JPH07258055A - Anti-sunburn cosmetics - Google Patents

Abstract

PURPOSE:To obtain the cosmetics having an excellent skin sticking property and water resistance, whiteness on application of which is not conspicuous, and having an excellent UV rays absorbing activity. CONSTITUTION:An anti-sunburn cosmetics is constituted by containing an organic modified clay mineral obtained by treatment of a water swelling clay mineral with a quaternary ammonium salt type cationic surfactant and a nonionic surfactant, a hydrophobic spindle shaped titanium oxide having an average particle diameter of 0.001-0.1mum with an average ratio of major and minor axes of 2 or more, an oily component, and water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sunscreen cosmetic having good adhesion to the skin, excellent water resistance, inconspicuous whiteness during application, good feeling in use, and excellent UV absorbing ability. It is about.

[0002]

2. Description of the Related Art A water-in-oil emulsion (hereinafter referred to as W / O type) base has good water resistance and has been used for sunscreen cosmetics. Generally, the W / O type base material has a drawback that it is difficult to obtain a system excellent in temperature stability and usability. As a technique to improve this point, water swelling clay mineral is used as a quaternary ammonium salt type cationic surface active agent. There is a W / O type emulsifier composition comprising an organically modified clay mineral obtained by treating with an agent and a nonionic surfactant (JP-A-61-29033).

[0003]

Although titanium oxide has been conventionally blended as an ultraviolet ray inhibitor using this technique, if the amount of titanium oxide is increased to enhance the ultraviolet ray protection effect, the elongation tends to be high. However, there is a problem in that the coating color is noticeable in white and the natural finish feeling is impaired.

[0004]

In view of the above situation, the present inventors have found that the W / O type sunscreen cosmetics using the above-mentioned organically modified clay minerals have a white coating color and are not conspicuous and have an excellent UV protection effect. As a result of diligent studies to obtain a product, it was found that the problem can be solved by blending a hydrophobized spindle-shaped titanium oxide having an average particle size of 0.001 to 0.1 μm and an average ratio of major axis and minor axis of 2 or more, and the present invention Was completed.

That is, according to the present invention, an organically modified clay mineral obtained by treating a water-swellable clay mineral with a quaternary ammonium salt type cationic surfactant and a nonionic surfactant, and an average particle size of 0. The invention provides a sunscreen cosmetic containing 001 to 0.1 μm and a hydrophobic spindle-shaped titanium oxide having an average ratio of major axis to minor axis of 2 or more, an oil component, and water.

The structure of the present invention will be described below. The water-swellable clay mineral used in the present invention is a layered silicate mineral belonging to the genus Smectite, and generally includes montmorillonite, beidellite, nontrolite, saponite, and herculite, which are either natural or synthetic products. May be Commercially available products include Kunipia, Smecton (both Kunimine Industry), Veegum (Vanderbilt), Dimonite, tetrafluorosilicon mica (both Topy Industries), Laponite (Laporte) and the like. In carrying out the present invention, one kind or two or more kinds are arbitrarily selected from these water-swelling clay minerals. The water-swellable clay mineral is usually added in an amount of 0.2 to 5.0% by weight based on the total weight of the sunscreen cosmetic of the present invention. If it is less than 0.2% by weight, the temperature stability may be insufficient depending on the product, and if it exceeds 5.0% by weight, the viscosity of the system may increase and the usability may be poor depending on the product. is there. The quaternary ammonium salt type cationic surfactant used in the present invention is represented by the following general formula 1.

[0007]

[Chemical 1] (In the formula, R ¹ is an alkyl group having 10 to 22 carbon atoms or a benzyl group, R ² is a methyl group or an alkyl group having 10 to 22 carbon atoms, and R ³ and R ⁴ are alkyl groups having 1 to 3 carbon atoms or a hydroxy group. An alkyl group, X represents a halogen atom or a methylsulfate residue.)

Specific examples include dodecyltrimethylammonium chloride, myristyltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, aralkyltrimethylammonium chloride, behenyltrimethylammonium chloride, myristyldimethylethylammonium chloride, cetyldimethyl. Ethyl ammonium chloride, stearyl dimethyl ethyl ammonium chloride, aralkyl dimethyl ethyl ammonium chloride, behenyl dimethyl ethyl ammonium chloride, myristyl diethyl methyl ammonium chloride, cetyl diethyl methyl ammonium chloride, stearyl diethyl methyl ammonium chloride, aralkyl diethyl methyl ammonium Umium chloride, behenyldiethylmethylammonium chloride, benzyldimethylmyristylammonium chloride, benzyldimethylcetylammonium chloride, benzyldimethylstearylammonium chloride, benzyldimethylbehenylammonium chloride, benzylmethylethylcetylammonium chloride, benzylmethylethylstearylammonium chloride, distearyldimethylammonium Examples thereof include chloride, dibehenyldihydroxyethylammonium chloride, and the corresponding bromide, and also divalmitylpropylethylammonium methylsulfate.

In carrying out the present invention, one or two or more of these are arbitrarily selected. The content of the quaternary ammonium salt type cationic surfactant in the present invention is preferably 40 to 140 milliequivalents (hereinafter abbreviated as meq) with respect to 100 g of the water-swelling clay mineral, and more preferably 60 to. It is 120 meq.

The nonionic surfactant used in the present invention is
A suitable HLB can be selected depending on the oil composition used, but when a normal hydrocarbon type, ester oil or the like is used, the HLB value is within the range of 2-16, and 3-1
2 is more preferable. For example, 2 to 30 mol of polyoxyethylene is added {hereinafter abbreviated as POE (2-30). } Oleyl ether, POE (2-35) stearyl ether, POE (2-20) lauryl ether,
POE (1-20) alkyl phenyl ether, POE
(6-18) Behenyl ether, POE (5-25) 2
-Decyl pentadecyl ether, POE (3-30) 2
-Decyl tetradecyl ether, POE (8-16) 2
-Ether type activators such as octyl decyl ether, and POE (4-60) hydrogenated castor oil, POE (3-1
4) Ester type activators such as fatty acid monoester, POE (6-30) fatty acid diester, POE (5-20) sorbitan fatty acid ester, POE (2-30) glyceryl monoisostearate, POE (10-60) Glyceryl triisostearate, POE (7-50) hydrogenated castor oil monoisostearate, POE (12-6
0) Ethylene oxide addition type surfactants such as ether ester type activators such as hydrogenated castor oil triisostearate, and decaglyceryl tetraoleate, hexaglyceryl triisostearate, tetraglyceryl diisostearate, diglyceryl diisostearate Examples thereof include polyhydric alcohol fatty acid ester type surfactants such as polyglycerin fatty acid ester such as rate, glyceryl monostearate, glyceryl monoisostearate, glyceryl fatty acid ester such as glyceryl monooleate, and the like. Among these, polyglycerin fatty acid esters of triglycerin or more such as decaglyceryl tetraoleate, hexaglyceryl triisostearate, tetraglyceryl diisostearate, POE (2-12) oleyl ether, POE (3-12) stearyl ether , POE
(2-10) lauryl ether, POE (2-10) nonylphenyl ether, POE (6-15) behenyl ether, POE (5-20) 2-decylpentadecyl ether, POE (5-17) 2-decyltetra POE-added ether type activators such as decyl ether, POE (8-16) 2-octyldecyl ether, and POE (1
0-20) hydrogenated castor oil, POE (5-14) oleic acid monoester, POE (6-20) oleic acid diester, POE (5-10) sorbitan oleic acid ester and other POE addition ester type activators, POE ( 3-1
5) Glyceryl monoisostearate, POE (10-
40) Particularly preferred are ethylene oxide addition type nonionic surfactants such as POE addition ether ester type activators such as glyceryl toluisostearate.

When a silicone oil such as dimethylpolysiloxane, methylphenylsiloxane, methylhydrogenpolysiloxane, higher fatty acid-modified organosiloxane, higher alcohol-modified organopolysiloxane, or trimethylsiloxysilicate is used as the oil component,
It is preferable to use the polyoxyalkylene-modified organopolysiloxane represented by the following general formulas 2, 3, 4, and 5.

[0012]

[Chemical 2]

[0013]

[Chemical 3]

[0014]

[Chemical 4]

[0015]

[Chemical 5]

(In the formula, R is an alkyl group having 1 to 3 carbon atoms or a phenyl group, R'is hydrogen, or 1 to 1 carbon atoms.
An alkyl group of 2, p is an integer of 1 to 5, m is 5 to 10
An integer of 0, n and x are integers of 1 to 50, t and y
Is an integer of O to 50. )

When silicone oil is used in the oil phase, it is preferable that the polyoxyalkylene-modified organopolysiloxane has a polyoxyalkylene group content of 5 to 40% by weight. If it is less than 5% by weight, the polyoxyalkylene-modified organopolysiloxane will dissolve in the silicone oil and no sufficient effect will be obtained, and if it exceeds 40% by weight, the hydrophilicity will increase, which is not preferable.

The content of the nonionic surfactant is preferably 75 to 2000 g, more preferably 100 to 1500 g, based on 100 g of the water-swelling clay mineral. The content of the organically modified clay mineral is 0.25 to 5% by weight, and further 0.5 to 3% by weight based on the total amount of the sunscreen cosmetic according to the present invention.
Is preferred.

The organically modified clay mineral in the present invention includes, for example, a water-swellable clay mineral, a quaternary ammonium salt type cationic surfactant and a nonionic surfactant in a low boiling point solvent such as water, acetone or lower alcohol. Or a water-swellable clay mineral and a quaternary ammonium salt type cationic surfactant are treated in advance in a low boiling point solvent to obtain a cation-modified clay mineral, and then treated with a nonionic surfactant. It is obtained by treating and then removing the low boiling solvent. In the latter case, a commercially available cation-modified clay mineral obtained by previously treating a water-swellable clay mineral and a quaternary ammonium salt type cationic surfactant may be used. If the mixing ratio of the water-swelling clay mineral and the quaternary ammonium salt type cationic surfactant is to be adjusted to control the viscosity, it is more versatile to mix them individually.

Further, in the method for producing a sunscreen cosmetic of the present invention, a water-swellable clay mineral is previously treated with a quaternary ammonium salt type cationic surfactant and a nonionic surfactant, and then mixed with oil. It may be thickened and emulsified in the water phase, or by adding a water-swelling clay mineral to the water phase and sufficiently swelling and dispersing the quaternary ammonium salt type cationic surfactant in the oil phase. The agent and the nonionic surfactant may be added, and the mixture may be uniformly dissolved and then emulsified.

The hydrophobized spindle-shaped titanium oxide used in the present invention preferably has an average particle size of 0.001 to 0.1 μm and an average ratio of major axis to minor axis of 2 or more. More preferably, the average particle size is 0.003 to 0.08 μm, and the average ratio of long diameter to short diameter is 3 to 20.

Such spindle-shaped titanium oxide has, for example, an average particle diameter of 0.004 to 0.05 μm, an average ratio of major axis to minor axis of 5 to 15, a specific surface area of 40 to 120 m ² / g, a squalane oil absorption amount of 53 ml / 100 g, There is a fine titanium oxide 100-T, which is a titanium oxide whose surface is treated with a higher fatty acid and hydrated alumina, sold by Teikoku Kako Co., Ltd.

As the surface treatment method of titanium oxide, for example, oil treatment to make titanium oxide lipophilic by adsorbing fats and oils on the surface of titanium oxide or utilizing functional groups such as hydroxyl groups to cause esterification and etherification. Method, a metal soap treatment method using a zinc salt or a magnesium salt of a fatty acid, a silicone treatment method using dimethylpolysiloxane or methylhydrogenpolysiloxane, a treatment method with a fluorine compound having a perfluoroalkyl group, and the like.

In the present invention, the blending amount of the hydrophobized spindle-shaped titanium oxide can be changed according to the dosage form, but it should be blended in the cosmetic in an amount of 0.05 to 60% by weight, particularly 1 to 25% by weight. Is desirable. If the amount is less than 0.05% by weight, the effect of preventing ultraviolet rays is poor, and if the amount is more than 60% by weight, titanium agglomerates or the like, which may deteriorate the usability.

In the present invention, a resin powder may be added as a powder. When a large amount of hydrophobized spindle-shaped titanium oxide is blended, the UV protection effect is enhanced, but a squeaky feeling may occur during application, and blending a resin powder improves this point. Examples of the resin powder include nylon powder, polymethylmethacrylate, styrene-divinylbenzene copolymer, polyethylene powder, polymethylsilsesquioxane powder, porous vinyl polymer, acrylate copolymer and the like. Among these, nylon powder, polymethylmethacrylate, polyethylene powder and polymethylsilsesquioxane powder are preferable, and polymethylsilsesquioxane powder is particularly preferable. The resin powder may be hydrophobized. The hydrophobic treatment method is to adsorb oil or fat on the powder surface, or to utilize ester groups or etherification by utilizing functional groups such as hydroxyl groups to make the resin powder lipophilic, and zinc salts or magnesium salts of fatty acids. And a method for treating with a fluorine compound having a perfluoroalkyl group, and the like.

The spherical shape of these resin powders is more effective in improving the squeaky feeling. The blending amount is 0.01 to 40% by weight, preferably 1 to 40% by weight based on the total amount of the sunscreen cosmetic of the present invention.
It is 20% by weight.

If desired, the sunscreen cosmetic of the present invention may contain an ultraviolet absorber and an ultraviolet scattering agent other than the hydrophobized spindle-shaped titanium oxide. The UV absorbers used in the present invention include cinnamic acid-based UV absorbers such as octyl methoxycinnamate, benzophenone-based UV absorbers such as benzophenone such as 2-hydroxy-4-methoxybenzophenone, and PABA-based such as octyl dimethyl PABA. UV absorbers, salicylic acid type UV absorbers such as octyl salicylate, camphor type UV absorbers such as methylbenzylidene camphor, dibenzoylmethane type UV absorbers, benzimidazole type UV absorbers, benztriazole type UV absorbers, menthylanthrani There are anthranil derivatives such as rate.

The sunscreen cosmetics of the present invention include cosmetics,
All common oil components used in pharmaceuticals and the like can be used. Examples of oils include liquid paraffin, squalane, petrolatum, hydrocarbon oils such as microcrystalline wax, isopropyl myristate, cetyl isooctanoate, ester oils such as glyceryl trioctanoate, octamethyltetrasiloxane, decamethyl. Silicone oils such as pentasiloxane, dimethylpolysiloxane, methylphenylpolysiloxane, soft rubbery dimethylpolysiloxane, terminal hydroxyl group-containing dimethylpolysiloxane, terminal hydroxyl group-containing methylphenylpolysiloxane, and other polymeric silicones, lanolin, beeswax , Olive oil, coconut oil, safflower oil, castor oil, cottonseed oil, jojoba oil, carnauba wax, macadamia nut oil, fatty acids and higher alcohols.

The blending amount of these oil components is about 5 to 90% by weight based on the total amount of the sunscreen cosmetic of the present invention, and is 10 to 80%.
Weight percent is preferred.

In addition to the above, the sunscreen cosmetic of the present invention may optionally contain amino acids and salts thereof, lower alcohols, polyhydric alcohols, mucopolysaccharides, moisturizers, thickeners and thickeners as long as the effects of the present invention are not impaired. Agents, preservatives, antioxidants, sequestering agents, pH regulators, antiphlogistics, drugs such as vitamins and hormones, crude drugs, astringents, pigments, dispersants, and fragrances can be added.

[0031]

EFFECT OF THE INVENTION The sunscreen cosmetic of the present invention has good adhesion to the skin, excellent water resistance, whiteness during application is inconspicuous, a good feeling in use, and an excellent UV protection ability. Therefore, the problems that have been caused by the conventional use of titanium oxide are solved at once. That is, since the whiteness of the coating color is not conspicuous, the amount of titanium oxide can be increased, and the ultraviolet protection effect is significantly improved as compared with the case of using conventional titanium oxide. W by organically modified clay mineral
Combined with the characteristics of the / O-type base, the adhesiveness to the skin and water resistance are excellent and the feeling of use is good compared to the usual W / O-type base. The sunscreen cosmetic of the present invention is useful when a particularly high UV protection effect is expected.

[0032]

The present invention will be described in more detail with reference to Examples. The present invention is not limited to this. The hydrophobized spindle-shaped titanium oxide used in the examples has an average particle size of 0.003 to 0.08 μm and an average ratio of major axis to minor axis of 3 to 20. The blending amount of each component is% by weight.

Example 1 (Sunscreen cream) (1) Decamethylcyclopentasiloxane 36.6 (2) Liquid paraffin 5.0 (3) Polyoxyalkylene-modified organopolysiloxane 1.5 (4) Distearyldimethylammonium Chloride 0.6 (5) Octyl methoxycinnamate 5.0 (6) Paraben proper amount (7) Perfume proper amount (8) Hydrophobic spindle-shaped titanium oxide 10.0 (9) Ion-exchanged water 30.0 (10) Glycerin 10.0 (11) Smecton 1.0 Manufacturing methods (1) to (7) are heated to 70 ° C., mixed and dissolved to prepare an oil phase in advance. Next, (8) is added and dispersed and mixed with a disper. (9) to (11) were dispersed and mixed at 70 ° C., then gradually added to the oil phase while stirring with a disper, and mixed and stirred sufficiently uniformly to cool to obtain a desired sunscreen cream.

Comparative Example 1 In Comparative Example 1, a comparative product (average particle size 0.03 to 0.04 μ, average ratio of diameter to minor axis of 1.3) was used in place of the hydrophobized weight-preventing titanium oxide. A sunscreen cream was produced in the same manner as in Example 1.

Example 2 (Sunscreen cream) (1) Decamethylcyclopentasiloxane 26.6 (2) Liquid paraffin 5 (3) Polyoxyalkylene-modified organopolysiloxane 1.5 (4) Distearyldimethylammonium chloride 0 .6 (5) Octyl methoxycinnamate 5 (6) Paraben proper amount (7) Perfume proper amount (8) Hydrophobized spindle-shaped titanium oxide 10 (9) Polymethylsilsesquioxane 10 (10) Deionized water 30 ( 11) Glycerin 10 (12) Smecton 1 Manufacturing methods (1) to (7) are heated to 70 ° C., mixed and dissolved to prepare an oil phase in advance. Next, (8) and (9) are added and dispersed and mixed with a disper. (10) to (12) were dispersed and mixed at 70 ° C., then gradually added to the oil phase while stirring with a disper, and mixed and stirred sufficiently uniformly to cool to obtain a desired sunscreen cream.

Example 3 (Cream foundation) (1) Decamethylcyclopentasiloxane 30.5 (2) Liquid paraffin 10 (3) Polyoxyalkylene-modified organopolysiloxane 0.15 (4) Benzyldimethylstearyl ammonium chloride 0 .05 (5) Octyl methoxycinnamate 8 (6) Paraben proper amount (7) Perfume proper amount (8) Hydrophobized spindle-shaped titanium oxide 0.05 (9) Talc 15 (10) Color pigment proper amount (11) Ion Exchanged water 30 (12) Glycerin 5 (13) Smecton 0.2 The manufacturing methods (1) to (7) are heated and mixed at 70 ° C. to dissolve them, and the oil phase is adjusted in advance. Next, add (8), (9), (10),
Disperse and mix with a disper. 70 from (11) to (13)
The mixture was dispersed and mixed at 0 ° C., then gradually added to the oil phase while stirring with a disper, and mixed and stirred sufficiently uniformly to cool to obtain a desired creamy foundation.

Example 4 (sunscreen cream) (1) Liquid paraffin 40 (2) Glyceryl triisostearate 1 (3) Distearyl dimethyl ammonium chloride 0.05 (4) Octyl methoxycinnamate 5 (5) 2 Hydroxy 4-methoxybeenzophenone 2 (6) Paraben proper amount (7) Perfume proper amount (8) Hydrophobicized spindle-shaped titanium oxide 1 (9) Ion-exchanged water 39.15 (10) 1,3-butylene glycol 5 ( 11) Veegum 0.4 Preparation methods (1) to (7) are heated to 70 ° C, mixed and dissolved to prepare an oil phase in advance. Next, (8) is added and dispersed and mixed with a disper. (9) to (11) were dispersed and mixed at 70 ° C., then gradually added to the oil phase while stirring with a disper, and mixed and stirred sufficiently uniformly to cool to obtain a desired sunscreen cream.

Example 5 Sunscreen Cream (1) Decamethylcyclopentasiloxane 31.4 (2) Polyoxyalkylene-modified organopolysiloxane 2 (3) Paraben in appropriate amount (4) Perfume in appropriate amount (5) Benton 381 ( 6) Hydrophobized spindle-shaped titanium oxide 20 (7) Polymethylsilsesquioxane 5 (8) Ion-exchanged water 30 (9) Glycerin 10 Manufacturing methods (1) to (4) are heated and mixed at 70 ° C to dissolve them, and oil is prepared in advance. Adjust the phase. Next, (5) and (6) are added and dispersed and mixed with a disper. (7) to (9) were dispersed and mixed at 70 ° C., then gradually added to the oil phase while stirring with a disper, and mixed and stirred sufficiently uniformly to cool to obtain a desired sunscreen cream. The Benton 38 is a montmorillonite 1
It is an organically modified clay mineral obtained by treating 00 g with 100 meg of distearyldimethylammonium chloride.
(Made by National Red Co., USA)

Example 6 (1) Squalane 30.7 (2) POE (10 mol) glycerol triisostearate 2 (3) Benzyldimethylbehenylammonium chloride 0.8 (4) Paraben proper amount (5) Perfume proper amount (6) Hydrophobized spindle-shaped titanium oxide 25 (7) Ion-exchanged water 30 (8) Glycerin 10 (9) Laponite 1.2 Manufacturing method (1) to (5) are heated and mixed at 70 ° C. to dissolve the oil phase in advance. Adjust it. Next, (6) is added and dispersed and mixed with a disper. (7) to (9) were dispersed and mixed at 70 ° C., then gradually added to the oil phase while stirring with a disper, and mixed and stirred sufficiently uniformly to cool to obtain a desired sunscreen cream.

Example 7 (1) Squalane 20.7 (2) Glycerol monoisostearate 8 (3) Distearyldimethylammonium chloride 3 (4) Octylmethoxycinnamate 3 (5) 2-Hydroxy-4-methoxybeenzo Phenone 1 (6) Paraben proper amount (7) Perfume proper amount (8) Hydrophobized spindle-shaped titanium oxide 40 (9) Ion-exchanged water 30 (10) Glycerin 5 (11) Smecton 5 Preparation method (1) to (7) It is heated to 70 ° C., mixed and dissolved to prepare an oil phase in advance. Next, (6) is added and dispersed and mixed with a disper. (9) to (11) were dispersed and mixed at 70 ° C., then gradually added to the oil phase while stirring with a disper, and mixed and stirred sufficiently uniformly to cool to obtain a desired sunscreen cream.

Comparative Example 2 (1) Liquid paraffin 10 (2) Glyceryl monostearate 2 (3) Cetanol 1 (4) Stearic acid 1 (5) Palmitic acid 1 (6) Octyl methoxycinnamate 5 (7) Paraben Suitable Quantity (8) Fragrance Suitable quantity (9) 1,3-Butylene glycol 10 (10) Montmorillonite 2 (11) Triethanolamine 1 (12) Ion-exchanged water 55.8 (13) Titanium oxide 10 (Average particle size of 0. 03-0.04μ, average ratio of major axis to minor axis 1.3) Manufacturing method (1) to (8) oil phase and (9) to (12) aqueous phase are respectively heated to 70 ° C. and completely dissolved. . Add the oil phase to the water phase and emulsify with an emulsifier. The emulsion was cooled using a heat exchanger to obtain a cream.

Example 8 (1) Squalane 44.495 (2) Cetylisooctanoate 10 (3) Diglyceryl diisostearate 0.06 (4) Distearyldimethylammonium chloride 0.015 (5) Paraben Suitable Amount (6) Perfume proper amount (7) Hydrophobized spindle-shaped titanium oxide 0.03 (8) Ion-exchanged water 35 (9) Glycerin 10 (10) Kunipia 0.1 Manufacturing method (1) to (6) at 70 ° C Heat and dissolve to dissolve, and adjust the oil phase in advance. Next, (7) is added and dispersed and mixed with a disper. (8) to (10) were dispersed and mixed at 70 ° C., then gradually added to the oil phase while stirring with a disper, and mixed and stirred sufficiently uniformly to cool to obtain a target cream.

Example 9 (1) Decamethylcyclopentasiloxane 10.7 (2) Polyoxyalkylene-modified organopolysiloxane 2 (3) Benzyldimethylstearylammonium chloride 8 (4) Paraben proper amount (5) Perfume proper amount (6) Hydrophobized spindle-shaped titanium oxide 65 (7) Ion-exchanged water 5 (8) Glycerin 2 (9) Smecton 7 Manufacturing method (1) to (5) are heated and mixed at 70 ° C. and dissolved to prepare an oil phase in advance. Keep it. Next, (6) is added and dispersed and mixed with a disper. (7) to (9) were dispersed and mixed at 70 ° C., and then gradually added to the oil phase while stirring with a disper, and mixed and stirred sufficiently uniformly to cool to obtain a target cream.

(1) Evaluation of Stability <Evaluation Method> Samples were stored at 50 ° C., 25 ° C. and 0 ° C. for 1 month, and the stability was observed. <Evaluation criteria> No separation is observed at all: ◎ A slight separation of liquid phase (oil phase or water phase) is observed: ○ Separation of liquid phase (oil phase or water phase) occurs: △ Significant separation of liquid phase Was recognized: ×

(2) Evaluation of whiteness at the time of application <Evaluation method> Evaluation of the whiteness at the time of application was performed by 20 expert panelists. <Evaluation Criteria> 16 or more out of 20 answered good: ◎ 12 or more out of 20 answered good: ○ 6 or more out of 20 answered good: △ Less than 6 out of 20 Answered good: ×

(3) Evaluation of Water Resistance <Evaluation Method> Each sample was applied by 20 expert panelists for evaluation, and after 2 hours, water washing was performed to evaluate water resistance. <Evaluation Criteria> 16 or more out of 20 answered good: ◎ 12 or more out of 20 answered good: ○ 6 or more out of 20 answered good: △ Less than 6 out of 20 Answered good: ×

(4) Evaluation of Adhesion to Skin <Evaluation Method> Each sample was applied by 20 expert panelists to evaluate the adhesion to skin. <Evaluation Criteria> 16 or more out of 20 answered good: ◎ 12 or more out of 20 answered good: ○ 6 or more out of 20 answered good: △ Less than 6 out of 20 Answered good: ×

(5) Evaluation of sunburn prevention effect <Evaluation method> Evaluation panel 20 persons evaluated the sunburn prevention effect by using the samples on sunny days in June and July when the ultraviolet rays were strong. <Evaluation Criteria> 16 or more out of 20 answered good: ◎ 12 or more out of 20 answered good: ○ 6 or more out of 20 answered good: △ Less than 6 out of 20 Answered good: × Table 1 shows the results of evaluation by the above method for Examples 1 to 9 and Comparative Examples 1 and 2.

[0049]

[Table 1]

As is clear from the results in Table 1, the product of the present invention was a sunscreen cosmetic which was more noticeable in whiteness at the time of application, more excellent in water resistance and more stable in temperature than the comparative product. In addition, Examples 2 and 5 containing the resin powder had no squeaky feeling in usability.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenzo Ito 1050 Shinba-cho, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Shiseido Research Center No. 1

Claims (5)

[Claims] 1. An organically modified clay mineral obtained by treating a water-swellable clay mineral with a quaternary ammonium salt type cationic surfactant and a nonionic surfactant, and having an average particle size of 0.00.
A sunscreen cosmetic comprising 1 to 0.1 μm and a hydrophobic spindle-shaped titanium oxide having an average ratio of major axis to minor axis of 2 or more, an oil component, and water. 2. The content of the quaternary ammonium salt type cationic surfactant is 40 to 100 g with respect to 100 g of the water-swelling clay mineral.
The sunscreen cosmetic according to claim 1, which has an amount of 140 meq. 3. The sunscreen cosmetic according to claim 1 or 2, wherein the content of the nonionic surfactant is 75 to 2000 g based on 100 g of the water-swelling clay mineral. 4. The content of hydrophobized spindle-shaped titanium oxide is 0.0.
The sunscreen cosmetic according to claims 1 to 3, which is 5 to 60% by weight. 5. The sunscreen cosmetic according to claim 1, further comprising a resin powder.