| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing a polymer composition that provides a polymer composition which simultaneously achieves high elastic modulus and low permanent elongation at a high level and also which can be molded with good moldability even when high moldability is required. <P>SOLUTION: The polymer composition is obtained by mixing a molten mixture of polymers with a block copolymer composition which comprises a block copolymer A and a block copolymer B, each block copolymer having specific structure, and has a weight-average molecular weight as a whole of less than 300,000, wherein the molten mixture of polymers is obtained by performing melt mixing of a polymer α having a weight-average molecular weight of 300,000-6,000,000 and molecular weight distribution of 2.0-10.0 with a thermoplastic polymer β having a weight-average molecular weight of less than 300,000. <P>COPYRIGHT: (C)2012,JPO&INPIT |
