| 发明名称 |
PROCESS FOR PREPARING POLYHYDROXY CARBOXYLIC ACID |
| 摘要 |
<p>The present invention provides a process for producing polyhydroxycarboxylic acids having a weight-average molecular weight of 50,000 or above which are excellent as biodegradable plastics by subjecting Lactides to ring-opening polymerization in the presence of an inorganic solid acid catalyst carrying silica and/or a light metal.</p> |
| 申请公布号 |
EP0795571(A1) |
申请公布日期 |
1997.09.17 |
| 申请号 |
EP19960932805 |
申请日期 |
1996.10.03 |
| 申请人 |
KYOWA HAKKO KOGYO CO., LTD. |
发明人 |
YANAGISAWA, NORIO;MURAYAMA, TOSHIKAZU;TSUZAKI, NOBUKO;YOKOMORI, YOROZU |
| 分类号 |
C08G63/82;(IPC1-7):C08G63/08 |
主分类号 |
C08G63/82 |
| 代理机构 |
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