| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polyester resin composition of biomass origin having flexibility in a large temperature range by improving the hard and brittle property of PHA (polyhydroxyalkanoate) and thermal decomposition during molding using a resin of biomass origin, which is of non-petroleum raw material origin. <P>SOLUTION: In the polyester resin composition, block copolymer (A) that is made of a polyalkylene terephthalate segment and polyalkylene ether segment and whose melting point is 155-200°C, aliphatic polyester (B) that is made of copolymer of 3-hydroxy butyrate and 4-hydroxy butyrate and whose melting point is 100-150°C, and epoxy compound (C) having 1-2 epoxy groups in a molecule are mixed at a weight ratio (55-70)/(20-40)/(5-25)(wt.%), and they are compounded at a melting temperature of 230°C or lower. <P>COPYRIGHT: (C)2012,JPO&INPIT |
