Patent ID: 8580883

Claim:
A method of imparting freeze-thaw stability to a polymer coating composition having a VOC level of less than about 100 g/L, comprising adding to the composition an effective amount of an additive of structural formula IIA: wherein R 1 , R 2 and R 3 are independently selected from the group consisting of: butyl, tert-butyl, isobutyl, wherein: X is a divalent hydrocarbon radical comprising a linear or branched alkylene radical having from about 2 to 8 carbon atoms; n is an integer of from 1 to 100; R 5 comprises —OH, —OCH 3 , —OC 2 H 5 , —OC 3 H 7 , —OC 4 H 9 , —OC 5 H 11 , —OC 6 H 13 , —Cl, —Br, —CN, phosphonate (—PO 3 − M + ), phosphate (—PO 4 − M + ), sulfate (—SO 4 − M + ), sulfonate (—SO 3 − M + ), carboxylate (COO − M + ), a nonionic group, or a quaternary ammonium ion, and M + is a cation; further wherein the effective amount is an amount of the additive greater than about 1.3% by weight of the polymer.