LIGHT-ABSORBING DISPERSION CONTAINING FINE PARTICLES OF SUBSTITUTED BENZENEDITHIOL METAL COMPLEX, COMPOSITION FOR LIGHT-ABSORBING MEMBER USING SAME, AND LIGHT-ABSORBING MEMBER

摘要

PROBLEM TO BE SOLVED: To provide a dispersion of fine particles of a metal complex capable of maintaining a stable dispersion state without reaggregating over a long period, having long-lasting, excellent light resistance even an UV-A which is conventionally difficult to block.SOLUTION: The light-absorbing dispersion contains a substituted benzenedithiol metal complex expressed by formula (1) and the particles of the substituted benzenedithiol metal complex is dispersed in a single or mixed dispersion medium containing one or more media selected from the group consisting of water, organic solvents, and polymerizable monomers. (In the formula, each of Rand Ris independently a 1-8C alkyl group, a 1-8C alkyl amino group, monopholino group which can have a substituted group, a pyperidino group which can have a substituted group, a pyrrolidino group which can have a substituted group, a thiomorpholino group which can have substituted group, a pyperazino group which can have substituted group, and a phenyl group which can have a substituted group. M expresses a metal atom, A+ expresses quaternary ammonium cation or quaternary phosphonium cation. (n) expresses optional integer and is different corresponding to oxidation number of the metal atom M).