| 摘要 |
Positively charged electrophotographic toners contain, in addition to conventional resin and pigment particles, an additive reinforcing the cationic charge, of the general formula <IMAGE> +TR <IMAGE> in which R1 and R2 each represent hydrogen, chlorine, bromine, hydroxyl, C1-C4-alkoxy or carboxyl, A represents C1-C5-alkylene or -C6H4-CH2- (m or p), m represents 0 or 1, n represents 1 or 2 K(+) represents <IMAGE> R3 represents C1-C18-alkyl, carbamoyl-C1-C2-alkyl, C1-C4-alkoxycarbonyl-C1-C2-alkyl, benzyl, cyclohexyl or allyl, R4 represents C1-C4-alkyl or a single bond linked to D, R5 represents C1-C4-alkyl, D represents -CH2, -CH2-CO-, -CH2-CO-NH- or W represents <IMAGE> -CO- or a single bond, Z represents -CH2-, <IMAGE> -O-, -S-, -SO2- or a single bond and An(-) represents an anion.
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