Patent · US Expired

Aliphatic-cycloaliphatic diisocyanates

US4613685A · kind A · utility

8Cited by

5References

5Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Gerhard Klein · Monheim, DE
Dieter Arlt · Cologne, DE

Key dates

Filing date	Jan 14, 1985
Grant date	Sep 23, 1986
Priority date	—
Expiry date	Jan 14, 2005

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C2601/08
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to diisocyanates having an isocyanate content of from about 20 to 50% by weight, optionally in the form of isomeric mixtures, characterized in that, in addition to containing a sterically unhindered isocyanate group attached to a primary aliphatic carbon atom, they contain a sterically hindered isocyanate group attached to a tertiary carbon atom which forms part of a cycloaliphatic ring system. The invention also relates to the use of the new diisocyanates, optionally blocked with blocking agents for isocyanate groups, as isocyanate component for the preparation of polyurethanes.

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