Silicon diimide, a process for its preparation and silicon nitride obtained therefrom

US5258169A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Ulrich Wannagat · Wolfenbüttel, DE
• Adrian Schervan · Hamm, DE
• Martin Jansen · Bonn, DE
• Hans-Peter Baldus · Burscheid, DE
• Aloys Eiling · Bochum, DE

Key dates

• Filing date: Sep 20, 1991
• Grant date: Nov 2, 1993
• Expiry date: Sep 20, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/12
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Silicon diimide having a carbon content of at most 0.5% by weight and a chlorine content of at most 20 ppm is prepared by reacting ammonia with organyl amino silane at 50.degree.-300.degree. C. at elevated pressure and is useful as an intermediate for high grade silicon nitride.