Patent · US Active

Passivating alkaline composition on the basis of water glass

US9777165B2 · kind B2 · utility

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0References

17Claims

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Assignee

Henkel AG & Co. KGaA · DE

Inventors

Juergen Stodt · Neuss, DE
Michael Wolpers · Erkrath, DE
Marcel Roth · Goldkronach, DE

Key dates

Filing date	Mar 19, 2015
Grant date	Oct 3, 2017
Priority date	—
Expiry date	Jul 30, 2035

Classification

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

Abstract

The present invention relates to an alkaline aqueous composition on the basis of water glass and organosilanes with non-hydrolysable substituents which have a primary amino group in the substituents, for providing corrosion-protected coatings on metal surfaces which convey good reshaping properties in metal processing. For the desired functionality, the compositions according to the invention contain the organosilane and the water glass in a predetermined ration. The invention further relates to a method for pre-treating metal surfaces using the alkaline aqueous compositions, which method provides excellent results with regard to corrosion protection, varnish adhesion and reshapability, particularly on aluminum and on steel strips provided with aluminum alloy metal coatings.

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