Patent ID: 7005420

Claim:
A copolymer comprising an N-acylated derivative of poly(2-amino-2-deoxy-D-glucose), in which between 1 and 50 percent of the free amines of said poly(2-amino-2-deoxy-D-glucose) are acylated with glutaryl and between 50 and 99 percent of the free amines of said poly(2-amino-2-deoxy-D-glucose) are acylated with a second acyl group, said second acyl group is COE 2 where E 2 is selected from the group consisting of C 1-30 alkyl, C 2-30 alkenyl, C 6-37 arylalkyl, and C 8-37 arylalkenyl, provided at least one of the free amines of said poly(2-amino-2-deoxy-D-glucose) is acylated with glutaryl.