Partially fluorinated esters or amide/esters of benzene polycarboxylic acids, and dyeable pet and nylon fibers incorporating the same and process of making such fibers

A compound having the formula ##STR32## wherein the attachment of the fluorinated radicals and the radicals CO.sub.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.sub.2).sub.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.sub.2 RCHOH or is CH.sub.2 RCHOCH.sub.2 RCHOH where "R" is hydrogen or methyl, or "B" is CH.sub.2 CH(OH)CH.sub.2 Q where Q is halogen, hydroxy, or nitrile;
• or " B" is CH.sub.2 CH(OH)CH.sub.2 OCH.sub.2 CH(OH)CH.sub.2 Q;
• and r is an integer of at least 1 but not greater than q;
• and X(CF.sub.2).sub.m, W and Y are straight chains, branched chains or cyclic;
• and wherein the substituent chains of the active general formulas are the same or different;
• said compound being capable, upon contact thereof--as a solution or dispersion--with fibers of polyethylene terephthalate or of nylon and heating, of imparting water and oil repellency to such fibers.