Silicone polyether elastomer gels
First Claim
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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 2C) a hydrosilylation catalyst, andD) a carrier fluid selected from decamethylcyclopentasiloxane, isododecane, or isodecyl neopentanoate,wherein the gel composition has a compression hardness of at least 200 Newton/m2.
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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.
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Citations
8 Claims
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1. A gel composition comprising a silicone polyether elastomer from the reaction of:
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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 2C) 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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≡
CHwhere d is greater than 2.
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4. The composition of claim 1 wherein C) the hydrosilylation catalyst is a platinum group containing catalyst.
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5. The composition of claim 2 wherein E) is a personal care active selected from a vitamin, sunscreen, plant extract, or fragrance.
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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.
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7. The composition of claim 2 wherein component E) is vitamin A palmitate.
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8. The composition of claim 2 wherein component E) is octyl methoxycinnamate.
Specification