Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1992-11-10
1994-10-18
Martin, Roland
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430114, G03G 9135
Patent
active
053567480
ABSTRACT:
A positively chargeable liquid developer for electrostaticphotography comprising a non-aqueous solvent having a volume specific resistance of at least 10.sup.9 .OMEGA.cm and resin grains dispersed therein, wherein the resin grains contain a dispersion stabilizing resin which is dissolved or dispersed in a colloidal form in the non-aqueous solvent and which mainly comprises a graft copolymer composed of (1) at least one macromonomer (M) having a weight average molecular weight of from 1.times.10.sup.3 to 1.times.10.sup.5 obtained by bonding a terminal carboxyl group bonded to the main chain of a polymer containing at least one specific polymer component to an epoxy compound having at least one polymerizable double bond group, using a quaternary ammonium salt as a reaction catalyst, and (2) at least one specific monomer, which gives the definite chargeability, easily controls the charge amount, is excellent in dispersion stability and endures long-term use and storage.
REFERENCES:
patent: 5073471 (1991-12-01), Kato et al.
patent: 5085966 (1992-02-01), Suzuki et al.
patent: 5112718 (1992-05-01), Kato et al.
Horie Seiji
Sano Kenji
Suzuki Nobuo
Watarai Shu
Fuji Photo Film Co. , Ltd.
Martin Roland
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