초록 ▼

The present invention relates to a novel class of compounds which absorb light at wavelengths greater than 350 nm and are useful as fluorescers or as photoinitiators. The present invention provides compounds of the formulas (I) and (II) and their equivalents (the nomenclature of the compounds used h

The present invention relates to a novel class of compounds which absorb light at wavelengths greater than 350 nm and are useful as fluorescers or as photoinitiators. The present invention provides compounds of the formulas (I) and (II) and their equivalents (the nomenclature of the compounds used herein is based on the numbering of positions as shown in formula (I)): [Figure] I [Figure] II where: when W is 〓O, W1 is hydrogen or －OR9 and when W is 〓NR+2, W is hydrogen or －NR2, A is hydrogen, alkenyl, alkyl or an election withdrawing group, and the remaining groups are as defined in the disclosure.

대표청구항 ▼

A photohardenable composition which comprises a cationically polymerizable compound selected from the group consisting of epoxy compounds, vinyl ethers, vinyl ether functional prepolymers, cyclic ethers, cyclic esters, cyclic sulfides, melamine-formaldehyde, phenol-formaldehyde, cyclic organosiloxan

A photohardenable composition which comprises a cationically polymerizable compound selected from the group consisting of epoxy compounds, vinyl ethers, vinyl ether functional prepolymers, cyclic ethers, cyclic esters, cyclic sulfides, melamine-formaldehyde, phenol-formaldehyde, cyclic organosiloxanes, lactams, lactones, cyclic acetals, and epoxy functional silicone oligomers; a dye represented by the Formula (I) or (II): [Figure] I [Figure] II where R1, R2, R5 and R6 are the same or different and represent a hydrogen atom or a halogen atom and where R1 and R2 may combine to form a ring; R3 and R4 are the same or different and represent a hydrogen atom, a halogen atom, a benzoyl group, a group of the formula －L(CH2)nR8 where n is 1 to 8, R8 is hydrogen, hydroxy, amino, dialkylamino, －COR16 or －COOR14 where R16 is hydrogen, chlorine, COCl, C1-C8 alkyl, NR2, or aryl, and R14 is hydrogen, C1-C8 alkyl, aryl, COR, NR2; and L is a direct bond or >C〓O; W is O or >NR2+where R is hydrogen or lower alkyl, when W is O, W1 is hydrogen or －OR9 where R9 is hydrogen, C1-C8 alkyl, acyl or a group of the formula －(CH2)nR10 where n is 1 to 8 and R10 is amino, dialkylamino, hydroxy, acryloyl or methacryloyl and when W is >NR2+, W1 is hydrogen or －NR2; Y is oxygen, sulfur, selenium, tellurium, >C〓O, or >N－R13, where R13 is 4-methylphenyl, A is hydrogen, aryl, alkenyl, alkynyl, dichlorotriazinylamino, alkyl, or an electron withdrawing group (EWG) which is a stronger electron withdrawing group than a phenyl group or a halogen-substituted or a carboxyl-substituted phenyl group; provided that at least one R1-R6 is halogen; and a salt selected from the group consisting of iodonium salts, thiapyrylium salts, diazonium salts and ferrocenium salts, said salt being a salt of a non-nucleophilic anion.