Preparation of liquid toners containing charge directors and com

Details Preparation of liquid toners containing charge directors and com Preparation of liquid toners containing charge directors and com

1998-05-05

1999-08-10

Rodee, Christopher D.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Post imaging process, finishing, or perfecting composition...

430117, G03G 1310

Patent

active

059357541

ABSTRACT:
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. C.sub.12 to C.sub.18 saturated aliphatic carboxylic acids, C.sub.4 to C.sub.18 ethylenically unsaturated aliphatic carboxylic acids, C.sub.7 to C.sub.13 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.

REFERENCES:
patent: 3507679 (1970-04-01), Metcalfe et al.
Diamond, Arthur S. Handbook of Imaging Materials. New York: Marcel-Dekker, Inc. pp. 227-231, 1991.

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