酸アルミニウムマグネシウム、ラポナイト等の無機系水溶性高分子等が挙げられる。
金属イオン封鎖剤としては、エデト酸ナトリウム塩、メタリン酸ナトリウム、リン酸等が挙げられる。
酸化防止剤としては、アスコルビン酸、α-トコフェロール、ジブチルヒドロキシトルエン、ブチルヒドロキシアニソール等が挙げられる。
また、上記薬剤は遊離の状態で使用されるほか、造塩可能なものは酸または塩基の塩の型で、またカルボン酸基を有するものはそのエステルの形で使用することができる。
(A)成分は、(b1)成分とは相溶性が低いけれども、上記のように内水相の配合量が多い本発明の乳化化粧料中では、(b1)成分中に(A)成分が分離することなく、安定に微分散することができる。
実施例の説明に先立ち本発明で用いた試験の評価方法について説明する。
調製1週間後の試料の外観を、目視により評価した。
A:油の分離は認められなかった。
B:油が分離し、沈殿が認められた。
C:1週間以内に、油が分離し、沈殿が認められた。
専門パネル10名が顔に試料を塗布し、塗布時の使用感を評価した。
A*:パネル10名中9名以上がはり感があると回答した。
A:パネル10名中7名以上9名未満がはり感があると回答した。
B:パネル10名中5名以上7名未満がはり感があると回答した。
C:パネル10名中5名未満がはり感があると回答した。
25℃および40℃で1ヶ月保存した試料の硬度および外観を、調製直後と比較し安定性を評価した。
A*:どの保存条件でも、硬度の低下が10%以下であり、外観の変化は認められなかった。
A:どの保存条件でも、外観の変化は認められなかったが、40℃で保存したもののみ10%以上の硬度低下が認められた。
B*:どの保存条件でも、外観の変化は認められなかったが、10%以上の硬度低下が認められた。
B:外観において、水または油の分離が若干認められた。
C:1ヶ月以内に、外観において水または油の分離が認められた。
専門パネル10名が顔に試料を塗布し、塗布時の使用感を評価した。
A*:パネル10名中9名以上がべたつきがないと回答した。
A:パネル10名中7名以上9名未満がべたつきがないと回答した。
B:パネル10名中5名以上7名未満がべたつきがないと回答した。
C:パネル10名中5名未満がべたつきがないと回答した。
専門パネル10名が顔に試料を塗布し、塗布時の使用感を評価した。
A*:パネル10名中9名以上が肌がやわらかいと回答した。
A:パネル10名中7名以上9名未満が肌がやわらかいと回答した。
B:パネル10名中5名以上7名未満が肌がやわらかいと回答した。
C:パネル10名中5名未満が肌がやわらかいと回答した。
専門パネル10名が顔に試料を塗布し、塗布時の使用感を評価した。
A*:パネル10名中9名以上が保湿効果があると回答した。
A:パネル10名中7名以上9名未満が保湿効果があると回答した。
B:パネル10名中5名以上7名未満が保湿効果があると回答した。
C:パネル10名中5名未満が保湿効果があると回答した。
このため、水添ポリイソブテンと、各種追加油分を配合した、下記表1に示す化粧料を製造した。そして、各試料を評価項目(1)および(2)について上記採点基準にて評価した。結果を表1に示す。
なお、以下の試験において、「相溶性(*1)」は、水添ポリイソブテンと、油分との相溶性を表す。すなわち、水添ポリイソブテンと追加油分からなる2種類の油分を混合し、80℃に加熱して室温に戻した場合に、均一な透明層になる場合に「○」、ならない場合に「×」と評価している。
また、水添ポリイソブテンと、それと相溶性の低い油分(デカメチルシクロペンタシロキサン、デカメチルテトラシロキサン、ジメチルポリシロキサン)を配合した試験例1-3~1-5は、経時で水添ポリイソブテンが沈殿してしまい、安定性が悪かった。しかし、揮発性の油分を配合した試験例1-3および1-4の試料は、はり感に非常に優れていた。
試験例1-3のように、追加油分として、水添ポリイソブテンと相溶性が低く、揮発性の油分(デカメチルシクロペンタシロキサン)を用いた場合、図2のような挙動を示すと考えた。すなわち、デカメチルシクロペンタシロキサンは水添ポリイソブテンと相溶性が低いため、肌に塗布した際、揮発性油分であるデカメチルシクロペンタシロキサンはただちに分離および揮発しやすくなる。したがって、肌上には多量の水添ポリイソブテンが付着すると考えられる。
試験例1-5のように、追加油分として、水添ポリイソブテンと相溶性が低く、非揮発性の油分(ジメチルポリシロキサン)を用いた場合、図3のような挙動を示すと考えた。すなわち、ジメチルポリシロキサンは水添ポリイソブテンと相溶性が低く、また非揮発性のため、肌上に塗布した際、水添ポリイソブテンとジメチルポリシロキサンは不均一で、それぞれが集まって存在しながら肌へ付着し、むらが生じると考えられる。
すなわち、試験例1-3および1-4のように、水添ポリイソブテンと、それと相溶性が低い揮発性油分を併用することにより、水添ポリイソブテンのはり効果を最大限に発揮できることが明らかとなった。
そこで、本発明者らは、これらの油分を油中水型乳化化粧料に配合し、油相中での水添ポリイソブテンの分離を抑制する試みを行った。
すなわち、本発明者らは、水添ポリイソブテンを配合し、併用する追加油分の種類を変化させた、下記表2に示す配合組成よりなる油中水型乳化化粧料(クリーム)を、常法により製造した。そして、各試料を評価項目(2)~(6)について上記採点基準にて評価した。結果を表2に示す。
一方、水添ポリイソブテンの他に、それと相溶性の高い揮発性の油分(試験例2-2)や、それと相溶性が低い非揮発性の油分(試験例2-3、2-4)を配合した油中水型乳化化粧料は、やはり、はり感に満足できるものではなかった。
また、本発明者らのさらなる検討の結果、試験例2-1において、デカメチルテトラシロキサンの配合量を40質量%に増やした場合、経時で水添ポリイソブテンの分離が認められ、評価項目(3)が「C」になってしまった。したがって、本発明の油中水型乳化化粧料において、(D)水性成分の配合量が60質量%以上であることが必要である。
本発明者らのさらなる検討の結果、安定性や使用感の向上に有効なスクワラン、イソヘキサデカン、メチルポリシロキサンに代表される油分は、粘度が1000mPa・s未満の油分であることが明らかになった。
したがって、本発明にかかる油中水型乳化化粧料は、(b2)粘度が1000mPa・s未満の油分を含むことが好ましい。
また、表4によれば、(A)成分および(B)成分に対する(b1)水添ポリイソブテンと相溶性が低い揮発性油分の割合により、はり感や使用感に影響があることがわかる。
したがって、(A)成分および(B)成分に対する(b1)水添ポリイソブテンと相溶性が低い揮発性油分の割合が、45~85%であることが必要である。
したがって、(b2)成分の配合量は、(A)成分の配合量の2倍以下であることが好ましい。
したがって、本発明にかかる油中水型乳化化粧料において、さらに、ワセリンに代表される(b3)高粘度油分を含むことが好ましい。
したがって、本発明にかかる油中水型乳化化粧料の(A)水添ポリイソブテンの配合量は、0.5~10質量%であることが必要である。
しかし、水中油型乳化化粧料とした試験例8-5の試料は、はり感に劣っていた。
したがって、本発明の乳化化粧料は、油中水型乳化物であることが必要である。
(1)グリセリン 5 質量%
(2)塩化ナトリウム 0.5
(3)水 残余
(4)ジステアルジモニウムヘクトライト 1.7
(5)ポリオキシエチレン・メチルポリシロキサン共重合体 0.5
(6)デカメチルテトラシロキサン 10
(7)スクワラン 2
(8)エチルヘキサン酸セチル 2
(9)ワセリン 0.5
(10)水添ポリイソブテン 2.5
(b1)量/(A)+(B)量:58.8%
(製法)
(4)~(10)を加熱混合し、油相の均一分散を行う。(1)~(3)を加えた水相を混合する。加熱した水相を前記油相に徐々に添加し、ホモディスパーで均一分散後、乳化粒子を整え、撹拌しながら冷却し、油中水型乳化化粧料であるクリームを製造した。得られたW/O型クリームは安定性が良好ではり感に優れた使用感を有していた。
(1)グリセリン 5 質量%
(2)塩化ナトリウム 0.5
(3)水 残余
(4)ジステアルジモニウムヘクトライト 1.7
(5)ポリオキシエチレン・メチルポリシロキサン共重合体 0.5
(6)デカメチルテトラシロキサン 13
(7)流動パラフィン 4
(8)メチルフェニルポリシロキサン 2
(9)ビスジグリセリルポリアシルアジペート-2 1
(10)水添ポリイソブテン 4
(b1)量/(A)+(B)量:54.2%
(製法)
(4)~(10)を加熱混合し、油相の均一分散を行う。(1)~(3)を加えた水相を混合する。加熱した水相を前記油相に徐々に添加し、ホモディスパーで均一分散後、乳化粒子を整え、撹拌しながら冷却し、油中水型乳化化粧料であるクリームを製造した。得られたW/O型クリームは安定性が良好ではり感に優れた使用感を有していた。
2 追加油分
3 肌
Claims (2)
- 次の(A)~(D)を含み、
(A)成分および(B)成分に対する(b1)成分の割合が、45~85%であることを特徴とする油中水型乳化化粧料。
(A)水添ポリイソブテン 0.5~10質量%
(B)(b1)を含む油分
(b1)(A)と相溶性が低い揮発性油分
(C)乳化剤
(D)水性成分 60~90質量% - 請求項1に記載の油中水型乳化化粧料において、(B)成分中に(b2)粘度が1000mPa・s未満の油分を含み、
(b2)成分の配合量が、(A)成分の配合量の2倍以下であることを特徴とする油中水型乳化化粧料。
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Also Published As
Publication number | Publication date |
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EP2692329A4 (en) | 2014-11-05 |
TWI507207B (zh) | 2015-11-11 |
RU2013146038A (ru) | 2015-05-10 |
JP5547123B2 (ja) | 2014-07-09 |
RU2574029C2 (ru) | 2016-01-27 |
CN103533918A (zh) | 2014-01-22 |
TW201244744A (en) | 2012-11-16 |
JP2012206985A (ja) | 2012-10-25 |
EP2692329A1 (en) | 2014-02-05 |
EP2692329B1 (en) | 2021-02-17 |
KR20140012691A (ko) | 2014-02-03 |
US20140017191A1 (en) | 2014-01-16 |
CN103533918B (zh) | 2016-09-28 |
KR101959580B1 (ko) | 2019-03-18 |
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