| abstract |
A latex which affords a film having superior heat resistance, gloss, and transparency is comprised of: (1) water; (2) a styrene-maleic anhydride copolymer solubilized by a solubilizing amount of ammonium hydroxide; (3) a graft copolymer which is comprised of a portion of the solubilized styrenemaleic anhydride copolymer onto which is grafted a polymer formed from the polymerization of one or more polymerizable ethylenically unsaturated monomers selected from the group consisting of an acrylate, a methacrylate, an aromatic alkenyl monomer, an aliphatic alkenyl monomer, and combinations thereof; (4) a polymer dispersed in the water which is comprised of one or more ethylenically unsaturated monomers selected from the group consisting of an acrylate, a methacrylate, an aromatic alkenyl monomer, an aliphatic alkenyl monomer, and combinations thereof dispersed in the water; (5) a nonionic or anionic surfactant, or a combination thereof; and, (6) optionally, zinc or zirconyl ammonium carbonate. The latex has pH in the range of from about 9.0 to about 11.0. |