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.
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 R1 and R2 is 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).
NISHIGUCHI HIDEAKI
NAKANISHI HIDEKI
Hiroshi Yamazaki
Masaki Yano
Tsuyoshi Sato
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