LIQUID DEVELOPER
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United States of America Patent
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app pub date -
Feb 4, 2015
filing date -
Feb 4, 2014
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Abstract
A liquid developer for electrophotography or electrostatic recording is obtained by dispersing, in an insulating solvent, colored resin particles obtained according to the coacervation method from at least a pigment, pigment dispersion agent and binder resin, wherein the insulating solvent has been mixed in such a way that aliphatic hydrocarbon solvent having 11 to 12 carbon atoms accounts for 8.0 to 20.0 percent by mass, and aliphatic hydrocarbon solvent having 17 to 30 carbon atoms accounts for 2.0 to 45.0 percent by mass, and a total of these aliphatic hydrocarbon solvents having 11 to 30 carbon atoms accounts for 99 percent by mass or more, relative to the total mass of insulating solvent, and also in such a way that the viscosity of the insulating solvent at 25° C. becomes 2.0 to 10.0 mPa·s.
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