| 摘要 |
A photopolymerizable composition comprising an addition-polymerizable compound having at least one ethylenically unsaturated double bond and a photopolymerization initiator, characterized in that the initiator comprises (a) a compound of the formula: <IMAGE> (I) wherein R1 and R2 are alkyl group, n is 1, 2 or 3 and ring A is an aromatic ring containing nitrogen atom, and (b) hexaarylbiimidazole. The initiator may additionally contain a thiol of the formula: <IMAGE> (II) wherein Z is -O-,-S- or -NH-. The composition is not only highly sensitive to ultraviolet ray but also highly stable in storage. |
