| 摘要 |
A dye mordanting composition comprises at least one hydrophilic organic colloid, e.g. gelatin and ethanolamine cellulose acetate, containing a finely-divided uniform dispersion of droplets of a water-immiscible organic solvent boiling above 175 DEG C., the droplets containing dissolved therein a non-polymeric non-wandering organic cationic mordant for acid dyes. The composition may also include mordanted acid dyes. The composition is made by dissolving the cationic mordant in the water-immiscible organic solvent, if desired together with an auxiliary lower-boiling or water-soluble organic solvent, and dispersing the solution in an aqueous solution of the colloid, optionally in the presence of a surfactant, the auxiliary solvent being subsequently removed by air drying or washing. The cationic mordants described-are quaternary ammonium and phosphonium and ternary sulphonium compounds having a hydrophobic ballast group i.e. a radical having at least 8 carbon atoms, and a list is given including tetra - n - octylammonium bromide, 1:4 - di - n - decyl - 1:4 - diazabicyclo (2:2:2) - octanium perchlorate, n - hexadecyltriphenyl-phosphonium bromide and S,S-di-n-lauryl-S-methylsulphonium thiocyanate. The organic solvents boiling above 175 DEG C. include organic carboxylic esters and phosphates such as di-n-butyl phthalate and triphenyl phosphate, and 2:4-di-n-amylphenol.
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