Patent ID: 7229737

Claim:
A photopolymerizable composition comprising: (a) a polymerizable compound having an addition-polymerizable unsaturated bond; (b) an organic dye; and (c) at least one kind of an organoboron compound represented by the following general formula (I) in a proportion of at least four moles of organoboron compound per mole of the organic dye: B ⊖ R) 4 X ⊕ General formula (I) wherein R is selected from the group consisting of an alkyl group, a substituted alkyl group, an aryl group, a substituted aryl group, an aralkyl group, a substituted aralkyl group, an alkaryl group, a substituted alkaryl group, an alkenyl group, a substituted alkenyl group, an alkynyl group, a substituted alkynyl group, an alicyclic group, a substituted alicyclic group, a heterocyclic group, a substituted heterocyclic group, and a derivative thereof; Rs may be the same as or different from each other; two or more of these groups may join together directly or via a substituent and form a boron-containing heterocycle; and X represents an alkali metal, quaternary ammonium, pyridinium, quinolinium, diazonium, morpholinium, tetrazolium, acridinium, phosphonium, sulfonium, oxosulfonium, iodonium, S, P, Cu, Ag, Hg, Pd, Fe, Co, Sn, Mo, Cr, Ni, As, or Se; wherein the photopolymerizable composition further includes heat-responsive microcapsules comprising a color-forming component.