Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1990-01-18
1991-12-17
Goodrow, John
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
050734709
ABSTRACT:
A liquid developer for electrostatic photography comprising resin grains dispersed in a non-aqueous solvent having an electric resistance of at least 10.sup.9 cm and a dielectric constant of not higher than 3.5 is disclosed. The dispersed resin grains contained therein are grains of a copolymer obtained by polymerizing a solution containing at least one monofunctional monomer (A) which is soluble in the aforesaid non-aqueous solvent but becomes insoluble after being polymerized and at least one monfunctional macromonomer (M) having a number average molecular weight of not more than 1.times.10.sup.4 and having a polymerizable double bond group represented by formula (M-II) bonded to only one terminal of a polymer main chain composed of a recurring unit represented by formula (M-I) in the presence of a dispersion stabilizing resin which is a polymer having at least a recurring unit represented by formula (I), a part of which has been crosslinked, and has a polymerizable double bond group copolymerizable with the monofunctional monomer (A) bonded to only one terminal of at least one polymer main chain thereof, the dispersion stabilizing resin being soluble in the non-aqueous solvent.
The liquid developer is excellent in redispersibility, storability, stability, image-reproducibility and fixability.
REFERENCES:
patent: 4837102 (1989-06-01), Dan et al.
patent: 4840865 (1989-06-01), Kato et al.
patent: 4983486 (1991-01-01), Kato et al.
patent: 5006441 (1991-04-01), Kato
Hattori Hideyuki
Kato Eiichi
Fuji Photo Film Co. , Ltd.
Goodrow John
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