Patent ID: 6165686
Filing Date: 2000-12-26
Classification: C09D,G03F,Y10S

Abstract:
A photocurable color reversion preventing composition which comprises one or more phosphorous compounds; a compound with an ethylenic unsaturated bond; a cationic dye represented by general formula (1); and a quaternary organo borate represented by general formula (2);D.sup.+ .multidot.A.sup.- ( 1)where D.sup.+ is a cation of a cationic dye with maximum absorption in the visible light range of 400-740 nm, which cationic dye is selected from the group consisting of methine-, polymethine-, xanthene-, azine-, oxazine-, thiazine-, diarylmethane- and triarylmethane-based cationic dyes and A.sup.- represents any anion; ##STR16## where R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each independently represent an alkyl group, an aryl group, an aralkyl group, an alkenyl group, an alkynyl group, a silyl group, 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 wherein the quaternary organo borate represented by general formula (2) is present in an amount of substantially excess molar ratio with respect to the cationic dye represented by general formula (1).