Patent · US Active

Composition for coating of metallic surfaces with good adhesion, in particular aluminum materials

US11346002B2 · kind B2 · utility

0Cited by

0References

20Claims

0Family size

Assignee

CHEMETALL GMBH · DE

Inventors

Lars Sebralla · Bruchköbel, DE
Stefan Birkenheuer · Shanghai, CN
Manfred Walter · Nuremberg, DE
Nawel Souad Khelfallah · Frankfurt am Main, DE

Key dates

Filing date	Dec 15, 2015
Grant date	May 31, 2022
Priority date	—
Expiry date	May 8, 2038

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC23C2222/20
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The present invention relates to an acidic aqueous composition for coating metallic surfaces, particularly of aluminium materials, that comprises, besides water and optionally further components, a) at least one compound selected from the group consisting of organoalkoxysilanes, organosilanols, polyorganosilanols, organosiloxanes and polyorganosiloxanes, b) at least one compound selected from the group consisting of titanium, zirconium, hafnium and aluminium compounds and silicon complex fluoride, and c) at least one copolymer which is stable at least in a segment of the pH range below 6 and which comprises, in alternating configuration, monomer units containing at least one carboxylic and/or phosphonic acid group and monomer units containing no acid group. The invention further relates to a corresponding coating method and to the use of the substrates coated by this method.

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