发明名称 |
Verfahren zur Herstellung von Copolyestern auf Basis von Milchsäure und Verpackungsmaterial |
摘要 |
<p>A process for producing a lactic acid-based copolyester by the ring-opening copolymerization and transesterification of a lactide (A) with an aromatic polyester (B) and/or an aliphatic polyester (C) in the presence of a ring-opening polymerization catalyst (D), and a packaging material comprising the lactic acid-based copolyester obtained by the process are disclosed. According to the present invention, a lactic acid-based degradable copolyester which has a sufficiently high molecular weight and satisfactory toughness and also has suitable rigidity, pliability, and transparency according to applications can be produced. Further, a general-purpose packaging material, e.g., a sheet or film, which comprises the lactic acid-based copolyester produced by the process and is excellent in formability, degradability, and transparency can also be produced.</p> |
申请公布号 |
DE69424336(T2) |
申请公布日期 |
2000.08.24 |
申请号 |
DE1994624336T |
申请日期 |
1994.03.28 |
申请人 |
DAI NIPPON INK AND CHEMICALS, INC. |
发明人 |
EBATO, HIROSHI;OYA, SATOSHI;KAKIZAWA, YASUTOSHI;FURUTA, HIDEYUKI;ARAI, KOSUKE |
分类号 |
C08G63/08;C08G63/60;C08G63/78;C08L67/00;C08L67/02;C08L67/04;(IPC1-7):C08G63/91 |
主分类号 |
C08G63/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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