| abstract |
A photopolymerization initiator comprises a borate salt represented by the general formula (I): nM n⊕ (B ⊖ R¹R²R³R⁴) n nwherein R¹, R², R³ and R⁴ are respectively any one of halogen atoms, alkyl radicals, alkenyl radicals, alkynyl radicals, alicyclic radicals, aryl radicals, aryloxyl radicals, alkoxyl radicals, aralkyl radicals, and heterocyclic radicals, and may be the same with or different from each other; R¹ and R², or R² and R³ may be linked to form a ring; M is an atom of a metal selected from Groups IB, IIB, IIIA, and IVA of the periodic table; and n is an integer of 1 or 2. n A photosensitive composition comprises at least a polymerizable compound and a photopolymerization initiator represented by the above general formula (I). |