Composition in the form of water-in-oil emulsion and its cosmetic uses

• US 6,509,024 B2
• Filed: 03/21/2001
• Issued: 01/21/2003
• Est. Priority Date: 03/21/2000
• Status: Expired due to Fees

• Current Assignee: L'Oreal SA
• Original Assignee: L'Oreal SA
• Inventors: Lorant, Raluca
• Primary Examiner(s): Moore, Margaret G.
• Application Number:
  US09/813,032
• Publication Number:
  US 20010041768A1
• Time in Patent Office: 671 Days
• Field of Search: 424/401, 424/70.12, 424/78.02, 424/78.35, 516/23, 516/27, 514/846, 514/837
• US Class Current: 424/401
• CPC Class Codes: A61K 8/06 Emulsions
• CPC Class Codes: A61K 8/064 Water-in-oil emulsions, e.g. Water-in-silicone emulsions
• CPC Class Codes: A61K 8/585 Organosilicon compounds
• CPC Class Codes: A61K 8/8158 Homopolymers or copolymers of amides or imides, e.g. (meth) acrylamide; Compositions of derivatives of such polymers
• CPC Class Codes: A61K 8/891 saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
• CPC Class Codes: A61K 8/894 modified by a polyoxyalkylene group, e.g. cetyl dimethicone copolyol
• CPC Class Codes: A61K 8/895 containing silicon bound to unsaturated aliphatic groups, e.g. vinyl dimethicone
• CPC Class Codes: A61Q 1/02 Preparations containing skin colorants, e.g. pigments preparations in powder form A61Q1/12
• CPC Class Codes: A61Q 1/14 Preparations for removing make-up
• CPC Class Codes: A61Q 19/00 Preparations for care of the skin
• CPC Class Codes: A61Q 19/007 Preparations for dry skin
• CPC Class Codes: A61Q 19/008 Preparations for oily skin
• CPC Class Codes: A61Q 5/00 Preparations for care of the hair
• CPC Class Codes: C08J 2383/04 Polysiloxanes
• CPC Class Codes: C08J 3/09 in organic liquids
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 83/12 containing polyether sequences

Abstract

The first embodiment of the present invention provides a composition, which includes:

an aqueous phase dispersed in an oily phase;

wherein the oily phase includes at least one particle of a crosslinked solid organopolysiloxane elastomer having at least one oxyalkylene group,

and wherein the aqueous phase includes at least one crosslinked and at least partially neutralized poly(2-acrylamido-2-methylpropanesulphonic acid) polymer. Other embodiments of the present invention provide methods of using the above-identified composition, compositions containing same, and a method of preparing water-in-oil emulsions.

Claims

1. A water in oil emulsion, comprising:

an aqueous phase dispersed in an oily phase;

wherein said oily phase comprises at least one particle of a crosslinked solid organopolysiloxane elastomer having at least one oxyalkylene group,

and wherein said aqueous phase comprises at least one crosslinked and at least partially neutralized poly(2-acrylamido-2-methylpropanesulphonic acid) polymer.

2. The water in oil emulsion according to claim 1, wherein said oxyalkylene group is an oxyethylene group.

3. The water in oil emulsion according to claim 1, wherein said organopolysiloxane elastomer comprises only an oxyethylene group or groups as said oxyalkylene group.

4. The water in oil emulsion according to claim 1, wherein said organopolysiloxane elastomer is obtained by an addition and crosslinking reaction in a non-aqueous medium, in the presence of a catalyst, of at least:

one first organopolysiloxane (i) having at least two vinyl groups in the α

,Ω

-position of the silicone chain per molecule; and

one second organopolysiloxane (ii) having at least one hydrogen atom bonded to a silicon atom per molecule and at least one oxyalkylene group.

5. The water in oil emulsion according to claim 4, wherein said first organopolysiloxane (i) comprises at least one polydimethylsiloxane.

6. The water in oil emulsion according to claim 4, wherein said first organopolysiloxane (i) is an α

,Ω

-dimethylvinylpolydimethylsiloxane.

7. The water in oil emulsion according to claim 4, wherein said second organopolysiloxane (ii) comprises at least one polydimethylsiloxane comprising:

one or more hydrogen atoms, each bonded to a silicon atom, and

one or more oxyalkylene groups bonded to a silicon atom via an alkylene radical having from 1 to 22 carbon atoms.

8. The water in oil emulsion according to claim 1, wherein said organopolysiloxane elastomer solid is in the form of a gel.

9. The water in oil emulsion according to claim 1, wherein said organopolysiloxane elastomer is in the form of a gel obtained according to the following stages:

(a) mixing;

at least one first organopolysiloxane (i) having at least two vinyl groups in the α

,Ω

-position of the silicone chain per molecule, with

at least one second organopolysiloxane (ii) having at least one hydrogen atom bonded to a silicon atom per molecule and at least one oxyalkylene group, to obtain a mixture;

(b) adding an oily phase to the mixture obtained in (a);

(c) polymerizing the first and second organopolysiloxanes (i) and (ii) in the oily phase added in (b) in the presence of a platinum catalyst.

10. The water in oil emulsion according to claim 1, wherein organopolysiloxane elastomer solid is in the form of a gel, and wherein said gel has a dominant elastic nature at low values of the shear stress defined as follows:

800 Pa<

G*_plate<

2,500 Pa with δ

_plate in the region of 10°

, G*_plate representing the consistency and δ

_plate representing the elasticity, this measurement being made at 1 Hz.

11. The water in oil emulsion according to claim 1, wherein said organopolysiloxane elastomer particle has a size ranging from 3 to 200 μ

m.

12. The water in oil emulsion according to claim 1, wherein said organopolysiloxane elastomer particle has a size ranging from 3 to 50 μ

m.

13. The water in oil emulsion according claim 1, wherein said organopolysiloxane elastomer is present in an amount, as active material, ranging from 0.1 to 10% by weight with respect to the total weight of the water in oil emulsion.

14. The water in oil emulsion according to claim 1, wherein said poly(2-acrylamido-2-methylpropane sulphonic acid) comprises, distributed randomly:

a) from 90 to 99.9 by weight of units of following formula (I);

in which X⁺ denotes a cation or a mixture of cations; and

b) from 0.01 to 10% by weight of crosslinking units originating from at least one crosslinking monomer having at least two olefinic double bonds;

the proportions by weight being defined with respect to the total weight of the crosslinked and neutralized poly(2-acrylamido-2-methylpropane sulphonic acid) polymer.

15. The water in oil emulsion according to claim 14, wherein in said formula (I), at most 10 mol % of said X⁺ cations in said mixture of cations are H⁺ protons.

16. The water in oil emulsion according to claim 14, wherein said poly(2-acrylamido-2-methylpropanesulphonic acid) comprises from 98 to 99.5 by weight of said units of formula (I) and from 0.2 to 2% by weight of said crosslinking units;

the proportions by weight being defined with respect to the total weight of the crosslinked and neutralized poly(2-acrylamido-2-methylpropane sulphonic acid) polymer.

17. The water in oil emulsion according to claim 14, wherein in said formula (I), X⁺ comprises NH₄⁺.

18. The water in oil emulsion according to claim 14, wherein said crosslinking monomer corresponds to the following formula (II):

in which R, denotes hydrogen or a C₁-C₄ alkyl.

19. The water in oil emulsion according to claim 1, wherein said poly(2-acrylamido-2-methylpropanesulphonic acid) is crosslinked with trimethylolpropane triacrylate.

20. The water in oil emulsion according to claim 1, wherein said poly(2-acrylamido-2-methylpropanesulphonic acid) is present in an amount ranging from 0.1 to 10% by weight of active material with respect to the total weight of the oil in water emulsion.

21. The water in oil emulsion according to claim 1, wherein said oily phase is present in an amount ranging from 5 to 50% by weight with respect to the total weight of the oil in water emulsion.

22. The water in oil emulsion according to claim 1, wherein said oily phase comprises at least one volatile silicone oil.

23. The water in oil emulsion according to claim 1, wherein said aqueous phase represents at least 65% by weight with respect to the total weight of the water in oil emulsion.

24. The water in oil emulsion according to claim 1, which does not contain any electrolyte.

25. The water in oil emulsion according to claim 1, which does not contain any active principle that is unstable in an oxidizing environment at a content of 0.01 to 20% of the total weight of the water in oil emulsion.

26. A method of using the water in oil emulsion according to claim 1, comprising applying said water in oil emulsion to at least one selected from the group consisting of hair, scalp, skin, lips, nails, mucous membranes and combinations thereof.

27. The method according to claim 26, further comprising at least one selected from the group consisting of treating, protecting, caring for, removing make-up from, or cleansing the skin, scalp, lips, hair, nails, mucous membranes and combinations thereof.

28. The method according to claim 26, further comprising making up the skin and/or lips.

29. A method of treating greasy skin, hair, lips or scalp, comprising applying the water in oil emulsion according to claim 1 to at least one selected from the group consisting of skin, hair, lips, scalp and combinations thereof.

30. A cosmetic or dermatological composition, comprising the water in oil emulsion according to claim 1 and a pharmaceutically acceptable medium.

31. The cosmetic or dermatological composition according to claim 30, which is in the form of a cream.

32. The cosmetic or dermatological composition according to claim 30, which is in the form of a greasy skin treatment composition.

33. A method for stabilizing a water-in-oil emulsion comprising an aqueous phase dispersed in an oily phase, said method comprising:

contacting said oily phase with at least one particle of a crosslinked solid organopolysiloxane elastomer having at least one oxyalkylene group; and

contacting said aqueous phase with at least one crosslinked and at least partially neutralized poly(2-acrylamido-2-methylpropanesulphonic acid) polymer,

to stabilize said water-in-oil emulsion.

34. A method of preparing a water-in-oil emulsion, comprising:

dispersing an aqueous phase in an oily phase;

wherein

said oily phase comprises at least one particle of a crosslinked solid organopolysiloxane elastomer having at least one oxyalkylene group; and

said aqueous phase comprises at least one crosslinked and partially neutralized poly(2-acrylamido-2-methylpropanesulphonic acid) polymer.