Polymeric hydridochlorosilazanes and processes for their preparation

US5008423A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Thomas Gerdau · Eppstein, DE
• Hans-Jerg Kleiner · Kronberg, DE
• Marcellus Peuckert · Hofheim, DE
• Martin Bruck · Hofheim, DE
• Fritz Aldinger · Rodenbach, DE

Key dates

• Filing date: Sep 22, 1988
• Grant date: Apr 16, 1991
• Expiry date: Sep 22, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/62
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to novel polymeric hydridochlorosilazanes and a process for their preparation. The compounds according to the invention can be converted into polyhydridosilaznes by reaction with ammonia, and these can in turn be pyrolyzed to ceramic material containing silicon nitride. To prepare the polymeric hydridochlorosilazanes, oligohydridoalkylsilazanes (R.sup.1 SiHNH).sub.n are reacted with a dichlorohydridoalkylsilane R.sup.2 SiHCl.sub.2.