Patent · US Expired

Polyisocyanate mixtures, a process for their preparation and their use as cross-linking agents in coating compositions

US5473011A · kind A · utility

6Cited by

6References

6Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Hans-Josef Laas · Odenthal, DE
Rainer Rettig · Amagasaki, JP
Reinhard Halpaap · Odenthal, DE
Klaus Nachtkamp · Cologne, DE

Key dates

Filing date	Apr 15, 1992
Grant date	Dec 5, 1995
Priority date	—
Expiry date	Apr 15, 2012

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G18/8048
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to polyisocyanate mixtures having PA1 a) an average isocyanate functionality of at least 4.1, PA1 b) a (cyclo)aliphatically bound isocyanate group content (calculated as NCO, molecular weight =42) of 12.0 to 20.5% by weight, PA1 c) a chemically incorporated carboxyl group content (calculated as COOH, molecular weight =45) of 0.01 to 5.0% by weight and PA1 d) an ethylene oxide unit content arranged within terminal or lateral polyether chains of 0 to 10% by weight (calculated as C.sub.2 H.sub.4 O, molecular weight =44). The present invention also relates to a process for the preparation of these polyisocyanate mixtures and to their use as cross-linking agents in aqueous coating compositions containing water soluble or dispersible binders or binder components.

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