Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1989-03-20
1991-10-08
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
050553690
ABSTRACT:
A liquid developer for electrostatic photography is disclosed. The liquid developer comprises a resin dispersed as grains in a non-aqueous solvent having an electrical resistance of 10.sup.9 .OMEGA.cm or more and a dielectric constant of 3.5 or less, which is characterized in that the dispersed resin grains are copolymer resin grains obtained by polymerizing a solution containing at least one monofunctional monomer (A) which is soluble in the non-aqueous solvent but becomes insoluble therein after polymerization and at least one monofunctional macromonomer (B) which is composed of a polymer moiety having a repeating unit of the following formula (I) and a copolymerizable double bond-containing group of the following formula (II) bonded to only one terminal of the main chain of the polymer moiety and which has a number average molecular weight of 1.times.10.sup.4 or less, in the presence of a resin which is soluble in the non-aqueous solvent and which contains no graft group capable of polymerizing with the monomers; ##STR1## In formula (I), X represents --COO--, --OCO--, --CH.sub.2 OCO--, --CH.sub.2 COO--, --O--, --SO.sub.2 --, ##STR2## R.sub.1 represents a hydrogen atom or a hydrocarbon group having from 1 to 18 carbon atoms;
REFERENCES:
patent: 4837102 (1989-06-01), Dan et al.
patent: 4840865 (1989-06-01), Kato
patent: 4842975 (1989-06-01), Kato
Patent Abstracts of Japan, vol. 10, No. 38, Feb. 14, 1986.
Ishibashi Hiroshi
Ishii Kazuo
Kato Eiichi
Fuji Photo Film Co. , Ltd.
Goodrow John
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