Coated bismuth oxy halide-based pigment
US11168217B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2016 |
| Grant date | Nov 9, 2021 |
| Priority date | — |
| Expiry date | Apr 22, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09C2220/103
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention is directed to a coated bismuth oxy halide-based pigment having a coating comprising an anti-oxidant, said antioxidant is being a phenol based, a phosphite or phosphonate based, or a thioether based stabilizer, and the coating comprising an inner coating and an outer coating, wherein the outer coating comprises the antioxidant, and wherein the inner coating comprises a first layer consisting of one or more salts, or one or more oxides, heteropolyacids, organic acids, sulphites, sulfides, sulfates, phosphates, pyrophosphates, polyphosphates, hydrates, carbonates, or a combination thereof, selected from the group of alkali-earth metals, metals, non-metals, transition metals or lanthanides. Further, the present invention is directed to a composition comprising a paint, a lacquer, an ink, a cosmetic, a resin, a plastisol or a polymer formulation, and such pigment. In addition, the present invention is directed to a method for manufacturing a coated bismuth oxy halide-based pigment, said method comprising the steps of: —providing a dispersion of a bismuth oxy halide-based pigment, —adding a dispersion of an antioxidant, —mixing and drying.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.