Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1998-01-20
2000-10-31
Jagannathan, Vasu
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
430 49, C09D 1102, C09D 1110, G03G 1326, G03G 1328
Patent
active
06140389&
ABSTRACT:
An oil-based ink for a printing plate by an ink jet process comprising spraying an oil-based ink comprising at least resin particles dispersed in a nonaqueous carrier liquid having an electric resistance of 10.sup.9 .OMEGA.cm or more and a dielectric constant of 3.5 or less on an image receiving layer of a lithographic printing plate precursor dropwise from a nozzle to form an image, and then desensitizing a non-image area of the image receiving layer by a chemical reaction to prepare a lithographic printing plate, the image receiving layer being formed on a water-resistant support and comprising zinc oxide and a binding resin; and a surface of the image receiving layer having a contact angle with water of 50.degree. or more, wherein the resin particles dispersed are copolymer resin particles obtained by polymerization granulation of a solution comprising (i) and (ii): (i) at least one monofunctional monomer (A) which is soluble in a nonaqueous solvent which is at least miscible with the nonaqueous carrier liquid and becomes insoluble in the nonaqueous solvent by polymerization; (ii) at least one resin for dispersion stabilization (P) whcih is soluble in the nonaqueous solvent and is a polymer comprising a repeating unit, wherein a part of the polymer is crosslinked and a polymerizable double bond group which is copolymerizable with the monomer (A) is combined with only one end of at least one main chain of the polymer, and a method for preparing a printing plate by an ink jet process using the ink.
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Leach, R.H. and Pierce, R.J.; The Printing Ink Manual, Blueprint, London (page 63), 1993.
Ishii Kazuo
Kato Eiichi
Osawa Sadao
Fuji Photo Film Co. , Ltd.
Jagannathan Vasu
Shosho Callie E.
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