Patent ID: 7652106

Claim:
A resin composition comprising: 50-99% by weight of a poly-3-hydroxybutyrate polymer, and 50-1% by weight of a thermoplastic polyurethane produced using: adipic acid polyester, wherein the polyester is obtained from ethylene glycol, butylene glycol and adipic acid, and an isocyanate, and satisfying the following requirements (a) and (b): (a) a glass transition temperature when heated from −100° C. at a temperature rising rate of 10° C./min by a differential scanning calorimeter is −30 to −50° C.; and (b) JIS A surface hardness is 60-95, the resin composition satisfying the following requirements (c) and (d): (c) a crystallization temperature when heated from room temperature to 180° C. at a temperature rising rate of 80° C./min by a differential scanning calorimeter, maintained at 180° C. for 1 minute, and then cooled at a temperature lowering rate of 10° C./min is 110-170° C.; and (d) a weight average molecular weight (Mw) in terms of polystyrene conversion when a component soluble in chloroform at 60° C. as measured with gel permeation chromatography is 100,000-3,000,000.