发明授权
- 专利标题: Process for producing polycarbonate
- 专利标题(中): 生产聚碳酸酯的方法
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申请号: US851806申请日: 1992-03-16
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公开(公告)号: US5434227A公开(公告)日: 1995-07-18
- 发明人: Tsutomu Yamato , Yasuhiro Oshino , Yutaka Fukuda , Tatsuya Kanno , Takaaki Kuwana , Yoshimichi Okano
- 申请人: Tsutomu Yamato , Yasuhiro Oshino , Yutaka Fukuda , Tatsuya Kanno , Takaaki Kuwana , Yoshimichi Okano
- 申请人地址: JPX Osaka
- 专利权人: Daicel Chemical Industries, Ltd.
- 当前专利权人: Daicel Chemical Industries, Ltd.
- 当前专利权人地址: JPX Osaka
- 优先权: JPX3-198964 19910508; JPX3-290176 19911106; JPX3-290177 19911106; JPX3-290178 19911106; JPX3-293037 19911108; JPX3-293038 19911108; JPX3-293039 19911108; JPX3-303584 19911119; JPX3-334083 19911121; JPX3-334084 19911121; JPX3-314736 19911128
- 主分类号: C08G64/30
- IPC分类号: C08G64/30 ; C08F2/00 ; C08G64/00
摘要:
A polycarbonate is produced by transesterification from a dihydroxy compound such as 2,2-bis(4-hydroxyphenyl)propane and a diester of carbonic acid such as bisphenyl carbonate in the presence of a substance containing iron in an amount of 50% by weight or less to contact the reactants. Also, a polycarbonate is produced by transesterification from a dihydroxy compound and a diester of carbonic acid in a reactor made of stainless steel and treated by electropolishing or acid pickling or buffed on a surface part thereof to contact the reactants. As the transesterification catalyst, (a) a nitrogen-containing, electron-donating compound and (b) a nitrogen-containing, electron-donating compound and an alkali metal compound or an alkaline earth metal compound are preferably used.
公开/授权文献
- US5871683A Method of molding skate components 公开/授权日:1999-02-16