Coating for concrete structures

Abstract

The subject invention relates to a latex blend which is particularly beneficial when utilized in manufacturing coatings for concrete structures, said latex being comprised of a blend of (1) from about 60 weight percent to about 95 weight percent of a first latex which is comprised of (a) water, (b) a polymer that is comprised of repeat units which are derived from about 30 to about 70 weight percent vinyl aromatic monomers, from about 25 to about 65 weight percent of at least one alkyl acrylate monomer, from about 1 to about 5 weight percent of acrylic acid and from about 0.4 to about 3 weight percent methacrylic acid, (c) about 0.2 phr to 0.4 phr of at least one sulfonate surfactant and (d) about 4 phr to 8 phr of at least one water-insoluble nonionic surface active agent having a hydrophilic-lipophile balance number which is within the range of about 12 to about 20 and (2) from about 5 weight percent to about 40 weight percent of a second latex which is comprised of (a) water, (b) a polymer that is comprised of repeat units which are derived from about 70 weight percent to about 100 weight percent diene monomers and from 0 weight percent to about 30 weight percent vinyl aromatic monomers and (c) an emulsifier.

Dependencies are inferred from the claim text.