Patent ID: 8242309

Claim:
A compound according to the following formula: wherein, A′ and A″ are independently CH 2 , CHF or CF 2 ; X′ and X″ are independently O, CF 2 , or —(CH 2 ) m —; R 5 and R 10 are the same or different organic groups, each substituted with at least two fluorine atoms; R 6 and R 9 are independently substituted or unsubstituted C 1-6 alkyl, and R 6 and R 9 may join to form a ring; R 7 and R 8 are independently substituted or unsubstituted C 1-6 alkyl, and R 7 and R 8 may join to form a ring; n is an integer from 1 to 6; and m is an integer from 1 to 20, including cosmetically acceptable salts thereof.