Cosmetic composition

Abstract

The present invention relates to a cosmetic composition comprising: a physiologically acceptable medium that is anhydrous and non-pulverulent, including an oily phase; andmonodisperse particles suitable for forming an ordered lattice of monodisperse particles on a substrate on which the composition is applied.

Description

EXAMPLES

The proportions given are by weight, unless specified to the contrary.

Example 1

A Composition for the Lips

In the example composition described below, the compounds X and Y used are the combination of the following mixtures A and B prepared by the supplier Dow Corning:

MIXTURE A
Ingredient (INCI name)	CAS No.	Content (%)	Function
Dimethyl siloxane,	68083-19-2	55-95	Polymer
dimethylvinylsiloxy-
terminated
Silica silylate	68909-20-6	10-40	Filler
1,3-diethenyl-1,1,3,3-	68478-92-2	Trace	Catalyst
tetramethyldisiloxane
complexes
Tetramethyldivinyl-	2627-95-4	0.1-1	Polymer
disiloxane

MIXTURE B
		Content
Ingredient (INCI name)	CAS No.	(%)	Function
Dimethyl siloxane,	68083-19-2	55-95	Polymer
dimethylvinylsiloxy-
terminated
Silica silylate	68909-20-6	10-40	Filler
Dimethyl, methylhydrogen	68037-59-2	1-10	Polymer
siloxane, trimethylsiloxy
terminated

The polystyrene particles (size 216 nm, CV=3.5%, the Optibind product sold by the supplier Seradyn) were concentrated by centrifuging to obtain a concentration of 40% and then they were introduced into a square cell having a side of 4 centimeters (cm) and a height of 5 mm. The particles crystallized by settling and then the water was completely evaporated by drying.

A composition was then obtained comprising:

Polystyrene particles 35.0%
Mixture A             32.9%
Mixture B             32.1%

by using the following mode of operation.

The mixture of mixtures A and B was put into contact with polystyrene particles and allowed to react for 18 hours at 60° C.

The excess silicone elastomer above the particles was then removed. The step was repeated once more.

The resulting formulation was green in color and could be applied without drying on the lips.

Example 2

Composition for Eye Shadow

The composition had the following formulation:

Polystyrene particles            30%
Pentaerythrityl tetraisostearate 67.5%
PEG dimethicone                  2.5%

This composition can be prepared as follows.

The polystyrene particles, initially at a concentration of 10%, can be initially concentrated in aqueous solution to a concentration of 40%. The oil and the silicone wetting agent can be mixed separately and added under a small amount of stirring to form an oil-in-water emulsion. The water is then completely evaporated, progressively.

A base coat may be applied to the eyelids before the above composition.

A blue-green color is obtained after the composition has been applied.

Base Coat

The base coat has the following composition:

Ultrasol ® 2075 (Ganz Chemical)* 80%
Cab-O-Jet 200 Black Colorant**   10%
Water                            10%
*A copolymer of acrylate and ammonia methacrylate in dispersion in water at a concentration by weight of 50%.
**Carbon black having a size of 130 nm in aqueous dispersion at 20% sold by the supplier Cabot Corp.

Naturally, the invention is not limited to the examples described. In particular, other coloring agents can be added.

The term “comprising a” should be understood as being synonymous with “comprising at least one” unless specified to the contrary.

The term “lying in the range” should be understood as including the limits of the range, unless specified to the contrary.

Although the present invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims

1. A cosmetic composition comprising: a physiologically acceptable medium that is anhydrous and non-pulverulent, including an oily phase; andmonodisperse particles suitable for forming an ordered lattice of monodisperse particles on a substrate on which the composition is applied.

2. A composition according to claim 1, the medium including at least one volatile oil.

3. A composition according to claim 1, including at least 15% by weight of monodisperse particles relative to the total weight of the composition.

4. A composition according to claim 1, in which the content of monodisperse particles by weight is strictly greater than 20% by weight relative to the total weight of the composition.

5. A composition according to claim 4, in which the content by weight of monodisperse particles is greater than or equal to 25% by weight relative to the total weight of the composition.

6. A composition according to claim 1, in which the ratio by weight of the oily phase over the total weight of particles present in the composition is greater than 0.5.

7. A composition according to claim 6, in which said ratio is greater than 0.75.

8. A composition according to claim 1, in which the monodisperse particles are hydrophobic.

9. A composition according to claim 1, in which the medium derives from the hydrosilylation reaction, the condensation reaction or the cross-linking reaction in the presence of a peroxide of at least one compound X and at least one compound Y, at least one of the compounds X and Y being a silicone compound.

10. A composition according to claim 9, in which the compounds X and Y are silicone polymers.

11. A composition according to claim 10, the compounds X and Y carrying at least one polar group.

12. A method of making up keratinous materials comprising applying thereon a composition as defined in claim 1.

13. A kit comprising: a first composition for application onto keratinous materials;a second composition for application onto the first, said second composition comprising: a physiologically acceptable medium that is anhydrous and non-pulverulent; andmonodisperse particles suitable for forming an ordered lattice of monodisperse particles on a substrate on which the composition is applied.

14. A kit according to claim 13, in which one of the first and second compositions further comprises at least one compound X, and the other of the first and second compositions further comprises at least one compound Y, at least of said compounds being a silicone compound, and said compounds X and Y being suitable when they are put into contact with each other for reacting together in a hydrosilylation reaction, a condensation reaction, or a cross-linking reaction in the presence of a peroxide.