Patent ID: 6555645
Filing Date: 2003-04-29
Classification: C08G

Abstract:
A degradable polyurethane resin resulting from reaction of polyol with 2,5/2,6-diisocyanatomethylbicyclo[2.2.1]heptane represented by the formula (1): wherein the two isocyanatomethyl groups are located on 2,5-positions or 2,6-positions or a mixture thereof, and/or a modified compound thereof, wherein the polyol is (A) polyhydroxycarboxylate polyol wherein the polyhydroxycarboxylate polyol is obtained by modification of the terminal carboxyl group to a hydroxyl group in the aliphatic polyhydroxycarboxylic acid represented by the formula (2): wherein R1 is an alkylene group having 1 to 4 carbon atoms in the straight chain portion and having 1 to 6 total carbon atoms which include branched alkyl groups, and m is an integer of 1 or more, or a mixture or copolycondensate of (A) and one or more compounds selected from (B) aliphatic polyesterpolyol and (C) saccharides.