Patent · US Expired

Diisocyanates and their use for the preparation of polyurethanes

US4835239A · kind A · utility

2Cited by

5References

14Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

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

Key dates

Filing date	Jun 27, 1986
Grant date	May 30, 1989
Priority date	—
Expiry date	Jun 27, 2006

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 suitable for use as coatings.

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