| 摘要 |
<p>1,141,582. Ethylene-vinyl chloride-acrylamide interpolymers. MONSANTO CO. 5 May, 1967 [6 May, 1966], No. 21005/67. Heading C3P. [Also in Division B2] An interpolymer comprises (a) 15 to 70% ethylene, 30 to 85% vinyl chloride and 0À1 to 10% of acrylamide, in which a part of the acrylamide may be replaced by another polar monomer which is a mono- or dibasic unsaturated acid or derivative thereof, or a vinyl ester, or (b) the interpolymer (a) when treated with an acid or base having an ionization constant greater than 10<SP>-4</SP> at 25‹ C. in amounts stoichiometically equivalent to up to 100% of the amide content of the interpolymer. The interpolymer may be formed in an aqueous dispersion or latex by emulsion polymerization of the monomers using a free-radical catalyst. The aqueous dispersions may be compounded with e.g. finely divided pigments, pigment binders such as starch and protein, and other conventional additives such as polyvinyl-alcohol and sodium tetraphosphate. Exemplified interpolymers are of ethylene, vinyl chloride and acrylamide and in some cases the following fourth monomers: sodium acrylate, sodium methacrylate, hydroxyethylacrylate, N-isopropylacrylamide, N-ethylmethacrylamide, diammonium itaconate, monobutylacid maleate and N-methacrylylpropionamide.</p> |
