Polyester textile materials having improved durable soil release characteristics and process for producing same

摘要

Textile materials formed of polyester fibers having improved durable soil release characteristics are provided by applying to the textile material an effective amount of an aqueous emulsion consisting essentially of from about 0.25 to about 25 weight percent of a synthetic acid emulsion polymer and at least 0.01 weight percent of a water-soluble salt in which the cation moiety of the salt is a polyvalent metal ion of magnesium, barium or calcium and the anion moiety is a halogen or the anion moiety of a weak organic acid in which the pK value of such acid is from about 3 to about 5. The synthetic acid emulsion polymer is further characterized as having at least about 20 weight percent acid calculated as acrylic acid. The before-mentioned aqueous emulsion is applied to the textile material in an amount sufficient to provide at least about 0.05 weight percent solids on the textile material, such solids being a combination of the emulsion polymer and the salt constituent. The resulting wet textile material is thereafter dried to remove substantially all of the water and thereafter the dry textile material is heated to a temperature of from about 280 DEG F to about 450 DEG F for a time sufficient to cure the polymer containing the salt constituent.