Patent · US Expired

Process for preparing bis-(trimethylsilyl-)urea

US3992428A · kind A · utility

3Cited by

2References

7Claims

0Family size

Assignee

Wacker Chemie AG · DE

Inventors

Horst Muller · Cologne, DE
Ignaz Bauer
Edgar Schmidt
Rudolf Riedle · Burghausen, DE

Key dates

Filing date	Feb 5, 1976
Grant date	Nov 16, 1976
Priority date	—
Expiry date	Feb 5, 1996

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07F7/10
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

An improved process for preparing bis-(trimethylsilyl-)urea which comprises reacting urea with hexamethyldisilazane in the presence of a catalytic amount of salts selected from the class consisting of ammonia, basic amine comounds and quaternary ammonium hydroxides.

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