| abstract |
The invention relates to a process for introducing water-insoluble photographic additives, in particular color couplers, into aqueous media using high-boiling organic solvents. The aim of the invention is the incorporation of hydrophobic photographic additives, in particular color couplers, in gelatin or other hydrophilic binders. The invention has for its object to provide a new, high-boiling solvent for the dispersion of hydrophobic photographic additives. According to the invention, this is achieved by using phosphorus acid triamides of the general formula and / or other phosphoric acid esters as the high-boiling solvent. The advantage of the process of the invention for introducing hydrophobic photographic additives is a reduced tendency of the additives to crystallize. This results in stable dispersions, which are characterized by good compatibility of the new high-boiling solvents with gelatin and by no negative influence on the photographic properties. |