Liquid developer for electrostatic photography

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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430115, 430904, G03G 913

Patent

active

051067161

ABSTRACT:
A liquid developer for electrostatic photography is disclosed. The liquid developer of this invention comprises resin grains dispersed in a non-aqueous solvent having an electric resistance of at least 10.sup.9 .OMEGA.cm and a dielectric constant of not higher than 3.5, wherein the dispersed resin grains are copolymer resin grains obtained by polymerizing a solution containing at least one mono-functional monomer (A) which is soluble in the above non-aqueous solvent but becomes insoluble in the non-aqueous solvent by being polymerized, in the presence a dispersion-stabilizing resin, which is soluble in the non-aqueous solvent and is composed of at least one recurring unit represented by the formulae (Ia) and (Ib) having a weight average molecular weight of from 1.times.10.sup.3 to 2.times.10.sup.4 as defined in the specification.
The liquid developer according to the present invention is excellent in redispersibility, storability, stability, image-reproducibility and fixability.

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patent: 4665002 (1987-05-01), Dan et al.
patent: 4837102 (1989-06-01), Dan et al.
patent: 4973539 (1990-11-01), Sacripante et al.
patent: 5006441 (1991-04-01), Kato

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