| 摘要 |
PURPOSE:To obtain a toner stable, sharp, and uniform in triboelectrified amt., prevented from agglomeration and change of characteristics for a long term superior in fixability, etc., and capable of forming a chromatic color image high in density by incorporating a specified tetraazolium compd. in a binder. CONSTITUTION:The toner contains in a state mixed into a binder or attached to the outside, as the charge controller, a compd. represented by the formula in which each of R1-R3 is H, or one of substituents having base skeletons of hydrocarbons, such as alkyl, cycloalkyl, alkenyl, aryl, aralkyl, alkylene, and arylene groups, etc., or a group having a hetero ring contg. N, S, or O, or a combination of them; and X is BF4, PF6, B-(benzene ring)4, or p-benzene)6. This charge controller can keep clear the color of a colorant added to the added to the toner, and does not decompose the colorant, and it can form a superior toner improved in storage stability before use, and prevented from high temp. offset, etc. |
