Process for producing gravel-impact-resistant multicoat lacquer finishes and paste filler usable therefor

US5385656A · kind A · utility

Assignee

• Herberts Gesellschaft mit beschrankter Haftung · DE

Inventors

• Klaus-Peter Doebler · Radevormwald, DE
• Wolfgang Goldner · Heiligenhaus, DE
• Roland Grutter · Wuppertal, DE
• Reiner Jungermann · Dortmund, DE
• Manfred Oppermann · Wuppertal, DE

Key dates

• Filing date: Jul 22, 1992
• Grant date: Jan 31, 1995
• Expiry date: Jul 22, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L77/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A process for producing a gravel-impact-resistant multicoat lacquer finish by cathodic electrodeposition of a primer on an electrically conductive substrate, subsequent application of a primer surfacer coat of an aqueous paste filler that contains one or several water-dilutable binders that are curable at temperatures up to 180.degree. C., with subsequent application of one or several base coats and finishing coats. To produce the primer surfacer coat, an aqueous paste filler is used that contains 0.1-20 wt % polyamide powder, polyacrylonitrile powder or mixtures thereof with particle diameters in the range 0.1-100 .mu.m, wherein the high-solid value of the aqueous paste filler is not less than 75 wt %.