| 摘要 |
PURPOSE: A polyester-polyacetal block copolymer is provided to be biodegradable and to have excellent physical properties as engineering plastics. CONSTITUTION: In a polyester-polyacetal block copolymer, polyacetal is coupled to a polyester. The polyester is obtained by reacting a dicarboxylic acid component and diol component. The dicarboxylic component consists of 25-95 mol% of an aliphatic dicarboxylic acid or a derivative thereof, 3-70 mol% of an aromatic dicarboxylic acid or a derivative thereof, 1-5 mol% of a dicarboxylic acid which contains a metal sulfonate group, 3-70 mol% of an aromatic dicarboxylic acid or a derivative thereof, and 1-5 mol% of a dicarboxylic acid which contains a metal sulfonate group. The diol component consists of 75-99 mol% of a C1-6 alkanediol and 1-25 mol% of ether group-containing diol.
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