| 摘要 |
PURPOSE:To obtain a developer superior in dispersibility, fixability, storage stability, etc., by dispersing colored particles consisting of a colorant and a polymer composed of a specified aminoalkyl styrene or its derivative as a component into a nonaq. solvent having specified resistance and dielectric constant. CONSTITUTION:A binder resin of a toner contains at least one of a homopolymer and a >=2 component copolymer of a monomer represented by formulaIin which X is formula II, III, or IV, n is 1-6, and R<1>, R<2> is alkyl, aryl optionally substd. by 1-12C alkyl, or aralkyl optionally substd. by 1-12C alkyl or 1-12C alkylene. A copolymer of this monomer and styrene, (meth)acrylate, or the like monomer other than it is mixed with a known pigment or dye to form a toner. This toner is dispersed into a nonaqueous solvent having >=10<9>ohm.cm resistivity and <=3 dielectric constant to obtain a liquid developer. This developer is superior in dispersibility of toner and its flexibility, and storage stability, and dows not cause coagulation, precipitation etc. of the toner. |
