Patent · US Expired

Process for the production of a multicoat protective and/or decorative finish

US5368944A · kind A · utility

45Cited by

4References

6Claims

0Family size

Assignee

Basf Lacke & Farben Aktiengesellschaft · DE

Inventors

Michael H. Hartung · Tucson, US
Walter Lassmann · Munster, DE
Ulrich Poth · Munster, DE
Egon Wegner · Munster, DE

Key dates

Filing date	Sep 3, 1993
Grant date	Nov 29, 1994
Priority date	—
Expiry date	Sep 3, 2013

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31605
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to a process for the production of multicoat finishes, in which PA0 (1) an aqueous pigmented basecoat containing a waterthinnable polyurethane resin is applied to the substrate surface as basecoat, PA0 (2) a polymer film is formed from the coating applied in stage (1), PA0 (3) a transparent topcoat is applied to the basecoat obtained in this way and subsequently PA0 (4) the basecoat is baked together with the topcoat, and the water-thinnable polyurethane resin contains structural units of the formula ##STR1## X representing a divalent aromatic hydrocarbon radical and R.sup.1 and R.sup.2 representing an alkyl radical having 1 to 4 carbon atoms.

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