Branched polyol additives for electrophoretic media
US9765015B2 · kind B2 · utility
8Cited by
30References
26Claims
0Family size
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Key dates
| Filing date | Jan 11, 2017 |
| Grant date | Sep 19, 2017 |
| Priority date | — |
| Expiry date | Jan 11, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2001/1678
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Additives for electrophoretic media comprising esters of branched polyols and fatty acids, such as esters of pentaerythritol propoxylate (5/4 PO/OH) and stearic acid. The fatty acids may be saturated or unsaturated, branched or unbranched. In some embodiments, the fatty acids are perfluorinated, or partially fluorinated. In some embodiments, the branched polyol will include oligomers of polypropylene oxide or polyethylene oxide. When the additives are included in an electrophoretic medium in a display, the resulting display has an improved contrast ratio and reducing ghosting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.