THE ACTION OF LIPOPHILIC UV ABSORBERS - SOLUBILIZED BY CYCLODEXTRIN -ON PHOTOFADING OF AQUEOUS-SOLUTION OF AZOREACTIVE DYES

Two representatives of water-insoluble UV absorbers (3-(4-methylbenzil idene)-camphor and 2-hydroxy-4-methoxybenzophenon), different in their chemical structure, could be solubilized by two pairs of studied CDs (BCD, GCD, RAMEB, AcGCD). The substituted CD entities were markedly mo re effective solubilizers than the unsubstituted ones. The rate of pho tofading of an aqueous azoreactive dye solution was significantly incr eased in the presence of the substituted CDs. Mixing UV absorbers, sol ubilized by the mentioned CDs, to the aqueous dye solution marked dece leration in photofading could be achieved.