JPH11269049A - O/w emulsion type sunscreen preparation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject preparation excellent in stability and water- repellency even in a case of containing a polyglycerol fatty acid ester and an O-alkanoyl lactic acid as an emulsifier, having hardly hardened properties, derived from an inorganic pigment and hardly causing deteriorated feeling in use by adding the inorganic pigment in combination with a spherical cellulose thereto. SOLUTION: This cosmetic comprises (A) a polyglycerol fatty acid ester having >=4 polymerization degree (preferably decaglyceryl pentalaurate), (B) an >=8 O-alkanoyl lactic acid or a salt thereof (preferably myristoyl lactic acid and its sodium salt or the like), (C) an inorganic pigment (e.g. titanium oxide and talc) and (D) a spherical cellulose (preferably porous spherical cellulose acetate). The mixing ratio of the components A to B is preferably (1:20)-(20:1) expressed in terms of weight, and the total weight of the components A and B is 1.5-3.5% based on the total amount of the composition. The amount of the formulated component C is 5-15% based on the total amount of the composition, and the amount of the formulated component D is 25-35% based on the amount of the component C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an O / W emulsion type cosmetic which is excellent in stability, water repellency and feeling of use and whose physical properties are not hardened.

[0002]

2. Description of the Related Art In general, O / W emulsion type cosmetics have poor stability because the emulsifier composition to be used is easily affected by the phase inversion temperature. And the use of stabilizers such as polymers. In addition, there is also a drawback that when it is brought into contact with water after being applied to the skin, it is re-emulsified. For this reason, W / O emulsion type cosmetics which use almost no hydrophilic emulsifier and have good water repellency have been widely used as skin cosmetics.
However, in order to prepare a W / O emulsion type cosmetic, a large amount of a wax or a gelling agent for oil is required in many cases, and many of them have a strong oily feel.

[0003] In recent years, as the effects of ultraviolet rays on the skin have become clear, sunscreen cosmetics have attracted attention, and various O / W emulsion-type sunscreen cosmetics have been studied from the viewpoint of feeling of use. I have. However, the sunscreen cosmetics of the O / W emulsion type have, in addition to the above-mentioned problems, a problem that when an inorganic pigment such as titanium oxide having an ultraviolet ray blocking or absorbing action is blended, a feeling of use becomes worse. there were.

[0004] For this reason, attempts have been made to solve the problems of O / W emulsions and W / O emulsions and to develop cosmetics having a better feeling of use. For example, an emulsifier composition containing a polyglycerol fatty acid ester having a degree of polymerization of 4 or more and an acyl lactic acid having 8 or more carbon atoms or a salt thereof (Japanese Patent Application Laid-Open No. 7-284645), such an emulsifier composition, an inorganic pigment and carbon O / W emulsion type cosmetic containing a basic amino acid salt of a fatty acid having a number of 8 or more
48705) and the like.

However, when this emulsifier composition is used for liquid cosmetics, there is a problem that stability at high temperatures is deteriorated, and the feeling of use has not been sufficiently satisfactory. In addition, when this emulsifier composition is blended with an O / W emulsion type cosmetic, although favorable effects such as water repellency can be obtained, physical properties of the cosmetic itself become hard,
There is also a problem that it becomes difficult to use it for emulsions, creams and the like.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an O / W emulsion type sunscreen cosmetic which is excellent in stability and water repellency, does not harden its physical properties, and does not deteriorate the feeling of use derived from inorganic pigments. Is to provide.

[0007]

Under such circumstances, the present inventors have conducted intensive studies. As a result, even in cosmetics containing a specific emulsifier, if spherical cellulose is used together with an inorganic pigment, stability and water repellency are obtained. O / with excellent usability
The inventors have found that a W emulsion type sunscreen cosmetic can be obtained, and have completed the present invention.

That is, the present invention provides an O / W emulsion type cosmetic comprising a polyglycerin fatty acid ester having a degree of polymerization of 4 or more, O-alkanoyl lactic acid having 8 or more carbon atoms or a salt thereof, an inorganic pigment and spherical cellulose. Things.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In the cosmetic of the present invention, a polyglycerin fatty acid ester having a degree of polymerization of 4 or more and O-alkanoyl lactic acid having 8 or more carbon atoms or a salt thereof are used as emulsifiers. Here, as the polyglycerin fatty acid ester, an ester of polyglycerin having a degree of polymerization of 4 to 10 and one or more fatty acids having 12 or more carbon atoms is preferable.

Specifically, for example, tetraglyceryl dilaurate, tetraglyceryl dimyristate, tetraglyceryl dipalmitate, tetraglyceryl distearate, tetraglyceryl dibehenate, tetraglyceryl trilaurate, tetraglyceryl trimmyristate, tripalmitate Tetraglyceryl, tetraglyceryl tristearate, tetraglyceryl tribehenate, tetraglyceryl tetralaurate, tetraglyceryl tetramyristate, tetraglyceryl tetrapalmitate, tetraglyceryl tetrastearate, tetraglyceryl tetrabehenate, hexaglyceryl dilaurate, dimyristine Hexaglyceryl acid, hexaglyceryl dipalmitate, hexaglyceryl distearate, dibehenic acid Xaglyceryl, hexaglyceryl trilaurate, hexaglyceryl trimyristate, hexaglyceryl tripalmitate, hexaglyceryl tristearate, hexaglyceryl tribehenate, hexaglyceryl tetralaurate, hexaglyceryl tetramyristate, hexaglyceryl tetrapalmitate, tetra Hexaglyceryl stearate, hexaglyceryl tetrabehenate, hexaglyceryl pentalaurate, hexaglyceryl pentamyristate,
Hexaglyceryl pentapalmitate, hexaglyceryl pentastearate, hexaglyceryl pentabehenate, decaglyceryl trilaurate, decaglyceryl trimyristate, decaglyceryl tripalmitate,
Decaglyceryl tristearate, decaglyceryl tribehenate, decaglyceryl tetralaurate, decaglyceryl tetramyristate, decaglyceryl tetrapalmitate, decaglyceryl tetrastearate, decaglyceryl tetrabehenate, decaglyceryl pentalaurate, decaglyceryl pentamyristate Glyceryl, decaglyceryl pentapalmitate, decaglyceryl pentastearate, decaglyceryl pentabehenate, decaglyceryl heptalaurate, decaglyceryl heptamyristate, decaglyceryl heptapalmitate, decaglyceryl heptastearate, decaglyceryl heptabehenate, octalaurin Decaglyceryl acid, decaglyceryl octamyristate, decaglyceryl octapalmitate, octa Stearate decaglyceryl include Okutabehenin decaglyceryl like. Of these, decaglyceryl pentalaurate, decaglyceryl pentamyristate, decaglyceryl pentapalmitate, decaglyceryl pentastearate, and decaglyceryl pentabehenate are particularly preferred. These polyglycerin fatty acid esters can be used alone or in combination of two or more.

The O-alkanoyl lactic acid has an alkanoyl group having 8 or more carbon atoms, preferably 8 to 18 carbon atoms. Examples of the salt include alkali metal salts such as sodium salts and potassium salts, calcium salts, and the like. Examples include alkaline earth metal salts such as magnesium salts, ammonium salts, and triethanolamine salts.

More specifically, for example, octanoyl lactic acid and its sodium, calcium, magnesium, ammonium and triethanolamine salts; caproyl lactic acid and its sodium, calcium, magnesium, ammonium and triethanolamine salts 2-ethylhexanoyl lactic acid and its sodium, calcium, magnesium, ammonium and triethanolamine salts; lauroyl lactic acid and its sodium, calcium, magnesium, ammonium and triethanolamine salts; myristoyl lactic acid and Its sodium, calcium, magnesium, ammonium and triethanolamine salts; palmitoyl lactic acid and its sodium, calcium, magnesium, ammonium and trietium salts Noruamin salts; stearoyl lactate and sodium salts thereof, calcium salts, magnesium salts, ammonium salts, triethanolamine salts; Isostearoyl lactate and sodium salts thereof, calcium salts,
Magnesium salt, ammonium salt, triethanolamine salt; oleoyl lactic acid and its sodium salt, calcium salt, magnesium salt, ammonium salt, triethanolamine salt; 12-hydroxystearoyl lactic acid and its sodium salt, calcium salt, magnesium salt, ammonium Salts, triethanolamine salts; ricinoleyl lactic acid and its sodium, calcium, magnesium, ammonium, and triethanolamine salts; behenoyl lactic acid and its sodium, calcium, magnesium, ammonium, and triethanolamine salts; No. Of these, myristoyl lactic acid and its sodium salt, palmitoyl lactic acid and its sodium salt, stearoyl lactic acid and its sodium salt, and behenoyl lactic acid and its sodium salt are particularly preferred. These O-alkanoyl lactic acids can be used alone or in combination of two or more.

The mixing ratio of the polyglycerin fatty acid ester and O-alkanoyl lactic acid or a salt thereof is not particularly limited, but is preferably in the range of 1:20 to 20: 1 by weight. The total amount of the polyglycerin fatty acid ester and O-alkanoyl lactic acid or a salt thereof is 1 to
It is preferably 8% by weight, especially 1-4% by weight, more preferably 1.5-3.5% by weight. As such a mixed emulsifier of polyglycerin fatty acid ester and O-alkanoyl lactic acid, for example, those described in JP-A-7-284645 can be used, and as commercial products, for example, Nikomulus 41 (manufactured by Nikko Chemicals) Etc. can be used.

The inorganic pigment used in the present invention is not particularly limited as long as it is used in ordinary cosmetics. For example, titanium oxide, talc, mica, kaolin, zinc white, navy blue, ultramarine, chromium oxide, yellow oxide Iron, red iron oxide, black iron oxide, barium sulfate, aluminum hydroxide, aluminum silicate, silicic anhydride, hydrated silicic acid, and the like. In addition, lipophilic treated inorganics obtained by surface-treating these with fatty acids, silicone, lecithin, etc. Pigments can also be used. These inorganic pigments can be used singly or in combination of two or more kinds. The content of 3 to 20% by weight, especially 5 to 15% by weight in the total composition is preferred for the sunscreen effect, stability and use. It is preferable in terms of feeling.

The spherical cellulose is not particularly limited as long as it is used in ordinary cosmetics. For example, cellulose esters such as cellulose triacetate, cellulose tripropionate, cellulose tributyrate, and cellulose trinitrate; Mixed esters of cellulose such as cellulose butyrate, cellulose acetate / propionate, and cellulose acetate / propionate; cellulose diacetate, cellulose dinitrate,
Partial esters of cellulose such as cellulose dipropionate, cellulose dibutyrate, cellulose monoacetate, and cellulose mononitrate; and intermediate esters thereof. Of these, cellulose acetate, particularly porous spherical cellulose acetate, is preferred.

Spherical cellulose is used in an amount of 20 to inorganic pigment.
It is preferable to mix it in an amount of from 40 to 40% by weight, particularly from 25 to 35% by weight, since a better feeling in use can be obtained.

It is preferable that the O / W emulsion type cosmetic composition of the present invention further contain a fatty acid or a derivative thereof which is liquid at room temperature, because the curing of the physical properties can be further suppressed. Such fatty acids are preferably those having 10 or more carbon atoms, and specific examples include isostearic acid, oleic acid, linoleic acid, linolenic acid and the like. Of these, isostearic acid is particularly preferred in terms of safety, cost, and the like. Derivatives of these fatty acids include salts of alkali metals, alkaline earth metals, alkanolamines and the like, amides, esters and the like.

These fatty acids or derivatives thereof can be used alone or in combination of two or more. When incorporated in the total composition in an amount of 0.1 to 5% by weight, especially 0.5 to 3% by weight,
It is preferable because the curing of the physical properties can be sufficiently suppressed and a stable emulsion can be obtained.

The O / W emulsion type cosmetic of the present invention comprises, in addition to the above-mentioned components, components used in ordinary cosmetics,
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, sunflower oil, cottonseed oil, eno oil, soybean oil, peanut oil, teaseed oil, kaya oil, rice bran oil, sinagiri oil, Japanese kiri oil, jojoba oil, germ oil, triglycerin, Liquid fats and oils such as trioctanglyserine and glycerin triisopalmitate, cocoa butter, coconut oil, horse fat, hydrogenated coconut oil, palm oil, tallow, sheep fat, hardened tallow, palm kernel oil, lard, beef bone fat, mocro , Solid oils such as hardened castor oil, 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, Reduced lanolin, jojoba wax, hard lanolin, shellac wax, POE lanolina Waxes such as coal ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol, POE hydrogenated lanolin alcohol ether, oils such as hydrocarbons such as liquid paraffin, ozokerite, squalene, petrolatum, and microcrystalline wax; polyethylene glycol Glycerin, 1,3-butylene glycol, xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid, mucoitic acid, caronic acid, atelocollagen, cholesteryl-1
Moisturizers such as 2-hydroxystearate, sodium lactate, bile salts, dl-pyrrolidone carboxylate, short-chain soluble collagen, diglycerin (EO) PO adduct; para-aminobenzoic acid (hereinafter abbreviated as PABA), PABA mono Glycerin ester, N, N-diethoxy PABA ethyl ester, N, N-dipropoxy PABA ethyl ester, N, N-dimethyl PABA ethyl ester, N, N
Benzoic acid ultraviolet absorbers such as N-diethoxybutyl ester, anthranilic acid ultraviolet absorbers such as homomenthyl-N-acetylanthranilate, amyl salicylate, menthyl salicylate, homomenthyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate , Salicylic acid-based ultraviolet absorbers such as p-isopropanol phenyl salicylate, octyl cinnamate, ethyl-4-isopropyl cinnamate,
Methyl-2,5-diisopropylcinnamate, ethyl-2,4-diisopropylcinnamate, methyl-2,
4-diisopropylcinnamate, propyl-p-methoxycinnamate, isopropyl-p-methoxycinnamate, isoamino-p-methoxycinnamate, octyl-p-methoxycinnamate [2-ethylhexyl-p-methoxycinnamate], 2 -Ethoxyethyl-
p-methoxycinnamate, cyclohexyl-p-methoxycinnamate, ethyl-α-cyano-β-phenylcinnamate, 2-ethylhexyl-α-cyano-β-
Cinnamate UV absorbers such as phenylcinnamate and glyceryl mono-2-ethylhexanoyl-diparamethoxycinnamate; 2,4-dihydroxybenzophenone;
2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2,2 ', 4,4'-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-4'-methylbenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonate, 4-phenylbenzophenone, 2-ethylhexyl-4'-phenyl-benzophenone-2-carboxylate, 2-hydroxy-4
-N-octoxybenzophenone, 4-hydroxy-3
A benzophenone-based ultraviolet absorber such as carboxybenzophenone, 3- (4'-methylbenzylidene) -dl-camphor, 3-benzylidene-dl-camphor, urocanic acid, urocanic acid ethyl ester, 2-phenyl-
5-methylbenzoxazole, 2,2'-hydroxy-
5-methylphenylbenzotriazole, 2- (2'-
Hydroxy-5'-t-octylphenyl) benzotriazole, 2- (2'-hydroxy-5'-methylphenylbenzotriazole, dibenzarazine, dianisoylmethane, 4-methoxy-4'-t-butyldibenzoylmethane, UV absorbers such as-(3,3-dimethyl-2-norbornylidene) -3-pentan-2-one; surfactants, thickeners, fragrances, drugs, antioxidants, chelating agents, pigments, water, preservatives An antifungal agent and the like can be appropriately compounded within a quantitative and qualitative range that does not impair the effects of the present invention.

The O / W emulsion type cosmetic of the present invention comprises:
It can be manufactured by a conventional method, and is useful as a sunscreen cosmetic such as a sunscreen cream and a sunscreen emulsion.

[0021]

Industrial Applicability The O / W emulsion type cosmetic of the present invention is excellent in stability, water resistance, water repellency and feeling of use, and does not harden in physical properties and is easily spread on skin and the like.

[0022]

EXAMPLES Next, the present invention will be further described with reference to examples, but the present invention is not limited to these examples.

Example 1 (Sunscreen emulsion)

Table 1 (Composition) (% by weight) (1) Hexaglyceryl polyricinoleate 1.5 (2) Mixture of lipophilic titanium oxide and zinc oxide 7.5 (3) Liquid paraffin 5.0 (4) Myristic acid Octyldodecyl 2.5 (5) Cellulose acetate powder (Cellufow TA-25, manufactured by Chisso) 2.5 (6) Methylphenylpolysiloxane 15.0 (7) Nikomulus 41 (manufactured by Nikko Chemicals) 2.75 (poly (A mixture of glycerin fatty acid ester and O-alkanoyl lactic acid) (8) Liquid paraffin 2.5 (9) Natural vitamin E 0.005 (10) Decaglyceryl monoisostearate 3.0 (11) 1,3-butylene glycol 5. 0 (12) Paraben 0.15 (13) Fragrance 0.2 (14) Water remaining

(Preparation method) The components (1) to (6) were stirred and heated in an emulsifying kettle, and the components (7) to (9) were mixed by heating and dissolved. ~ (14)
Was added, mixed and cooled to obtain a sunscreen emulsion.

Comparative Example 1 (Sunscreen emulsion) A sunscreen emulsion was prepared in the same manner as in Example 1 except that the component (5) was not blended.

Test Example 1 The sunscreen emulsions obtained in Example 1 and Comparative Example 1 were evaluated for feeling of use by seven expert panelists according to the following criteria. The results are shown in Table 2 as average values. Very good ... +2 Good ... ... +1 Neither can be said ... 0 Somewhat bad ... ... -1 Bad ... .....- 2

[0027]

[Table 2]

As is clear from the results shown in Table 2, the sunscreen emulsion of the present invention containing cellulose acetate powder was excellent in feeling in use. Further, stability, water repellency and the like were also good.

Example 2 (Sunscreen emulsion) A sunscreen emulsion having the composition shown in Table 3 was produced and its hardness was measured. In addition, the usability was evaluated in the same manner as in Test Example 1. The results are shown in Table 3.

(Preparation method) The components (1) to (7) were stirred and heated in an emulsification vessel, and the components (8) to (10) were mixed by heating and dissolved. ~ (1
The mixture obtained by heating, mixing and dissolving 5) was added, mixed and cooled to obtain a sunscreen emulsion.

(Evaluation method) Each sunscreen emulsion was heated at 5 ° C.
Stored at 5 ° C. and 40 ° C., and after one day and one week, the hardness was determined by SUN RHEO METER (SUN SCIE).
NTIFIC).

[0032]

[Table 3]

Example 3 (Sunscreen emulsion) A sunscreen emulsion having the following composition was prepared by a conventional method.

(Composition) (% by weight) Hexaglyceryl polyricinoleate 1.50 Lipophilic treated titanium oxide / zinc oxide mixture 5.00 Liquid paraffin 5.00 Octyldodecyl myristate 5.00 Polyoxypropylene (9) di Glyceryl ether 5.00 Methylphenyl polysiloxane 5.00 Isostearic acid 1.00 Cellulose acetate powder (Cellufow TA-25, manufactured by Chisso) 1.00 Nikomulus 41 (Nikko Chemicals) 2.30 Natural vitamin E 0.001 Stearyl glycyrrhetinate 0.10 Decaglyceryl monoisostearate 2.00 Paraben 0.15 Whey 2 3.00 Sodium hyaluronate solution 3.00 1,3-butylene glycol 5.00 Glycolic acid 1.00 Lactic acid 1.00 Polyoxy Ethylene (40) monostearate 1.00 Acrylic acid / alkyl methacrylate copolymer 0.20 Sodium hydroxide Appropriate amount Perfume 0.20 Purified water Balance

Example 4 (Sunscreen) A sunscreen having the following composition was produced by a conventional method.

(Composition) (% by weight) Hexaglyceryl polyricinoleate 3.00 Mixture of lipophilic titanium oxide and zinc oxide 15.00 Liquid paraffin 7.50 Octyldodecyl myristate 5.00 Methylphenyl polysiloxane 15.00 Isostearic acid 3.00 Cellulose acetate powder (Cellufow TA-25, manufactured by Chisso) 5.60 Nikomulus 41 (Nikko Chemicals) 3.25 Natural vitamin E 0.005 Stearyl glycyrrhetinate 0.10 Decaglyceryl monoisostearate 3 .50 Paraben 0.20 Whey 2 10.00 Sodium hyaluronate 5.00 Glycerin 3.00 Glycolic acid 3.00 Lactic acid 3.00 Polyoxyethylene (40) monostearate 1.50 Acrylic acid / alkyl methacrylate Polymer 0.40 empty Nan 0.25 Sodium hydroxide qs Perfume 0.20 Purified water Balance

Each of the cosmetics obtained in Examples 3 and 4 was excellent in stability, water repellency and usability, and did not harden in physical properties.

Test Example 2 The sunscreen emulsion of the product 1 of the present invention of Example 2 and the emulsion prepared by replacing isostearic acid with palmitic acid or behenic acid in this emulsion at 5 ° C., 25 ° C. and 40 ° C. The hardness when stored for a week, SUN RHE
O METER (manufactured by SUN SCIENTIFIC)
Was measured. Table 6 shows the results.

[0037]

[Table 6]

Continued on the front page (51) Int.Cl. ⁶ Identification code FI A61K 7/48 A61K 7/48 (72) Inventor Naohito Saito 1-1-19 Higashishimbashi, Minato-ku, Tokyo Yakult Co., Ltd.

Claims (5)

[Claims] An O / W emulsion type sunscreen cosmetic comprising a polyglycerin fatty acid ester having a degree of polymerization of 4 or more, an O-alkanoyl lactic acid having 8 or more carbon atoms or a salt thereof, an inorganic pigment and spherical cellulose. 2. The O / W emulsion type sunscreen cosmetic according to claim 1, further comprising a fatty acid or a derivative thereof which is liquid at room temperature. 3. The O / W emulsion type sunscreen cosmetic according to claim 2, wherein the fatty acid which is liquid at room temperature is isostearic acid. 4. Spherical cellulose is added to inorganic pigment in an amount of 2%.
The O / W emulsion type sunscreen cosmetic according to any one of claims 1 to 3, which contains 0 to 40% by weight. 5. The O / W emulsion type sunscreen cosmetic according to claim 2, which contains 0.5 to 3% by weight of a fatty acid or a derivative thereof which is liquid at room temperature.