Patent · US Active

Method of passivating metallic surfaces by means of copolymers having phosphoric acid and/or phosphonic acid groups

US8568522B2 · kind B2 · utility

2Cited by

3References

15Claims

0Family size

Assignee

BASF SE

Inventors

Frank Klippel · Ludwigshafen, DE
Alexander Gothlich · Mannheim, DE
Gunnar Schornick · Neuleiningen, DE
Dietrich Fehringer · Dielheim, DE
Thomas Heidenfelder · Münstermaifeld, DE
Helmut Witteler · Monsheim, DE
Walter Bertkau · Ludwigshafen, DE

Key dates

Filing date	Jul 18, 2007
Grant date	Oct 29, 2013
Priority date	—
Expiry date	Jun 13, 2029

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC23C22/36
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

Process for passivating metallic surfaces, and a preparation suitable for implementing the process, comprising at least water, an acid, and a copolymer of functionalized (meth)acrylic esters, monomers containing phosphoric and/or phosphonic acid groups, monomers having COOH groups, and, if appropriate, further monomers. Copolymer which comprises said monomers.

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