| 摘要 |
Particularly advantageous electrophotographic toners contain, besides customary resin and pigment particles, an additive which increases the negative charge, of the general formulae <IMAGE> in which one of the radicals R<1> and R<2> represents hydrogen and the other of these radicals represents hydrogen, C1-C22-alkyl, allyl, cyclohexyl, phenyl-C1-C2-alkyl or phenyl, An<6> denotes an anion, the ring A and/or the radicals R<1> or R<2> can be substituted and the hydrogen atom on the bracket in formula (II) is bonded to a nitrogen atom, and/or a tautomeric compound corresponding to these formulae (I) and/or (II). |
