发明名称 |
SILOXANE BISCHLOROFORMATES |
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.
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申请公布号 |
US2004039218(A1) |
申请公布日期 |
2004.02.26 |
申请号 |
US20020223030 |
申请日期 |
2002.08.16 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
SILVA JAMES MANIO;DARDARIS DAVID MICHEL;DAVIS GARY CHARLES |
分类号 |
C08G64/26;C07F7/04;C07F7/08;C07F7/10;C07F7/18;C08G77/04;C08G77/06;C08G77/385;(IPC1-7):C07F7/08 |
主分类号 |
C08G64/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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