SALTS OF SUBSTITUTED FLUOROCHLOROCARBOXYLIC ACIDS AS EMULSIFIERS IN PROCESS OF DISPERSING OF COLORED HYDROPHOBIC COMPONENTS Russian patent published in 1997 - IPC

FIELD: photography. SUBSTANCE: salts have common formula CF₃-(CFCL)₂-(CF)_n-COOMe where Me is K if n=4, Me is Na if n=2, Me is NH₄ if n=6. ω-hydro-2,3-dichloroperfluoroalkane, NO₂ and Cl₂ are affected by interaction at 480 C, their molar ratio is 1:3:3. Thus prepared acid fluorides are affected by esterification and then rectified. Thus obtained esters are affected by saponification, the process takes place by heating to 50 C in methanol or ethanol solution. Excess of alcohol is distilled and residue is dried at 130-160 C. EFFECT: increased degree of dispersity, increased stability. 2 tbl