Coloring material composition
US6310118A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 18, 1999 |
| Grant date | Oct 30, 2001 |
| Priority date | — |
| Expiry date | Feb 18, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09C2220/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A colorant composition capable of giving a coating film excellent in heat resistance and weather resistance which not only can have a single clear color, such as, blue, green, yellow, or the like, and be used for forgery prevention based on discrimination by means other than visible light rays, but also does not suffer color fading even at a high temperature of 350.degree. C. to 600.degree. C. The colorant composition comprises at least a powder comprising a base particle coated with a multilayered film comprising layers differing from each other in refractive index to make the base particle have an interference color, wherein the powder is dispersed in a dispersion medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.