Method for manufacturing bismuth based pigment having an improved alkaline resistance by encapsulating said pigment with a chelating agent
US11098199B2 · kind B2 · utility
0Cited by
9References
18Claims
0Family size
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Key dates
| Filing date | Sep 22, 2017 |
| Grant date | Aug 24, 2021 |
| Priority date | — |
| Expiry date | Jan 25, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/90
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention is directed to a method for manufacturing a bismuth based pigment having an improved alkaline resistance, the method comprising: i) obtaining a dried bismuth based pigment; ii) encapsulation of the bismuth based pigment using a chelating agent; iii) final processing of the encapsulated pigment; and v) drying of the pigment. In addition, the present invention is directed to a bismuth based pigment encapsulated by a layer of chelating agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.