| 摘要 |
<p>A photocurable composition comprising (A) 100 parts by weight of a compound having an ethylenically unsaturated group, (B) from 0.001 to 5 parts by weight of a cationic dye having an absorption maximum wavelength in the wavelength region of from 400 to 1,200 nm represented by formula (1): <MATH> wherein D<+> represents a cation having an absorption maximum wavelength in the wavelength region of from 400 to 1,200 nm, and A1<-> represents an anion, and (C) from 0.005 to 10 parts by weight of a quaternary borate-type compound represented by formula (2): <CHEM> wherein R1, R2, R3 and R4 each independently represents an alkyl group, an aryl group, an aralkyl group, an alkenyl group, an alkynyl group, a silyl group, a heterocyclic group or a halogen atom, and Z<+> represents a cation, wherein from 5 to 95 wt% of (A) the compound having an ethylenically unsaturated group is a urethane (meth)acrylate oligomer obtained by the reaction of a polyisocyanate having three or more isocyanate groups within one molecule with a hydroxyl group-containing (meth)acrylic acid ester.</p> |
