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US 8,273,840 B2Granted
Silicone polyether elastomer gels
AssigneeDow Corning Corporation
InventorShaow Lin
Life of this patent
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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.
Claims8
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.
8 more elements
Dependencies are inferred from the claim text.