Organopolysiloxane gels for use in cosmetics
First Claim
1. A stable organopolysiloxane gel which is capable of forming a stable emulsion with a hydrophilic liquid, said gel prepared by reacting a composition comprising:
- a) an organopolysiloxane resin bearing hydrosilylatable unsaturated groups;
b) an Si—
H functional organopolysiloxane crosslinker containing at least some non-terminal Si—
H bound hydrogen and in excess of 5 Si—
H bound hydrogens per molecule on average;
c) an effective compatabilizing amount of hydrosilylatable unsaturated hydrophile;
in the presence of a hydrosilylation catalyst to form a gel, at least a portion of said reacting prior to gelation taking place in the presence of an oleaginous composition containing minimally 50 weight percent based on the total weight of the oleaginous composition, of a low viscosity polyorganosiloxane.
3 Assignments
0 Petitions
Accused Products
Abstract
Organopolysiloxane gels containing gel-bound hydrophillic groups are prepared by reacting a hydrosilylatable unsaturated organopolysiloxane resin, a crosslinker bearing Si—H bound hydrogen, and a hydrosilylatable unsaturated hydrophile, in the presence of an effective amount of a hydrosilylation catalyst, at least a portion of the reaction taking place in the presence of at least 60 weight percent of an oleaginous composition containing at least 50 weight percent low viscosity organopolysiloxane. When sheared, the crosslinked organosiloxane compositions form a stable, preferably incompatible gel which may be used in turn to form a stable emulsion with large amounts of ordinarily incompatible hydrophillic liquids. The emulsions thus formed are suitable for use in a wide variety of cosmetic products.
354 Citations
26 Claims
-
1. A stable organopolysiloxane gel which is capable of forming a stable emulsion with a hydrophilic liquid, said gel prepared by reacting a composition comprising:
-
a) an organopolysiloxane resin bearing hydrosilylatable unsaturated groups;
b) an Si—
H functional organopolysiloxane crosslinker containing at least some non-terminal Si—
H bound hydrogen and in excess of 5 Si—
H bound hydrogens per molecule on average;
c) an effective compatabilizing amount of hydrosilylatable unsaturated hydrophile;
in the presence of a hydrosilylation catalyst to form a gel, at least a portion of said reacting prior to gelation taking place in the presence of an oleaginous composition containing minimally 50 weight percent based on the total weight of the oleaginous composition, of a low viscosity polyorganosiloxane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
-
5. The gel in accordance with claim 1 wherein said organopolysiloxane resin is an MQ resin, said gel prepared by reacting a composition comprising
a) 10-30% of unsaturated MQ resin; -
b) 1-5% of Si—
H functional crosslinker; and
c) 0.1-5% of said unsaturated hydrophile;
in the presence of d) 88% to 60% of oleaginous composition, all percents being % by weight relative to total weight.
-
-
6. The gel of claim 5, wherein said MQ resin has a vinyl unsaturation content of 1.0 to 2.0% by weight and is present in an amount of 15% to 20% by weight;
- said Si—
H crosslinker is a polyorganosiloxane comprising dimethylsiloxy and hydrogenmethylsiloxy repeating units with an Si—
H bound hydrogen content of 0.1 to 1.0 weight percent, said crosslinker present in an amount of from 1 to 3 weight percent by weight; and
wherein said hydrophile is an oxyethylated allyl alcohol present in an amount of 0.1 to 2 weight percent;
said oleaginous substance comprises minimally 80% by weight low viscosity organopolysiloxanes; and
said oleaginous substance is present in an amount of 50% to about 84% based on the weight of the gel.
- said Si—
-
7. The gel of claim 1, wherein prior to, during, and/or following said reacting, an inhibitor which inhibits hydrosilylation is present.
-
8. The gel of claim 7, wherein the inhibitor is a sulfur-containing compound.
-
9. The gel of claim 1, further comprising a filler.
-
10. A process for the preparation of the organopolysiloxane gel of claim 1, said process comprising mixing together an unsaturated MQ resin, said Si—
- H functional organopolysiloxane crosslinker, said unsaturated hydrophile, and said hydrosilylation catalyst;
crosslinking the mixture obtained until the mixture gels to a crosslinked gel at least a portion of said crosslinking occurring in the presence of said oleaginous substance prior to gelation; and
subjecting the crosslinked gel thereby obtained to high shear mixing to form a stable creamy gel.
- H functional organopolysiloxane crosslinker, said unsaturated hydrophile, and said hydrosilylation catalyst;
-
11. The process of claim 10, where the reaction takes place at a temperature less than 100°
- C., and following gelation, the temperature is maintained at higher than 50°
C. for a period of at least one half hour.
- C., and following gelation, the temperature is maintained at higher than 50°
-
12. The process of claim 10, wherein following gelation, an inhibitor of hydrosilylation is added.
-
13. A smooth, stable emulsion containing both a silicone gel and an incompatible hydrophilic liquid, comprising:
-
a) as a silicone gel component, the organopolysiloxane gel of claim 1;
b) an incompatible hydrophilic liquid which forms a stable emulsion with said silicone gel a).
-
-
14. A smooth, stable emulsion containing both a silicone gel and an incompatible hydrophilic liquid, comprising:
-
a) as a silicone gel component, the organopolysiloxane gel of claim 2;
b) an incompatible hydrophilic liquid which forms a stable emulsion with said silicone gel a).
-
-
15. A smooth, stable emulsion containing both a silicone gel and an incompatible hydrophilic liquid, comprising:
-
a) as a silicone gel component, the organopolysiloxane gel of claim 3;
b) an incompatible hydrophilic liquid which forms a stable emulsion with said silicone gel a).
-
-
16. A smooth, stable emulsion containing both a silicone gel and an incompatible hydrophilic liquid, comprising:
-
a) as a silicone gel component, the organopolysiloxane gel of claim 4;
b) an incompatible hydrophilic liquid which forms a stable emulsion with said silicone gel a).
-
-
17. A smooth, stable emulsion containing both a silicone gel and an incompatible hydrophilic liquid, comprising:
-
a) as a silicone gel component, the organopolysiloxane gel of claim 5;
b) an incompatible hydrophilic liquid which forms a stable emulsion with said silicone gel a).
-
-
18. A smooth, stable emulsion containing both a silicone gel and an incompatible hydrophilic liquid, comprising:
-
a) as a silicone gel component, the organopolysiloxane gel of claim 6;
b) an incompatible hydrophilic liquid which forms a stable emulsion with said silicone gel a).
-
-
19. A smooth, stable emulsion containing both a silicone gel and an incompatible hydrophilic liquid, comprising:
-
a ) as a silicone gel component, the organopolysiloxane gel of claim 7;
b) an incompatible hydrophilic liquid which forms a stable emulsion with said silicone gel a).
-
-
20. The emulsion of claim 13, wherein said hydrophilic liquid is selected from the group consisting of C1-4 lower alkanols, C2-4 glycols, glycerine, water, and mixtures thereof.
-
21. The emulsion of claim 18, wherein said hydrophilic liquid is water ethylene glycol, diethylene glycol, propylene glycol, glycerine or mixtures thereof, said hydrophilic liquid present in an amount of from 5% to about 50% based on the weight of the emulsion.
-
22. A cosmetic product comprising the emulsion of claim 13, and one or more cosmetically acceptable ingredients.
-
23. The cosmetic product of claim 22 which is not itself an emulsion.
-
24. The cosmetic product of claim 22, wherein said cosmetic product is selected from the group consisting of antiperspirants, deodorants, sun care preparations, after sun care preparations, moisturizers, creams, lotions, facial powder, eye powder, eye shadow, liquid foundation, liquid-to-powder foundation, lipsticks, hair conditioners, and volume enhancers.
-
-
25. A stable organopolysiloxane gel which is capable of forming a stable emulsion with a hydrophilic liquid, said gel prepared by reacting a composition comprising:
-
a) an organopolysiloxane resin bearing hydrosilylatable unsaturated groups;
b) an Si—
H functional organopolysiloxane crosslinker containing at least some non-terminal Si—
H bound hydrogen;
c) an effective compatabilizing amount of hydrosilylatable, mono-unsaturated hydrophile;
in the presence of a hydrosilylation catalyst to form a gel, at least a portion of said reacting prior to gelation taking place in the presence of an oleaginous composition containing minimally 50 weight percent based on the total weight of the oleaginous composition, of a low viscosity polyorganosiloxane.
-
-
26. A stable organopolysiloxane gel which is capable of forming a stable emulsion with a hydrophilic liquid, said gel prepared by reacting a composition comprising:
-
a) an organopolysiloxane resin bearing hydrosilylatable unsaturated groups;
b) an Si—
H functional organopolysiloxane crosslinker containing at least some non-terminal Si—
H bound hydrogen;
c) an effective compatabilizing amount of hydrosilylatable unsaturated hydrophile;
in the presence of a hydrosilylation catalyst to form a gel, said reacting taking place in the presence of 75 to 85 weight percent of a low viscosity polyorganosiloxane.
-
Specification