Polysaccharide and dimethicone copolyol as emulsifier for cosmetic compositions

• US 6,277,893 B1
• Filed: 05/10/1999
• Issued: 08/21/2001
• Est. Priority Date: 05/10/1999
• Status: Expired due to Term

• Current Assignee: Akzo Nobel Chemicals International B.V. (Nouryon Coöperatief UA)
• Original Assignee: National Starch and Chemical Investment Holding Corporation (Ingredion Incorporated)
• Inventors: Babenko, Tamara
• Primary Examiner(s): Warden, Jill
• Assistant Examiner(s): Cole, Monique T.
• Application Number:
  US09/307,991
• Time in Patent Office: 834 Days
• Field of Search: 516/53, 516/67, 516/71, 516/72, 516/76, 424/70.13, 424/401, 514/60, 514/844
• US Class Current: 516/67
• CPC Class Codes: A61K 8/062 Oil-in-water emulsions
• 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: 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: C09K 23/017 Mixtures of compounds

Abstract

A stable oil-in-water emulsion for use in cosmetic compositions comprising an oil phase which contains the combination of a polysaccharide such as animo-mullticarboxylate starch derivative and a dimethicone copolyol as emulsifier, and a water phase.

Claims

1. An oil-in-water emulsion comprising an oil phase which contains the combination of a polysaccharide and a dimethicone copolyol, the combination thereof acting as the sold emulsifier, and a water phase.

2. The composition of claim 1 wherein the polysaccharide is a starch, gum, cellulose or derivative thereof.

3. The composition of claim 1 wherein the oil phase comprises from about 0.1 to 95% by weight, based on the weight of emulsion, of the polysaccharide and from about 0.1 to 50% by weight, based on the weight of emulsion, of the dimethicone copolyol.

4. The composition of claim 3 wherein the polysaccharide is selected from the group consisting of an amino-multicarboxylate starch derivative, xanthan gum, hydroxyethyl cellulose and hydroxypropyl starch phosphate, the amino-multicarboxylate having one of the following structures:

wherein

ST represents a starch molecule or a modified starch molecule (wherein the hydroxy group of an anhydroglucose unit has been replaced as shown);

R is H or CH₃;

R′

is H, CH₃ or COOM

M is a cation selected from the group consisting of H, alkali metal, alkaline earth metal and ammonium;

n is 2 or 3; and

R″

is H or alkyl of 1 to 18 carbon atoms; and

the dimethicone copolyol having the following formula;

where I is 0 to 200, m is 1 to 40, n is 1 to 100, y is 4 to 40, z is 0 to 40 and the weight ratio of y;

z is from about 100;

0 to about 0;

100, and R is selected from hydrogen, alkyl, alkoxy and acyl groups having from about 1 to 16 carbon atoms.

5. The composition of claim 4 wherein the polysaccharide is the amino multicarboxylate starch derivative of formula I.

6. The composition of claim 5 wherein in the starch derivative of formula I, each R, R′

and R″

is H, M is H and n is 2.

7. The composition of claim 6 wherein the starch is potato starch.

8. The composition of claim 4 wherein the dimethicone copolyol of formula II has I of 10 to 40, m of 1 to 10, the molecular weight of the (C₂H₄O)_y—

(C₃H₆O)_z radical is from about 150 to 3000 and R is hydrogen or CH₃.

9. The composition of claim 8 wherein the polysaccharide is the amino-multicarboxylate starch derivative of formula I.

10. The composition of claim 9 wherein in the starch derivative of formula I, each R, R′

and R″

is H, M is H and n is 2.

11. The composition of claim 10 wherein the starch is potato starch.

12. A cosmetic oil-in-water emulsion composition which comprises an oil phase containing the combination of a polysaccharide and a dimethicone copolyol, the combination thereof acting as the sole emulsifier, and a water phase.

13. The composition of claim 12 wherein the polysaccharide is a starch, gum, cellulose or derivative thereof.

14. The composition of claim 12 wherein the oil phase comprises from about 0.1 to 95% by weight, based on the weight of emulsion, of the polysaccharide and from about 0.1 to 50% by weight, based on the weight of emulsion, of the dimethicone copolyol.

15. The composition of claim 14 wherein the polysaccharide is selected from the group consisting of an amino-multicarboxylate starch derivative, xanthan gum, hydroxyethyl cellulose and hydroxypropyl starch phosphate, the amino-multicarboxylate having one of the following structures:

wherein

ST represents a starch molecule or a modified starch molecule (wherein the hydroxy group of an anhydroglucose unit has been replaced as shown);

R is H or CH₃;

R′

is H, CH₃ or COOM

M is a cation selected from the group consisting of H, alkali metal, alkaline earth metal and ammonium;

n is 2 or 3; and

R″

is H or alkyl of 1 to 18 carbon atoms; and

the dimethicone copolyol having the following formula;

where I is 0 to 200, m is 1 to 40, n is 1 to 100, y is 4 to 40, z is 0 to 40 and the weight ratio of y;

z is from about 100;

0 to about 0;

100, and R is selected from hydrogen, alkyl, alkoxy and acyl groups having from about 1 to 16 carbon atoms.

16. The composition of claim 15 wherein the polysaccharide is the amino-multicarboxylate starch derivative of formula I.

17. The composition of claim 16 wherein in the starch derivative of formula I, each R, R′

and R″

is H, M is H and n is 2.

18. The composition of claim 17 wherein the starch is potato starch.

19. The composition of claim 15 wherein the dimethicone copolyol of formula II has I of 10 to 40, m of 1 to 10, the molecular weight of the (C₂H₄o)_y—

(C₃H₆O)_z radical is from about 150 to 3000 and R is hydrogen or CH₃.

20. The composition of claim 19 wherein the polysaccharide is the amino-multicarboxylate starch derivative of formula I.

21. The composition of claim 20 wherein in the starch derivative of formula I, each R, R′

and R″

is H, M is H and n is 2.

22. The composition of claim 21 wherein the starch is potato starch.