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US 5,716,751 AGranted
Toner particle comminution and surface treatment processes
AssigneeXerox Corporation
InventorsJacques C. Bertrand, Steven D. Booth, K. Derek Henderson, Daniel E. Juda, Samir Kumar, Dawn M. O'Loughlin, Lewis S. Smith, Zhilei Wang
Life of this patent
Estimating the term…
Abstract
A process for preparing toner compositions comprising: coinjecting into a continuously operating fluid energy mill, feed toner particles, and a liquid component; and separating the resulting comminuted toner particles.
Claims17
A process for preparing toner compositions comprising:
- coinjecting into a continuously operating fluid energy mill feed toner particles comprising a mixture of a resin and a colorant, and a liquid component selected from the group consisting of water, resin insoluble organic liquids, and mixtures thereof;
- and separating the resulting comminuted toner particles, wherein the liquid component prior to coinjection contains a soluble additive, insoluble additive, or mixtures thereof, wherein the soluble additive is selected from the group consisting of charge control additives, polymers, dyes, pigments, fragrances, lubricants, waxes, conductivity control agents, humidity sensitive control agents, and mixtures thereof, and wherein the insoluble additive is selected from the group consisting of metal oxides, surface treated metal oxides, charge control additives, pigments, dyes, latex polymer particles, lubricants, waxes, conductivity control agents, humidity sensitive control agents, and mixtures thereof.
A process for preparing a toner composition comprising:
- continuously coinjecting a mixture of feed toner particles comprising a mixture of a resin and a colorant, and water into a fluid energy mill, wherein the feed particles and the water are in a weight ratio of about 80:20 to about 99:1, and wherein the resulting comminuted toner particles have an number average diameter particle size of from about 5 to about 10 microns and wherein the water prior to coinjection into the fluid energy mill contains an additive selected from the group consisting of a fluorinated surfactant, metal oxides, surface treated metal oxides, charge control additives, pigments, dyes, latex polymer particles, lubricants, waxes, conductivity control agents, humidity sensitivity control agents, and mixtures thereof.
Dependencies are inferred from the claim text.