Treatment of conversion-coated metal substrates with preformed reaction products of catechol compounds and functionalized co-reactant compounds
US11891534B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Jun 11, 2019 |
| Grant date | Feb 6, 2024 |
| Priority date | — |
| Expiry date | Nov 9, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F11/04
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The corrosion resistance of conversion-coated metal substrate surfaces is further enhanced by treating such surfaces with aqueous mixtures of preformed reaction products obtained by reacting catechol compounds, such as dopamine or a dopamine salt, and functionalized co-reactant compounds, such as a polyethyleneimine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.