Patent ID: 6365314
Filing Date: 2002-04-02
Classification: G03G

Abstract:
A toner for developing electrostatic images, comprising:(a) a binder resin, (b) a long-chain alkyl compound having an acid value of 5-120 mgKOH/g present in amounts from 0.5-20 wt. parts per 100 wt. parts of the binder resin and represented by the following formula (3) CH3&Parenopenst;CH2&Parenclosest;yCH2COOHâ€ƒâ€ƒ(3), wherein y denotes an average value in the range of 35-150; and(c) an azo iron complex compound present in amounts from 0.1 to 10 wt parts per 100 wt. parts of the binder resin and represented by the following formula (4): wherein X1 and X2 independently denote hydrogen atom, lower alkyl group, lower alkoxy group, nitro group or halogen atom; m and mâ€² denote an integer of 1-3; R1 and R3 independently denote hydrogen atom, C1-18 alkyl or alkenyl, sulfonamide, mesyl, sulfonic acid group, carboxy ester group, hydroxy, C1-18 alkoxy, acetylamino, benzoylamino or halogen atom; n and nâ€² denote an integer of 1-3; R2 and R4 hydrogen atom or nitro group; and A+ denotes a cation including 75-98 mol. % of ammonium ion and another ion selected from the group consisting of hydrogen ion, sodium ion, potassium ion and mixtures thereof.