Liquid developer for developing electrostatic charge images and

Details Liquid developer for developing electrostatic charge images and Liquid developer for developing electrostatic charge images and

1983-12-16

1985-07-02

Martin, Roland E.

Radiation imagery chemistry: process, composition, or product th

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

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

430137, G03G 912

Patent

active

045268525

ABSTRACT:
The invention relates to a liquid developer with negatively charged toner particles for developing electrostatic charge images. It is composed of a carrier liquid of high electric resistivity and low dielectric constant, pigments or dyes, a binder, a dispersing agent and a charge control agent, such as an N-vinylpyrrolidone-containing polymer, a waxy substance and conventional additives. The liquid developer additionally contains at least one wax which is readily soluble in the carrier liquid at increasing temperatures, but difficultly soluble at room temperature, which reduces the specific electric conductivity of the liquid developer and which has a softening point within a range of from about 50.degree. to 120.degree. C. and an acid number of from about 0 to 200.

REFERENCES:
patent: 3542682 (1970-11-01), Mutaffis
patent: 3992342 (1976-11-01), Tsubuko et al.
patent: 4081391 (1978-03-01), Tsubuko et al.
patent: 4243736 (1981-01-01), Herrmann
patent: 4250241 (1981-02-01), Tsubuko et al.
patent: 4306009 (1981-12-01), Veillette et al.
patent: 4357406 (1982-11-01), Kouchi et al.
patent: 4374918 (1983-02-01), Veilette et al.
CRC Handbook of Chemistry and Physics--1982-1983; 63rd Edition Robert C. Weast, Ph.D.

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