Liquid developer

Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...

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430137, G03G 912

Patent

active

047627646

ABSTRACT:
A stable colored liquid developer comprising an insulating organic liquid dispersion medium having dispersed therein negatively charged marking particles comprising a thermoplastic resin core substantially insoluble in the dispersion medium, an amphipathic copolymeric steric stabilizer irreversibly anchored to the thermoplastic resin core, the steric stabilizer being soluble in the dispersion medium, a colored dye imbibed in the thermoplastic resin core, the dye being soluble in the thermoplastic resin core and insoluble in the dispersion medium and a charge control agent selected from the group consisting of a polybutene succinimide, lecithin, basic barium petroleum sulfonates, and mixtures thereof. This liquid developer may be employed to develop electrostatic latent images either on dielectric paper or on an electroreceptor or photoreceptor substrate and the resulting toner image may be transferred to another surface by tape transfer.

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patent: 3623986 (1971-11-01), Nachida
patent: 3890240 (1975-06-01), Hockberg
patent: 3900412 (1975-08-01), Kosel
patent: 4374918 (1983-02-01), Veillette et al.
patent: 4473629 (1984-09-01), Herrmann
patent: 4476210 (1984-10-01), Croucher
patent: 4681831 (1987-07-01), Larson et al.

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