| 摘要 |
<p>PURPOSE:To obtain a UV- curing type composition containing a microcapsule, a specific ethylenic unsaturated compound and a photopolymerization initiator as basic components and capable of providing excellent color developing property when used for offset printing. CONSTITUTION:The objective composition obtained by blending (A) microcapsule obtained by subjecting an electron-donating color Producing agent such as diphenylmethane based dye, thiazine based dye or infrared ray developing dye to encapsulization in a state dissolved in oil such as paraffin or triarylmethane with (B) a compound [e.g. 2-phenoxyethyl (meth)acrylate]expressed by the formula [W is H or methyl, X and Y are H or either one of X and Y is H and the other is methyl; Z is (substituted)aryl; (n) is >=1] of 15-85wt.% (as solid content) based on total capsule ink composition and (C) photopolymerization initiator such as benzoquinone or fluorenone of 1-20 pts.wt. based on 100 pts.wt. component B and sensitizer, resin, etc., as other components.</p> |
