发明名称 |
Process for producing polyester by ring-opening copolymerization |
摘要 |
This invention provides a process for producing with industrially good efficiency a polyester having a high melting point and biodegradability. In this process, ring-opening copolymerization of a cyclic acid anhydride containing succinic anhydride as a main component with a cyclic ether containing ethylene oxide as a main component is carried out in the presence of a catalyst by introducing successively the cyclic ether into a reaction vessel containing the cyclic acid anhydride in a melting state or solution state. The rate per hour of introducing the cyclic ether is within the range of 3 to 90 parts by weight per 100 parts by weight of the cyclic acid anhydride, and the reaction vessel has an inside pressure within the range of atmospheric pressure to 50 kgf/cm2 as a gauge pressure.
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申请公布号 |
US5391700(A) |
申请公布日期 |
1995.02.21 |
申请号 |
US19940233649 |
申请日期 |
1994.04.26 |
申请人 |
NIPPON SHOKUBAI CO., LTD. |
发明人 |
ITOH, HIROSHI;NAMBA, TAKASHI;KOBAYASHI, HIROYA;YUKITAKE, MASASHI |
分类号 |
C08G63/42;(IPC1-7):C08G63/42 |
主分类号 |
C08G63/42 |
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