Fluorochemical esters blends as repellent polymer melt additives

Abstract

A thermoplastic polymer comprising a blend of a first fluorochemical ester composition of the formula (I): [Rh(CO2)]m-A-[(CO2)-QRf1]n  (I) wherein A is the residue of a polyol, polyacid or mixed bydroxy acid, optionally having one or more unreacted hydroxyl or carboxyl functional groups, having 3 to 12, preferably 3 to 6 carbon atoms, Rh is an alkyl group of 12 to 72 carbon atoms, Rf is a fluoroalkyl group or 3 to 12 carbon atoms, Q is a divalent linking group, each (CO2) group is non-directional, and m and n are each at least 1; and a second fluorochemical ester composition of formula (II) Rf2—O—C(O)—R1 or Rf—C(O)—O—R1  (II) wherein Rf is F(CF2)x—SO2N(R2)-R3 wherein x is a positive integer from about 4 to about 20, R2 is an alkyl radical of from 1 to about 4 carbon atoms, and R3 is an alkylene radical of from 1 to about 12 carbon atoms; and R1 is an aliphatic linear hydrocarbon having an average of from 12 to 66 carbon atoms.

Dependencies are inferred from the claim text.