Alkaline-earth metal-, copper- and optionally titanium-based silicates, blue or violet pigments based on these silicates, process for their preparation and their use
US5888291A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1996 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | Nov 7, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/60
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Alkaline-earth metal- and copper- and optionally titanium-based silicates in the form of agglomerates consisting either of monocrystalline grains or of aggregates themselves consisting of monocrystalline particles. These silicates are prepared by a process including the following stages: a silica sol or a silicate and optionally a titanium sol is mixed with salts of the other constituent elements of the silicate with the exception of oxygen; the mixture thus obtained is dried, preferably by spraying, and the product obtained is calcined. The silicates may be employed as colored pigments in plastics, paints, varnishes, rubbers, ceramics, glazes, papers, inks, cosmetic products, dyes and laminated coatings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.