Method for treating surfaces of aluminum containing substrates
US12312693B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 5, 2019 |
| Grant date | May 27, 2025 |
| Priority date | — |
| Expiry date | Feb 27, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2003/2244
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Described herein is a method for treatment of at least one surface of a substrate at least partially made of aluminum and/or an aluminum alloy, including at least a step of contacting the surface with an acidic aqueous composition (A) including one or more metal compounds (M) selected from the group of titanium compounds, zirconium compounds, and hafnium compounds and one or more linear polymers (P) containing (m1) hydroxyethyl- and/or hydroxypropyl-(meth)acrylate, (m2) vinylphosphonic acid, and (m3) (meth)acrylic acid in form of their polymerized monomeric units, the one or more linear polymers (P) being included in the acidic aqueous composition (A) in an amount of 50 to 5000 ppm. Also described herein is an acidic aqueous composition (A), a master batch to produce the acidic aqueous composition (A), a method of using the acidic aqueous composition (A) for treating surfaces, and substrates comprising the treated surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.