| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject product excellent in re-dispersion property, preservation stability and printing resistance by dispersing specific resin particles in a non-aqueous carrier liquid. SOLUTION: This oily ink for an ink jet type plate making of a printing plate, is obtained by dispersion resin particles obtained by polymerizing and granulating a solution containing (A) a mono-functional monomer soluble to a non-aqueous solvent and becoming insoluble by its polymerization, (B) a monofunctional macromonomer in which a polymerizable double bond of formula II (V<1> is COO, phenylene, etc.; b<1> , b<2> are each a<1> ) bonds only to one side of the terminals of a polymer main chain consisting of a unit of formula I (V<0> is COO, OCO, etc.; a<1> , a<2> are each H, cyano, etc.; D<0> is an 8-22C hydrocarbon, etc.), and (C) a comb type copolymer having a monofunctional macromonomer bonded with a polymerizable double bond to the one side of terminal of the polymer main chain as a copolymeric component as a non-aqueous soluble dispersion stabilizing resin having a unit of formula III (V<2> is COO, O, etc.; d<1> , d<2> are each a<1> ; D<1> is a 10-32C alkyl or an alkenyl) in main chain and/or comb part thereof, and dispersing the resin particles in a non-aqueous carrier liquid having >=10<9> Ωcm electric resistance and <=3.5 dielectric constant. |
