| 摘要 |
PURPOSE:To improve offset resistance and to widen the range of fixing temp. by incorporating a material prepd. by bringing a vinyl polymer having 3-50 acid value and >=7X10<3> average mol.wt. and metal compd. into reaction and a vinyl plymer having <=1 acid value and 1X10<3>-1X10<5> average mol.wt. into the titled toner. CONSTITUTION:This toner contains the material prepd. by bringing the vinyl polymer A having 3-50 acid value and >=7X10<3> weight average mol.wt. and the metal compd. into reaction and the vinyl polymer B having <=1 acid value and 1X10<3>1X10<5> weight average mo.wt. The vinyl polymer A refers to a polymer prepd. by copolymerizing 1 kinds of vinyl monomers and unsatd. acids and the vinyl polymer B refers to a polymer prepd. by polymerizing one kind of >=2 kinds of vinyl monomers. The polymer A is brought into reaction with the metal compd.; i.e., is crosslinked in the above-mentioned manner, by which the flocculating power is improved to a greater extent and the offset generating temp. is increased. The polymer B which does not contribute to the reaction is incorporated into the toner, by which the degradation in the maintenance of the fixing temp. and in pulverization characteristic is prevented. |
