Bismuth oxychloride nacreous pigment having improved weather fastness and the production thereof
US5149369A · kind A · utility
12Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1992 |
| Grant date | Sep 22, 1992 |
| Priority date | — |
| Expiry date | Jan 6, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09C2220/103
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Bismuth oxychloride nacreous pigment coated with a rare earth metal compound is described. The coated pigment is prepared by adding a rare earth metal salt solution to a suspension of bismuth oxychloride pigment crystals to form a further suspension containing the pigment crystals and cerium hydroxide. The cerium hydroxide is then precipitated out of the further suspension to coat the pigment crystals. The coated pigment is endowed with improved weather fastness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.