Inorganic rare earth pigments/colorants and synthesis/applications thereof
US6284033A · kind A · utility
2Cited by
6References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1996 |
| Grant date | Sep 4, 2001 |
| Priority date | — |
| Expiry date | Feb 12, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/64
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Thermally/chemically stable and nontoxic inorganic pigments/colorants, characteristically green and well suited for the coloration of a wide variety of materials and substrates, for example, plastics, ceramics, etc., comprise at least one mixed oxide of the formula: EQU R.sub.2 M.sub.x M'.sub.y O.sub.5 in which R is at least one element selected from among yttrium and a rare earth having an atomic number ranging from 62 to 71, inclusive, M and M', which may be identical or different, are each at least one metallic element exhibiting at least one valence state of +2, and x and y are numbers, the sum x+y of which is equal to 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.