Water-in-oil emulsion composition

Abstract

Disclosed is a water-in-oil emulsion composition that exhibits little color unevenness when being applied, and is easily washed off (removal by soap) using soap after being applied. This composition comprises: (A) a non-cyclic silicone oil; (B) a pigment; (C) a metallic soap; and (D) at least one dispersant selected from the group consisting of bis-butyldimethicone polyglyceryl-3, isostearic acid, sorbitan sesquiisostearate, polyglyceryl-6 polyricinoleate, glyceryl isostearate, and cetyl PEG / PPG-10 / 1 dimethicone. The added amount of the component (A) with respect to the total amount of oil components in the composition is at least 35 mass%.

Description

Water-in-oil emulsion composition REFERENCE TO RELATED APPLICATIONS

[0001] This patent application claims priority to an earlier filed Japanese patent application, Patent Application No. 2023-187077 (filing date: October 31, 2023), the entire disclosure of which is incorporated herein by reference.

[0002] The present invention relates to a water-in-oil emulsion composition.

[0003] Since the water-in-oil emulsion composition has an oil phase in the continuous phase, it is water-resistant, in other words, sweat-resistant, and has long-lasting cosmetic properties, making it suitable for use in liquid foundations and the like.

[0004] For this reason, water-in-oil (W / O) type is the general formula for liquid foundation that provides good makeup wear. However, water-in-oil type liquid foundation often requires dedicated oil cleansing when washing it off, which poses a problem of placing a heavy burden on the skin of the user.

[0005] Furthermore, liquid foundations contain a large amount of coloring material to enhance coverage, but liquid foundations with a large amount of coloring material tend to disperse poorly, which can lead to uneven coloring when applied to the skin.

[0006] In order to solve these problems, research has been conducted into water-in-oil emulsion compositions such as liquid foundations that have excellent effects, and a variety of compositions have been investigated.

[0007] For example, a water-in-oil emulsion makeup cosmetic containing a metal soap-treated metal oxide, an ester oil, a silicone oil, and water as essential ingredients has been reported (Patent Document 1). Such cosmetics show little change in color between immediately after application and 5 minutes after application, and can maintain the freshly applied color for a long period of time.

[0008] As described above, various water-in-oil emulsion compositions such as liquid foundations that have excellent effects have been found, but the effects are not necessarily sufficient, and there is still a demand for water-in-oil emulsion compositions such as liquid foundations that have even better effects.

[0009] JP 2009-269881 A

[0010] The present invention provides a water-in-oil emulsion composition.

[0011] The present inventors have found that a water-in-oil emulsion composition containing a specific dispersant and the like has the excellent effects of causing little color unevenness when applied and being easily washed off with soap (soap-removal) after application. The present invention is based on this finding.

[0012] The present invention provides the following inventions: (1) A water-in-oil emulsion composition comprising (A) an acyclic silicone oil, (B) a pigment, (C) a metal soap, and (D) one or more dispersants selected from the group consisting of bisbutyl dimethicone polyglyceryl-3, isostearic acid, sorbitan sesquiisostearate, polyglyceryl-6 polyricinoleate, glyceryl isostearate, and cetyl PEG / PPG-10 / 1 dimethicone, wherein the amount of component (A) relative to the total amount of oil in the composition is 35% by mass or more. (2) The composition according to (1), wherein the amount of component (A) relative to the total amount of the composition is 10% by mass or more. (3) The composition according to (1) or (2), wherein the amount of component (B) relative to the total amount of the composition is 0.1% by mass or more. (4) The composition according to any one of (1) to (3), wherein component (C) is magnesium stearate. (5) The composition according to any one of (1) to (4), wherein the component (D) is one or more selected from the group consisting of bisbutyldimethicone polyglyceryl-3, isostearic acid, sorbitan sesquiisostearate, and polyglyceryl-6 polyricinoleate. (6) The composition according to any one of (1) to (5), wherein the component (D) comprises bisbutyldimethicone polyglyceryl-3, isostearic acid, and sorbitan sesquiisostearate. (7) The composition according to any one of (1) to (6), comprising component (B) treated with component (C). (8) The composition according to any one of (1) to (7), further comprising an emulsifier (E). (9) The composition according to any one of (1) to (8), wherein the composition is a liquid composition.

[0013] According to the present invention, there is provided a water-in-oil emulsion composition containing a specific dispersant, etc., which has the excellent effects of causing little color unevenness when applied and being easy to wash off with soap after application (soap-removal). By using the water-in-oil emulsion composition of the present invention, it is possible to reduce color unevenness when applied and to make it easy to wash off with soap after application. Specific Description of the Invention

[0014] According to one embodiment of the present invention, there is provided a water-in-oil emulsion composition comprising (A) an acyclic silicone oil, (B) a pigment, (C) a metal soap, and (D) one or more dispersants selected from the group consisting of bisbutyldimethicone polyglyceryl-3, isostearic acid, sorbitan sesquiisostearate, polyglyceryl-6 polyricinoleate, glyceryl isostearate, and cetyl PEG / PPG-10 / 1 dimethicone.

[0015] The component (A) in the water-in-oil emulsion composition of the present invention is acyclic silicone oil.Such acyclic silicone oil includes linear silicone oil and branched silicone oil, and linear silicone oil and branched silicone oil can be used alone or in combination, but preferably in combination.The linear silicone oil in the present invention is not limited as long as it is generally used as a raw material for cosmetics etc., but includes linear amino-modified polysiloxane, linear polyether-modified polysiloxane, linear alkyl-modified polysiloxane (methylpolysiloxane, dimethylpolysiloxane (also called dimethicone), methylphenylpolysiloxane, methylhydrogenpolysiloxane, decamethyltetrasiloxane, etc.), linear fluorine-modified polysiloxane, linear polyoxyethylene-methylpolysiloxane copolymer, etc., and preferably dimethicone. The branched-chain silicone oil used in the present invention is not limited as long as it is one that is commonly used as a raw material for cosmetics, etc., but examples thereof include branched-chain silicone oils such as methyl trimethicone and diphenylsiloxyphenyl trimethicone, with diphenylsiloxyphenyl trimethicone being preferred. Component (A) used in the present invention is preferably liquid at room temperature.

[0016] The water-in-oil emulsion composition of the present invention may contain an oil other than component (A). Such oils are not particularly limited as long as they are generally used as raw materials for cosmetics and the like, and examples thereof include cyclic silicone oils, hydrocarbon oils, ester oils, higher alcohols having 12 to 22 carbon atoms, fatty acids having 12 to 22 carbon atoms, and fats and oils. According to a preferred embodiment of the present invention, the water-in-oil emulsion composition of the present invention does not contain cyclic silicone oils that are generally used as raw materials for cosmetics and the like, such as cyclopentasiloxane, decamethylpolysiloxane, dodecamethylpolysiloxane, and tetramethyltetrahydrogenpolysiloxane.

[0017] Examples of hydrocarbon oils in the present invention include liquid paraffin, squalane, squalene, pristane, paraffin, isoparaffin, hydrogenated polyisobutene, hydrogenated polydecene, and volatile hydrocarbon oils (e.g., isododecane, isohexadecane, undecane, tridecane, etc.).

[0018] Examples of the ester oils in the present invention include ethylhexyl methoxycinnamate, isodecyl neopentanoate, isopropyl myristate, cetyl ethylhexanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid esters, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, glycerin triisostearate, tetraethyl acrylate ... Pentaerythrityl ethylhexanoate, triethylhexanoin (glyceryl tri-2-ethylhexanoate), cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, glycerin trimyristate, tri-2-heptylundecanoic acid glyceride, castor oil fatty acid methyl ester, oleyl oleate, cetostearyl alcohol, acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, N-lauroyl Examples of triester oils include 2-octyldodecyl L-glutamate, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate, polypropylene glycol dipivalate, ethyl acetate, butyl acetate, amyl acetate, and triethyl citrate.

[0019] In the present invention, examples of the higher alcohol having 12 to 22 carbon atoms include oleyl alcohol, 2-decyltetradecynol, dodecanol, isostearyl alcohol, octyldodecanol, etc. Examples of the fatty acid having 12 to 22 carbon atoms include oleic acid, isostearic acid, linoleic acid, linolenic acid, etc.

[0020] Examples of fats and oils in the present invention include cacao butter, avocado oil, camellia oil, macadamia nut oil, corn oil, olive oil, rapeseed oil, sesame oil, persic oil, wheat germ oil, camellia oil, castor oil, linseed oil, safflower oil, cottonseed oil, perilla oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, Chinese tung oil, Japanese tung oil, jojoba oil, germ oil, triglycerin, glycerin trioctanoate, glycerin triisopalmitate, and the like.

[0021] The amount of component (A) in the water-in-oil emulsion composition of the present invention is not particularly limited as long as the amount relative to the total amount of oil in the composition is 35% by mass or more, but is preferably 50% by mass or more, more preferably 60% by mass or more. Also, the amount of component (A) in the water-in-oil emulsion composition of the present invention is preferably 10% by mass or more, more preferably 15% by mass or more, more preferably 20% by mass or more, more preferably 25% by mass or more, relative to the total amount of the composition.

[0022] Component (B) in the water-in-oil emulsion composition of the present invention is a pigment, and such pigment is not limited as long as it is a pigment commonly used as a coloring material, but examples thereof include natural dyes, organic pigments, inorganic pigments, etc., and inorganic pigments are preferred. Examples of such inorganic pigments include titanium oxide, iron oxide (yellow iron oxide, black iron oxide, and red iron oxide), zinc oxide, cerium oxide, aluminum oxide, chromium oxide, chromium hydroxide, etc., and red iron oxide, yellow iron oxide, black iron oxide, and titanium oxide are preferred.

[0023] The amount of component (B) in the water-in-oil emulsion composition of the present invention is preferably 0.1% by mass or more, more preferably 1% by mass or more, more preferably 3% by mass or more, more preferably 5% by mass or more, more preferably 10% by mass or more, more preferably 11% by mass or more, and more preferably 12% by mass or more, relative to the total amount of the composition.

[0024] Component (C) in the water-in-oil emulsion composition of the present invention is a metal soap, and such metal soap is not limited as long as it is one that is commonly used as a raw material for cosmetics, etc., but examples thereof include aluminum stearate, magnesium stearate, zinc myristate, etc., which have residual hydroxyl groups, and magnesium stearate is preferred. Component (C) contained in the water-in-oil emulsion composition of the present invention also includes those derived from pigments that have been treated with a metal soap.

[0025] According to a preferred embodiment of the present invention, the water-in-oil emulsion composition of the present invention comprises component (B) treated with component (C). That is, the water-in-oil emulsion composition of the present invention preferably contains a pigment treated with a metal soap as components (B) and (C).

[0026] Component (D) in the water-in-oil emulsion composition of the present invention is one or more dispersants selected from the group consisting of bisbutyldimethicone polyglyceryl-3, isostearic acid, sorbitan sesquiisostearate, polyglyceryl-6 polyricinoleate, glyceryl isostearate, and cetyl PEG / PPG-10 / 1 dimethicone, preferably one or more dispersants selected from the group consisting of bisbutyldimethicone polyglyceryl-3, isostearic acid, sorbitan sesquiisostearate, and polyglyceryl-6 polyricinoleate, more preferably a dispersant comprising bisbutyldimethicone polyglyceryl-3, isostearic acid, and sorbitan sesquiisostearate. The water-in-oil emulsion composition of the present invention may also contain other dispersants as long as they are commonly used as raw materials for cosmetics, etc.

[0027] The water-in-oil emulsion composition of the present invention may further contain an emulsifier as component (E). This component (E) does not include bisbutyl dimethicone polyglyceryl-3, isostearic acid, sorbitan sesquiisostearate, polyglyceryl-6 polyricinoleate, glyceryl isostearate, cetyl PEG / PPG-10 / 1 dimethicone, or metal soaps, and other components commonly used as emulsifiers for raw materials such as cosmetics can be used as component (E). The component (E) of the present invention may also be one that can be used for purposes other than as an emulsifier, such as a dispersant.

[0028] Therefore, according to one preferred embodiment of the present invention, there is provided a water-in-oil emulsion composition further comprising an emulsifier (E). Component (E) in the present invention is not particularly limited as long as it is an emulsifier commonly used as a raw material for cosmetics and the like, other than bisbutyl dimethicone polyglyceryl-3, isostearic acid, sorbitan sesquiisostearate, polyglyceryl-6 polyricinoleate, glyceryl isostearate, cetyl PEG / PPG-10 / 1 dimethicone, and metal soaps. However, it is preferably a silicone-based emulsifier, more preferably a silicone-based emulsifier with an HLB of 1.5 to 4, and more preferably PEG-10 dimethicone or PEG-9 polydimethylsiloxyethyl dimethicone.

[0029] The water-in-oil emulsion composition of the present invention may further contain, as necessary, optional additive components that are typically incorporated into cosmetics, etc., within the scope of not impairing the effects of the present invention. Examples of such additive components include powders, coating agents, thickeners, drugs, sequestering agents, lower alcohols, polyhydric alcohols, antioxidants, preservatives, fragrances, etc.

[0030] The water-in-oil emulsion composition of the present invention may be any of a liquid, semi-solid, and solid composition, but is preferably a liquid composition.

[0031] The water-in-oil emulsion composition of the present invention may be used as a cosmetic composition. The cosmetic composition in the present invention means a composition used for the purpose of applying makeup.

[0032] The present invention will be specifically described based on the following examples, but the present invention is not limited to these examples. Contents are expressed in mass % unless otherwise specified.

[0033] Compositions of the examples and comparative examples were prepared by conventional methods according to the formulations shown in Tables 1 to 5. In Tables 1 to 5, the blending ratio of each component is expressed in mass %.

[0034] The compositions prepared above were evaluated for color unevenness upon application and ease of washing off with soap (soap removal) after application according to the procedures described below.

[0035] Evaluation of Color Unevenness During Application The color unevenness of the prepared compositions of each Example and Comparative Example was evaluated by visual inspection of the bulk after production according to the following evaluation criteria: <Evaluation criteria> A: No color unevenness was observed B: Color unevenness was barely observed C: Color unevenness was observed

[0036] Evaluation of ease of soap removal after application The prepared compositions of each Example and Comparative Example were applied to the face of five female panels, and then the female panels washed the applied area with ordinary soap (Elixir Superieur Cleansing Foam, manufactured by Shiseido Co., Ltd.), and the ease of soap removal was evaluated according to the following evaluation criteria. <Evaluation criteria> A: 0 panelists answered that the makeup was not easily removed B: 1 to 3 panelists answered that the makeup was not easily removed C: 4 or more panelists answered that the makeup was not easily removed

[0037] The results are shown in Tables 1 to 5.

[0038]

[0039]

[0040]

[0041]

[0042]

[0043] The results in Tables 1 to 5 show that the compositions of Examples 1 to 10 all had little color unevenness when applied and were easy to remove with soap, while the compositions of Comparative Examples 1 to 7 all had color unevenness when applied or were not easy to remove with soap. These results demonstrate that the compositions of the present invention have the excellent effect of having little color unevenness when applied and being easy to remove with soap.

Claims

1. A water-in-oil emulsion composition comprising: (A) an acyclic silicone oil; (B) a pigment; (C) a metal soap; and (D) one or more dispersants selected from the group consisting of bisbutyldimethicone polyglyceryl-3, isostearic acid, sorbitan sesquiisostearate, polyglyceryl-6 polyricinoleate, glyceryl isostearate, and cetyl PEG / PPG-10 / 1 dimethicone, wherein the blending amount of component (A) relative to the total amount of oil in the composition is 35 mass% or more.

2. The composition according to claim 1, wherein the blending amount of said component (A) is 10 mass% or more based on the total amount of said composition.

3. The composition according to claim 1, wherein the amount of said component (B) is 0.1 mass% or more based on the total amount of said composition.

4. The composition according to claim 1, wherein said component (C) is magnesium stearate.

5. The composition according to claim 1, wherein the component (D) is one or more selected from the group consisting of bisbutyldimethicone polyglyceryl-3, isostearic acid, sorbitan sesquiisostearate, and polyglyceryl-6 polyricinoleate.

6. The composition of claim 1, wherein component (D) comprises bisbutyldimethicone polyglyceryl-3, isostearic acid, and sorbitan sesquiisostearate.

7. The composition according to claim 1, comprising component (B) treated with component (C).

8. The composition of claim 1, further comprising (E) an emulsifier.

9. The composition of claim 1, wherein the composition is a liquid composition.

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