Patent · US Expired

Polysilazanes, process for the preparation thereof, silicon nitride-containing ceramic materials which can be prepared therefrom, and the prepaation thereof

US4935481A · kind A · utility

8Cited by

7References

9Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Tilo Vaahs · Kelkheim, DE
Hans-Jerg Kleiner · Kronberg, DE
Marcellus Peuckert · Hofheim, DE
Martin Bruck · Hofheim, DE
Fritz Aldinger · Rodenbach, DE

Key dates

Filing date	Nov 3, 1988
Grant date	Jun 19, 1990
Priority date	—
Expiry date	Nov 3, 2008

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B35/589
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to novel polysilazanes, the preparation thereof, the further processing thereof to form silicon nitride-containing ceramic material, and this material itself. In order to prepare the polysilazanes, dialkylaminoorganyldichlorosilanes of the formula RsiCl.sub.2 -Nr'R' are reacted with ammonia. The polysilazanes can then be pyrolyzed to form silicon nitride-containing ceramic material. The polysilazanes according to the invention dissolve in customary aprotic solvents.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.