Personal Care Compositions Containing Silicone Elastomer Gels

• US 20090317343A1
• Filed: 12/19/2007
• Published: 12/24/2009
• Est. Priority Date: 12/29/2006
• Status: Abandoned Application

• Current Assignee: Dow, Inc.
• Original Assignee: Dow, Inc.
• Inventors: Van Reeth, Isabella, Lin, Shaow
• Application Number:
  US12/520,579
• Publication Number:
  US 20090317343A1
• Time in Patent Office: Days
• US Class Current: 514/1.100
• CPC Class Codes: A61K 2800/48 Thickener, Thickening system
• CPC Class Codes: A61K 8/891 saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
• CPC Class Codes: A61Q 1/02 Preparations containing skin colorants, e.g. pigments preparations in powder form A61Q1/12
• CPC Class Codes: A61Q 1/06 Lipsticks
• 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 19/10 Washing or bathing preparations

Abstract

Personal care compositions are disclosed containing a silicone elastomer from the reaction of an organohydrogen-siloxane having at least two SiH containing cyclosiloxane rings in its molecule, a compound having at least two aliphatic unsaturated groups in its molecule, and a hydrosilylation catalyst.

Claims

1. A personal care composition comprising a silicone elastomer gel containing a silicone elastomer derived from;

A) an organohydrogensiloxane having at least two SiH containing cyclosiloxane rings in its molecule

B) a compound having at least two aliphatic unsaturated groups in its molecule,

C) a hydrosilylation catalyst,

D) an optional carrier fluid;

E) an optional personal care or healthcare active.

2. The composition of claim 1 wherein the silicone gel composition has a hardness of at least 0.03 Newton force.

3. The composition of claim 1 wherein the organohydrogensiloxane has the formula G-[Y-G]_a where G is a cyclosiloxane containing at least one SiH unit and Y is a divalent organic group, a siloxane group, a polyoxyalkylene group, polyalkylene, a hydrocarbon-silicone copolymer, or combination thereof, and a is greater than zero.

4. The composition of claim 1 wherein the organohydrogensiloxane is prepared by a hydrosilylation reaction of

a) an organohydrogencyclosiloxane having at least two SiH units on the siloxane ring and,

B) a compound containing at least two aliphatic unsaturated groups in its molecule, wherein the molar ratio of SiH units to unsaturated group ranges from 2/1 to 8/1.

5. The composition of claim 4 wherein the organohydrogencyclosiloxane has the formula

[(CH₃)HSiO]_m where m is 3-8.

6. The composition of claim 1 wherein B) the compound containing at least two aliphatic unsaturated groups in its molecule is selected from a compound having the formula R²—

Y—

R² where R² is a monovalent unsaturated aliphatic group and Y is a divalent hydrocarbon, a siloxane, a polyoxyalkylene, a polyalkylene or polyisoalkylene, a hydrocarbon-silicone copolymer, or mixtures thereof.

7. The composition of claim 1 wherein the compound containing at least two aliphatic unsaturated groups in its molecule is 1,5-hexadiene.

8. The composition of claim 1 wherein the compound containing at least two aliphatic unsaturated groups is selected from an organopolysiloxane comprising at least two siloxane units having a formula R² R_mSiO₍₄₋

m)/2

wherein

R is an organic group,

R² is a monovalent unsaturated aliphatic group, and

m is zero to 3.

9. The composition of claim 8 wherein the organopolysiloxane has the formula

(R₂R²SiO_0.5)(SiO₂)_w(R₂R²SiO_0.5)

(R₂R²SiO_0.5)(SiO₂)_w(R₂SiO)_x(R₂R²SiO_0.5)

(R₂R²SiO_0.5)(R₂SiO)_x(R₂R²SiO_0.5)

(R₃SiO_0.5)(R₂SiO)_x(R²RSiO)_y(R₃SiO_0.5)

(R₃SiO_0.5)(R₂SiO)_x(R²RSiO)_y(RSiO_1.5)_z(R₃SiO_0.5)

(R₃SiO_0.5)(R₂SiO)_x(R²RSiO)_y(SiO₂)_w(R₃SiO_0.5)

where w≧

0, x≧

0, y≧

2, and z is ≧

0,

and R is an organic group, R² is a monovalent unsaturated aliphatic group.

10. The composition of claim 9 wherein R is methyl and R² is CH2═

CH—

.

11. The composition of claim 6 wherein Y in the R²—

Y—

R² compound is a hydrocarbon-silicone copolymer group having the formula

—

[R¹_u(R₂SiO)_v]_m—

where R¹ is a divalent hydrocarbon, R is an organic group,

u and v are independently ≧

1, and m is >

1.

12. The composition of claim 11 wherein

R is methyl,

R¹ is hexylene,

u=1, v and m is >

1.

13. The composition of claim 12 wherein v ranges from 2 to 500.

14. The composition of claim 12 where m ranges from 2 to 100.

15. The composition of claim 1 wherein C) the hydrosilylation catalyst is a platinum group containing catalyst.

16. The composition of claim 1 wherein the molar ratio of A)/B) is from 10/1 to 1/10.

17. The composition of claim 1 wherein the carrier fluid is a silicone having a viscosity at 25°

C. in the range of 1 to 1,000 mm²/sec.

18. The composition of claim 1 wherein the carrier fluid is decamethylcyclopentasiloxane, isododecane, or isodecyl neopentanoate.

19. The composition of claim 1 wherein E) is a personal care active selected from a vitamin, sunscreen, plant extract, or fragrance.

20. The composition of claim 1 wherein E) is a health care active selected from a topical drug active, protein, enzyme, antifugual, or antimicrobial agent.

21. The composition of claim 1 wherein component E) is vitamin A palmitate.

22. The composition of claim 1 wherein component E) is octyl methoxycinnamate.

23. The composition of claim 1 wherein the personal care composition is selected from a color cosmetic, a lipstick, a foundation, a shampoo, a hair conditioner, a hair fixative, a shower gel, a skin moisturizer, a skin conditioner, a body conditioner, a sun protection product, an antiperspirant, and a deodorant.