Process for treating fibers with an antistatic finish

Synthetic fibers containing an antistatic finish applied thereto by the process comprising the steps of

• I) applying to the synthetic fibers a composition comprising
• a) at least one salt of a phosphate partial ester of the formula ##STR2## wherein R is the dodecyl group,
• M.sup.+ is an alkali metal cation, a mono--, di--, or tri-alkyl amine cation, or a mono--, di-- or trialkanolamine cation,
• n and m are each independently an integer of from 0 to 6,
• x is 0 or 1, and
• y is 2 when x is 0 and 1 when x is 1;
• except that the partial ester salt of formula I cannot be potassium lauryl phosphate:
• b) at least one anionic and/or cationic emulsifier;
• and
• c) at least one lubricant;
• and
• II) autoclaving the fibers from step I at a temperature in the range of from about 93.degree. C. to about 150.degree. C.