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Title:
シロキサンビスクロロホルメート
Document Type and Number:
Japanese Patent JP4776923
Kind Code:
B2
Abstract:
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.

Inventors:
Silva, James Manio
Dahldaris, david michael
Davis, Gary Charles
Application Number:
JP2004529073A
Publication Date:
September 21, 2011
Filing Date:
June 10, 2003
Export Citation:
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Assignee:
Subic Innovative Plastics IP Besloten Fennaught Shap
International Classes:
C08G64/26; C08G77/385; C07F7/04; C07F7/08; C07F7/10; C07F7/12; C07F7/18; C08G77/04; C08G77/06
Domestic Patent References:
JPH08169947A1996-07-02
JPH04268369A1992-09-24
JPH09183837A1997-07-15
JPH072999A1995-01-06
JPH05222173A1993-08-31
JPH0525266A1993-02-02
JPH05263865A1993-10-12
JPH09265663A1997-10-07
JPS58108225A1983-06-28
JPS58108226A1983-06-28
JPH0379626A1991-04-04
JPH08325368A1996-12-10
JPH08325370A1996-12-10
JPH05247195A1993-09-24
Foreign References:
WO1991000885A11991-01-24
WO2002004545A12002-01-17
WO2002008311A22002-01-31
Attorney, Agent or Firm:
Yasuhiko Murayama
Masatake Shiga
Takashi Watanabe
Shinya Mitsuhiro



 
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