Production of a multilayer coating

US4894261A · kind A · utility

Assignee

• BASF SE

Inventors

• Erich Gulbins · Heidelberg, DE
• Gregor Ley · Wattenheim, DE

Key dates

• Filing date: Jul 8, 1988
• Grant date: Jan 16, 1990
• Expiry date: Jul 8, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D157/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A multilayer coating is produced on a substrate by a process in which an aqueous dispersion containing PA0 (A) a carbonyl-containing copolymer of monoolefinically unsaturated compounds, not less than 10% by weight of which have carbonyl groups which react with hydrazide groups, and PA0 (B) polyhydrazides, is applied as a base coat to the substrate, the water is flashed off and one or more further conventional coats are applied to this base coat as a dispersion or solution, the solvent is flashed off and, if required, the resulting multilayer coating is baked for from 10 to 60 minutes at from 70.degree. to 180.degree. C.