Abstract: An oxime ester compound represented by general formula (I), wherein R1to R8 are as defined in the description, and n is 0 or 1; a photopolymerization initiator containing the compound; a photosensitive composition, alkali-developable photosensitive resin composition, and colored alkali-developable photosensitive resin composition containing the photopolymerization initiator; and a cured product of these compositions are provided. The compound is useful as a high-sensitivity photopolymerization initiator that has good stability and low sublimability and that efficiently absorbs, and is activated by, near-ultraviolet light, e.g., at 365 nm.

Abstract: Provided is an ?-aminoalkylphenone compound that has good stability and low sublimability, efficiently generates radicals when irradiated with a bright line at 365 nm (I line) or the like, and is useful as a polymerization initiator to be used in a radically polymerizable composition. The ?-aminoalkylphenone compound is represented by Formula (I) mentioned below. In Formula (I) mentioned above, it is preferable that R11 is a nitro group, an alkoxy group having 1 to 12 carbon atoms, or an alkoxycarbonyl group having 1 to 12 carbon atoms. The ?-aminoalkylphenone compound can be preferably used in a polymerization initiator.

Abstract: The present invention provides oxime ester compounds represented by general formula (I), a photopolymerization initiator using said compound, and a photosensitive composition, alkali-developable photosensitive resin composition, and colored alkali-developable photosensitive resin composition containing same, and cured products thereof. The compounds of the present invention have excellent stability and low sublimability, and are useful as highly sensitive photopolymerization initiators that are activated by efficiently absorbing near ultraviolet light of 365 nm, etc. (I) (See the Specification for the definitions of R1-R8 in the formula. n represents 0 or 1.

Abstract: Provided is an ?-aminoalkylphenone compound that has good stability and low sublimability, efficiently generates radicals when irradiated with a bright line at 365 nm (I line) or the like, and is useful as a polymerization initiator to be used in a radically polymerizable composition. The ?-aminoalkylphenone compound is represented by Formula (I) mentioned below. In Formula (I) mentioned above, it is preferable that R11 is a nitro group, an alkoxy group having 1 to 12 carbon atoms, or an alkoxycarbonyl group having 1 to 12 carbon atoms. The ?-aminoalkylphenone compound can be preferably used in a polymerization initiator.

Abstract: Provided are a salt compound, cationic polymerization initiator and cationically polymerizable composition, which have a superior acid-generating capacity and high sensitivity, and are free from coloration. The salt compound is represented by the following general Formula (1): (wherein, R01 to R05 each independently represents a group selected from a hydrogen atom, a fluorine atom and —YR group, one of the R01 to R05 being a —YR group and at least two of the R01 to R05 being fluorine atoms; Y represents an oxygen atom or a sulfur atom; R represents a C1-C4 alkyl group; Ctp+ represents a p-valent cation, the p being 1 or 2; and n represents a coefficient required for maintaining electrical neutrality).

Abstract: Provided are a salt compound, cationic polymerization initiator and cationically polymerizable composition, which have a superior acid-generating capacity and high sensitivity, and are free from coloration. The salt compound is represented by the following general Formula (1): (wherein, R01 to R05 each independently represents a group selected from a hydrogen atom, a fluorine atom and —YR group, one of the R01 to R05 being a —YR group and at least two of the R01 to R05 being fluorine atoms; Y represents an oxygen atom or a sulfur atom; R represents a C1-C4 alkyl group; Ctp+ represents a p-valent cation, the p being 1 or 2; and n represents a coefficient required for maintaining electrical neutrality).