| abstract |
The oxime ester compound of the present invention is represented by the following general formula (I) and is useful as a photopolymerization initiator. The photopolymerization initiator containing the oxime ester compound as an active ingredient is activated by efficiently absorbing light having a long wavelength such as 405 nm or 365 nm, and exhibits high sensitivity. (In the formula, R 1 and R 2 represent R 11 , OR 11 , COR 11 , SR 11 , CONR 12 R 13 or CN, and R 11 to R 13 represent a hydrogen atom, a C1-20 alkyl group, C6— 30 aryl group, C7-30 arylalkyl group or C2-20 heterocyclic group, R 3 and R 4 are R 11 , OR 11 , SR 11 , COR 11 , CONR 12 R 13 , NR 12 COR 11 , OCOR 11 , COOR 11 , SCOR 11 , OCSR 11 , COSR 11 , CSOR 11 , CN, halogen atom or hydroxyl group, a and b are 0 to 4, X is an oxygen atom, sulfur atom, selenium atom, CR 31 R 32 , CO, NR 33 or PR 34 is represented, and R 31 to R 34 are the same as R 1. ) |