Patent ID: 7109280

Claim:
Block copolymers having formula 1: Wherein, R 1 is H, CH 3 , C 2 H 5 , C 6 H 5 , R 2 is H, CH 3 , C 2 H 5 , C 6 H 5 , X is an ester or amide link, m is in the range of 3 to 500, n is in the range of 2 to 50, L is OH, NH 2 , OCH 3 , NHCH(CH 3 ) 2 , Y is N-Acetyl Glucosamine, mannose, galactose, sialic acid, fructose, ribulose, erythrolose, xylulose, psicose, sorbose, tagatose, glucopyransoe, fructofuranose, deoxyribose, galactosamine, sucrose, lactose, isomaltose, maltose, cellobiose, cellulose and amylose.