Pigment with enhanced durability and plastic materials made therewith
US11891525B2 · kind B2 · utility
0Cited by
9References
17Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 15, 2020 |
| Grant date | Feb 6, 2024 |
| Priority date | — |
| Expiry date | Jul 2, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2003/2241
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention provides a method for enhancing the durability of a titanium dioxide material, the method including mixing citric acid and an alumina source with an aqueous slurry of titanium dioxide particles and water to form a mixture, the mixture having an acidic pH; and raising the pH of the mixture to a pH of no more than about 7.5 to form alumina-coated titanium dioxide particles. The invention also provides a pigmented plastic article including alumina-coated titanium dioxide particles prepared according to the invention dispersed in a polymer material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.