Method for pretreating and/or coating metallic surfaces with a paint-like coating prior to forming and use of substrates coated in this way

US7615257B2 · kind B2 · utility

Assignee

• CHEMETALL GMBH · DE

Inventors

• Christian Jung · Hallstadt, DE
• Toshiaki Shimakura · Chiba, JP
• Norbert Maurus · Langen, DE
• Heribert Domes · Weilmünster, DE
• Hardy Wietzoreck · Frankfurt am Main, DE
• Klaus Bittner · Frankfurt am Main, DE
• Thomas Kolberg · Heppenheim, DE
• Marcus Schinzel · Eppstein, DE

Key dates

• Filing date: Oct 10, 2001
• Grant date: Nov 10, 2009
• Expiry date: Jan 25, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31678
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a method for coating a metallic strip. The strip or optionally, the strip sections produced from said strip in the subsequent process, is/are first coated with at least one anticorrosion layer—according to an alternative form of embodiment, this can be left out—and then with at least one layer of a paint-like coating containing polymers. After being coated with at least one anticorrosion layer or after being coated with at least one layer of a paint-like coating, the strip is divided into strip sections. The coated strip sections are then formed, joined and/or coated with at least one (other) paint-like coating and/or paint coating. The paint-like coating is formed by coating the surface with an aqueous dispersion containing the following in addition to water: a) at least one organic film former containing at least one water-soluble or water-dispersed polymer with an acid value of 5 to 200; b) at least one inorganic compound in particle form with an average particle diameter measured on a scanning electron microscope of 0.005 to 0.3 μm; and c) at least one lubricant and/or at least one corrosion inhibitor. The metallic surface that is optionally coated with…