| 摘要 |
<p>Polymer dispersions useful as a replacement for casein in paper coatings, and paper coating compositions containing such dispersions, are described. The dispersions comprise from about 85 to 95 percent by weight of an ethylenically unsaturated monomer free from additional functionality, i.e., styrene or vinyl esters of acetic acid and/or propionic acid, and from about 5 to 15 percent by weight of acid, i.e., acrylic acid, and basic, i.e., 1-vinylimidazole, monomers. Paper coating compositions containing the dispersion as a casein substitute when applied to paper in a conventional manner have excellent properties including whiteness, wet rub resistance, and water resistance.</p> |
