Titanium dioxide coated micaceous iron oxide pigments and method for producing the same
US5002608A · kind A · utility
8Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1990 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Feb 26, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09C2220/106
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The weatherability and lightfastness of TiO.sub.2 coated micaceous iron oxide (MIO) pigment may be improved by transforming the TiO.sub.2 present in the coating layer to rutile TiO.sub.2. Further improvement in the weatherability and lightfastness may be achieved by coating the pigment with an oxide of Cr, V, Mo, Al or a mixture thereof and/or a hydrous oxide of Cr or V, or a combination of two or more hydrous oxides of Cr, V, Al and Si.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.