Patent ID: 7408018

Claim:
A polymer of formula (VII): wherein m is about 0.1 to about 0.9; p is about 0.9 to about 0.1; n is about 50 to about 150; each R 1 is independently (CH 2 ) 4 , (CH 2 ) 8 , or (CH 2 ) 12 ; each R 2 is independently hydrogen, or (C 6 -C 10 )aryl(C 1 -C 6 )alkyl; each R 3 is independently hydrogen, (C 1 -C 6 )alkyl, (C 2 -C 6 )alkenyl, or (C 6 -C 10 )aryl(C 1 -C 6 )alkyl; and each R 4 is independently (CH 2 ) 4 , (CH 2 ) 6 , (CH 2 ) 8 , or (CH 2 ) 12 .