Multiple emulsion compositions

• US 20080139453A1
• Filed: 12/12/2007
• Published: 06/12/2008
• Est. Priority Date: 12/12/2006
• Status: Abandoned Application

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Tanaka, Hidekazu, Yoshimi, Naohisa
• Application Number:
  US12/001,526
• Publication Number:
  US 20080139453A1
• Time in Patent Office: Days
• US Class Current: 514/2
• CPC Class Codes: A61K 8/066 Multiple emulsions, e.g. water-in-oil-in-water
• CPC Class Codes: A61K 8/60 Sugars; Derivatives thereof
• CPC Class Codes: A61K 8/64 Proteins; Peptides; Derivatives or degradation products thereof
• CPC Class Codes: A61K 8/673 Vitamin B group
• CPC Class Codes: A61K 8/73 Polysaccharides
• CPC Class Codes: A61K 8/732 Starch; Amylose; Amylopectin; Derivatives thereof
• 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: A61P 17/00 Drugs for dermatological disorders
• CPC Class Codes: A61Q 17/04 Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations
• CPC Class Codes: A61Q 19/00 Preparations for care of the skin
• CPC Class Codes: A61Q 19/02 for chemically bleaching or whitening the skin
• CPC Class Codes: C08J 2383/04 Polysiloxanes
• CPC Class Codes: C08J 3/03 in aqueous media
• CPC Class Codes: C08L 2666/26 Natural polymers, natural resins or derivatives thereof according to C08L1/00 - C08L5/00, C08L89/00, C08L93/00, C08L97/00 or C08L99/00
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: C08L 83/12 containing polyether sequences
• CPC Class Codes: C09K 23/00 Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
• CPC Class Codes: C09K 23/54 Silicon compounds
• CPC Class Codes: C09K 23/56 Glucosides; Mucilage; Saponins

Abstract

The present invention relates to an O/W/O emulsion comprising; a) an external oil phase which comprises an emulsifying crosslinked siloxane elastomer and a solvent for the emulsifying crosslinked siloxane elastomer; and b) an O/W type primary emulsion which comprises an internal oil phase dispersed in an aqueous phase dispersed in the external oil phase wherein the aqueous phase comprises from about 0.01% to about 10% of a hydrophobically modified polymeric emulsifier, wherein when shear stress is applied to the O/W/O emulsion during spreading on skin, at least a portion of the primary emulsion is released from the O/W/O emulsion. The present invention also relates to an O/W/O emulsion composition comprising: a) from about 0.1% to about 15% of an emulsifying crosslinked siloxane elastomer; b) from about 0.01% to about 10% of a hydrophobically modified polymeric emulsifier; c) from about 1% to about 40% of a solvent for the emulsifying crosslinked siloxane elastomer; and d) water, wherein when shear stress is applied to the composition during spreading on skin, phase separation is occurred.

Claims

1. An O/W/O emulsion composition comprising:

a) from about 0.1% to about 15% of an emulsifying crosslinked siloxane elastomer;

b) from about 0.01% to about 10% of a hydrophobically modified polymeric emulsifier;

c) from about 1% to about 40% of a solvent for the emulsifying crosslinked siloxane elastomer; and

d) water,

wherein when shear stress is applied to the composition during spreading on skin, phase separation occurs.

2. The O/W/O emulsion composition according to claim 1, further comprising from about 0.1% to about 15% of a non-emulsifying crosslinked siloxane elastomer.

3. The O/W/O emulsion composition according to claim 1, wherein said hydrophobically modified polymeric emulsifier is a hydrophobically modified polysaccharide emulsifier.

4. The O/W/O emulsion composition according to claim 3, wherein said hydrophobically modified polysaccharide emulsifier is selected from the group consisting of a fructan-based emulsifier and a starch-based emulsifier.

5. The O/W/O emulsion composition according to claim 1, further comprising at least one compound selected from a group consisting skin care actives, skin conditioning agents, oil-soluble compounds, sunscreen agents and mixtures thereof.

6. The O/W/O emulsion composition according to claim 5, wherein said skin care actives are selected from the group consisting of vitamin B₃ compounds, whitening actives, peptides, sugar amines and mixtures thereof.

7. An O/W/O emulsion composition comprising:

a) from about 0.1% to about 15% of an emulsifying crosslinked siloxane elastomer;

b) from about 0.01% to about 10% of a hydrophobically modified polymeric emulsifier;

c) from about 1% to about 40% of a solvent for the emulsifying crosslinked siloxane elastomer; and

d) water,

wherein when higher than about 1,000 sec<sup>−

1</sup> of a shear rate is applied to the composition, phase separation occurs.

8. An O/W/O emulsion comprising;

a) an external oil phase which comprises an emulsifying crosslinked siloxane elastomer and a solvent for the emulsifying crosslinked siloxane elastomer; and

b) an O/W type primary emulsion which comprises an internal oil phase dispersed in an aqueous phase dispersed in the external oil phase, wherein the aqueous phase comprises from about 0.01% to about 10% of a hydrophobically modified polymeric emulsifier,

wherein when shear stress is applied to the O/W/O emulsion during spreading on skin, at least a portion of the primary emulsion is released from the O/W/O emulsion.

9. The O/W/O emulsion according to claim 8, wherein said internal oil phase comprises a compound incompatible with the solvent for the emulsifying crosslinked siloxane elastomer.

10. The O/W/O emulsion according to claim 8, wherein said hydrophobically modified polymeric emulsifier is selected from the group consisting of a fructan-based emulsifier and a starch-based emulsifier.

11. The O/W/O emulsion according to claim 8, further comprising from about 0.1% to about 15% of a non-emulsifying crosslinked siloxane elastomer.

12. The O/W/O emulsion according to claim 8, further comprising at least one compound selected from a group consisting skin care actives, skin conditioning agents, oil-soluble compounds, sunscreen agents and mixtures thereof.

13. The O/W/O emulsion according to claim 12, wherein said skin care actives are selected from the group consisting of vitamin B₃ compounds, whitening actives, peptides, sugar amines and mixtures thereof.

14. The O/W/O emulsion according to claim 8, wherein said external oil phase comprises from about 0.1% to about 15% of an emulsifying crosslinked siloxane elastomer.

15. An O/W/O emulsion comprising;

a) an external oil phase which comprises an emulsifying crosslinked siloxane elastomer and a solvent for the emulsifying crosslinked siloxane elastomer; and

b) an O/W type primary emulsion which comprises an internal oil phase dispersed in an aqueous phase dispersed in the external oil phase, wherein the aqueous phase comprises from about 0.01% to about 10% of a hydrophobically modified polymeric emulsifier,

wherein when higher than about 10,000 shear rate/sec of shear stress is applied to the O/W/O emulsion, at least a portion of the primary emulsion is released from the O/W/O emulsion.

16. A method of preparing an O/W/O emulsion comprising:

a) preparing an O/W type primary emulsion which comprises from about 0.01% to about 10% of a hydrophobically modified polymeric emulsifier; and

b) dispersing the O/W type primary emulsion in a continuous external oil phase which comprises an emulsifying crosslinked siloxane elastomer and a solvent for the emulsifying crosslinked siloxane elastomer,

wherein when higher than about 1,000 sec<sup>−

1</sup> of a shear rate is applied to the composition, at least a portion of the primary emulsion is released from the O/W/O emulsion.