BLACK POLYMER PARTICLES

摘要

This invention relates to a process for the preparation of a dispersion comprising black polymer particles, such black polymer particles prepared by the process, the use of the dispersion and the black polymer particles in electrophoretic fluids, and electrophoretic display devices comprising such fluids.

主权项

1. A process for the preparation of black polymer particles dispersed in at least one non-polar fluorinated solvent for use in electrophoretic devices, the process comprising the steps of
a) forming a reverse emulsion comprising at least one polymer, at least one carbon black pigment, at least one polar solvent, at least one non-polar, fluorinated solvent, and at least one surfactant, and b) removing the polar solvent or polar solvents by evaporative methods, wherein the non-polar, fluorinated solvent or solvents are not removed.