JP7433893B2 - Oil-in-water emulsion composition - Google Patents

Description

The present invention relates to oil-in-water emulsion compositions.

2. Description of the Related Art Conventionally, cosmetic-impregnated masks have been widely used, in which a sheet body made of non-woven fabric or the like is impregnated with cosmetics. This cosmetic-impregnated mask covers the face with a sheet body impregnated with cosmetics for a certain period of time, thereby ensuring that the cosmetics come into contact with the user's face and achieving higher beauty effects. It is something.

In the form of a cosmetic-impregnated mask, a cosmetic is supported on one side of a sheet-like support to form an application surface, and a release film made of a plastic film is further laminated on the application surface. It is generally well known that the adhesive is distributed or stored in a protected state, and the peeling film is removed at the time of use to expose the adhesive surface.

In addition, cosmetics are sandwiched between the mating surfaces of two overlapping sheet-like supports, and when the two overlapping supports are separated during use, the cosmetics are exposed on each separated support. A sheet in which an attachment surface is formed is also known (Patent Document 1).

The application surface of the above-mentioned general cosmetic-impregnated mask and the sheet of the embodiment of Patent Document 1 is the part that comes into contact with the user's skin, and the material of the application surface may be natural fibers such as cotton, polyethylene, polypropylene, etc. Polyolefin fibers such as polymethylpentene and ethylene-propylene copolymers, polyester fibers such as polyethylene terephthalate and polybutylene terephthalate, polyamide fibers such as nylon, and synthetic fibers such as acrylic fibers are known.

On the other hand, as the cosmetics impregnated into the sheet body, as described in Patent Document 1, emulsifying bases such as water-soluble bases, oil-in-water emulsifying bases, water-in-oil emulsifying bases, etc. It has been known. As for the cosmetics impregnated into the sheet body, one of the purposes for which the sheet is used is to provide high moisture retention and humidity, and therefore a rich feeling of use tends to be preferred. For this reason, water-in-oil emulsifying bases are often selected among emulsifying bases.

Japanese Patent Application Publication No. 2012-51847

However, since the water-in-oil emulsion base is a base with an oil phase on the outside, depending on the material of the sheet into which the cosmetic is impregnated, the oil of the water-in-oil emulsion base may seep out. There is a problem that it looks bad. Although such problems do not occur with oil-in-water emulsion bases, it is difficult to achieve the same rich feel when using oil-in-water emulsion bases as with water-in-oil emulsion bases. Further, when the sheet-like cosmetic is removed from the face, the cosmetic remains on the face, but if the cosmetic has a white or similar color, it will not look good. For this reason, it is preferable that the cosmetic material to be impregnated is transparent. Furthermore, when blending the remaining cosmetics on the face as described above, it is also important to suppress so-called sagging, which is the appearance of scum due to the relationship with the previously used cosmetics.

The present invention has been made in view of the above problems, and although it is an oil-in-water emulsion composition, it provides a rich feel on use equivalent to that of a water-in-oil emulsion composition, has high transparency, and is resistant to twisting. The object of the present invention is to provide an oil-in-water emulsion composition.

The oil-in-water emulsion composition of the present invention is
(A) an acrylic acid thickener;
(B) a hydrating semi-solid oil;
(C) an associative thickener;
(D) liquid oil;
(D) 50% by mass or more of the entire liquid oil is a water-retaining liquid oil.

(A) The acrylic acid-based thickener is at least one selected from acrylamide/acryloyl dimethyl taurate Na) copolymer, (acryloyl dimethyl taurate ammonium/methacrylic acid beheneth-25) crosspolymer, and acrylic acid/alkyl methacrylate polymer. Preferably.

The oil-in-water emulsion composition of the present invention further includes (E) a humectant such as glycerin, dipropylene glycol, 1,3-butylene glycol, xylitol, maltitol, trimethylglycine, polyethylene glycol 20000, erythritol, and acetylated hyaluronic acid. It may contain at least one selected from acid and hyaluronic acid.

The oil-in-water emulsion composition of the present invention may further contain an oil-soluble drug, and the oil-soluble drug is preferably vitamin E acetate.

In the oil-in-water emulsion composition of the present invention, it is preferable that the monohydric alcohol content is 1% by mass or less based on the total amount of the composition.

The oil-in-water emulsion composition of the present invention is preferably impregnated or supported on a sheet.

The oil-in-water emulsion composition of the present invention is
(A) an acrylic acid thickener;
(B) a hydrating semi-solid oil;
(C) an associative thickener;
(D) liquid oil;
(D) Since 50% by mass or more of the entire liquid oil is a water-retaining liquid oil, although it is an oil-in-water emulsion composition, it has the same rich feel (richness) as a water-in-oil emulsion. It can be obtained, has high transparency, and is resistant to twisting.

The present invention will be explained in detail below.
The oil-in-water emulsion composition of the present invention is
(A) an acrylic acid thickener;
(B) a hydrating semi-solid oil;
(C) an associative thickener;
(D) liquid oil;
(D) 50% by mass or more of the entire liquid oil is a water-retaining liquid oil.
Each component will be explained in detail. In this specification, PEG is an abbreviation for polyethylene glycol, PPG is an abbreviation for polypropylene glycol, POE is an abbreviation for polyoxyethylene, and HDI is an abbreviation for hexamethylene diisocyanate.

(A) Acrylic acid thickener (A) Acrylic acid thickener includes acrylamide/acryloyl dimethyl taurate Na) copolymer, (acryloyl dimethyl taurate ammonium/methacrylic acid beheneth-25) crosspolymer, and acrylic acid/alkyl methacrylate. Preferably, it is at least one selected from polymers. In particular, it is preferable to use a combination of an acrylamide/acryloyl dimethyl taurate (Na) copolymer, an (acryloyl dimethyl taurate ammonium/methacrylic acid beheneth-25) crosspolymer, and an acrylic acid/alkyl methacrylate polymer.

These acrylic acid -based advertisements may be used with commercially available products, as acrylic alumide / acrylyroyl dimethyl taurine sodium) Copolimer (manufactured by Seppic), (acryloyltimethyl taurine monium / metacrille -25) cross polymer. Examples of the acrylic acid/alkyl methacrylate polymer include AristoflexHMB (manufactured by Clariant) and PEMULEN TR-2 POLYMERIC EMULSIFIER (LUBRIZOL ADVANCED MATERIALS, Inc.).

The blending amount of the acrylic acid thickener is preferably 0.1 to 3.0% by mass, more preferably 0.3 to 1.0% by mass, based on the total amount of the composition. When the amount of the acrylic acid thickener is 0.1% by mass or more, emulsion stability can be improved, while when it is 3.0% by mass or less, the sticky feeling can be improved. It is possible to create a feeling of use that is unfamiliar and quick.

(B) Water-retaining semi-solid oil (B) Water-retaining semi-solid oil is a semi-solid oil that has a water-retaining effect that allows the oil itself to hold water. It has the excellent advantage of being able to impart a softening effect. Here, the term "semi-solid oil" refers to an oil that is half solid at 25°C.

From the viewpoint of richness, water-retaining semi-solid oils include macadamia nut oil fatty acid phytosteryl (YOFCO-MAS, manufactured by Nippon Fine Chemical Industry Co., Ltd.), tri(caprylic acid/capric acid) glyceryl (CREMERLIN pura-S, CREMER OLEO GmbH & Co. KG) and hydrogenated palm oil (NIKKOL TRIFAT PS-45H, manufactured by Nikko Chemicals Co., Ltd.) can be suitably used.

The amount of water-retaining semi-solid oil (B) is preferably 1.0 to 2.5% by mass, more preferably 1.0 to 2.0% by mass, based on the total amount of the composition. When the amount of water-retaining semi-solid oil is 1.0% by mass or more, it is possible to obtain the desired richness while maintaining transparency, and when it is 2.5% by mass or less, sufficient emulsion stability can be achieved. Obtainable.

(C) Associative thickener The associative thickener (C) used in the present invention has the following general formula (1):
R ¹ -{(O-R ² ) _k -OCONH-R ³ [-NHCOO-(R ⁴ -O) _n -R ⁵ ] _h } _m
[In the formula, R ¹ , R ² and R ⁴ each independently represent a hydrocarbon group, R ³ represents a hydrocarbon group which may have a urethane bond, and R ⁵ represents a linear, branched or secondary represents a hydrocarbon group, fluorocarbon group, alkyl silicone group, aromatic hydrocarbon group, m is an integer of 2 or more, h is an integer of 1 or more, and k and n are each independently 0 to 1000. is an integer in the range of].

By incorporating an associative thickener, a network of associations is established and the viscosity of the aqueous system can be increased.
The hydrophobically modified polyether urethane is represented by the above general formula (1), and in the general formula (1), R ¹ represents a hydrocarbon group, and R ¹ -(OH) _m Preferably, it is a residue of a polyol.

Furthermore, R ² and R ⁴ in the general formula (1) each independently represent a hydrocarbon group, but preferably an alkylene group having 2 to 4 carbon atoms or a phenylethylene group.

Further, R ³ in the general formula (1) represents a hydrocarbon group which may have a urethane bond, but is preferably a residue of a polyisocyanate represented by R ³ -(NCO) _h+1 , and , R ³ -(NCO) _h+1 is preferably a polyisocyanate having a urethane bond obtained by reacting a divalent to octavalent polyol and a divalent to tetravalent polyisocyanate.

In addition, R ⁵ in general formula (1) represents a linear, branched or secondary hydrocarbon group, a fluorocarbon group, an alkyl silicone group, or an aromatic hydrocarbon group; In the case of a hydrocarbon group, the number of carbon atoms is preferably 8 to 36. In the case of a fluorinated carbon group, it is preferably a straight chain, branched chain, and/or secondary fluorinated carbon group having 4 to 24 carbon atoms. Further, in the case of an alkyl silicone group, it is preferably an alkyl silicone having a molecular weight of 200 or more, more preferably a dimethyl silicone having a molecular weight of 500 or more. Further, in the case of an aromatic carbon group, an aromatic carbon group having 10 or more carbon atoms is preferable, and a group selected from cholesterol, cholestanol, phytosterol, phytostanol, and derivatives thereof is more preferable.

The hydrophobically modified polyether urethane of general formula (1) is composed of, for example, one or more polyether polyols represented by R ¹ -[(OR ² ) _k -OH] _m and R ³ -( NCO) obtained by reacting one or more polyisocyanates represented by _h+1 with one or more polymonoalcohols represented by HO-(R ⁴ -O) _n -R ⁵ be able to. In this case, R ¹ to R ⁵ in general formula (2) are R ¹ -[(O-R ² ) _k -OH] _m , R ³ -(NCO) _h+1 , HO-(R ⁴ -O) Determined by _n - R ⁵ . The charging ratio of the three is not particularly limited, but the ratio of hydroxyl groups derived from polyether polyol and polyether monoalcohol to isocyanate groups derived from polyisocyanate is NCO/OH = 0.8:1 to 1.4:1. It is preferable that

The polyether polyol compound represented by R ¹ -[(O-R ² ) _k -OH] _m is a m-valent polyol containing alkylene oxide such as ethylene oxide, propylene oxide, butylene oxide, epichlorohydrin, styrene oxide, etc. It can be made by addition polymerization.

Here, the m-valent polyol is preferably a 2- to 8-valent polyol, such as dihydric alcohols such as ethylene glycol, propylene glycol, butylene glycol, hexamethylene glycol, neopentyl glycol; glycerin, trioxyisobutane, , 2,3-butanetriol, 1,2,3-pentatriol, 2-methyl-1,2,3-propanetriol, 2-methyl-2,3,4-butanetriol, 2-ethyl-1,2 , 3-butanetriol, 2,3,4-pentanetriol, 2,3,4-hexanetriol, 4-propyl-3,4,5-heptanetriol, 2,4-dimethyl-2,3,4-pentane Trihydric alcohols such as triol, pentamethylglycerin, pentaglycerin, 1,2,4-butanetriol, 1,2,4-pentanetriol, trimethylolethane, trimethylolpropane; pentaerythritol, 1,2,3, Tetravalent alcohols such as 4-pentanetetrol, 2,3,4,5-hexanetetrol, 1,2,4,5-pentanetetrol, 1,3,4,5-hexanetetrol; Adnit, Examples include pentahydric alcohols such as arabitol and xylit; hexahydric alcohols such as dipentaerythritol, sorbitol, mannitol and idit; and octahydric alcohols such as sucrose.

Further, R ² is determined by the alkylene oxide, styrene oxide, etc. to be added, and in particular, alkylene oxide or styrene oxide having 2 to 4 carbon atoms is preferred because it is easy to obtain and in order to exhibit excellent effects.

The alkylene oxide, styrene oxide, etc. to be added may be homopolymerized, random polymerization of two or more types, or block polymerization. The method of addition may be any conventional method. Further, the degree of polymerization k is 0 to 1,000, preferably 1 to 500, and more preferably 10 to 50. Further, the proportion of ethylene groups in R ² is preferably 50 to 100% by weight of the total R ² .

Further, the molecular weight of R ¹ -[(O-R ² ) _k -OH] _m is preferably 500 to 100,000, particularly preferably 1,000 to 50,000.

The polyisocyanate represented by R ³ -(NCO) _h+1 is not particularly limited as long as it has two or more isocyanate groups in the molecule. Examples include aliphatic diisocyanates, aromatic diisocyanates, alicyclic diisocyanates, biphenyl diisocyanates, phenylmethane diisocyanates, triisocyanates, and tetraisocyanates.

Examples of aliphatic diisocyanates include methylene diisocyanate, dimethylene diisocyanate, trimethylene diisocyanate, tetramethylene diisocyanate, pentamethylene diisocyanate, hexamethylene diisocyanate, dipropyl ether diisocyanate, 2,2-dimethylpentane diisocyanate, 3-methoxyhexane diisocyanate, Octamethylene diisocyanate, 2,2,4-trimethylpentane diisocyanate, nonamethylene diisocyanate, decamethylene diisocyanate, 3-butoxyhexane diisocyanate, 1,4-butylene glycol dipropyl ether diisocyanate, thiodihexyl diisocyanate, metaxylylene diisocyanate, paraxylylene diisocyanate Examples include diisocyanate and tetramethylxylylene diisocyanate.

Examples of aromatic diisocyanates include metaphenylene diisocyanate, paraphenylene diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, dimethylbenzene diisocyanate, ethylbenzene diisocyanate, isopropylbenzene diisocyanate, tolidine diisocyanate, 1,4-tolylene diisocyanate, Examples include naphthalene diisocyanate, 1,5-naphthalene diisocyanate, 2,6-naphthalene diisocyanate, and 2,7-naphthalene diisocyanate.

Examples of the alicyclic diisocyanate include hydrogenated xylylene diisocyanate and isophorone diisocyanate. As biphenyl diisocyanate, for example,
Examples include biphenyl diisocyanate, 3,3'-dimethylbiphenyl diisocyanate, and 3,3'-dimethoxybiphenyl diisocyanate.

Examples of the diisocyanate of phenylmethane include diphenylmethane-4,4'-diisocyanate, 2,2'-dimethyldiphenylmethane-4,4'-diisocyanate, diphenyldimethylmethane-4,4'-diisocyanate, 2,5,2' , 5'-tetramethyldiphenylmethane-4,4'-diisocyanate, cyclohexylbis(4-isocyontophenyl)methane, 3,3'-dimethoxydiphenylmethane-4,4'-diisocyanate, 4,4'-dimethoxydiphenylmethane- 3,3'-diisocyanate, 4,4'-diethoxydiphenylmethane-3,3'-diisocyanate, 2,2'-dimethyl-5,5'-dimethoxydiphenylmethane-4,4'-diisocyanate, 3,3'- Examples include dichlorodiphenyldimethylmethane-4,4'-diisocyanate and benzophenone-3,3'-diisocyanate.

Examples of the triisocyanate include 1-methylbenzene-2,4,6-triisocyanate, 1,3,5-trimethylbenzene-2,4,6-triisocyanate, 1,3,7-naphthalene triisocyanate, biphenyl -2,4,4'-triisocyanate, diphenylmethane-2,4,4'-triisocyanate, 3-methyldiphenylmethane-4,6,4'-triisocyanate, triphenylmethane-4,4',4'' -triisocyanate, 1,6,11-undecane triisocyanate, 1,8-diisocyanate-4-isocyanate methyloctane, 1,3,6-hexamethylene triisocyanate, bicycloheptane triisocyanate, tris(isocyanate phenyl) thiophosphate, etc. can be mentioned.

Further, these polyisocyanate compounds may be used as dimers or trimers (isocyanurate bonds), or may be reacted with amines and used as biurets. Furthermore, polyisocyanates having urethane bonds obtained by reacting these polyisocyanate compounds with polyols can also be used. The polyol is preferably one having a valence of 2 to 8, and the above-mentioned polyols are preferred. Note that when a polyisocyanate having a valence of 3 or more is used as R ³ -(NCO) _h+1 , a polyisocyanate having this urethane bond is preferable.

The polyether monoalcohol represented by HO-(R ⁴ -O) _n -R ⁵ corresponds to at least two hydrophobic groups separated by a hydrophilic chain part in the hydrophobically modified polyether urethane structure, and has a monovalent It is not particularly limited as long as it is an alcohol polyether.

Such compounds can be obtained, for example, by addition polymerizing ethylene oxide, propylene oxide, butylene oxide, alkylene oxide such as epichlorohydrin, styrene oxide, etc. to a monohydric alcohol.

^R5 , which is a residue of monohydric alcohol, is not particularly limited as long as it is a group that functions as a hydrophobic group in the final hydrophobically modified polyether urethane structure, such as an alkyl group, an alkenyl group, an alkylaryl group, a cyclo Examples include alkyl groups, cycloalkenyl groups, hydrocarbons such as aromatic hydrocarbons, fluorocarbon groups, and alkyl silicone groups.

Examples of the alkyl group include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, isopentyl, neopentyl, tert-pentyl, hexyl, heptyl, octyl, 2-ethylhexyl, nonyl, decyl, undecyl, dodecyl. , tridecyl, isotridecyl, myristyl, palmityl, stearyl, isostearyl, icosyl, docosyl, tetracosyl, triacontyl, 2-octyldodecyl, 2-dodecyldodecyl, 2-dodecylhexadecyl, 2-tetradecyloctadecyl, monomethyl branched isostearyl, etc. can be mentioned.

Examples of the alkenyl group include vinyl, allyl, propenyl, isopropenyl, butenyl, pentenyl, isopentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tetradecenyl, oleyl, and the like.

Alkylaryl groups include phenyl, tolyl, xylyl, cumenyl, mesityl, benzyl, phenethyl, styryl, cinnamyl, benzhydryl, trityl, ethylphenyl, propylphenyl, butylphenyl, pentylphenyl, hexylphenyl, heptylphenyl, octylphenyl, nonyl. Examples include phenyl, α-naphthyl, β-naphthyl groups, and the like.

Examples of the cycloalkyl group and cycloalkenyl group include cyclopentyl, cyclohexyl, cycloheptyl, methylcyclopentyl, methylcyclohexyl, methylcycloheptyl, cyclopentenyl, cyclohexenyl, cycloheptenyl, methylcyclopentenyl, methylcyclohexenyl, and methylcycloheptenyl group. etc.

Examples of aromatic hydrocarbons include cholesterol, cholestanol, phytosterols, phytostanol, and derivatives thereof. Aromatic hydrocarbons are suitable as materials for hydrophobically modified polyether urethane because they have the property of very strongly associating in an aqueous solvent not only by hydrophobic interactions but also by π-π interactions.
Examples of the fluorinated carbon group include heptadecafluoro-n-decanol.

The alkylsilicone group is an alcohol residue of an alkylsiloxane having one hydroxyl group in its structure. Note that a part of the alkyl group may be substituted with a fluorinated carbon group. As the hydroxyl group-containing alkylsiloxane, commercially available products can be used, and examples of the commercially available products include Silaprene FM0411, Silaprene FM0421, and Silaprene FM0425 (all manufactured by Chisso Corporation). The hydroxyl group-containing alkyl silicone preferably has a molecular weight of 200 or more, more preferably 500 or more.

In addition, in the polyether monoalcohol, the alkylene oxide, styrene oxide, etc. to be added may be homopolymerized, random polymerization of two or more types, or block polymerization. The method of addition may be any conventional method. The degree of polymerization n is 0 to 1,000, preferably 1 to 200, more preferably 10 to 50. Furthermore, when the proportion of ethylene groups in R ⁴ is preferably 50 to 100% by mass, more preferably 65 to 100% by mass, a hydrophobically modified polyether ^urethane which is preferable for the purpose of the present invention can be obtained. It will be done.

In producing the hydrophobically modified polyether urethane of general formula (1), it can be obtained by a reaction between a normal polyether and an isocyanate. Further, it can be manufactured according to the method disclosed in Japanese Patent Publication No. 9-71766. For example, it can be obtained by heating polyether polyol, polyisocyanate, and polymonoalcohol at 80 to 90° C. for 1 to 3 hours to cause a reaction.

In addition, for example, the polyether polyol (a) represented by the above R ¹ -[(O-R ² ) _k -OH] _m , and the polyisocyanate (b) represented by the above R ³ -(NCO) _h+1 . , when reacting with the polyether monoalcohol (c) represented by HO-(R ⁴ -O) _n -R ⁵ , compounds other than the compound having the structure of general formula (1) may be produced as by-products. There is. For example, when diisocyanate is used, the main product is a c-b-a-b-c type compound, but other types include c-b-c type, c-b-(ab)x- A-b-c type compounds may be produced as by-products. In this case, the compound of the general formula (1) type can be used in the present invention in the form of a mixture containing the compound of the general formula (1) type without being separated.

Further, in the hydrophobically modified polyether urethane according to the present invention, urea, ether, ester, amide bonds, etc. may be further formed in the polymer.

Commercial products can be used as the hydrophobically modified polyether urethane of the present invention, and examples of commercial products include Adekanol UH140S, Adekanol UH-420, Adekanol UH-438, Adekanol UH-750, and Adekanol GT- 700 (manufactured by Asahi Denka Kogyo Co., Ltd.), Serad-FX1100, FX1010, 1035 (manufactured by HULS), Rheolate205, 208, 204, 225, 278, 244 (manufactured by Rheox) ), DW1206F, DW1206J, DW1206G (manufactured by Rohm & Haas), Dapral-T212 (manufactured by Akzo), Borchigel-LW44, DW1206N (manufactured by Borchers), and the like.

The blending amount of the associative thickener (C) is preferably 0.01 to 3.0% by mass, more preferably 0.5 to 1.0% by mass, based on the total amount of the composition. When the content is 0.01% by mass or more, appropriate thickening properties can be obtained, and when the content is 3.0% by mass or less, it spreads well on the skin and has good usability.

(D) Liquid oil The liquid oil is not particularly limited, but for example, hydrocarbon oils, non-polar oils such as silicone oil, and low polar oils such as monoester oil, which are usually blended in cosmetics, may be blended. can.

Examples of the hydrocarbon oil include olefin oligomers, liquid paraffin, ozokerite, squalane, pristane, paraffin, ceresin, and squalene.

Examples of silicone oils include linear polysiloxanes (e.g., dimethylpolysiloxane, methylphenylpolysiloxane, diphenylpolysiloxane, etc.), cyclic polysiloxanes (e.g., octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexane, etc.). sasiloxane, etc.).

Monoester oils include isopropyl myristate, cetyl octoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, decyl oleate, hexyldecyl dimethyl octoate, cetyl lactate, myristyl lactate, isocetyl stearate. , isocetyl isostearate, and the like.
Note that other ester oils such as pentaerythritol tetra-2-ethylhexanoate, glyceryl tri-2-ethylhexanoate, tripropylene glycol dineopentanoate, cetyl 2-ethylhexanoate, diethylhexyl succinate, etc. may also be used. .

(hydrating liquid oil)
(D) 50% by mass or more of the entire liquid oil is a water-retaining liquid oil. Preferred examples of the water-retaining liquid oil include triisostearin, glyceryl diisostearate, isostearyl malate, di(isostearyl/phytosteryl) dimer dilinoleate, and the like.

The amount of the water-retaining liquid oil component is preferably 3 to 15% by mass based on the total amount of the composition. When the amount of water-retaining liquid oil is 3% by mass or more, a suitable richness can be obtained, and when it is 15% by mass or less, emulsion stability and compatibility can be achieved.

(E) Humectant The oil-in-water emulsion composition of the present invention may further contain a humectant, and specifically, glycerin, dipropylene glycol, 1,3-butylene glycol, xylitol, maltitol, It may contain at least one selected from trimethylglycine, polyethylene glycol 20000, erythritol, acetylated hyaluronic acid, and hyaluronic acid.

(E) The amount of humectant added is preferably 3 to 15% by mass based on the total amount of the composition. When the amount of the moisturizer is 3% by mass or more, a more appropriate richness and moisturizing effect can be obtained, and when the amount is 15% by mass or less, it can be made more familiar.

The oil-in-water emulsion composition of the present invention may further contain an oil-soluble drug. Examples of oil-soluble drugs include vitamin E acetate and vitamin A acetate. By containing vitamin E acetate and vitamin A acetate, the moisturizing function and skin improving function can be further enhanced.

The blending amount of vitamin E acetate is preferably 0.001 to 2% by mass based on the total amount of the composition. When the amount of vitamin E acetate is 0.001% by mass or more, the moisturizing function and skin improvement function can be further enhanced, and when the amount is 2% by mass or less, the effect commensurate with the amount added can be obtained. I can do it.

In the oil-in-water emulsion composition of the present invention, the amount of monovalent lower alcohol blended is preferably 1% by mass or less based on the total amount of the composition. When the amount of the monohydric lower alcohol is 1% by mass or less based on the total amount of the composition, the stability of the oil-in-water emulsion composition can be improved.

The monohydric lower alcohol is a monohydric alcohol having 1 to 4 carbon atoms, and specifically includes methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-methyl-1-propanol, Examples include 2-butanol and 2-methyl-2-propanol.

The oil-in-water emulsion composition of the present invention may contain other ingredients commonly used in cosmetics, as long as the effects of the present invention are not impaired. Such ingredients include, for example, emulsifiers, humectants (excluding (E)), thickeners (excluding (A) and (C)), medicinal ingredients, transdermal absorption enhancers, pH adjusters, oxidants, etc. Examples include inhibitors, preservatives, antibacterial agents, neutralizing agents, fragrances, and the like.

The emulsifier is not particularly limited as long as it is commonly used in cosmetics, but alkyl-modified carboxyvinyl polymers having emulsifying power can be suitably used. Examples of polymers having emulsifying power include alkyl acrylate methacrylate copolymers, and commercially available products include Pemulen TR-1 and Pemulen TR-2 (both available from BF Goodrich). (manufactured by a company), etc.

Hydrophilic nonionic surfactants can also be suitably used, and examples include POE alkyl ether type nonionic surfactants. Commercially available products include POE (20) cetyl ether (Emarex 120, manufactured by Nippon Emulsion Co., Ltd.), POE (25) cetyl ether (Emarex 125, manufactured by Nippon Emulsion Co., Ltd.), and POE (30) cetyl ether (Emarex 130, manufactured by Nippon Emulsion Co., Ltd.). Emulsion Co., Ltd.), POE (30) behenyl ether (Nikkor BB-30, Nikkor Chemicals), POE (20) behenyl ether (Nikkor BB-20, Nikkor Chemicals), etc. can be used.

The oil-in-water emulsion composition of the present invention may contain a humectant other than component (E). Such humectants include, for example, sorbitol, chondroitin sulfate, mucoitin sulfate, caronic acid, atelocollagen, cholesteryl-12-hydroxystearate, sodium lactate, bile salts, dl-pyrrolidone carboxylate, alkylene oxide derivatives, Examples include chain soluble collagen, diglycerin ethylene oxide/propylene oxide adduct, Izayoirara extract, Yarrow extract, Melilot extract, amino acids, nucleic acids, proteins such as elastin, and mucopolysaccharides such as chondroitin sulfate.

Further, the oil-in-water emulsion composition of the present invention may contain thickeners other than components (A) and (C). Examples of such thickeners include carboxyvinyl polymer, succinoglycan, hydroxyethylcellulose, hydroxypropylcellulose, xanthan gum, and the like.

Furthermore, various medicinal ingredients can be added to the oil-in-water emulsion composition of the present invention.
For example, alkoxysalicylic acid and/or a salt thereof can be suitably blended as a whitening agent. Specific examples include 3-methoxysalicylic acid, 3-ethoxysalicylic acid, 4-methoxysalicylic acid, 4-ethoxysalicylic acid, 4-propoxysalicylic acid, 4-isopropoxysalicylic acid, 4-butoxysalicylic acid, 5-methoxysalicylic acid, 5-ethoxysalicylic acid. , 5-propoxysalicylic acid, or salts thereof.

Similarly, as a whitening agent, 4-alkylresorcinol and/or a salt thereof, or a 4-alkylresorcinol derivative and/or a salt thereof can be suitably blended. A specific example of 4-alkylresorcinol is 4-isobutylresorcinol.

Examples of 4-alkylresorcinol derivatives include phosphoric acid esters in which the hydrogen atoms of one or more phenolic hydroxyl groups of 4-alkylresorcinol are replaced with -P(O)(OR ¹ )(OR ² ). . Here, R ¹ and R ² represent a linear or branched alkyl group having 2 to 5 carbon atoms, or a hydrogen atom, and R ¹ and R ² may be the same or different.

Salts of alkoxysalicylic acid, 4-alkylresorcinol, and 4-alkylresorcinol derivatives include alkali metal salts (Na salt, K salt, etc.), alkaline earth metal salts (Ca salt, Mg salt, etc.), ammonium salts, and alkanolamine salts. Examples include salts, amino acid salts, etc., but alkali metal salts are preferred.

In addition to the above, examples include ascorbic acid or its derivatives, specifically sodium L-ascorbate, L-ascorbic acid ester magnesium salt, L-ascorbic acid glucoside, 2-O-ethyl-L-ascorbic acid, 3- O-ethyl-L-ascorbic acid, tranexamic acid, arbutin, 4-methoxysalicylate, specifically 4-methoxysalicylic acid sodium salt, 4-methoxysalicylic acid potassium salt, etc. can be blended.

In addition, various extracts (e.g., Japanese thorns, yarrow, melilot, sagebrush, saffron, peony, Japanese japonica, birch, sage, loquat, carrot, aloe, mallow, iris, grape, yarrow, loofah, lily, saffron, neem) , Gyoukyou, Hypericum perforatum, Ononis, garlic, chili pepper, chimpi, Japanese apricot, seaweed, etc.) may also be blended.

The oil-in-water emulsion composition of the present invention may contain a transdermal absorption enhancer commonly used in cosmetics and external skin preparations for the purpose of promoting absorption of medicinal ingredients. Examples of this include lauryl betaine (trade name: Anon BL-SF, manufactured by NOF Corporation), isostearic acid (trade name: Isostearic acid EX, manufactured by Kyukyu Alcohol Kogyo Co., Ltd.), and the like.

The oil-in-water emulsion composition of the present invention can be produced according to a conventional method. For example, oil-soluble components (components (B) and (D)) are added to an aqueous phase in which water-soluble components (components (A) and (C), and (E) if component (E) is included) are heated and mixed. Stir and mix while adding the heated and mixed oil phase to make it homogeneous. It can then be prepared by cooling the mixture to room temperature.
The oil-in-water emulsion composition of the present invention can take the form of products such as lotions, milky lotions, beauty serums, creams, and makeup bases. A particularly preferred embodiment is one in which the sheet is impregnated or supported.

The manner in which the oil-in-water emulsion composition of the present invention is impregnated or supported on a sheet is not particularly limited, and for example, the oil-in-water emulsion composition may be impregnated or supported on one side of a sheet-like support. In some embodiments, an adhesive surface is formed and a release film made of a plastic film is further laminated on the adhesive surface, or a decorative layer is applied between the mating surfaces of two overlapping sheet-like supports, as described in Patent Document 1. By sandwiching the adhesive and separating two overlapping supports during use, an application surface on which the oil-in-water emulsion composition is exposed is formed on each separated support. .

The case where the latter sheet is impregnated with or supported on the oil-in-water emulsion composition of the present invention will be explained as an example. The sheet base material is not particularly limited because the composition to be impregnated or supported is an oil-in-water emulsion composition in which water is on the outside. Can be widely used.

Examples of the cloth base material made of natural fibers or artificial fibers include nonwoven fabrics or woven fabrics such as paper, cloth, towels, blankets, knitted fabrics, and quilts.

Examples of natural fibers include pulp fibers, cotton, kapok, flax, ramie, hemp, jute, palm fiber, manila hemp, sisal hemp, coir fibers, and other plant fibers, domestic silkworm silk, citrus silkworm silk, wool, and cashmere. Examples include animal fibers such as hair, camel hair, alpaca hair, mohair, and rabbit hair.

Examples of man-made fibers include recycled fibers such as human silk thread, cotton wool, viscose, and Bemberg, or polyamide fibers, polyester fibers, polyacrylic fibers, polyvinyl/alcohol fibers, polyalkylene paraoxybenzoate fibers, and polyurethane fibers. Synthetic fibers such as polyvinylidene chloride fibers, polyvinyl chloride fibers, polyacrylonitrile fibers, polyethylene fibers, and polypropylene fibers, or copolymerization of natural and synthetic materials such as acetic acid artificial fibers. Examples include semi-synthetic fibers manufactured by

Examples of sheets made of polymer materials include polymers such as polyurethane, polyethylene, ethylene-vinyl acetate copolymer, polyvinyl chloride, polybutadiene, polypropylene, cellophane, polychloroprene, polyamino acids, nitrile rubber, butyl rubber, and silicone rubber. A sheet made of a thin material can be appropriately selected and used.

Fabric base materials made of natural fibers or man-made fibers have the advantage of having excellent anchoring properties for oil-in-water emulsion compositions, and provide a good texture and feeling of use.On the other hand, sheets made of polymeric materials have the following advantages: There is an advantage in that it is possible to suppress seepage of the oil-in-water emulsion composition. For this reason, it is preferable to use a laminated sheet in which a polymeric material is laminated on one side of a cloth base material made of natural fibers or artificial fibers, and to use the surface of this laminated sheet on the cloth base material side as the mating surface.

The shape and size of the support may be appropriately determined depending on the location to be pasted, and are not particularly limited. Further, the thickness of the support is not particularly limited, and if the thickness of the support is controlled by the actual thickness, it can be set to about 10 to 2000 μm; When controlling by basis weight (basis weight), it can be about 10 to 300 g/m ² .

The viscosity of the oil-in-water emulsion composition of the present invention at 25° C. is preferably 5,000 to 500,000 mPa·s, more preferably 5,000 to 500,000 mPa·s, and even more preferably 8,000 to 50,000 mPa·s. . Note that this viscosity was measured according to the rotational viscometer method in the viscosity measurement method described in the Japanese Pharmacopoeia Handbook (1996). By being 5000 mPa・s or more, the oil-in-water emulsion composition will not seep out during distribution or storage and will not cause loss, and the oil-in-water emulsion composition will not be absorbed unevenly on one support. do not have. In addition, since the viscosity is 500,000 mPa·s or less, when the support is separated or developed, there is no possibility that a residual oil-in-water emulsion composition will be transferred to one mating surface.

The viscosity can be adjusted by appropriately selecting the type and amount of oily components and various additives, water content, type of surfactant, etc. to be added to the oil-in-water emulsion composition.

When the oil-in-water emulsion composition is sandwiched between the mating surfaces of overlapping supports, the amount supported is preferably 100 to 5000 g/m ² , more preferably 200 to 5000 g/m 2 based on the area of the mating surfaces of the supports. It is preferably 3000 g/m ² , more preferably 300 to 1500 g/m ² . By being 100 g/m2 or ^more , most of the oil-in-water emulsion composition is not absorbed into the support when the oil-in-water emulsion composition is spread on the mating surface of the support during production. In addition, if the weight is 5000 g/ ^m2 or less, the oil-in-water emulsion composition may protrude during distribution or storage, resulting in loss, or when the support is separated or developed, it may be biased toward one mating surface. There is no possibility of leaving any residue to which the oil-in-water emulsion composition is transferred.

The sheet-shaped cosmetics can be applied to the face (whole body or cheeks, eyes, mouth, upper and lower parts of the eyes), arms, legs, chest, abdomen, neck, etc. It can be changed as appropriate depending on the part.

EXAMPLES Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to these Examples. In addition, the blending amounts in the following Examples and the like indicate mass % unless otherwise specified.

A water-in-oil emulsion cosmetic having the composition listed in Table 1 below and an oil-in-water emulsion cosmetic having the composition listed in Table 2 were each prepared by a conventional method and evaluated according to the following criteria.

(Stability of vitamin E acetate)
After storing the prepared oil-in-water emulsion cosmetic in a constant temperature bath at 50° C. for 2 months, a quantitative test was conducted using the immersion method, and evaluation was made according to the following criteria.
A: There is no change between before and after storage C: There is a change between before and after storage

(Emulsification stability)
After storing the prepared oil-in-water emulsion cosmetic in a constant temperature bath at 50° C. for one month, the condition was observed and evaluated according to the following criteria.
A: No change is observed B: A slight change in viscosity or increase in emulsified particles is observed, but there is no problem with use C: Separated

(transparency, richness, quick blending, no sagging)
The prepared oil-in-water emulsion cosmetics were used by 10 expert panelists and evaluated in terms of transparency, richness, quick absorption, and lack of smearing. The evaluation criteria are as follows.
<Evaluation points>
5 points: Very good 4 points: Good 3 points: Average 2 points: Poor 1 point: Very poor <Evaluation criteria>
A: Average score is 4.5 points or more B: Average score is 3.5 points or more and less than 4.5 points C: Average score is 2.5 points or more and less than 3.5 points D: Average score is less than 2.5 points

(comprehensive evaluation)
In order to make a comprehensive evaluation of the above evaluations of (emulsion stability), (transparency, richness, quickness of blending, and lack of kinking), a comprehensive evaluation was performed based on the following criteria.
A: All A ratings B: 2 or less B ratings C: 3 or more B ratings or 1 or more C ratings

The formulation and evaluation results are shown in Tables 1 and 2. In addition, the following commercially available products were used as the raw materials shown in the table.
・(Acrylamide/Na acryloyldimethyltaurine) copolymer: SIMULGEL600 (water-in-oil emulsion consisting of (acrylamide/Na acryloyldimethyltaurine) copolymer/isohexadecane/polysorbate 80/water, purity 37.5%) manufactured by SEPPIC ・Acryloyl Ammonium dimethyltaurate/beheneth methacrylate-25) crosspolymer: AristoflexHMB (manufactured by Clariant)
・Acrylic acid/alkyl methacrylate copolymer: PEMULEN TR-2 POLYMERIC EMULSIFIER (LUBRIZOL ADVANCED MATERIALS, Inc.)
・PEG-240/decyltetradeceth-20/HDI) copolymer: Adekanol GT-700 (manufactured by Asahi Denka Kogyo Co., Ltd.)
・Macadamia nut fatty acid phytosteryl: YOFCO-MAS (manufactured by Nippon Fine Chemical Co., Ltd.)

As shown in Tables 2 and 3, the oil-in-water emulsified cosmetics of Examples, although being oil-in-water, provided a feeling of richness that was almost the same as the water-in-oil emulsified cosmetics shown in Table 1. It was highly transparent, quickly blended in, and was resistant to twisting. On the other hand, Comparative Examples 1 to 3, which did not contain (B) a hydrated semisolid oil, did not have richness.
Some embodiments of the present disclosure are described in [Item 1] to [Item 7] below.
[Item 1]
(A) an acrylic acid thickener;
(B) a hydrating semi-solid oil;
(C) an associative thickener;
(D) liquid oil;
An oil-in-water emulsion composition comprising: (D) 50% by mass or more of the entire liquid oil component is a water-retaining liquid oil component.
[Item 2]
The (A) acrylic acid-based thickener is at least selected from acrylamide/acryloyl dimethyl taurate Na) copolymer, (acryloyl dimethyl taurate ammonium/methacrylic acid beheneth-25) crosspolymer, and acrylic acid/alkyl methacrylate polymer. The oil-in-water emulsion composition according to item 1, which is one.
[Item 3]
Furthermore, (E) at least one moisturizer selected from glycerin, dipropylene glycol, 1,3-butylene glycol, xylitol, maltitol, trimethylglycine, polyethylene glycol 20000, erythritol, acetylated hyaluronic acid, and hyaluronic acid. The oil-in-water emulsion composition according to item 1 or 2, comprising:
[Item 4]
The oil-in-water emulsion composition according to item 1, 2 or 3, further comprising an oil-soluble drug.
[Item 5]
The oil-in-water emulsion composition according to item 4, wherein the oil-soluble drug is vitamin E acetate.
[Item 6]
The oil-in-water emulsion composition according to any one of items 1 to 5, wherein the monohydric alcohol is 1% by mass or less based on the total amount of the composition.
[Item 7]
The oil-in-water emulsion composition according to any one of items 1 to 6, which is impregnated or supported on a sheet.

Claims (6)

(A) an acrylic acid thickener;
(B) a hydrating semi-solid oil;
(C) an associative thickener;
(D) liquid oil;
50% by mass or more of the entire liquid oil (D) is a water-retaining liquid oil;
The (B) water-retaining semi-solid oil contains macadamia nut fatty acid phytosteryl, tri(caprylic acid/capric acid) glyceryl, hydrogenated palm oil, dimer dilinoleic acid (phytosteryl/behenyl), bisdiglyceryl polyacyl adipate-2, and At least one type selected from shea butter,
The water-retaining liquid oil is at least one selected from triisostearin, glyceryl diisostearate, diisostearyl malate, and di(isostearyl/phytosteryl) dimer dilinoleate,
impregnated or supported on the sheet,
Oil-in-water emulsion composition. The (A) acrylic acid-based thickener is at least selected from acrylamide/acryloyl dimethyl taurate Na) copolymer, (acryloyl dimethyl taurate ammonium/methacrylic acid beheneth-25) crosspolymer, and acrylic acid/alkyl methacrylate polymer. The oil-in-water emulsion composition according to claim 1, which is one. Furthermore, (E) at least one moisturizer selected from glycerin, dipropylene glycol, 1,3-butylene glycol, xylitol, maltitol, trimethylglycine, polyethylene glycol 20000, erythritol, acetylated hyaluronic acid, and hyaluronic acid. The oil-in-water emulsion composition according to claim 1 or 2, comprising: The oil-in-water emulsion composition according to claim 1, 2 or 3, further comprising an oil-soluble drug. The oil-in-water emulsion composition according to claim 4, wherein the oil-soluble drug is vitamin E acetate. The oil-in-water emulsion composition according to any one of claims 1 to 5, wherein the monohydric alcohol is 1% by mass or less based on the total amount of the composition.