Patent ID: 9434822
Filing Date: 2016-09-06
CPC Classification: A61K,A61P,C08G

Claim Text:
1. A block copolymer represented by the following general formula (3): wherein R1 represents a hydrogen atom or a (C1 to C5) alkyl group, R2 represents a (C1 to C5) alkylene group, R3 represents a methylene group or an ethylene group, R4 represents a hydrogen atom or a (C1 to C4) acyl group, R5 represents a hydroxyl group, an optionally substituted aryl (C1 to C8) alkoxy group or —N(R6)-CO—NHR7, R6 and R7 may be the same or different and each represents a (C3 to C6) cyclic alkyl group or a (C1 to C5) alkyl group optionally substituted with a tertiary amino group; n represents 5 to 1000, m represents 2 to 300, x′ represents 0 to 300 and y′ represents 0 to 300, provided that the sum of x′ and y′ is 1 or and less than m; and R5 is a hydroxyl group at a ratio 0% relative to m, an optionally substituted aryl (C1 to C8) alkoxy group at a ratio of 10-80% relative to m, and —N(R6)-CO—NHR7 at a ratio of 11-30% relative to m.