Silicone polyether elastomer gels

• US 8,273,840 B2
• Filed: 03/20/2007
• Issued: 09/25/2012
• Est. Priority Date: 03/21/2006
• Status: Active Grant

• Current Assignee: Dow Silicones Corporation (Dow, Inc.)
• Original Assignee: Dow, Inc.
• Inventors: Lin, Shaow
• Primary Examiner(s): Moore, Margaret
• Application Number:
  US12/293,580
• Publication Number:
  US 20100158824A1
• Time in Patent Office: 2,016 Days
• Field of Search: 528/15, 528/31, 524/588, 524/268, 424/401
• US Class Current: 528/15
• CPC Class Codes: A61K 8/042 Gels
• CPC Class Codes: A61K 8/31 Hydrocarbons
• CPC Class Codes: A61K 8/37 Esters of carboxylic acids
• CPC Class Codes: A61K 8/585 Organosilicon compounds
• CPC Class Codes: A61K 8/671 Vitamin A; Derivatives thereof, e.g. ester of vitamin A acid, ester of retinol, retinol, retinal
• 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: C08G 77/045 containing less than 25 silicon atoms
• CPC Class Codes: C08G 77/12 containing silicon bound to hydrogen C08G77/045 takes precedence
• CPC Class Codes: C08G 77/20 containing silicon bound to unsaturated aliphatic groups C08G77/045 takes precedence
• CPC Class Codes: C08G 77/46 containing polyether sequences
• CPC Class Codes: C08G 77/50 by carbon linkages C08G77/485 takes precedence
• CPC Class Codes: C08L 83/00 Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: C08L 83/06 containing silicon bound to oxygen-containing groups C08L83/12 takes precedence
• CPC Class Codes: C08L 83/12 containing polyether sequences

Abstract

Gel compositions are disclosed containing a silicone polyether elastomer from the reaction of an organohydrogensiloxane having at least two SiH containing cyclosiloxane rings in its molecule, a compound or mixture of compounds having at least two aliphatic unsaturated groups in its molecule, and a hydrosilylation catalyst. The silicone polyether elastomer reaction product may itself be a gelled composition, or optionally may be contained in a carrier fluid to form a gel. The gel compositions may further contain a personal or healthcare active.

Claims

1. A gel composition comprising a silicone polyether elastomer from the reaction of:

A) an organohydrogensiloxane prepared by a hydrosilylation reaction of;

a) an organohydrogencyclosiloxane having the formula [(CH₃)HSiO]_g where g is 3-8 and,

B) a compound or mixture of compounds having at least two aliphatic unsaturated hydrocarbon groups in its molecule selected from a vinyl functional or hexenyl functional polydimethylsiloxane having the average formula,

CH₂═

CH(Me)₂SiO[Me₂SiO]_xSi(Me)₂CH═

CH₂

CH₂═

CH—

(CH₂)₄(Me)₂SiO[Me₂SiO]_xSi(Me)₂-(CH₂)₄—

CH═

CH₂, or

Me₃SiO[(Me)₂SiO]_x[CH₂═

CH(Me)SiO]_ySiMe₃,

 

wherein Me is methyl, x≧

0 and y≧

2, and wherein the molar ratio of SiH units to unsaturated group ranges from 2/1 to 8/1,

B³) a polyether compound or mixture of polyether compounds having the formula R²—

Y—

R² where R² is a monovalent unsaturated aliphatic group and Y is a polyoxyalkylene group having the formula —

[(C₂H₄O)_c(C₃H₆O)_d(C₄H₈O)_e]—

where c, d, and e may each independently range from 0 to 200, providing the sum of c+d+e is greater than 2

C) a hydrosilylation catalyst, and

D) a carrier fluid selected from decamethylcyclopentasiloxane, isododecane, or isodecyl neopentanoate,

wherein the gel composition has a compression hardness of at least 200 Newton/m².

2. The composition of claim 1 further comprising

E) a personal care or healthcare active.

3. The composition of claim 1 wherein B³) the polyether compound is selected from the group

H₂C═

CHCH₂[C₃H₆O]_dCH₂CH═

CH₂

H₂C═

CH[C₃H₆O]_dCH═

CH₂

H₂C═

C(CH₃)CH₂[C₃H₆O]_dCH₂C(CH₃)═

CH₂

HC≡

CCH₂[C₃H₆O]_dCH₂C≡

CH, and

HC≡

CC(CH₃)₂[C₃H₆O]_dC(CH₃)₂C≡

CH

where d is greater than 2.

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

5. The composition of claim 2 wherein E) is a personal care active selected from a vitamin, sunscreen, plant extract, or fragrance.

6. The composition of claim 2 wherein E) is a health care active selected from a topical drug active, protein, enzyme, antifungal, or antimicrobial agent.

7. The composition of claim 2 wherein component E) is vitamin A palmitate.

8. The composition of claim 2 wherein component E) is octyl methoxycinnamate.