Pigment and process for producing the same
US5238492A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 1, 1991 |
| Grant date | Aug 24, 1993 |
| Priority date | — |
| Expiry date | Nov 1, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K9/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed are a pigment, a production process therefor, a production process therefor and for improving its weather resistance, and a metallic paint made therefrom. The pigment includes a transparent or semi-transparent scaly substrate, a TiO.sub.2 layer coated on an entire surface of the substrate, light absorbing portions formed on a surface of the TiO.sub.2 layer in a scattering manner and including low order oxides of titanium, and glossy portions formed on a surface of the TiO.sub.2 layer in a scattering manner and having a metallic glossy effect. The pigment produces a metallic glossy effect resulting from the glossy portions, strong interference colors resulting from the TiO.sub.2 layer and substance colors resulting from the light absorbing portions, and it exhibits a great covering power. Such an excellent pigment can be obtained by the production process in which sputtering is carried out onto a conventional pearl mica pigment, and its weather resistance can be improved by the production process in which chromium (III) hydroxide is repeatedly coated on a conventional pearl mica pigment before and after the sputtering. When the metallic paint is made from the pigment, it n…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.