发明名称 |
Chromatographic column packing having a bonded organosiloxane coating |
摘要 |
Improved packings for columns useful in gas chromatography are made by a multistep process whereby polysiloxane molecules having various organic substituents are chemically bonded to the surface of a siliceous support. The process comprises one or more cycles of successive reactions with an activated support surface of silicon tetrachloride, an organic dichlorosilane, silicon tetrachloride a second time, a polysiloxane polyol, with intermediate hydrolyses where appropriate to provide reactive terminal silanol groups and a final capping reaction with an organic monochlorosilane. The packing as so prepared is further improved by coating with a conventional stationary phase. |
申请公布号 |
US4276061(A) |
申请公布日期 |
1981.06.30 |
申请号 |
US19800149868 |
申请日期 |
1980.05.14 |
申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
NESTRICK, TERRY J.;STEHL, RUDOLPH H. |
分类号 |
B01J20/286;B01J20/32;C08G83/00;(IPC1-7):01D15/08 |
主分类号 |
B01J20/286 |
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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