发明授权
- 专利标题: Siloxane bischloroformates
- 专利标题(中): 硅氧烷双氯甲酸酯
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申请号: US10739998申请日: 2003-12-17
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公开(公告)号: US06930194B2公开(公告)日: 2005-08-16
- 发明人: James Manio Silva , David Michel Dardaris , Gary Charles Davis
- 申请人: James Manio Silva , David Michel Dardaris , Gary Charles Davis
- 申请人地址: US NY Niskayuna
- 专利权人: General Electric Company
- 当前专利权人: General Electric Company
- 当前专利权人地址: US NY Niskayuna
- 代理商 Andrew J. Caruso; William E. Powell, III
- 主分类号: C08G64/26
- IPC分类号: C08G64/26 ; C07F7/04 ; C07F7/08 ; C07F7/10 ; C07F7/18 ; C08G77/04 ; C08G77/06 ; C08G77/385
摘要:
Siloxane bischloroformates are prepared in a continuous process by phosgenating siloxane bisphenols in a flow reactor using a substantial excess of phosgene and sodium hydroxide. While very high levels (>95%) of conversion of the siloxane bisphenol to the corresponding siloxane bischloroformate are achieved using a flow reactor according to the method of the invention, only more modest conversion (˜90%) of the siloxane bisphenol to the corresponding siloxane bischloroformate is attained when analogous batch processes are employed. The process holds promise for use in the manufacture of silicone-containing copolycarbonates which requires high purity siloxane bischloroformate intermediates.
公开/授权文献
- US20040133024A1 Siloxane bischloroformates 公开/授权日:2004-07-08