LIQUID DEVELOPER
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Issued Date -
Jan 12, 2017
app pub date -
Feb 4, 2015
filing date -
Feb 4, 2014
priority date (Note) -
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Abstract
A liquid developer for electrophotography or electrostatic recording includes colored resin particles, which are constituted by at least a pigment, a binder resin containing acid group-containing resin, a basic group-containing pigment dispersion agent, and a granulating aid, with the colored resin particles formed in an insulating solvent by utilizing the coacervation method. A carbodiimide compound having at least one carbodiimide group is used as the granulating aid, with the ratio of the number of active hydrogens in the acid group-containing resin to the number of carbodiimide groups in the carbodiimide compound adjusted to 1:0.01 or more but less than 1:1.00, and the colored resin particles are dispersed in the insulating solvent by a particle dispersion agent. The liquid developer has good uniformity, preservation stability, fixing property, and electrophoretic migration property of particles.
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