Patent · US Expired

Stabilized blocked isocyanates and their use in polyurethane stoving lacquers

US6242530A · kind A · utility

10Cited by

12References

4Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Eberhard Konig · Kronberg, DE
Karl-Ludwig Noble · Cologne, DE
Theodor Engbert · Recklinghausen, DE

Key dates

Filing date	Sep 3, 1997
Grant date	Jun 5, 2001
Priority date	—
Expiry date	Sep 3, 2017

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G18/80
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to (cyclo)aliphatic polyisocyanates which have a content of blocked and unblocked isocyanate groups (calculated a NCO) of 5 to 25 wt. %, in which at least 95% of the isocyanate groups are present in a form blocked with blocking agents, and which also contain 0.1 to 5.0 wt. % of amines having a structural unit corresponding to formula (I) ##STR1## The present invention also relates to the use of the blocked polyisocyanates according to the invention as crosslinking agents for organic polyhydroxyl compounds in 1C-PUR stoving lacquers, especially for automotive clearcoats and coil coating lacquers.

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