发明名称 |
Process for preparing polycarbonates. |
摘要 |
<p>A process for preparing a polycarbonate by the melt polycondensation of an aromatic dihydroxy compound and a carbonic acid diester is characterized by using an aromatic dihydroxy compound and a carbonic acid diester wherein the total content of hydrolyzable chlorine falls within a particular range. Another process for preparing a polycarbonate by the melt polycondensation of an aromatic dihydroxy compound and a carbonic acid diester, is characterized by using a catalyst comprising (a) a nitrogen-containing basic compound, (b) aromatic dihydroxy compound of an alkali metal or alkaline earth metal compound, and optionally (c) boric acid or a boric acid ester.</p> |
申请公布号 |
EP0351168(A2) |
申请公布日期 |
1990.01.17 |
申请号 |
EP19890306982 |
申请日期 |
1989.07.10 |
申请人 |
GE PLASTICS JAPAN LTD. |
发明人 |
SAKASHITA, TAKESHI MITSUI PETROCHEM. IND., LTD.;SHIMODA, TOMOAKI MITSUI PETROCHEM. IND., LTD. |
分类号 |
C08G64/30 |
主分类号 |
C08G64/30 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|