Patent ID: 8466219

Claim:
A copolymer consisting of the following structural units: 0 to 20 mol % of structural unit A 0 to 20 mol % of structural unit B 1 to 79 mol % of structural unit C 1 to 79 mol % of structural unit D and 20 to 80 mol % of structural unit E wherein R 1 and R 2 are each independently hydrogen, methyl or methylene, a, b are each zero or one and a+b is one, R 3 is, C 8 -C 30 -alkenyl, benzyl or N-propylene imidazole, X and Y are each independently —OH, —O—C 1 -C 30 -alkyl, NR 4 R 5 or —O − N + H 2 R 4 R 5 , R 4 and R 5 are each independently hydrogen, R 3 or R, R is Z is C 2 -C 4 -alkylene, n is a number between 1 and 1000, R 6 is hydrogen, C 1 -C 30 -alkyl, C 5 -C 12 -cycloalkyl or C 6 -C 30 -aryl, R 7 is hydrogen or C 1 -C 4 -alkyl, R 8 is hydrogen or C 1 -C 4 -alkyl, and R 9 is C 1 -C 60 -alkyl or C 6 -C 10 -aryl.