| 摘要 |
<p>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:
<Chemistry id="chema01" num="0001"><Image id="ia01" he="25" wi="85" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein R<Sup>1</Sup> and R<Sup>2</Sup> 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:
<Chemistry id="chema02" num="0002"><Image id="ia02" he="17" wi="94" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein Z is -0-, -S- or -NH-. The composition is not only highly sensitive to ultraviolet ray but also highly stable in storage.</p> |
