发明名称 |
Process for preparing polyarylates in the presence of a diphenyl ether compound and a magnesium catalyst. |
摘要 |
<p>The present invention deals with a process for preparing polyarylates in the presence of a diphenyl ether compound and a magnesium catalyst.
<??>According to the invention, polyarylates are prepared by the reaction of a diester derivative of a dihydric phenol with an aromatic dicarboxylic acid in the presence of from about 10 to about 60 weight percent of a diphenyl ether compound at a temperature of from about 260 to 350 DEG C and in the presence of a magnesium catalyst.
<??>This process provides a polyarylate of acceptable molecular weight with a better removal of the acid by-product in a reactant system having a reduced viscosity. </p> |
申请公布号 |
EP0026121(A1) |
申请公布日期 |
1981.04.01 |
申请号 |
EP19800401220 |
申请日期 |
1980.08.26 |
申请人 |
UNION CARBIDE CORPORATION |
发明人 |
MARESCA, LOUIS MICHAEL;GILL, PETER JOHN;BERGER, MITCHELL HARVEY |
分类号 |
C08G63/682;C08G63/00;C08G63/18;C08G63/19;C08G63/81;C08G63/83;(IPC1-7):08G63/18;08G63/30;08G63/22 |
主分类号 |
C08G63/682 |
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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