Polymer-containing pre-rinse prior to a conversion treatment

US11230768B2 · kind B2 · utility

Assignee

• Henkel AG & Co. KGaA · DE

Inventors

• Sophie Cornen · Goldkronach, DE
• Kristof Wapner · Mülheim an der Ruhr, DE
• Ralf Posner · Dormagen, DE
• Natascha Henze · Leverkusen, DE
• Kirsten Agnes Lill · Goldkronach, DE
• Michiel Gerard Maas · Leverkusen, DE

Key dates

• Filing date: Oct 13, 2017
• Grant date: Jan 25, 2022
• Expiry date: Nov 25, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D2111/16
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A multi-step method for anti-corrosion pretreatment of components made from metallic materials, in which a wet chemical treatment with an aqueous composition (A) containing a dissolved and/or dispersed polymer P, which is substituted with heterocycles containing at least one quaternary nitrogen heteroatom, is followed by a conversion treatment based on water-soluble compounds of the elements Zr, Ti, and/or Si before further anti-corrosion coatings are optionally applied.