Compositions and methods for forming coatings of selected color on a substrate and articles produced thereby
US6649214B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1999 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Mar 17, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2217/23
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A copper containing component and a manganese containing component are applied onto the surface of a substrate to form a coating having a selected ratio of copper to manganese to form a desired color. For a brown color, the film molar ratio of copper to manganese is above 1; for an amber color, the molar ratio is below 1, and for a blue color the film molar ratio is about 1. Further, color shifting of a multi-component coating upon subsequent heat treatment is minimized or prevented by determining the most mobile species in the coating and then placing a concentration gradient layer of an oxide of that mobile species between the substrate and the coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.