Soil resistant spin finish for polyamide textile yarn

Claim 1

A spin finish for polyamide yarn to be processed at high temperature into bulked textile yarn that is oil repellent and resistant to soiling by oily materials, said spin finish comprising an oil in water emulsion containing 5 to 20 percent by weight of a first oil composition consisting essentially of about 45 to 55 weight percent of an alkanol amide which is the reaction product of coco fatty acid containing about 6 to 18 carbon atoms and diethanol amine, and about 45 to 55 weight percent of a fluorochemical compound having the formula ##STR4## wherein the attachment of the fluorinated radicals and the radicals CO 2 B to the nucleus is in asymmetrical positions with respect to rotation about the axis through the center of the nucleus; wherein "X" is fluorine, or perfluoroalkoxy of 1 to 6 carbon atoms, and m has arithmetic mean between 2 and 20; n is zero or unity; "W" and "Y" are alkylene, cycloalkylene or alkyleneoxy radicals of combined chain length from 2 to 20 atoms; (CF 2 ) m and "Y" have each at least 2 carbon atoms in the main chain; "Z" is oxygen and p is 1, or "Z" is nitrogen and p is 2; q is an integer of at least 2 but not greater than 5; "B" is CH 2 RCHOH or is CH 2 RCHOCH 2 RCHOH where "R" is hydrogen or methyl, or "B" is CH 2 CH(OH)CH 2 Q where Q is halogen, hydroxy, or nitrile; or "B" is CH 2 CH(OH)CH 2 OCH 2 CH(OH)CH 2 Q; and r is an integer of at least 1 but not greater than q; and X(CF 2 ) m , W and Y are straight chains, branched chains or cyclic; and wherein the substituent chains of the above general formulas are the same or different, said oil in water emulsion being mixed with 5 to 20 percent by weight of said emulsion of a second oil composition consisting essentially of from about 40 to 50 weight percent of an alkyl stearate wherein the alkyl group contains 4 to 18 carbon atoms, about 25 to 30 weight percent sorbitan monooleate, and about 25 to 30 weight percent of polyoxyethylene tallow amine containing about 18 to 22 moles of ethylene oxide per mole of polyoxyethylene tallow amine.