Patent · US Expired

Double-layer varnish comprising an aqueous base varnish and clear varnish with improved clear varnish wetting limit

US6565979B1 · kind B1 · utility

1Cited by

2References

18Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

Werner Bosch · Wuppertal, DE
Oliver Kraus Vom Cleff · Wuppertal, DE
Marco Taschner · Sprockhövel, DE

Key dates

Filing date	May 14, 2001
Grant date	May 20, 2003
Priority date	—
Expiry date	May 14, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31605
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The use of linear and/or branched polyethylene oxide homopolymers, polypropylene oxide homopolymers and/or polyethylene/polypropylene oxide copolymers with randomly distributed ethylene oxide and propylene oxide units, which may be partly or completely etherified with C1-C4-alkanols, with an average molecular weight of more than 1000 to 8000, for reducing the clear lacquer wetting limits during two-layered lacquering with aqueous base lacquer/clear lacquer and suitable base lacquers.

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