| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide oily ink for electrostatic inkjet platemaking, good in jet stability, clear printed image formation and printed image intensity, and capable of giving printing plates enabling printing many sheets of printed matter with clear printed images. <P>SOLUTION: The oily ink for electrostatic inkjet platemaking essentially contains copolymer resin particles obtained by subjecting a solution containing the components (A) to (P) described below to polymerization granulation in a non-aqueous vehicle liquid ≥10<SP>9</SP>Ωcm in electrical resistance and ≤3.5 in dielectric constant. The component (A) is a monofunctional monomer soluble in a non-aqueous solvent and becoming insoluble when polymerized. The component (B) is a monofunctional monomer having in the molecule each at least one amino group and acidic group selected from -PO<SB>3</SB>H<SB>2</SB>group and -SO<SB>3</SB>H group and copolymerizable with the monomer (A). The component (C) is a monofunctional monomer having a substituent containing fluorine atom and/or silicon atom and copolymerizable with the monomer (A). The component (P) is a polymer containing a specific component, wherein part of the main chain thereof is crosslinked, being a dispersion-stabilizing resin soluble in the above-mentioned non-aqueous solvent. <P>COPYRIGHT: (C)2004,JPO |
