Patent ID: 6117368
Filing Date: 2000-09-12
Classification: C08F,G02F

Abstract:
A process for forming an electrophoretic fluid for use in an electrophoretic display, comprising:admixing a first monomer and a crosslinker in a dispersion medium; said dispersion medium being a polar solvent selected from the group consisting of alcohols, ethers, halogenated hydrocarbons, ketones and esters;adding an initiator and a stabilizer to said dispersion medium so that said first monomer polymerizes to form dielectric polymer particles;introducing a second monomer and a functional monomer to said dispersion medium, said second monomer and said functional monomer at least partially polymerizing and grafting upon said dielectric polymer particles to provide said particles with a surface functionality that is suitable for charging in an electrophoretic display;separating said dielectric polymer particles from said dispersion medium; anddispersing said dielectric particles in a dielectric non-polar solvent, said dielectric non-polar solvent being different from said dispersion medium.