| 摘要 |
PURPOSE:To enhance image sharpness, durability against successive copying, etc., by using a specified 2:1 type metal complex salt compd. as an electrostatic charge controller and also as a colorant. CONSTITUTION:An objective electrophotographic toner is obtained by successively carrying out melting, mixing, solidifying, and pulverizing of a binder resin and, as a charge controller and also as a colorant, a 2:1 metal complex salt compd. represented by formula I in which R1 is H, 1-4C alkyl, or the like; R2 is halogen; R3 is H, 1-10C alkyl, or the like; R4 is H, 1-4C alkyl, or the like; M is Cr or Co; m is 1-4; and X<-> is an anion. The compd. of formula I is obtained by diazotizing a compd. of formula II, coupling it with a compd. of formula III, and treating the obtained compd. of formula IV (Y<-> is an anion) with a Cr or Co donor in water or an org. solvent. |
