Patent · US Expired

Polymeric hydridosilazanes, processes for the preparation thereof, silicon nitride-containing ceramic materials which can be prepared therefrom, and the preparation thereof

US4939225A · kind A · utility

1Cited by

5References

7Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Tilo Vaahs · Kelkheim, DE
Thomas Gerdau · Eppstein, DE
Marcellus Peuckert · Hofheim, DE
Martin Bruck · Hofheim, DE

Key dates

Filing date	Dec 23, 1988
Grant date	Jul 3, 1990
Priority date	—
Expiry date	Dec 23, 2008

Classification

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

Abstract

Polymeric hydridosilazanes, processes for the preparation thereof, silicon nitride-containing ceramic materials which can be prepared therefrom, and the preparation thereof. The invention relates to novel polymeric hydridosilazanes, their preparation, their conversion into silicon nitride-containing ceramic material, and this material itself. To prepare the polymeric hydridosilazanes, polymeric hydridothiosilazanes are reacted with NH.sub.3. To prepare the silicon nitride-containing ceramic material, the polymeric hydridosilazanes are then pyrolyzed.

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