| 摘要 |
<p>PURPOSE:To obtain a UV-curing ink composition being sensitive to near-infrared rays and improved in storage stability and light resistance by mixing a UV- curing acrylate resin composition with a specified dithiol compound. CONSTITUTION:A UV-curing acrylate resin composition comprising an acrylate monomer or oligomer which cures with light of an emission wavelength of 190-480nm or a mixture thereof is mixed with 0.01-50wt.% dithiol compound of formula I or II [wherein A<1> to A<8> are each H, halogen, nitro, cyano, (thio) cyanato, acyl, carbamoyl or the like, provided that any two adjoining substituents may be combined with each other through a connecting group; B<1> to B<2> are each H, cyano, acyl, carbomyol or the like; R<1> to R<4> are each (un)substituted alkyl or (un)substituted aryl; and M is a bivalent metal atom, a tri- or tetravalent substituted metal atom or an oxy metal] and optionally 0.01-10.0wt.% photocuring initiator, 0.1-10wt.% UV absorber and 0.110wt.% singlet oxygen quencher to obtain the objective ink composition.</p> |
