Additive compound for uniform dyeing after anodic oxidation, additive solution having the additive compound, and dyeing method
US12227864B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Jun 2, 2022 |
| Grant date | Feb 18, 2025 |
| Priority date | — |
| Expiry date | Oct 8, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D11/16
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An additive compound for dyeing an aluminum or aluminum alloy substrate after anodic oxidation to provide better uniformity in dyeing and hence a better finished appearance includes a main agent, an auxiliary agent, a pH stabilizer, and an antibacterial agent. The antibacterial agent includes at least one of sorbic acid, fluconazole, itraconazole, Artemisia argyi, benzyl alcohol, benzoic acid, salicylic acid, and boric acid. An additive solution and a dyeing method are also provided, the use of the compound also allows for a more rapid dyeing process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.