发明名称 |
Process for preparing polyacrylates. |
摘要 |
<p>A process for preparing polyarylate having a reduced viscosity of from about 0.5 to greater than 1.0 dl/gm comprises the following steps: (a) reacting an acid anhydride derived from an aliphatic monocarboxylic acid containing from 2 to 8 carbon atoms with at least one dihydric phenol to form the corresponding diester; (b) after forming the diester, removing by vacuum distillation the bulk of the residual acid anhydride, then adding acetic acid, then vacuum distilling to bring the anhydride concentration to a level low enough to enable the formation of a polymer having a low color and good thermal stability; and (c) reacting said diester with at least one aromatic dicarboxylic acid at a temperature sufficient to form the polyarylate. Polyarylates made by the process are improved in respect of melt stability and low color.</p> |
申请公布号 |
EP0399715(A2) |
申请公布日期 |
1990.11.28 |
申请号 |
EP19900305190 |
申请日期 |
1990.05.15 |
申请人 |
AMOCO CORPORATION |
发明人 |
SEE, BENITO;STEINER, ULRICH ALFRED |
分类号 |
B01D3/10;C08F2/04;C08F2/06;C08G63/18;C08G63/19;C08G63/78 |
主分类号 |
B01D3/10 |
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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