Patent · US Active

Passivation composition comprising a silane-modified silicate compound

US10792702B2 · kind B2 · utility

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0References

6Claims

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Assignee

EWALD DÖRKEN AG · DE

Inventors

Melanie Müller · Oberlungwitz, DE
Marcel Roth · Goldkronach, DE
Ingo Klüppel · Bochum, DE

Key dates

Filing date	Dec 22, 2015
Grant date	Oct 6, 2020
Priority date	—
Expiry date	Feb 2, 2037

Classification

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

Abstract

The invention relates to a method for producing a silane-modified silicate. In order to obtain optimal corrosion protection properties, a silane compound according to the invention is at least partially hydrolyzed and/or condensed in the presence of a silicate compound at a pH value greater than or equal to 8 and then a pH value less than or equal to 7 is set by adding acid. The invention further relates to an aqueous acidic passivation composition for metal substrate coated with the passivation composition.

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