Patent EP0146802A1 successfully refreshed from Google Patents.
EP0146802A1
Expired / Lapsed
EP
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Hydrosilazane polymers from (R3Si)2NH and HSiCl3
Assignee: Dow Silicones Corp
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Filing: 1984-11-28
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Granted: —
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Expires: 2004-11-28
Abstract
Abstract A process is disclosed for preparing R 3 -SiNH-containing hydrosilazane polymer by contacting and reacting trichlorosilane with a disilazane (R 3 Si) 2 NH where R is vinyl, hydrogen, phenyl, or alkyl radicals containing 1 to 3 carbon atoms. These hydrosilazane polymers are useful, when fired at high temperatures, in the formation of silicon nitride and silicon nitride-containing ceramic materials.
Inventors
- 👤 John Patrick Cannady
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 18:19
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/60; C08G77/62; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/584; C04B35/589
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
70 words
A process of preparing a R 3 SiNH-containing hydrosilazane polymer, which process consists of contacting and reacting, in an inert, essentially anhydrous atmosphere, trichlorosilane with a disilazane at a temperature in the range of 25 to 300°C while distilling by-produced volatile products, wherein said disilazane has the general formula where R is selected from the group consisting of vinyl, hydrogen, phenyl, and alkyl radicals containing 1 to 3 carbon atoms.
Claim 2
Dependent Claim
70 words
A process of preparing a R 3 SiNH-containing hydrosilazane polymer, which process consists of contacting and reacting, in an inert, essentially anhydrous atmosphere, trichlorosilane with a disilazane at a temperature in the range of 25 to 300°C while distilling by-produced volatile products, wherein said disilazane has the general formula where R is selected from the group consisting of vinyl, hydrogen, phenyl, and alkyl radicals containing 1 to 3 carbon atoms.
Claim 3
Dependent Claim
14 words
A R 3 SiNH-containing hydrosilazane polymer as prepared by the process of claim 1.
References Cited (Backward Citations)
US3318823A
Cited
US4312970A
Cited
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