Stable O/W/O emulsion and its use as a cosmetic and/or dermatological composition

• US 6,346,256 B1
• Filed: 08/27/1999
• Issued: 02/12/2002
• Est. Priority Date: 09/09/1998
• Status: Expired due to Fees

• Current Assignee: L'Oreal SA
• Original Assignee: L'Oreal SA
• Inventors: Simon, Pascal
• Primary Examiner(s): Dudash, Diana
• Assistant Examiner(s): Berman, Alysia
• Application Number:
  US09/384,430
• Time in Patent Office: 900 Days
• Field of Search: 424/401, 424/70.12, 424/70.19, 424/70.31, 574/844, 574/846, 574/847, 574/938, 574/944, 574/945
• US Class Current: 424/401
• CPC Class Codes: A61K 8/066 Multiple emulsions, e.g. water-in-oil-in-water
• CPC Class Codes: A61K 8/894 modified by a polyoxyalkylene group, e.g. cetyl dimethicone copolyol
• CPC Class Codes: A61Q 19/007 Preparations for dry skin
• CPC Class Codes: C09K 23/54 Silicon compounds

Abstract

An oil/water/oil triple emulsion is stabilized with at least one partially or completely crosslinked organopolysiloxane elastomer having at least one polyoxyethylenated and/or polyoxypropylenated chain. The stable triple emulsion can be used as a composition for topical application, in particular as a cosmetic or dermatological composition, and especially as a vehicle for active principles. The emulsion is particularly useful for cleansing and/or treating and/or protecting the skin and/or mucous membranes and/or keratinous fibers.

Claims

1. An oil/water/oil triple emulsion comprising

oil, water, and

at least one partially or completely crosslinked organopolysiloxane elastomer,

wherein said organopolysiloxane elastomer contains at least one substituent chain selected from the group consisting of polyoxyethylene, polyoxypropylene, copolymers of polyoxyethylene and polyoxypropylene, and mixtures thereof.

2. The emulsion of claim 1, wherein said organopolysiloxane elastomer is obtained by addition polymerization of the following compounds (I) and (II):

(I) an organohydropolysiloxane of formula (1);

3. The emulsion of claim 1, wherein said organopolysiloxane elastomer is mixed with a silicone oil and/or a polyol.

4. The emulsion of claim 1, wherein said organopolysiloxane elastomer is present in an amount ranging from 0.1 to 10% by weight with respect to the total weight of the triple emulsion.

5. The emulsion of claim 1, further comprising one or more emulsifiers selected from the group consisting of nonionic surfactants having an HLB of greater than or equal to 11, polymers capable of stabilizing an oil-in-water emulsion, dispersions of lipid vesicles, and mixtures thereof.

6. The emulsion of claim 5, wherein said nonionic surfactant comprises surfactants selected from the group consisting of oxyethylenated esters of fatty acids, oxyethylenated esters of glycerol, oxyethylenated esters of sorbitan, esters of sugars, and mixtures thereof.

7. The emulsion of claim 5, wherein said dispersion of lipid vesicles is a dispersion of liposomes.

8. The emulsion of claim 1, further comprising at least one active principle selected from the group consisting of vitamins, ceramides, non-saponifiable materials, algal extracts, unsaturated oils, polyols, enzymes, natural extracts, procyanidol oligomers, urea, depigmenting agents, beta-hydroxy acids, alpha-hydroxy acids, moisturizers, softeners, and mixtures thereof.

9. The emulsion of claim 8, wherein said active principle ranges from 0.01 to 20% by weight with respect to the total weight of the triple emulsion.

10. The emulsion of claim 1, further comprising at least one lipophilic or hydrophilic adjuvant selected from the group consisting of preservatives, antioxidants, sequestering agents, solvents, fragrances, fillers, sunscreen agents, odor absorbers, coloring materials, gelling agents and lipid vesicles, and mixtures thereof.

11. A method of treating human skin, mucous membranes, or keratinous fibers comprising applying the emulsion of claim 1 to said skin, mucous membranes, or keratinous fibers.

14. The emulsion of claim 3, wherein the silicone oil has a viscosity equal to or less than 100 cSt at 25°

C.

15. The emulsion of claim 5, wherein said polymer is a copolymer selected from the group consisting of copolymers containing a major fraction of a mono-olefinically unsaturated C₃-C₆ carboxylic acid monomer or a mono-olefinically unsaturated C₃-C₆ carboxylic acid anhydride monomer, and containing a minor fraction of an acrylic acid fatty ester monomer, polyacrylamides, and mixtures thereof.

16. The emulsion of claim 1, wherein said oil comprises one or more fatty substances selected from the group consisting of oils of animal origin, oils of vegetable origin, mineral oils, synthetic oils, silicone oils, fluorinated oils, waxes, silicone gums and silicone resins.

12. A method of stabilizing an oil/water/oil triple emulsion, comprising:

adding to an oil/water/oil triple emulsion at least one partially or completely crosslinked organopolysiloxane elastomer having at least one substituent chain selected from the group consisting of polyoxyethylene, polyoxypropylene, copolymers of polyoxyethylene and polyoxypropylene, and mixtures thereof.

13. The method of stabilizing an oil/water/oil triple emulsion of claim 12, wherein said organopolysiloxane elastomer is obtained by addition polymerization of the following compounds (I) and (II):

(I) an organohydropolysiloxane of formula (1);