Patent ID: 9393340
Filing Date: 2016-07-19
CPC Classification: A61L,C08G,C08L

Claim Text:
1. A biodegradable material which is a chemically cross-linked product between a multivalent compound A having 3 or more functional groups X selected from the group consisting of hydroxyl group, thiol group and amino group; and a multivalent compound B having 3 or more functional groups Y selected from the group consisting of carboxyl group, isocyanate group and thioisocyanate group, wherein chemical cross-linkage(s) is/are formed by a condensation reaction of said functional group(s) X and said functional group(s) Y; wherein the value of (y+z)/(x+z) is 1.2 to 4.0 when MA≧MB, and the value of (x+z)/(y+z) is 1.2 to 4.0 when MA<MB; wherein x represents the number of the functional group(s) X which is/are not condensed with said functional group(s) Y; y represents the number of the functional group(s) Y which is/are not condensed with said functional group(s) X; z represents the number of said cross-linkage(s); MA represents weight average molecular weight of said multivalent compound A; and MB represents weight average molecular weight of said multivalent compound B.