Patent · US Expired

Method for producing monoisocyanates and oligoisocyanates

US6683204B1 · kind B1 · utility

3Cited by

6References

7Claims

0Family size

Assignee

BASF SE

Inventors

Armin Stamm · Mainz, DE
Heinz-Josef Kneuper · Mannheim, DE
Lucien Thil · Schifferstadt, DE
Jochem Henkelmann · Mannheim, DE

Key dates

Filing date	Mar 4, 2002
Grant date	Jan 27, 2004
Priority date	—
Expiry date	Jun 25, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C2601/14
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to a process for the preparation of aliphatic, cycloaliphatic, araliphatic and aromatic mono- and oligoisocyanates by phosgenation of the corresponding primary amines at atmospheric pressure, which comprisesa) introducing a catalytic amount of a monoisocyanate (isocyanate a) into an inert solvent together with phosgene;b) adding the primary amine, andc) reacting the resulting reaction mixture with phosgene.

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