Patent ID: 8557945
Filing Date: 2013-10-15
Classification: A61L,C08G

Abstract:
1. A biodegradable polyester having a number-average molecular weight of 6000-135000 g/mol, a molecular weight distribution of from 1.2-6.5 and a crystallization temperature range of from 15° C.-105° C., comprising 94-99.9 mole percent Component A and 0.1-6 mole percent Component B, wherein Component A comprises Component A1 and Component A2 having a molar ratio of 0.35-1.6:1; Component A1 comprises 20-100 mole percent Component A11 and 0-80 mole percent Component A12; Component A11 is selected from the group consisting of aliphatic dibasic acid, cyclic aliphatic dibasic acid, esterified derivatives of aliphatic dibasic acid, esterified derivatives of cyclic aliphatic dibasic acid, and mixtures thereof; Component A12 is selected from the group consisting of an aromatic dibasic acid, an ester of an aromatic dibasic acid, and mixtures thereof; Component A2 comprises 80-99.9 mole percent Component A21 and 0.1-20 mole percent Component A22; A21 comprises at least one of the following substances: an aliphatic dibasic alcohol with a carbon atom number of C A22 comprises at least one of the following substances: a dibasic alcohol containing aromatic nucleus or a polyether dibasic alcohol containing an aromatic nucleus or a hydroxyl organic acid containing an aromatic nucleus with a carbon atom number of C Component B is Component B2; Component B2 is selected from the group consisting of an isocyanurate cyclic polybasic alcohol, an isocyanate polyether polybasic alcohol, and mixtures thereof, wherein the isocyanurate cyclic polybasic alcohol and isocyanate polyether polybasic alcohol has the molecular structure as shown in Formula III: in which, R wherein the biodegradable polyester is biodegradable.