| 摘要 |
The invention relates to a method for producing liquid toner compositions containing charge directors and in which the electrical properties of the charge directors are stabilized, which method comprises the steps of: (A) first making a homogeneous liquid composition which comprises (1) liquid hydrocarbon compatible with liquid toners for electrostatic imaging, (2) at least one charge director, and (3) at least one stabilizing component in an amount effective to stabilize the electrical properties of the at least one charge director, the stabilizing component being selected from solubilizable acids which include organic moieties (e.g. C12 to C18 saturated aliphatic carboxylic acids, C4 to C18 ethylenically unsaturated aliphatic carboxylic acids, C7 to C13 aromatic carboxylic acids, and partial alkyl esters of orthophosphoric acid containing 12 to 36 carbon atoms); and (B) mixing the homogeneous liquid composition from step (A) in any order with at least component (5) from the following components (5) and (6), namely, (5) pigmented thermoplastic resin particles, and (6) further liquid hydrocarbon as defined in (1), above, such that component (5) is micro-dispersed in the toner composition.
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