Patent · US Active

Passivation composition comprising a silane-modified silicate compound

US11759820B2 · kind B2 · utility

0Cited by

1References

13Claims

0Family size

Assignee

EWALD DÖRKEN AG · DE

Inventors

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

Key dates

Filing date	May 19, 2020
Grant date	Sep 19, 2023
Priority date	—
Expiry date	May 25, 2041

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.