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US 2014/0209829 A1Published application
Coloured polymer particles
AssigneeMerck Patent GmbH
InventorsLouise Diane Farrand, Jonathan Henry Wilson, Emily Jane Thomas, Ashley Nathan Smith
Life of this patent
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Abstract
This invention relates to coloured polymer particles prepared by a reverse emulsion solvent removal process, electrophoretic fluids comprising such particles, and electrophoretic display devices comprising such fluids.
Claims20
1-15. (canceled)
A process for the preparation of coloured or black polymer particles for use in electrophoretic devices, said process comprising
- a) forming a reverse emulsion comprising at least one polymer, at least one coloured or black inorganic pigment, at least one polar solvent, at least one non-polar solvent, and at least one optionally charged surfactant,
- b) removing the polar solvent or polar solvents by evaporative methods
- c) optionally removing the non-polar solvent or non-polar solvents.
Dependencies are inferred from the claim text.