发明名称 |
Method for preparing poly-p-dioxanone polymer |
摘要 |
Poly-p-dioxanone is prepared in a process comprising: (a) heating a reaction mixture comprising p-dioxanone and an effective amount of a polymerization catalyst under conditions of temperature and pressure effective to produce a reaction product mixture comprising molten poly-p-dioxanone and unreacted p-dioxanone; (b) adding to said reaction product mixture a cyclic anhydride under conditions effective for reaction of the poly-p-dioxanone with the cyclic anhydride to form an end-capped poly-p-dioxanone; (c) exposing the reaction product mixture to a temperature within the range of about 50 to about 150 DEG C. under reduced pressure and removing unreacted p-dioxanone from the reaction product mixture; and (d) recovering the end-capped poly-p-dioxanone. The invention process permits the economical production of high molecular weight poly-p-dioxanone in the melt.
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申请公布号 |
US5652331(A) |
申请公布日期 |
1997.07.29 |
申请号 |
US19960697805 |
申请日期 |
1996.08.30 |
申请人 |
SHELL OIL COMPANY |
发明人 |
FORSCHNER, THOMAS CLAYTON;GWYN, DAVID ERIC;VEITH, CARY ALAN |
分类号 |
C08G63/78;C08G63/664;(IPC1-7):C08G63/08 |
主分类号 |
C08G63/78 |
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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