Biodegradable material and method of producing biodegradable material

摘要

A biodegradable material has an improved biodegradability, an enhanced shape recovery rate after deformation of the material and an improved flexibility. The biodegradable material is a chemically cross-linked product of: a multivalent compound A having 3 or more functional groups X such as hydroxyl group; a multivalent compound B having 3 or more functional groups Y such as carboxyl group; and a compound C having a structure originated from a hydroxycarboxylic acid whose homopolymer formed by homopolymerization has a glass transition point of −40° C. or lower.

主权项

1. A biodegradable material which is a chemically cross-linked product of:
a multivalent compound A having 3 or more functional groups X selected from the group consisting of hydroxyl group, thiol group and amino group; a multivalent compound B having 3 or more functional groups Y selected from the group consisting of carboxyl group, isocyanate group and thioisocyanate group; and a compound C which is a copolymer of a hydroxycarboxylic acid(s) and a monomer(s) of a water-soluble polymer(s) selected from the group consisting of polyethylene glycol, polypropylene glycol, polyvinyl alcohol, polyhydroxyethyl acrylate, polyhydroxyethyl methacylate, carboxymethyl cellulose, hydroxymethyl cellulose and hydroxyethyl cellulose, wherein the hydroxycarboxylic acid(s) is selected from a homopolymer formed by homopolymerization and has a glass transition point of −40° C. or lower, and wherein the compound C has a degree of branching of 5 to 16.