| 摘要 |
PURPOSE:To improve the sensitivity to such a light source having the light emission spectra strong to a long wavelength side by incorporating at least one kind of specific compds. as a photopolymn. initiator. CONSTITUTION:The photopolymerizable compsn. is formed to contain the compd. having at least one ethylenic unsatd. double bonds and the photopolymn. initiator expressed by formula I. In the formula I, R1, R2 respectively independently denote a substd. or unsubstd. alkyl group, aryl group or alkenyl group or R1 and R2 may form a ring consisting of a nonmetal element together with a sulfur atom to which they bond; n denotes 0 or 1 or 2 ; G1, G2 denote a hydrogen group, cyano group, etc. There is no case G1 and G2 are simultaneously the hydrogen atoms; G1 and G2 may form a ring consisting of a nonmetal element together with a sulfur atom to which they bond. The photopolymerizable compsn. which has the sufficient sensitivity to the light source having the light emission spectra strong to the long wavelength side and exhibiting the high sensitivity is obtd. in this way.
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