Patent ID: 7435788
Filing Date: 2008-10-14
Classification: A61L,A61P,C08G,Y10T

Abstract:
1. A polymer consisting of two different blocks, wherein the blocks-comprise at least one L1 block and at least one L2 block and are selected from a) at least one L1 block with the formula and b) at least one L2 block with the formula wherein c) in the L1 blocks d) R groups e) in the L2 blocks f) L1 is a linkage with the following formula provided that if Y and Z are the same, they are not and wherein the symbol “•” indicates the position at which Y or Z attaches to the phenyl ring of L1; g)L2 is a linkage with the following formula provided that if Y and Z are the same, they are not and wherein the symbol “•” indicates the position at which Y or Z attaches to the phenyl ring of L2, wherein the weight average molecular weight of the polymer ranges from 38,000 to 188,000 Daltons.