发明授权
- 专利标题： Method of producing copolymerized polycarbonates
- 专利标题（中）： 共聚聚碳酸酯的制备方法
-
申请号： US334702申请日： 1994-11-04
-
公开(公告)号： US5510450A公开(公告)日： 1996-04-23
- 发明人: Takeshi Sakashita , Tomoaki Shimoda , Takashi Nagai
- 申请人： Takeshi Sakashita , Tomoaki Shimoda , Takashi Nagai
- 申请人地址： MA Pittsfield
- 专利权人： General Electric Company
- 当前专利权人： General Electric Company
- 当前专利权人地址： MA Pittsfield
- 优先权： JPX4-35306 19920221; JPX3-76478 19920409
- 主分类号： C08G64/30
- IPC分类号： C08G64/30 ; C08G64/00
摘要：
The object of the present invention is to provide a method of producing copolymerized polycarbonates having improved flow and formability, in addition to excellent mechanical properties, heat resistance, transparency, and color tone.A method of producing copolymerized polycarbonates by melt polycondensation of two or more aromatic dihydroxy compounds with a carbonate diester, characterized in that(i) resorcin and/or substituted resorcins are used as 2-90 mole % of the aromatic dihydroxy compounds, where the sum of all the aromatic dihydroxy compounds is taken as 100 mole %, and(ii) an alkali metal compound and/or an alkaline-earth metal compound (a) is used as the catalyst.
公开/授权文献
- US4892163A Weighing device for strain gauges 公开/授权日：1990-01-09