| 摘要 |
A liquid developer for electrostatic photography, said liquid developer comprising resin particles dispersed in a non-aqueous solvent having a volume resistivity of at least 109 OMEGA cm, said dispersed resin particles being obtained by polymerizing (a) at least one member of methyl methacrylate and ethyl methacrylate soluble in said non-aqueous solvent and (b) at least one member selected from the group consisting of acrylic esters and methacrylic esters having an alkyl group having not more than 4 carbon atoms, said esters being soluble in said non-aqueous solvent, but being made insoluble by polymerization, said components (a) and (b) being polymerized in the presence of a dispersion stabilizing resin which is soluble in said non-aqueous solvent, and said dispersion stabilizing resin comprising a graft copolymer formed by polymerizing (i) at least one member of macromonomers (M) having a weight-average molecular weight of 1x103 to 4x104, said macromonomers (M) having a polymerizable double bond containing group represented by the formula (I) defined in the specification bonded to one terminal of the main polymer chain, said macromonomers (M) containing at least one member of polymer components represented by formula (II) defined in the specification in the main chain thereof, and (ii) at least one member of monomers represented by formula (III) as defined in the specification, said monomers (a) and (b) being made insoluble by polymerization.
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