Patent · US Expired

Process for the preparation of multi-layer coatings of the water-borne base coat/powder clear coat type

US6355303B1 · kind B1 · utility

6Cited by

2References

8Claims

0Family size

Assignee

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

Inventors

Bettina Vogt-Birnbrich · Solingen, DE
Armin Goebel · Wetter, DE
Holger Schmidt · Wuppertal, DE
Werner Bosch · Wuppertal, DE
Frank Mueller · Cincinnati, US
Kornelia Wetzel · Wuppertal, DE

Key dates

Filing date	Apr 28, 2000
Grant date	Mar 12, 2002
Priority date	—
Expiry date	Apr 28, 2020

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31786
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for multi-layer coating by application of a base coat layer of a water-borne base coat to a substrate and subsequent application of a clear coat layer of a powder clear coat, followed by joint baking of both coating layers, wherein said water-borne base coat contains an effective amount, preferably 0.5 to 10 wt. %, of one or more water-insoluble cellulose esters, largely avoids the formation of blisters in the powder clear coat layer.

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