초록 ▼

A photocurable composition comprising an ultraviolet radical polymerization initiator, a cationic dye with absorptions in the visible light region, a quaternary boron salt and optionally a polymerization accelerator, is irradiated with ultraviolet light and visible light either simultaneously or sep

A photocurable composition comprising an ultraviolet radical polymerization initiator, a cationic dye with absorptions in the visible light region, a quaternary boron salt and optionally a polymerization accelerator, is irradiated with ultraviolet light and visible light either simultaneously or separately, to achieve adequate hardening in air of both the surface and the interior of the cured product, and to provide a cured product with an excellent appearance and without production of coloring substances derived from the polymerization initiator.

대표청구항 ▼

[ What is claimed is:] [1.] A photocurable composition comprising(A) 100 parts by weight of a compound with an ethylenically unsaturated bond,(B) 0.001-5 parts by weight of a cationic dye with absorptions in the visible light region of 400-740 nm, represented by general formula (1):EQU D.sup.+ .mult

[ What is claimed is:] [1.] A photocurable composition comprising(A) 100 parts by weight of a compound with an ethylenically unsaturated bond,(B) 0.001-5 parts by weight of a cationic dye with absorptions in the visible light region of 400-740 nm, represented by general formula (1):EQU D.sup.+ .multidot.A.sub.1.sup.- ( 1) rein D.sup.+ is a cationic dye with absorptions in the visible light region of 400-740 nm and A.sub.1.sup.- is an anion,(C) 0.005-10 parts by weight of a quaternary boron salt sensitizer represented by general formula (2): [ STR 26 ] wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each independently represent an alkyl group which may have a substituent, an aryl group which may have a substituent, an allyl group which may have a substituent, an aralkyl group which may have a substituent, an alkenyl group which may have a substituent, an alkynyl group which may have a substituent, a silyl group which may have a substituent, a heterocyclic group or a halogen atom, and Z.sup.+ represents a quaternary ammonium cation, quaternary pyridinium cation, quaternary quinolinium cation, phosphonium cation, sulfonium cation, oxosulfonium cation, iodonium cation or metal cation, and(D) 0.01-10 parts by weight of an ultraviolet radical polymerization initiator which generates radicals upon absorption of light of wavelength 200-400 nm, wherein the ultraviolet radical polymerization initiator is a compound represented by general formula (9): [ STR 27 ] wherein Ar represents an aryl group which may have a substituent, and X represents a phosphinoyl group with a substituent.