| abstract |
A thermoplastic polyurethane resin is prepared by the reaction of n (A) p-phenylene diisocyanate, n (B) a hydroxyl terminated poly(hexamethylene carbonate) polyol having a molecular weight of 850 to 5000 and n (C) a short chain polyol having 2 to 10 carbon atoms as the chain extending agent, n the molar ratio of (B) : (C) being 1:2 to 1:0.05, and the molar ratio of isocyanate groups : total active hydrogen groups being 0.93:1 to 1.20:1. |