Patent · US Expired

Multistage continuous preparation of cycloaliphatic diisocyanates

US7339074B2 · kind B2 · utility

2Cited by

22References

43Claims

0Family size

Assignee

Degussa AG · DE

Inventors

Stephan Kohlstruk · Marl, DE
Manfred Kreczinski · Herne, DE
Rainer Elm · Marl, DE
Hans-Werner Michalczak · Herne, DE

Key dates

Filing date	Aug 23, 2004
Grant date	Mar 4, 2008
Priority date	—
Expiry date	Jan 28, 2026

Classification

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

Abstract

The invention relates to a multistage process for continuous and phosgene-free preparation of cycloaliphatic diisocyanates.

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