Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Process of making developer composition
Patent
1987-12-22
1989-06-27
Welsh, J. David
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Process of making developer composition
430114, G03G 912
Patent
active
048429759
ABSTRACT:
A liquid developer for electrostatic photography is described, comprising at least a resin dispersed in a non-aqueous solvent having an electric resistance of at least 10.sup.9 ohms.cm and a dielectric constant of not more than 3.5. The resin is a copolymer resin obtained by polymerizing a solution containing at least one monofunctional monomer (A) which is soluble in the non-aqueous solvent but becomes insoluble upon polymerization and at least one specified monomer (B) containing an aliphatic group having at least 8 carbon atoms and being copolymerizable with the monomer (A), in the presense of a resin not containing a grafting group polymerizable with the monomers and being soluble in the non-aqueous solvent. The resin may be colored by dissolving at least one organic dye in the dispersion of the resin and heating the mixture. The developer has excellent dispersion stability, redispersibility, fixability and preservability.
REFERENCES:
patent: 3417019 (1968-12-01), Beyer
patent: 3849165 (1974-11-01), Stahly et al.
patent: 3883440 (1975-05-01), Tamai et al.
patent: 3900412 (1975-08-01), Kosel
Dan Shigeyuki
Ishibashi Hiroshi
Ishii Kazuo
Kato Eiichi
Sera Hidefumi
Fuji Photo Film Co. , Ltd.
Welsh J. David
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