发明名称 |
Preparation of biodegradable high molecular weight aliphatic polyesters. |
摘要 |
<p>A method for manufacturing a biodegradable high molecular weight aliphatic polyester. This method comprises the steps of: [A] synthesizing an aliphatic polyester having a number average molecular weight of at least 5,000 and/or a weight average molecular weight of at least 30,000 by reacting aliphatic or alicyclic glycol with aliphatic dicarboxylic acid or its anhydride, applying a 0.001 - 0.5 part by weight of organic or inorganic metallic compound as a catalyst with respect to 100 parts by weight of aliphatic polyester to be produced; [B] adding a 0.01 - 3 parts by weight of organic or inorganic phosphorus compound with respect to 100 parts by weight of aliphatic polyester upon completion of the reaction; and [C] reacting a 0.1 - 5 parts by weight of polyvalent isocyanate compound with 100 parts by weight of the aliphatic polyester so that the polyester has a number average molecular weight of at least 10,000 and/or a weight average molecular weight of at least 50,000.</p> |
申请公布号 |
EP0572256(A2) |
申请公布日期 |
1993.12.01 |
申请号 |
EP19930304132 |
申请日期 |
1993.05.27 |
申请人 |
SHOWA HIGHPOLYMER CO., LTD. |
发明人 |
TAKIYAMA, EIICHIRO;FUJIMAKI, TAKASHI;SEKI, SHIGEKATU;HOKARI, TAKAO;HATANO, YOSHITAKA |
分类号 |
C08G18/42;C08G63/16;C08G63/78;C08G63/82;C08G63/88;C08G63/91;C08L101/16;(IPC1-7):C08G63/91;C08G18/10 |
主分类号 |
C08G18/42 |
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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