Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Process of making developer composition
Patent
1980-05-20
1982-11-23
Welsh, John D.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Process of making developer composition
430114, 430 11S, G03G 912
Patent
active
043605800
ABSTRACT:
A liquid developer for use in electrostatic photography is prepared by blending in a carrier liquid having a high electric resistivity and a low dielectric constant, (1) a resin dispersion composition A comprising a polymer obtained from at least one kind of resin which is difficult to dissolve or insoluble in said carrier liquid and at least one kind of monomer in which said resin is soluble and (2) a coloring agent having a high electric resistivity and consisting essentially of fine particles of pigment coated with a resin B which is different from said resin-dispersion composition A and is substantially insoluble in said carrier liquid. The liquid developer is superior in dispersion stability, polarity controlling property, adhesive property and storage stability and contributes to effecting development manifesting improved fixability as well as transferability.
REFERENCES:
patent: 3909433 (1975-09-01), Gilliams et al.
patent: 3991226 (1976-11-01), Kosel
Kurotori Tsuneo
Matsubayashi Kenichi
Tsubuko Kazuo
Ricoh Co. Ltd.
Welsh John D.
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