Toners for use in electrophotography and production thereof

Details Toners for use in electrophotography and production thereof Toners for use in electrophotography and production thereof

1990-03-29

1994-07-12

Goodrow, John

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Process of making developer composition

430111, G03G 908

Patent

active

053287959

ABSTRACT:
There is disclosed a method of producing a toner particles for use in electrophotography which comprises: suspending a radical polymerizable monomer which contains a colorant and a charge controlling agent therein in an aqueous phase; suspension polymerizing the monomer to provide spherical polymer particles of 1-30 .mu.m in diameter; treating the suspension containing the polymer particles with a continuous, wet type, agitation mill, to deform the polymer particles.
A further method of producing toner particles is disclosed which comprises: producing spherical polymer particles by suspension polymerization of a monomer; making finely divided triboelectric or electroconductive particles or both onto the surface of the polymer particles; and then mechanically pressing the polymer particles to deform the polymer particles as well as to fix the particles on the surface of the polymer particles.
A still further method of producing toner particles is disclosed which comprises: producing spherical polymer particles of 20-300 .mu.m in diameter by suspension polymerization of a monomer; and then crushing and classifying the polymer particles into toners of 1-30 .mu.m in size preferably after deforming the polymer particles.

REFERENCES:
patent: 2965573 (1960-12-01), Gondlach
patent: 4171274 (1979-10-01), Schwarz
patent: 4472490 (1984-09-01), Yubakami et al.

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