Patent · US Expired

Cycloaliphatic diisocyanates optionally in the form of isomer mixtures and a process for their production

US4879408A · kind A · utility

3Cited by

3References

5Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Hartmut Knofel · Odenthal, DE
Michael Brockelt · Bensberg, DE
Stefan Penninger · Pulheim, DE
Herbert Stutz · Karlsruhe, DE

Key dates

Filing date	Apr 7, 1987
Grant date	Nov 7, 1989
Priority date	—
Expiry date	Apr 7, 2007

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G18/758
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Diisocyanates and isomer mixtures of diisocyanates corresponding to the formula ##STR1## in which R.sup.1, R.sup.2, m and n are as defined herein are produced by phosgenating diamines and isomer mixtures of diamines corresponding to the formula ##STR2## in which R.sup.1, R.sup.2, m and n are as defined herein. These diisocyanates which are liquid at room temperature and highly compatible with polyols are particularly useful in the production of polyurethanes.

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