Patent ID: 8642309

Claim:
An amphiphilic polymer comprising at least 75% of amphiphilic monomers of formula (I): in which R 1 and R 2 are independently selected from H or a C 1 -C 6 alkyl group; X and Y are independently selected from an oxygen atom, a sulphur atom, a carbonyloxy (—(CO)O—) or oxycarbonyl (—O(CO) —) group, a urethane group (—OCONH—), and an amide group of formula (—CONR 6 —) or (—NR 6 CO—), wherein R 6 is a hydrogen atom or a C 1 -C 6 alkyl; R 3 and R 4 are independently selected from: a) glycosidic groups, b) zwitterionic residues, c) poly(oxyalkylene) groups of formula —(O(CH 2 ) x ) y —OH, wherein x is comprised between 1 and 6, advantageously x is equal to 2, and y is comprised between 4 and 30, d) alkyl amide groups of formula —(CH 2 ) n CONR 7 R 8 or —(CH 2 ) n NR 7 COR 8 wherein n is comprised between 1 and 4, R 7 and R 8 are selected independently from a hydrogen atom, a C 1 -C 6 alkyl group, a glycosidic group, a zwitterionic residue or a poly(oxyalkylene) group of formula —(O(CH 2 ) x ) y —OH, wherein x and y are as defined above, R 5 is a cyclic or acyclic, saturated or unsaturated, hydrocarbon chain comprising from 5 to 16 carbon atoms, or a hemifluorocarbonated chain of formula C t F 2t+1 (CH 2 ) m with t comprised between 2 and 10 and m comprised between 2 and 10; the average molar mass by weight of the polymer being comprised between 800 and 100000.