| 摘要 |
PURPOSE:To enhance storage stability and durability of an electrostatic photographic liquid developer, prepared dispersing a toner consisting mainly of a colorant and a resin into a carrier liquid, by using a resin having a functional group and high adsorptivity. CONSTITUTION:A monomer, having general formulaIin which R1 is H or methyl and n is 8-20 e.g., 2-ethylhexyl acrylate, is polymerized in presence of a polymerization initiator in a carrier soln., e.g. aliphatic hydrocarbon solvent, successively a monomer represented by formula II[in which R2 is formula III, formula IV (m being 2, 3, or 4), formula V (h being 1, 2, 3, or 4), formula VI and formula VII], e.g., hydroxyethyl acrylate, is polymerized, and the obtained colloidal polymer is used. One pt.wt. of this polymer resins (A), 0.1-10pts.wt. colorant, e.g, alkali blue or carbon black (B), and a carrier (C) are kneaded and the obtained concd. toner is diluted with a prescribed amt. of carrier liquid to obtain a liquid developer. |
