Composition with a continuous oil phase containing at least one lipophilic organic UV-screening agent and hydrophobic silica aerogel particles
The present invention relates to a composition comprising, in a cosmetically acceptable medium, at least one continuous oil phase, characterized in that the oil phase comprises a) at least one non-volatile non-cyclic silicone oil with a viscosity at 25° C. ranging from 4 to 5000 mm 2 /s, better still from 4 to 1000 mm 2 /s and even better still from 4 to 200 mm 2 /s and b) at least one lipophilic organic UV-screening agent; and c) hydrophobic silica aerogel particles with a specific surface area per unit of mass (SM) ranging from 200 to 1500 m 2 /g, preferably from 600 to 1200 m 2 /g and better still from 600 to 800 m 2 /g, and a size, expressed as the volume mean diameter (D[0.5]), of less than 1500 μm, preferably ranging from 1 to 30 μm, more preferentially from 5 to 25 μm, better still from 5 to 20 μm and even better still from 5 to 15 μm. The invention also relates to a cosmetic process for caring for and/or making up human keratin materials, especially bodily or facial skin or the hair, comprising at least the application to the surface of the keratin material of at least one composition as defined previously.
1. A homogenous and matt composition comprising, in a cosmetically acceptable medium, at least one continuous oil phase, wherein the oil phase comprises
a) 5 to 60% by weight based upon the weight of the composition of at least one non-cyclic silicone oil with a viscosity at 25° C. ranging from 4 to 5000 mm 2 /s and having a vapour pressure of less than 10 −3 mmHg (0.13 Pa), wherein said non-cyclic silicone oil is a dimethicone represented by formula (II) below:
where x in formula (II) is an integer ranging from 1 to 50,
b) 5% to 40% of at least one lipophilic organic UV-screening agent selected from the group consisting of butylmethoxydibenzoylmethane, octocrylene, ethylhexyl salicylate, n-hexyl 2-(4-diethylamino-2-hydroxybenzoyl)benzoate,
bis(ethylhexyloxyphenyl)methoxyphenyltriazine, ethylhexyl triazone, diethylhexyl butamido triazone, drometrizole trisiloxane, and mixtures thereof; and
c) hydrophobic silica aerogel particles with a specific surface area per unit of mass (SM) ranging from 600 to 1200 m 2 /g and a size, expressed as the volume mean diameter (D[0.5]), of 5 to 20 μm, wherein the amount of the hydrophobic silica aerogel particles is 0.5 to 10% by weight based upon the weight of the composition.
2. The composition according to claim 1 , in the form of an anhydrous composition or a water-in-oil emulsion.
3. The composition according to claim 1 , wherein the hydrophobic silica aerogel particles have a size, expressed as the volume mean diameter, ranging from 5 to 15 μm.
4. The composition according to claim 1 , wherein the hydrophobic silica aerogel particles have a tamped density ρ ranging from 0.04 g/cm 3 to 0.10 g/cm 3 .
5. The composition according to claim 1 , wherein the hydrophobic silica aerogel particles have a specific surface area per unit volume SV ranging from 5 to 60 m 2 /cm 3 .
6. The composition according to claim 1 , wherein the hydrophobic silica aerogel particles have an oil-absorbing capacity, measured at the wet point, ranging from 5 to 18 ml/g of particles.
7. The composition according to claim 1 , wherein the hydrophobic silica aerogel particles are silica particles modified with trimethylsilyl groups.
8. The composition according to claim 1 , also comprising at least one insoluble UV-screening agent selected from the group consisting of insoluble organic UV-screening agents, inorganic UV-screening agents and composite materials comprising an organic or inorganic matrix and at least one inorganic UV-screening agent.
9. The composition according to claim 1 , also comprising an additional filler.
10. The composition according to claim 1 , also comprising at least one colouring agent selected from the group consisting of pigments, nacres, water-soluble or liposoluble dyes, and agents for promoting the naturally pinkish colouration of the skin, and mixtures thereof.
11. The composition according to claim 1 , in the form of a water-in-oil emulsion also comprising at least one hydrophilic UV-screening agent.
12. A cosmetic process for caring for and/or making up human keratin materials, especially bodily or facial skin or the hair, comprising at least the application to the surface of the keratin material of at least one composition as defined according to claim 1 .
13. The composition according to claim 2 , wherein the hydrophobic silica aerogel particles have a size, expressed as the volume mean diameter, ranging from 5 to 15 μm.
14. The composition according to claim 2 , wherein the hydrophobic silica aerogel particles have a tamped density ρ ranging from 0.04 g/cm 3 to 0.10 g/cm 3 .
15. The composition according to claim 3 , wherein the hydrophobic silica aerogel particles have a tamped density ρ ranging from 0.04 g/cm 3 to 0.10 g/cm 3 .
16. The composition according to claim 2 , wherein the hydrophobic silica aerogel particles have a specific surface area per unit volume SV ranging from 5 to 60 m 2 /cm 3 .
17. The composition according to claim 3 , wherein the hydrophobic silica aerogel particles have a specific surface area per unit volume SV ranging from 5 to 60 m 2 /cm 3 .
18. The composition according to claim 4 , wherein the hydrophobic silica aerogel particles have a specific surface area per unit volume SV ranging from 5 to 60 m 2 /cm 3 .
19. The composition according to claim 1 , wherein the amount of the hydrophobic silica aerogel particles is 1 to 10% by weight based upon the weight of the composition.
20. The composition according to claim 1 , wherein x in formula (II) is an integer ranging from 1 to 20.
21. The composition according to claim 1 , wherein x in formula (II) is an integer ranging from 1 to 10.
22. The composition according to claim 1 , wherein the hydrophobic silica aerogel particles have a specific surface area per unit of mass (SM) ranging from 600 to 800 m 2 /g.
23. The composition according to claim 22 , wherein the hydrophobic silica aerogel particles have a size, expressed as the volume mean diameter (D[0.5]), of 5 to 15 μm.