发明授权
- 专利标题： Process for the manufacture of polycarbonate-oligomers without solvent
- 专利标题（中）： 无溶剂制造聚碳酸酯低聚物的方法
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申请号： US278358申请日： 1994-07-21
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公开(公告)号： US5461121A公开(公告)日： 1995-10-24
- 发明人: Niles R. Rosenquist
- 申请人： Niles R. Rosenquist
- 申请人地址： MA Pittsfield
- 专利权人： General Electric Co.
- 当前专利权人： General Electric Co.
- 当前专利权人地址： MA Pittsfield
- 主分类号： C08G64/00
- IPC分类号： C08G64/00 ; C08G64/18 ; C08G64/42 ; C08G77/42 ; C08G77/448 ; C08G81/00
摘要：
Polycarbonate oligomers having hydroxy end groups are produced by a melt reaction with bisphenol-A and a basic catalyst. The oligomers may then be reacted with chloro end-group siloxanes in the presence of a solvent and an acid acceptor to yield polycarbonate-polysiloxane block co-polymers. The melt reaction occurs at elevated temperature without the direct use of phosgene gas.
公开/授权文献
- US4914018A Antistatic photographic base and light-sensitive element 公开/授权日：1990-04-03
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