Electrophoretic particles and processes for the production thereof
US6822782B2 · kind B2 · utility
354Cited by
152References
104Claims
0Family size
Assignee
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Key dates
| Filing date | May 15, 2002 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | Jul 12, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2001/1678
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
In electrophoretic media, it is advantageous to use pigment particles having about 1 to 15 percent by weight of a polymer chemically bonded to, or cross-linked around, the pigment particles. The polymer desirably has a branched chain structure with side chains extending from a main chain. Charged or chargeable groups can be incorporated into the polymer or can be bonded to the particles separately from the polymer. The polymer-coated particles can be prepared by first attaching a polymerizable or polymerization-initiating group to the particle and then reacting the particle with one or more polymerizable monomers or oligomers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.