Patent ID: 8889774

Claim:
A low VOC coating composition comprising at least one emulsion polymer prepared in the presence of at least one emulsifier according to structural formula: wherein R 1 , R 2 and R 3 are independently selected from the group consisting of: butyl, tert-butyl, isobutyl, wherein: X comprises a divalent hydrocarbon radical comprising a linear or branched alkylene radical having from about 2 to 8 carbon atoms; wherein n is an integer ranging 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, sulfate (SO 4 −M + ), sulfonate (SO 3 −M + ), carboxylate (COO −M + ) a nonionic group, or a quaternary ammonium ion; M+is a cation; further wherein: the emulsifier is present in an amount effective to increase the freeze-thaw stability of the coating composition, said amount comprising greater than about 20 % by weight of total monomer; and the coating composition is a low VOC coating composition having a VOC content of less than about 100 g/L.