Leave-on compositions for personal care
View Patent ↗The present invention relates to leave-on compositions for personal care comprising trimethylsilylalkylsilsesquioxanes, particularly trimethylsilyl-n-octylsilsesquioxanes (Caprylyl Trimethicones). Said trimethylsilylalkylsilsesquioxanes are especially useful in formulating emulsions.
1. Leave-on composition for personal care comprising from 0.1 to 60% by weight of at least one trimethylsilylalkyl-silsesquioxane of formula (1)
Me 3 SiO—[Si(R)(Me 3 SiO)O] x —SiMe 3 (1)
wherein Me is methyl, and R is a straight or branched alkyl group having from 6 to 18 carbon atoms and x is a number from 1 to 10, wherein the leave-on composition is an emulsion.
2. Leave-on composition according to claim 1 , wherein R in formula (1) is an alkyl group having from 6 to 14 carbon atoms.
3. Leave-on composition according to claim 2 , wherein R in formula (1) is a n-octyl group.
4. Leave-on composition according to claim 1 , wherein x in formula (1) is a number from 1 to 4.
5. Leave-on composition according to claim 4 , wherein x in formula (1) is equal 1.
6. Leave-on composition according to claim 1 , wherein the trimethylsilylalkylsilsesquioxanes of formula (1) are substantially free of alkoxysilanes, chlorosilanes, silanol functionalities and organic and/or inorganic compounds.
7. Leave-on composition according to claim 6 , wherein the trimethylsilylalkylsilsesquioxanes of formula (1) contain less than 3% by weight of alkoxysilanes, chlorosilanes, silanol functionalities and organic and/or inorganic compounds.
8. Leave-on compositions according to claim 1 , wherein they comprise from 0.5% to 10% by weight of trimethylsilylalkyl-silsesquioxanes of formula (1).
9. Leave-on composition according to claim 1 which is a topical skin care or a hair care product.
10. Leave-on composition according to claim 1 , which is an oil-in-water emulsion.
11. Leave-on composition according to claim 1 which is a microemulsion.
12. Leave-on composition according to claim 1 which is a triple emulsion.
13. Process for increasing the gloss and sheen of hair, wherein said process comprises applying an effective amount of a leave-on composition comprising from 0.1 to 60% by weight of at least one trimethylsilylalkylsilsesquioxane of formula (1)
Me 3 SiO—[Si(R)(Me 3 SiO)O] x —SiMe 3 (1)
wherein Me is methyl, and R is a straight or branched alkyl group having from 6 to 18 carbon atoms and x is a number from 1 to 10, to said hair wherein the leave-on composition is an emulsion.
14. Process for increasing the emolliency of the skin, wherein said process comprises applying an effective amount of a leave-on composition comprising from 0.1 to 60% by weight of at least one trimethylsilylalkylsilsesquioxane of formula (1)
Me 3 SiO—[Si(R)(Me 3 SiO)O] x —SiMe 3 (1),
wherein Me is methyl, and R is a straight or branched alkyl group having from 6 to 18 carbon atoms and x is a number from 1 to 10, to said skin, wherein the leave-on composition is an emulsion.
15. Process for increasing the water repellency of the skin, wherein said process comprises applying an effective amount of a leave-on composition comprising from 0.1 to 60% by weight of at least one trimethylsilylalkylsilsesquioxane of formula (1)
Me 3 SiO—[Si(R)(Me 3 SiO)O] x —SiMe 3 (1),
wherein Me is methyl, and R is a straight or branched alkyl group having from 6 to 18 carbon atoms and x is a number from 1 to 10, to said skin, wherein the leave-on composition is an emulsion.
16. Leave-on composition according to claim 6 , wherein the trimethylsilylalkylsilsesquioxanes of formula (1) contain less than 1% by weight of alkoxysilanes, chlorosilanes, silanol functionalities and organic and or inorganic compounds.
17. Leave-on compositions according to claim 1 , comprising from 1% to 5% by weight of trimethylsilylalkyl-silsesquioxanes of formula (1).