Silicone polyether elastomer gels
View Patent ↗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.
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 [(CH 3 )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,
CH 2 ═CH(Me) 2 SiO[Me 2 SiO] x Si(Me) 2 CH═CH 2
CH 2 ═CH—(CH 2 ) 4 (Me) 2 SiO[Me 2 SiO] x Si(Me) 2 -(CH 2 ) 4 —CH═CH 2 , or
Me 3 SiO[(Me) 2 SiO] x [CH 2 ═CH(Me)SiO] y SiMe 3 ,
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,
B 3 ) a polyether compound or mixture of polyether compounds having the formula R 2 —Y—R 2 where R 2 is a monovalent unsaturated aliphatic group and Y is a polyoxyalkylene group having the formula —[(C 2 H 4 O) c (C 3 H 6 O) d (C 4 H 8 O) 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/m 2 .
2. The composition of claim 1 further comprising
E) a personal care or healthcare active.
3. The composition of claim 1 wherein B 3 ) the polyether compound is selected from the group
H 2 C═CHCH 2 [C 3 H 6 O] d CH 2 CH═CH 2
H 2 C═CH[C 3 H 6 O] d CH═CH 2
H 2 C═C(CH 3 )CH 2 [C 3 H 6 O] d CH 2 C(CH 3 )═CH 2
HC≡CCH 2 [C 3 H 6 O] d CH 2 C≡CH, and
HC≡CC(CH 3 ) 2 [C 3 H 6 O] d C(CH 3 ) 2 C≡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.