Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1986-12-29
1989-06-20
Goodrow, John L.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430115, G03G 912
Patent
active
048408654
ABSTRACT:
A liquid developer for electrostatic photography is disclosed, comprising a non-aqueous solvent having electrical resistivity of not less than 10.sup.9 .OMEGA..cm and a dielectric constant of not more than 3.5 having dispersed therein at least a resin, wherein said resin is a copolymer resin obtained by subjecting a solution containing (A) at least one of monofunctional monomer which is soluble in said solvent but insolubilized upon polymerization and (B) at least one of monomers having at least two polar groups and/or polar linking groups represented by formula (I): ##STR1## wherein V, Y, R.sub.1, R.sub.2, X.sub.1, X.sub.2, a.sub.1, and a.sub.2 are defined in the specification, to a polymerization reaction in the presence of a resin which is soluble in said solvent and contains no graft group polymerizable with said monomers. The developer is excellent in dispersion stability, redispersibility and fixing properties and is capable of producing a master plate for offset printing having excellent ink sensitivity and printing durability.
REFERENCES:
patent: 3883440 (1985-05-01), Tamai et al.
patent: 4081391 (1978-03-01), Tsubuko et al.
patent: 4156034 (1979-05-01), Mukoh et al.
patent: 4388395 (1983-06-01), Tsubuko et al.
patent: 4618557 (1986-10-01), Dan et al.
Dan Shigeyuki
Ishibashi Hiroshi
Ishii Kazuo
Kato Eiichi
Sera Hidefuji
Fuji Photo Film Co. , Ltd.
Goodrow John L.
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