| 摘要 |
<p>PURPOSE: A resin composition is provided to have excellent tensile strength and elongation while having excellent biodegradability and hydrolytic resolution, thereby being used for various uses such as a garbage bag. CONSTITUTION: A resin composition includes 10-60 wt% of an aliphatic polyester of which the melting point is 30-200°C, the number average molecular weight is 1,500-150,000, and the weight average molecular weight is 1,500-300,000; and 90-40 wt% of a polyester urethane of which the melting point is 120-200°C, the number average molecular weight is 1,000-150,000, and the surface hardness is 50-120. The aliphatic polyester is manufactured by the esterification and deglycolysis reaction of an aliphatic dicarboxylic acid or an acid anhydride thereof with an aliphatic glycol or by the esterification and deglycolysis reaction of an aliphatic unsaturated dicarboxylic acid or an acid anhydride thereof with an aliphatic unsaturated glycol.</p> |
