Patent · US Expired

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

US4952670A · kind A · utility

1Cited by

7References

8Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

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

Key dates

Filing date	Dec 22, 1988
Grant date	Aug 28, 1990
Priority date	—
Expiry date	Dec 22, 2008

Classification

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

Abstract

Polymeric hydridothiosilazanes, 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 hydridothiosilazanes, the preparation thereof, the conversion thereof into silicon nitride-containing ceramic material, and this material itself. To prepare the polymeric hydridothiosilazanes, oligohydridoalkylsilazanes (RSiHNH).sub.n are reacted with elemental sulfur and ether as solvents. The polymeric hydridothiosilazanes can then be pyrolyzed to form silicon nitride-containing ceramic material.

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