JP2011236199A - Oil-in-water emulsion composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil-in-water emulsion composition which contains an oil-soluble ultraviolet absorber having low solubility and has excellent stability.SOLUTION: The oil-in-water emulsion composition contains: (a) an aqueous dispersion of an oil-soluble ultraviolet absorber; (b) one or more kinds of compounds selected from (polyacrylic acid/alkyl acrylate) copolymer, a nonionic surfactant having an HLB of 8 or more, and fatty acid soap; and (c) a water-soluble polymer, wherein the component (a) is included in the outer (water) phase. The component (a) is preferably an aqueous dispersion of complex particles of an oil-soluble ultraviolet absorber and an organic polymer.

Description

  The present invention relates to an oil-in-water emulsified composition, and more particularly to an oil-in-water emulsified composition having an oil-soluble ultraviolet absorber blended in an outer phase (water phase) and having a stable and high UV protection ability.

  Sunscreen cosmetics are intended to protect the skin from the harmful effects of ultraviolet rays by cutting the ultraviolet rays in the sun. Examples of the base include emulsification type, lotion type, oil type, etc. Among them, the oil-in-water emulsification type has a fresh feeling of use and can be formulated from low SPF to high SPF products. Widely used (Non-Patent Document 1).

  On the other hand, ultraviolet absorbers blended in sunscreen cosmetics are oil-soluble and water-soluble, and absorb ultraviolet rays in the UVA region (wavelength 320 to 400 nm) and UVB region (wavelength 290 to 320 nm). In order to obtain a high protective ability, it is necessary to mix the UVB absorber and the UVA absorber in a balanced manner.

  However, many oil-soluble UV absorbers are poorly soluble, and in order to dissolve them, it is necessary to add a large amount of highly polar oil. There may be a problem of stability such that the UV absorber is precipitated at a low temperature in the phase.

  Patent Document 1 describes that a poorly soluble ultraviolet absorber is encapsulated in spherical polymer particles made of styrene or the like to form a spherical powder, thereby improving oil solubility and enabling high blending in the oil phase. However, the ultraviolet absorber is blended in water-in-oil milk cosmetics or solid cosmetics, and is not blended in the water phase (outer phase) of the oil-in-water emulsion.

JP 2009-91307 A

“New Cosmetics 2nd Edition” Takeo Mitsui, Nanzan-do, 2001, pp. 497-504

  Therefore, the subject in this invention is providing the oil-in-water type emulsion composition which contains the oil-soluble ultraviolet absorber with low solubility, and was excellent also in stability.

In order to solve such a problem, the present invention includes (A) an aqueous dispersion of an oil-soluble ultraviolet absorber, (B) (polyacrylic acid / alkyl acrylate) copolymer, a nonionic surfactant having an HLB of 8 or more, And an oil-in-water emulsion composition characterized by containing one or more compounds selected from fatty acid soaps and (C) a water-soluble polymer and containing the component (A) in the outer phase. .
In the present invention, the component (A) is preferably an aqueous dispersion of composite particles of an oil-soluble ultraviolet absorber and an organic polymer.

  The oil-in-water emulsified composition of the present invention was able to improve the stability of the system by blending a water phase (external phase) with an ultraviolet absorber that is sparingly soluble in oil. Further, there is an advantageous effect that the ultraviolet protection ability is improved as compared with the case where the same ultraviolet absorber is blended in the oil phase (inner phase). Therefore, the oil-in-water emulsified composition of the present invention is particularly suitable for use as a sunscreen cosmetic having a fresh feeling of use and excellent UV protection.

It is a graph which shows the ultraviolet absorption spectrum of the composition of Example 1 and Comparative Example 1. It is a graph which shows the ultraviolet absorption spectrum of the composition of Example 2 and Comparative Example 2. It is a graph which shows the ultraviolet absorption spectrum of the composition of Example 3 and Comparative Example 3.

The oil-in-water emulsion composition of the present invention is characterized by containing an aqueous dispersion (component A) of an oil-soluble ultraviolet absorber in an aqueous phase (outer phase).
The oil-soluble UV absorber is not particularly limited, but is preferably selected from UV absorbers that are insoluble in water and hardly soluble in oil. However, substantially insoluble oils such as methylenebisbenzotriazole tetramethylbutylphenol are not included. When an oil-in-water emulsion composition is prepared using an aqueous dispersion of an oil-insoluble ultraviolet absorber and applied to the skin, the applied skin may become unnaturally whitish.
Examples of the poorly soluble ultraviolet absorber include those described in Patent Document 1, and specific examples include benzophenone derivatives, triazine derivatives, and the like. Particularly, triazine derivatives, particularly 2,4-bis- {[4- (2-Ethylhexyloxy) -2-hydroxy] phenyl} -6- (4-methoxyphenyl)-(1,3,5) -triazine (hereinafter referred to as “bisethylhexyloxyphenol methoxyphenyl” Triazine ”is preferred.
This bisethylhexyloxyphenol methoxyphenyl triazine is commercially available under the trade name of Tinosorb S from BASF, and the commercially available product can be used.

The aqueous dispersion of the oil-soluble ultraviolet absorber in the present invention is particularly preferably an aqueous dispersion of composite particles of the oil-soluble ultraviolet absorber and the organic polymer. By using the composite particles, the oil-soluble ultraviolet absorber is prevented from eluting from the aqueous phase to the oil phase when the water phase containing the water dispersion and the oil coexist.
An aqueous dispersion of composite particles of an oil-soluble ultraviolet absorber and an organic polymer can be prepared, for example, according to a method described in WO2009 / 007264. Briefly, it can be obtained as an aqueous dispersion in which composite particles of an ultraviolet absorber and an organic polymer are dispersed by emulsion polymerization in a state where the mixture of the ultraviolet absorber and the organic monomer is dispersed in water.
As the organic monomer, monomers having an ethylenically unsaturated bond, for example, acrylic acid, methacrylic acid, alkyl acrylate, alkyl methacrylate, styrene monomer, nylon monomer and the like are preferably used.

  As such an aqueous dispersion of composite particles, those commercially available under the trade name of Tinosorb S Aqua from BASF may be used. Tinosorb S aqua contains composite particles of bisethylhexyloxyphenol methoxyphenyl triazine (Tinosorb S) and polymethyl methacrylate (PMMA) dispersed in water, and bisethylhexyloxyphenol methoxyphenyl triazine and PMMA. The content of is 20% by mass and 19% by mass, respectively.

The blending amount of the oil-soluble UV absorber in the composition of the present invention is 5% by mass or less, preferably 3% by mass or less, more preferably 0.01 to 3% by mass as a dry mass. If the blending amount is less than 0.01% by mass, sufficient ultraviolet light absorbing ability cannot be obtained, and if it exceeds 5% by mass, there is a tendency to cause a problem in usability such as poor spread.
For example, when converted as the amount of the aqueous dispersion (component A) containing 20% by mass of the ultraviolet absorber, the dispersion is 25% by mass or less, preferably 15% by mass or less, more preferably 0.05 It will mix | blend at -15 mass%.

  The composition of the present invention comprises ((polyacrylic acid / alkyl acrylate) copolymer, a nonionic surfactant having an HLB of 8 or more, and one or more compounds (component B) selected from fatty acid soaps). Contains as an emulsifier.

  The (polyacrylic acid / alkyl acrylate) copolymer is generally known as an alkyl-modified carboxyvinyl polymer (alkyl methacrylic acid alkyl copolymer). As a commercially available product, Carbopol. 1342, Pemulen TR-1, Pemulen TR-2, and the like, which can be preferably used.

  Nonionic surfactants having an HLB of 8 or more include, for example, POE (7) cetyl ether, POE (10) cetyl ether, POE (12) cetyl ether, POE (15) cetyl ether, POE (17) cetyl ether , POE (20) cetyl ether, POE (25) cetyl ether, POE (30) cetyl ether, POE (6) oleyl ether, POE (8) oleyl ether, POE (10) oleyl ether, POE (12) oleyl ether, POE (15) oleyl ether, POE (20) oleyl ether, POE (23) oleyl ether, POE (50) oleyl ether, POE (8) stearyl ether, POE (11) stearyl ether, POE (15) stearyl ether, POE (20) Steari Ether, POE (25) stearyl ether, POE (30) stearyl ether, POE (40) stearyl ether, POE (5) nonyl phenyl ether, POE (10) nonyl phenyl ether, POE (11) nonyl phenyl ether, POE (12 ) Nonyl phenyl ether, POE (13) nonyl phenyl ether, POE (15) nonyl phenyl ether, POE (20) nonyl phenyl ether, POE (25) nonyl phenyl ether, POE (30) nonyl phenyl ether, POE (5) octyl Phenyl ether, POE (8) octyl phenyl ether, POE (10) octyl phenyl ether, POE (15) octyl phenyl ether, POE (20) octyl phenyl ether, POE (25) o Tylphenyl ether, POE (30) octylphenyl ether, POE (40) octylphenyl ether, POE (50) octylphenyl ether, POE (5) lauryl ether, POE (7) lauryl ether, POE (9) lauryl ether, POE (10) Lauryl ether, POE (12) lauryl ether, POE (15) lauryl ether, POE (20) lauryl ether, POE (25) lauryl ether, POE (30) lauryl ether, POE (50) lauryl ether, POE ( 10) Hexyl decyl ether, POE (15) hexyl decyl ether, POE (20) hexyl decyl ether, POE (25) hexyl decyl ether, POE (10) isostearyl ether, POE (15) isos Thearyl ether, POE (20) isostearyl ether, POE (25) isostearyl ether, POE (10) octyl dodecyl ether, POE (16) octyl dodecyl ether, POE (20) octyl dodecyl ether, POE (25) octyl dodecyl ether , POE (10) decyl pentadecyl ether, POE (20) decyl pentadecyl ether, POE (30) decyl pentadecyl ether, POE (10) decyl tetradecyl ether, POE (15) decyl tetradecyl ether, POE (20) Decyl tetradecyl ether, POE (25) decyl tetradecyl ether, POE (10) cholesteryl ether, POE (15) cholesteryl ether, POE (20) cholesteryl ether, POE (2 ) Cholesteryl ether, POE (30) cholesteryl ether, POE (10) lauryl ether stearate, POE (12) dilaurate, POE (16) dilaurate, POE (20) dilaurate, POE (10) monostearate, POE (20) Monostearate, POE (30) monostearate, POE (40) monostearate, POE (150) monostearate, POE (150) distearate, POE (6) monoisostearate, POE (12) monoisostearate Rate, POE (20) monoisostearate, POE (6) monooleate, POE (10) monooleate, POE (6) glyceryl monoisostearate, POE (8) glyceryl monoisostearate, POE (10) glyceryl monoi Stearate, POE (15) glyceryl monoisostearate, POE (20) glyceryl monoisostearate, POE (25) glyceryl monoisostearate, POE (30) glyceryl monoisostearate, POE (40) glyceryl monoiso Stearate, POE (50) glyceryl monoisostearate, POE (60) glyceryl monoisostearate, POE (30) glyceryl triisostearate, POE (40) glyceryl triisostearate, POE (50) glyceryl triiso Stearate, POE (60) glyceryl triisostearate, POE (20) sorbitan monolaurate, POE (20) sorbitan monooleate, POE (40) sorbitan monooleate, POE (30) glyceryl Lioleate, POE (40) glyceryl trioleate, POE (50) glyceryl trioleate, POE (60) glyceryl trioleate, POE (5) glyceryl monostearate, POE (10) glyceryl monostearate, POE (15) glyceryl mono Stearate, POE (20) glyceryl monostearate, POE (30) glyceryl monostearate, POE (40) glyceryl monostearate, POE (60) glyceryl monostearate, POE (20) trimethylol propanthrimyristate , POE (25) trimethylol propan trimyristate, POE (30) trimethylol propan trimyristate, POE (25) trimethylol propan triisostearate, POE (30 Trimethylol propan triisostearate, POE (40) trimethylol propan triisostearate, POE (50) trimethylol propan triisostearate, POE (20) hydrogenated castor oil, POE (30) hydrogenated castor oil , POE (40) hydrogenated castor oil, POE (50) hydrogenated castor oil, POE (60) hydrogenated castor oil, POE (80) hydrogenated castor oil, POE (100) hydrogenated castor oil, POE (20) castor oil, POE ( 30) castor oil, POE (40) castor oil, POE (50) castor oil, POE (20) hydrogenated castor oil monolaurate, POE (30) hydrogenated castor oil monolaurate, POE (40) hydrogenated castor oil monolaur Rate, POE (50) hydrogenated castor oil monolaurate, POE (60) hydrogenated castor oil monolaurate POE (30) hydrogenated castor oil monoisostearate, POE (40) hydrogenated castor oil monoisostearate, POE (50) hydrogenated castor oil monoisostearate, POE (60) hydrogenated castor oil monoisostearate, POE (40) hydrogenated castor oil triisostearate, POE (50) hydrogenated castor oil triisostearate, POE (60) hydrogenated castor oil triisostearate, sorbitan monostearate, sorbitan monooleate, sorbitan monoisostearate Self-emulsifying glyceryl monostearate, diglyceryl monostearate, hydrogenated castor oil pyroglutamic acid isostearic acid diester, glyceryl pyroglutamic acid isostearic acid diester, PEG glyceryl isostearate, PEG glyceryl stearate Etc.

  Examples of fatty acid soaps include potassium laurate, potassium myristate, potassium palmitate, potassium stearate, potassium alginate, potassium behenate, sodium laurate, sodium myristate, sodium palmitate, sodium stearate, sodium alginate. , Sodium behenate, triethanolamine laurate, triethanolamine myristate, triethanolamine palmitate, triethanolamine stearate, triethanolamine alginate, triethanolamine behenate, aminomethylpropanol laurate, aminomyristate amino Methyl propanol, aminomethyl propanolate, aminomethyl propanol stearate, aminomethyl arginate Propanol, and behenic acid amino methyl propanol and the like.

  The amount of (polyacrylic acid / alkyl acrylate) copolymer, nonionic surfactant having an HLB of 8 or more, and one or more compounds (component B) selected from fatty acid soaps in the composition of the present invention Is 10 mass% or less, preferably 0.01 to 5 mass%, more preferably 0.01 to 3 mass%. When the blending amount is less than 0.01% by mass, it is difficult to obtain a stable emulsion, and when it exceeds 10% by mass, the usability of stickiness tends to be deteriorated.

Furthermore, the composition of the present invention contains a water-soluble polymer (component C).
Examples of water-soluble polymers include plant polymers, microbial polymers, and synthetic / semi-synthetic polymers. Examples of plant polymers include xanthan gum, gum arabic, tragacanth gum, galactan, guar gum, Examples of microbial polymers such as carob gum, karaya gum, carrageenan, pectin, agar, quince seed (malmello), algae colloid (cuckoo extract), starch (rice, corn, potato, wheat), glycyrrhizic acid, and the like include, for example, dextran, succino Examples include glucan and bull run.

  Semi-synthetic water-soluble polymers include, for example, starch polymers (eg, carboxymethyl starch, methylhydroxypropyl starch, etc.); cellulose polymers (methylcellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, sodium cellulose sulfate) Hydroxypropylcellulose, carboxymethylcellulose, sodium carboxymethylcellulose, crystalline cellulose, cellulose powder and the like); alginic acid polymers (for example, sodium alginate, propylene glycol alginate, etc.) and the like.

  Examples of the synthetic water-soluble polymer include vinyl polymers (for example, carboxyvinyl polymer (carbomer), polyvinyl alcohol, polyvinyl methyl ether, polyvinyl pyrrolidone, etc.); polyoxyethylene polymers (for example, polyethylene glycol 20, 000, 40,000, 60,000 polyoxyethylene polyoxypropylene copolymers, etc.); acrylic polymers (eg, polyacrylic acid, polyethyl acrylate, polyacrylamide, etc.); polyethyleneimine; cationic polymers, etc. It is done.

  The blending amount of these water-soluble polymers (component C) is 5% by mass or less, preferably 0.01 to 0.5% by mass, more preferably 0.01 to 0.3% by mass. When the blending amount is less than 0.01% by mass, the stability is deteriorated, and when the blending amount exceeds 5% by mass, the usability of stickiness tends to be deteriorated.

  The oil component that can constitute the oil-in-water emulsion composition of the present invention is not particularly limited. For example, liquid oils and fats include, for example, avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, Rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, sasanqua oil, castor oil, linseed oil, safflower oil, cottonseed oil, eno oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, cinnagiri Oil, Japanese drill oil, jojoba oil, germ oil, triglycerin and the like.

Examples of the solid fat include cacao butter, palm oil, horse fat, hydrogenated palm oil, palm oil, beef tallow, sheep fat, hydrogenated beef tallow, palm kernel oil, pork fat, beef bone fat, owl kernel oil, hydrogenated oil, cattle Leg fats, moles, hydrogenated castor oil and the like.
Examples of waxes include beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, ibota wax, whale wax, montan wax, nuka wax, lanolin, kapok wax, lanolin acetate, liquid lanolin, sugar cane wax, lanolin fatty acid isopropyl, hexyl laurate, and reduced lanolin. Jojoba wax, hard lanolin, shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol, POE hydrogenated lanolin alcohol ether, and the like.

Examples of the hydrocarbon oil include liquid paraffin, ozokerite, squalane, pristane, paraffin, ceresin, squalene, petrolatum, microcrystalline wax, and the like.
Examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, undecylenic acid, toluic acid, isostearic acid, linoleic acid, linolenic acid, eicosapentaenoic acid (EPA), docosahexaenoic acid ( DHA) and the like.

  Examples of higher alcohols include linear alcohols (eg, lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, cetostearyl alcohol); branched chain alcohols (eg, monostearyl glycerin ether (batyl alcohol) ), 2-decyltetradecinol, lanolin alcohol, cholesterol, phytosterol, hexyldodecanol, isostearyl alcohol, octyldodecanol and the like.

  Synthetic ester oils include isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyl decyl dimethyloctanoate, cetyl lactate, myristyl lactate Lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, apple Acid diisostearyl, di-2-heptylundecanoic acid glycerin, tri-2-ethylhexanoic acid trimethylolpropane, trii Stearic acid trimethylolpropane, tetra-2-ethylhexanoic acid pentaerythritol, tri-2-ethylhexanoic acid glycerin, trioctanoic acid glycerin, triisopalmitic acid glycerin, triisostearic acid trimethylolpropane, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, glyceryl trimyristate, tri-2-heptylundecanoic acid glyceride, castor oil fatty acid methyl ester, oleyl oleate, acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, N-lauroyl-L -Glutamic acid-2-octyldodecyl ester, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, myristic acid Examples include 2-hexyldecyl, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate, and triethyl citrate.

  Examples of the silicone oil include linear polysiloxanes (for example, dimethylpolysiloxane, methylphenylpolysiloxane, diphenylpolysiloxane, etc.); cyclic polysiloxanes (for example, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexyl). And silicone resins that form a three-dimensional network structure, various modified polysiloxanes (amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, fluorine-modified polysiloxane, etc.) It is done.

In the composition of the present invention, polar oils having an IOB of 0.05 or more may be blended, but the blending amount of these polar oils is 50% by mass or less, preferably 30% by mass or less, more preferably. Is preferably 15% by mass or less. If it exceeds 50% by mass, stickiness may be caused.
Examples of polar oils having an IOB above include 2-ethylhexyl paramethoxycinnamate, 2-ethylhexyl 2-cyano-3,3-diphenylacrylate, tripropylene glycol dipivalate, cetyl octanoate, tri-2-ethylhexane Acid trimethylolpropane, tetra-2-ethylhexanoic acid pentane erythritol, glyceryl tri-2-ethylhexanoate, diethyl hexyl naphthalene dicarboxylate, alkyl benzoate (12 to 15 carbon atoms), tri (capryl / capric acid) glycerin, di (Capryl / capric acid) propylene glycol, di-2-ethylhexyl succinate and the like are included.

The composition of the present invention may further contain another ultraviolet absorber in addition to the oil-soluble ultraviolet absorber aqueous dispersion (component A) to be blended in the aqueous phase.
Other ultraviolet absorbers are preferably oil-soluble and soluble in the oil phase (inner phase), and those that absorb ultraviolet rays synergistically with the ultraviolet absorber (component A) present in the aqueous phase are preferred.
Such an ultraviolet absorber is not particularly limited, for example, methoxycinnamic acid derivative, diphenylacrylic acid derivative, salicylic acid derivative, paraaminobenzoic acid derivative, triazine derivative, benzophenone derivative, benzalmalonate derivative, anthranil derivative, Examples include imidazoline derivatives, 4,4-diarylbutadiene derivatives, and phenylbenzimidazole derivative systems. Specifically, 2-ethylhexyl paramethoxycinnamate, homosalate, octyl salicylate, oxybenzone, 4-t-butyl-4′-methoxydibenzoylmethane, octyl triazone, bisethylhexylphenol methoxyphenyl triazine, methylene bisbenzotria Zolyltetramethylbutylphenol, 2-hydroxy-4-methoxybenzophenone, dihydroxydimethoxybenzophenone, dihydroxybenzophenone, tetrahydroxybenzophenone, diethylaminohydroxybenzoyl hexyl benzoate, 2-cyano-3,3-diphenylacrylic acid-2'-ethylhexyl ester , Polysilicone-15, dolometrizole polysiloxane, and the like.

  In the composition of the present invention, in addition to the above-described components, other components usually used in external compositions such as cosmetics are included within the limits that do not substantially interfere with the intended effects of the present invention. It can be included.

  The composition of the present invention can be prepared, for example, by separately mixing the component constituting the oil phase and the component constituting the aqueous phase, adding the oil phase to the aqueous phase and emulsifying.

  The composition of the present invention is particularly suitable for use as an oil-in-water emulsion type sunscreen cosmetic because it has the fresh use feeling inherently possessed by an oil-in-water emulsion and exhibits excellent UV protection. Is.

  Hereinafter, the present invention will be described in more detail with specific examples, but the present invention is not limited to the following examples. Moreover, the compounding quantity in a following example etc. shows the mass% unless there is particular notice.

(Examples and Comparative Examples)
Oil-in-water emulsion compositions having the compositions listed in Table 1 and Table 2 below were prepared. Specifically, each of the aqueous phase component and the oil phase component was heated to 70 ° C. and completely dissolved, and then the oil phase was added to the aqueous phase and emulsified with an emulsifier to obtain the composition of each example. .
Samples 18.87 μL of the compositions of Examples 1 to 3 and Comparative Examples 1 to 3 were uniformly applied to the surface of a PMMA film (5 cm × 5 cm) at a rate of 0.75 mg / cm ² . After leaving for 15 minutes, the absorbance of each sample was measured using a spectrophotometer (U-4100: manufactured by Hitachi, Ltd.). The results are shown in FIGS.

  Separately from the above, an oily mixture (Example 1) in which the liquid oil of Example 1 (olefin oligomer, methylphenylpolysiloxane, 2-ethylhexyl paramethoxycinnamate) was mixed in the ratio described in Table 1, and bisethylhexyl. An oily composition (Comparative Example 1) to which oxyphenol methoxyphenyl triazine was further added was prepared, each was sealed in a 50 mL screw tube, cooled to 25 ° C., and a small amount of bisethylhexyloxyphenol methoxyphenyl triazine was solidified. The stability of the oil phase was evaluated by microscopic observation of each mixture after being added for 1 week and stored at 0 ° C. for 1 week. These results are also shown in Table 1 with x when the amount of crystals more than the amount added was observed and ◯ when no more crystals were added than when added.

Similarly, Example 2 (hydrogenated polydecene, methylphenylpolysiloxane, 2-ethylhexyl paramethoxycinnamate, butylmethoxydibenzoylmethane) and Comparative Example 2 (hydrogenated polydecene, methylphenylpolysiloxane, 2-ethylhexyl paramethoxycinnamate, 4-t-butyl-4′-methoxydibenzoylmethane + bisethylhexyloxyphenol methoxyphenyltriazine), Example 3 and Example 4 (olefin oligomer, phenyltrimethicone, 2-ethylhexyl paramethoxycinnamate) and Comparative Example 3 And Comparative Example 4 (olefin oligomer, phenyltrimethicone, 2-methoxyhexyl paramethoxycinnamate + bisethylhexyloxyphenol methoxyphenyltriazine) was also evaluated for stability.
The results are also shown in Table 1 with ◯ when no crystals were seen and x when crystals were seen.

As apparent from Table 1, in Comparative Examples 1 to 4 in which bisethylhexyloxyphenol methoxyphenyl triazine was blended in the oil phase, the stability was poor and crystals were formed at a low temperature (0 ° C.).
In addition, from the results shown in FIGS. 1 to 3, in the composition (Examples 1 to 4) in which bisethylhexyloxyphenol methoxyphenyltriazine was blended in the aqueous phase in the form of an aqueous dispersion, bisethylhexyloxyphenol methoxyphenyltriazine It became clear that the ultraviolet absorptivity which was superior to Comparative Examples 1-4 which mix | blended in the oil phase was shown.

A cosmetic comprising an oil-in-water emulsion composition was prepared according to the following formulation. Specifically, each of the aqueous phase component and the oil phase component was heated to 70 ° C. and completely dissolved, and then the oil phase was added to the aqueous phase and emulsified with an emulsifier to obtain the composition of each example. .
(Formulation example 1) Sunscreen latex oil phase part Amount (% by mass)
Vaseline 1
Dimethylpolysiloxane 3
Methylphenylpolysiloxane 3
Stearyl alcohol 0.5
Squalane 1
Isostearic acid 0.5
Stearic acid 0.5
Polyoxyethylene glyceryl monostearate 1
Glycerol monostearate 2
Diethylaminohydroxybenzoyl hexyl benzoate 2
2-methoxyhexyl paramethoxycinnamate 5
2-Cyano-3,3-diphenylacrylic acid-2′-
Ethylhexyl ester 5
Aqueous part Glycerin 7
Dipropylene glycol 3
1,3-butylene glycol 7
Xylitol 3
Potassium hydroxide 0.05
L-ascorbyl magnesium phosphate 0.1
Tocopherol acetate 0.1
Acetylated sodium hyaluronate 0.1
EDTA trisodium 0.05
Bisethylhexyloxyphenol methoxyphenyl triazine aqueous dispersion 10
Carboxyvinyl polymer 0.1
Phenoxyethanol Appropriate amount Purified water Residual perfume Appropriate amount

(Formulation example 2) Sunscreen latex oil phase part Amount (% by mass)
Decamethylcyclopentasiloxane 3
Methylphenylpolysiloxane 3
Behenyl alcohol 1
Polyoxyethylene glyceryl isostearate 1.5
Polyoxyethylene glyceryl monostearate 1
2-methoxyhexyl paramethoxycinnamate 5
2-Cyano-3,3-diphenylacrylic acid-2′-
Ethylhexyl ester 5
Polysilicone-15 2
Octyl rearzone 1
Aqueous part 1,3-butylene glycol 5
Dipotassium glycyrrhizinate 0.05
Trimethylglycine 1
L-ascorbic acid 2-glucoside 2
Edetate trisodium 0.1
Bisethylhexyloxyphenol methoxyphenyl triazine aqueous dispersion 15
4-t-butyl-4′-methoxydibenzoylmethane 2
Xanthan gum 0.1
Carboxyvinyl polymer 0.3
Phenoxyethanol Appropriate amount Purified water Residual perfume Appropriate amount

(Formulation example 3) Sunscreen latex oil phase part Amount (% by mass)
Dimethylpolysiloxane 3
Methylphenylpolysiloxane 3
Di-2-ethylhexyl succinate 3.5
4-t-butyl-4′-methoxydibenzoylmethane 2
2-methoxyhexyl paramethoxycinnamate 5
2-Hydroxy-4-methoxybenzophenone 2
Water phase ethanol 5
Glycerin 4
Dipropylene glycol 5
1,3-butylene glycol 2
Potassium hydroxide 0.1
Sodium hexametaphosphate 0.1
Thiotaurine 0.1
Edetate trisodium 0.1
Bisethylhexyloxyphenol methoxyphenyl triazine aqueous dispersion 15
Iron oxide 0.01
Acrylic acid / alkyl methacrylate copolymer (Pemulene TR-2) 0.1
Carboxyvinyl polymer 0.2
Paraben Suitable amount Purified water Residual flavor

(Formulation example 4) Sunscreen cream oil phase part Amount (mass%)
Behenic acid 1
Stearic acid 1
Glyceryl tri-2-ethylhexanoate 3
Cetyl 2-ethylhexanoate 2
Polyoxyethylene glyceryl isostearate 1
Glycerol monostearate 1
Polyoxyethylene glyceryl monostearate 1
2-Cyano-3,3-diphenylacrylic acid-2′-
Ethylhexyl ester 5
4-t-butyl-4′-methoxydibenzoylmethane 1
Eicosene / vinylpyrrolidone copolymer 2
Aqueous phase dipropylene glycol 5
Fine particle titanium oxide (30nm) 2
Phenylbenzimidazolesulfonic acid 2
Sodium hexametaphosphate 0.1
Phenoxyethanol Appropriate amount Trisodium edetate Appropriate amount Triethanolamine 0.25
Bisethylhexyloxyphenol methoxyphenyl triazine aqueous dispersion 5
Carboxymethylcellulose 0.1
Purified water Residual fragrance Appropriate amount

Claims (8)

(A) an aqueous dispersion of an oil-soluble ultraviolet absorber;
(B) a (polyacrylic acid / alkyl acrylate) copolymer, a nonionic surfactant having an HLB of 8 or more, and one or more compounds selected from fatty acid soap, and (c) a water-soluble polymer. An oil-in-water emulsion composition containing the component (a) in an outer phase. The composition according to claim 1, wherein the component (a) is an aqueous dispersion of composite particles of an oil-soluble ultraviolet absorber and an organic polymer. The composition according to claim 1 or 2, wherein the oil-soluble ultraviolet absorber is a triazine derivative. The composition according to any one of claims 1 to 3, wherein the oil-soluble ultraviolet absorber is bisethylhexyloxyphenol methoxyphenyl triazine. The composition according to any one of claims 1 to 4, wherein a blending amount of the oil-soluble ultraviolet absorber is 5% by mass or less. The composition according to any one of claims 1 to 5, wherein the amount of the water-soluble polymer (c) is 0.01 to 0.3% by mass. The composition according to any one of claims 1 to 6, wherein (d) an oil having an IOB of 0.05 or more is contained in an amount of 50% by mass or less. The composition according to any one of claims 1 to 7, which is a sunscreen cosmetic.