Use of preformed reaction products of catechol compounds and functionalized co-reactant compounds to reduce oxidation of bare metal surfaces
US12227668B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2019 |
| Grant date | Feb 18, 2025 |
| Priority date | — |
| Expiry date | Jun 11, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F11/04
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The tendency of a bare metal surface to oxidize (e.g., flash-rust) may be alleviated by contacting the bare metal surface with an aqueous mixture of at least one preformed reaction product obtained by reaction of at least one catechol compound, such as dopamine or a salt thereof, with at least one co-reactant compound functionalized with one or more functional groups reactive with the at least one catechol compound, such as (meth)acryl, primary amino, secondary amino, thiol and/or hydroxyl groups, with polyethyleneimine being an example of a suitable co-reactant compound. Such a rinsing procedure does not interfere with subsequent conversion coating of the metal surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.