发明名称 |
Method for preparing block polyphenylene ether-polycarbonates. |
摘要 |
<p>Block polyphenylene ether-polycarbonates are prepared by blending a mixture of at least one polyphenylene ether wherein all phenolic end groups are in the free phenol form; at least one cyclic polycarbonate oligomer, preferably an oligomer mixture; and a catalyst for conversion of cyclic polycarbonates to linear polycarbonates; and heating said mixture to polymerization temperature. The preferred catalysts are phenoxides, salts of polycarbonate oligomers and tetraphenylborate salts. The method may be conducted in the melt or in solution, and is adaptable for employment in reactive processing operations.</p> |
申请公布号 |
EP0317773(A2) |
申请公布日期 |
1989.05.31 |
申请号 |
EP19880117735 |
申请日期 |
1988.10.25 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
EVANS, THOMAS LANE;SHEA, TIMOTHY JOHN;WASSERMAN, CAROL BARBARA;CAMPBELL, JOHN ROBERT |
分类号 |
C08G81/00;C08G64/18;C08G65/48 |
主分类号 |
C08G81/00 |
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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