Method of making functionalized quinacridone pigments
US10662334B2 · kind B2 · utility
1Cited by
138References
8Claims
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Key dates
| Filing date | Jan 11, 2019 |
| Grant date | May 26, 2020 |
| Priority date | — |
| Expiry date | Jan 11, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2001/1678
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Quinacridone pigments that are surface-functionalized with glycidyl methacrylate, maleic anhydride, or 4-methacryloxyethyl trimellitic anhydride to create a functionalized pigment. The functional groups are then activated to bond hydrophobic polymers, thereby coating the pigment with the hydrophobic polymers. The quinacridone pigments can be used for a variety of applications. They are well-suited for use in electro-optic materials, such as electrophoretic media for use in electrophoretic displays.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.