| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a transparent copolyester which overcomes the low-transparency defect of polylactic acid resin materials and has a good toughness. <P>SOLUTION: The present invention relates to a transparent copolyester, wherein the transparent copolyester comprises an aliphatic-aromatic copolyester segment A, a segment B having repeating units -O-CH(CH<SB POS="POST">3</SB>)-C(O)-, and structural units C derived from polyisocyanate(s), wherein the weight ratio for the segment A, segment B and structural unit C is 100:(100-2,000):(0.1-10) and wherein the weight-average molecular weight Mw of the transparent copolyester is from 50,000 to 1,000,000. <P>COPYRIGHT: (C)2013,JPO&INPIT |
