Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1989-12-27
1991-04-09
Welsh, David
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430904, G03G 912
Patent
active
050064410
ABSTRACT:
A liquid developer for electrostatic photography comprising a resin dispersed in a non-aqueous solvent having an electric resistance of at least 10.sup.9 .OMEGA. cm and a dielectric constant of not higher than 3.5, wherein the dispersed resin is a copolymer resin obtained by polymerizing a solution containing at least one monofunctional monomer (A) which is soluble in the aforesaid non-aqueous solvent but becomes insoluble therein after being polymerized and at least one resin which is a polymer having at least a recurring unit represented by following formula (I), a part of the polymer being crosslinked, a polymerizable double bond group copolymerizable with said monomer (A) being bonded to one terminal only of at least one polymer main chain thereof, and said resin being soluble in the aforesaid non-aqueous solvent; ##STR1## wherein X.sup.1, R.sup.0, a.sup.1 and a.sup.2 are as defined in the specification.
The liquid developer is capable of forming an offset printing plate precursor having excellent ink-receptivity to printing ink and excellent printing durability.
REFERENCES:
patent: 4618557 (1986-10-01), Dan et al.
patent: 4665002 (1987-05-01), Dan et al.
patent: 4837102 (1989-06-01), Dan et al.
Fuji Photo Film Co. , Ltd.
Welsh David
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