Silicone polyether-amide block copolymers
View Patent ↗Silicone block copolymers containing polyether-amide units, processes to prepare such silicone block copolymers, and their use in various personal care, cosmetic, household care, and healthcare formulations are disclosed.
1. A process for making a silicone block copolymer comprising;
I) reacting an omega-olefinic carboxylic acid selected from the group consisting of undecylenic acid, acrylic acid, 3-butenoic acid, and pentenoic acid with poly(oxyethylene)diamine or poly(oxypropylene)diamine or mixtures thereof to form a diamide,
II) reacting the diamide and an alpha-omega olefin with an SiH containing siloxane having the average structure
wherein DP is an integer having a value of 1-500 to form the silicone block copolymer.
2. The process of claim 1 wherein the diamide, the alpha-omega olefin, and the SiH containing siloxane are reacted via a platinum catalyzed hydrosilylation.
3. The process of claim 1 wherein the alpha-omega olefin has the formula H 2 C═CH-A-CH═CH 2 , where A is a divalent organic group or organopolysiloxane.
4. The process of claim 3 wherein A is a divalent organic group selected from linear or branched C 1 -C 30 alkylene chains.
5. The process of claim 4 wherein the alpha-omega olefin is 1,5 hexadiene.
6. A silicone block copolymer prepared by the process of claim 1 .
7. A personal, household, or healthcare composition comprising the silicone block copolymer of claim 6 .
8. The personal care composition of claim 7 wherein the personal care composition is in the form of a stick, gel, or lotion.
9. A gel comprising the composition of claim 6 and an oil.
10. The gel of claim 9 wherein the oil is an organic or silicone oil.
11. An emulsion comprising the composition of claim 6 .