SOAP BASED SUNSCREEN COMPOSITION

Abstract

The present invention relates to a composition comprising: a) one or more fatty acids selected from the group consisting of straight or branched saturated fatty acids in C.sub.8-C.sub.30, b) at least one basic agent, c) at least one lipophilic UV absorption agent, d) at least hydrophobic silica aerogel particles, and e) at least one aqueous phase.

Claims

1. A composition Composition comprising: a) one or more fatty acids selected from the group consisting of C.sub.8-C.sub.30 straight or branched saturated fatty acids, b) at least one basic agent, c) at least one lipophilic UV absorption agent, d) at least hydrophobic silica aerogel particles, and e) at least one aqueous phase.

2. The composition according to claim 1, wherein the fatty acid is a C.sub.12-C.sub.22 fatty acid.

3. The composition according to claim 1, wherein the fatty acid is stearic acid.

4. The composition according to claim 1, wherein the basic agent is selected from the group consisting of alkali metal hydroxides, alkaline earth metal hydroxides, ammonium hydroxide, organic bases, and mixtures thereof.

5. The composition according to claim 4, wherein the basic agent is an amine or an alkanolamine, such as triethanolamine.

6. The composition according to claim 1, wherein the fatty acid is stearic acid and the basic agent is triethanolamine.

7. The composition according to claim 1, wherein the lipophilic UV absorption agent is selected from the group consisting of dibenzoylmethane derivatives, β,β-diphenylacrylate derivatives, phenyl benzotriazole derivatives, and mixtures thereof.

8. The composition according to claim 1, further comprising at least one hydrophilic UV absorption agent.

9. The composition according to claim 1, wherein the hydrophobic silica aerogel particles are silylated silica aerogel particles.

10. The composition according to claim 1, further comprising at least one skin lightening agent.

11. The composition according to claim 1, further comprising at least one filler other than d).

12. The composition according to claim 11, wherein the filler other than d) is selected from the group consisting of silica other than hydrophobic silica aerogel particles, starch, talc, perlite, and mixtures thereof.

13. The composition according to claim 1, comprising: from 4% to 25% of fatty acid, from 0.1% to 10% of basic agent, from 1% to 25% of UV absorption agent, from 0.1% to 20% of hydrophobic silica aerogel particles, and from 40% to 50% of water, by weight relative to the total weight of the composition.

14. The composition composition comprising, in a physiologically acceptable medium, a composition according to claim 1.

15. A non-therapeutic cosmetic method for caring and/or making up the skin, comprising the topical application to said skin of a composition according to claim 14.

16. A non-therapeutic cosmetic method for making the skin matt and/or for reducing its shine, comprising the topical application to said skin of a composition according to claim 14.

17. The composition according to claim 1, wherein the fatty acid is a C.sub.12-C.sub.20 fatty acid.

18. The composition according to claim 1, wherein the fatty acid is a C.sub.14-C.sub.18 fatty acid.

19. The composition according to claim 2, wherein the basic agent is selected from the group consisting of alkali metal hydroxides, alkaline earth metal hydroxides, ammonium hydroxide, organic bases, and mixtures thereof.

20. The composition according to claim 3, wherein the basic agent is selected from the group consisting of alkali metal hydroxides, alkaline earth metal hydroxides, ammonium hydroxide, organic bases, and mixtures thereof.

Description

EXAMPLES

[0260] Stearic acid: STEARINE TP 1200 PASTILLES by STEARINERIE DUBOIS [0261] Triethanol amine: [0262] Lipophilic Sunscreens: [0263] Butyl Methoxy Dibenzoylmethane (avobenzone): Parsol 1789 by DSM NUTRITIONAL PRODUCTS [0264] 2-ethylhexyl α-cyano-β,β′-diphenylacrylate (octocrylene): UVINUL N 539® by BASF [0265] drometrizole trisiloxane: MEXORYL XL® by CHIMEX [0266] Hydrophilic Sunscreen: [0267] phenyl benzimidazole sulphonic acid: EUSOLEX 232® by MERCK [0268] Niacinamide: Vitamin B3 by WESTERN DRUGS [0269] TiO.sub.2: Hombitan FF Pharma by SACHTLEBEN [0270] Silica silylate: Aerogel VM-2270 by DOW CORNING [0271] Silica: Sunsphere/SOLESPHERE H 51 by ASAHI GLASS

[0272] The following formulations were prepared following the standard process of soap based emulsions. The water phase was prepared at 80° C., followed by slow addition of the oil phase which was separately melted at 75-80° C. along with the sunscreens, under homogenization. Next, it was slowly allowed to cool to room temperature. At around 25-30° C., aerogel phase in the form of a finely dispersed mixture in water was introduced and further mixed under moderate speed.

[0273] According to this general procedure, partially neutralized stearic acid and triethanol amine stearate soap-based sunscreen compositions in the form of oil-in-water (O/VV) emulsions having the components and the quantities specified below were prepared.

Example 1

[0274]

TABLE-US-00001 INCI Name (EU) w/w % Stearic acid (about 53% stearic acid, 44% 9.0 palm itic acid, 3% myristic acid, by weight) Triethanolamine 0.50 Butyl Methoxy Dibenzoylmethane 3 Niacinamide 2.0 TiO.sub.2 0.25 Silica silylate 0.25 Silica 2 Water Q.S to 100

Example 2

[0275]

TABLE-US-00002 INCI Name (EU) w/w % Stearic acid 6.0 Triethanolamine 0.35 Butyl Methoxy Dibenzoylmethane 3 2-ethylhexyl α-cyano-β,β′-diphenylacrylate 4.5 Drometrizole trisiloxane 1 Phenyl benzimidazole sulphonic acid 1 Niacinamide 2.0 TiO.sub.2 0.25 Silica silylate 0.25 Silica 2 Water Q.S to 100

Example 3

[0276]

TABLE-US-00003 INCI Name (EU) w/w % Stearic acid 9 Triethanolamine 0.35 Butyl Methoxy Dibenzoylmethane 3 2-ethylhexyl α-cyano-β,β′-diphenylacrylate 4.5 Drometrizole trisiloxane 1 Phenyl benzimidazole sulphonic acid 1 Niacinamide 2.0 TiO.sub.2 0.25 Silica silylate 1 Silica 2 Water Q.S to 100

[0277] When it is applied to the skin, the compositions of examples 1, 2 and 3 according to the invention provide lower shine of the skin with respect to the same composition without silica silylate.

[0278] When it is applied to the skin, the compositions of examples 1, 2 and 3 according to the invention also reduce the production of sebum of the skin with respect to the same composition without silica silylate.

[0279] Thus, when it is applied to the skin, the composition according to the invention makes it possible to improve skin mattness, to reduce the skin shine, and to reduce the production of sebum of the skin, with respect to the composition of prior art.