Matt-effect composition comprising hydrophobic aerogel particles and silicone elastomer particles

Abstract

The present invention relates to a cosmetic and/or dermatological composition comprising, in a physiologically acceptable medium: a) at least some hydrophobic aerogel particles, b) at least some silicone elastomer particles, c) at least one particle that absorbs sebum. The invention also relates to a process for making the skin matt and/or for reducing its shine.

Claims

1. A cosmetic and/or dermatological composition comprising, in a physiologically acceptable medium: a sebum absorbing component consisting of: a) from 0.5% to 5% by weight relative to the total weight of the composition of hydrophobic silica aerogel particles, b) from 0.20% to 5% by weight relative to the total weight of the composition of non-emulsifying silicone elastomer particles different than the particles c), and c) from 0.5% to 10% by weight relative to the total weight of the composition of particles that absorb sebum different than the particles a) and b) and being chosen from silica powders, and powders of acrylic polymers, and mixtures thereof, and wherein the said composition also comprises at least one aqueous phase.

2. The cosmetic composition according to claim 1, in which the hydrophobic silica aerogel particles have a specific surface area per unit of mass ranging from 200 to 1500 m.sup.2/g.

3. The cosmetic composition according to claim 1, in which the hydrophobic silica aerogel particles have a specific surface area per unit of mass ranging from 600 to 1200 m.sup.2/g.

4. The cosmetic composition according to claim 1, in which the hydrophobic silica aerogel particles have a size, expressed as the volume-mean diameter, ranging from 5 to 25 μm.

5. The cosmetic composition according to claim 1, in which the hydrophobic silica aerogel particles have a tapped density ranging from 0.02 g/cm.sup.3 to 0.10 g/cm.sup.3.

6. The cosmetic composition according to claim 1, in which the hydrophobic silica aerogel particles have a specific surface area per unit of volume ranging from 5 to 60 m.sup.2/cm.sup.3.

7. The cosmetic composition according to claim 1, in which the hydrophobic silica aerogel particles have an oil-absorbing capacity, measured at the wet point, ranging from 5 to 18 ml/g.

8. The cosmetic composition according to claim 1, in which the hydrophobic silica aerogel particles are inorganic particles.

9. The cosmetic composition according to claim 1, wherein the silicone elastomer particles are obtained by polymerization of organopolysiloxane having at least two hydrogen atoms each bound to a silicon atom and of an organopolysiloxane comprising at least two ethylenically unsaturated groups in the presence of a platinum catalyst.

10. The cosmetic composition according to claim 1, which also comprises at least one active agent for caring for oily skin chosen from desquamating agents, antimicrobial agents, anti-inflammatory agents, sebum regulators and antioxidants.

11. The cosmetic composition according to claim 2, in which the hydrophobic silica aerogel particles have a specific surface area per unit of mass ranging from 600 to 1200 m.sup.2/g.

12. The cosmetic composition according to claim 2, in which the hydrophobic silica aerogel particles have a size, expressed as the volume-mean diameter, ranging from 5 to 25 μm.

13. The cosmetic composition according to claim 1, wherein the particles that absorbs sebum different than the particles a) and b) are chosen from silica powders.

Description

EXAMPLES

Example 1

(1) A facial-care cream in the form of an oil/water emulsion having the composition below was prepared:

(2) TABLE-US-00002 INCI name (EU) In weight % STEARYL ALCOHOL 0.7 GLYCERYL STEARATE 1 POLYACRYLAMIDE (Sepigel 0.25 305 by Seppic) GLYCERINE 7 ISONONYL ISONONANOATE 5 DIMETHICONE 5 CETEARYL ALCOHOL 2.5 Water Qs for 100 CAPRYLOYL SALICYLIC ACID 0.11 GLYCERYL STEARATE 3 OLETH-10 1 PEG-100 STEARATE 1

(3) In this base, the same combinations of fillers according to the invention were used as below.

(4) This composition may be applied in the morning and/or evening to the face to make combination skin and oily skin matt.

Example 2

Measuring Mattness/Shine

(5) Base Formula

(6) TABLE-US-00003 In % AM Isopropyl N-lauroylsarcosinate (Eldew SL 205 from 5 Ajinomoto) Triblock copolymer of ethylene oxide, propylene oxide 1 and ethylene oxide (128 EO/54 PO/128 EO) (Synperonic PE/F 108 from Croda) Glycerol 5 Ammonium polyacryldimethyltauramide (Hostacerin 1.56 AMPS ® from Clariant) Phenoxyethanol 0.3 Hexyl laurate 5 Caprylyl glycol 0.3 Xanthan gum 0.1 Water qs for 100

(7) In this base, the contents of the 3 fillers are varied between 0 and 0.5%. The total filler content remains constant (0.5%).

(8) Then the mattness of the formula after application is measured (immediately and in the long term).

(9) Examples for a total filler content of 0.5%

(10) TABLE-US-00004 Mattness Content performance Fillers Silica silylate (VM-2270 Aerogel Fine 0.5 + Particles from Dow Corning) Ethylene glycol dimethacrylate/lauryl 0.5 + methacrylate copolymer (Polytrap 6603 Adsorber) Perlite 0.5 + Silicone elastomer (KSG 16) 0.5 0 Silica (Acematt OK 412) 0.5 0 Combinations Aerogel-Silicone elastomer 0.25%- + 0.25% Aerogel-Silicone elastomer- 0.17%- +++ Polytrap 0.17%- 0.17% Aerogel-Silicone elastomer- 0.17%- +++ Silica 0.17%- 0.17% Aerogel-Silicone elastomer- 0.17%- +++ Perlite 0.17%- 0.17% Aerogel-Silicone elastomer- 0.17%- +++ Expancel 0.17%- 0.17%

(11) Measuring Mattness by In Vitro Assessment

(12) The mattness obtained with composition A according to the invention, and with composition B given as a comparison example, is measured by using a contrast card (Prufkarte type 24/5-250 cm.sup.2) sold by Erichsen. The composition has been spread at 2 mg/cm.sup.2 using a mechanical film-stretcher. A mixture was sprayed 10 times (water/sebum 80/20), then there was a 6-minute wait at room temperature, then reflection was measured using a gonioreflectometer. The result obtained is the ratio R between the specular reflection and the diffuse reflection. The value of R is proportionately smaller the greater the mattifying effect.

(13) −: shine

(14) 0: no effect

(15) +: matt

(16) ++: matt+

(17) +++: very matt

(18) These results show that the composition according to the invention delivers skin shine less than that obtained by a composition containing each of the particles taken in isolation at the same total concentration.