| 摘要 |
Treatment of an aqueous medium is attained by adding to said aqueous medium 0.5 to 500 ppm of a copolymer containing at least one of each of the following three monomers: (a) monounsaturated carboxylic acids as well as salts and anhydrides thereof, the acids containing 3 to 5 carbon atoms, such as acrylic acid, methacrylic acid, maleic acid or its anhydride; (b) acrylamidoalkane sulfonic acids and salts thereof, such as 2-acrylamido-2-methylpropane sulfonic acid; and (c) primary copolymerizable monomers selected from acrylamides, alkyl acrylates, vinyl sulfonic acid and salts thereof, hydroxyalkyl acrylates, styrene sulfonic acids and salts thereof, allyloxy hydroxyalkane sulfonic acids and salts thereof, and vinyl carboxylates, and hydrolyzed vinyl carboxylates. Addition of the copolymer to said aqueous medium results in one or all of the following: inhibition of scale formation, metal ion stabilization, and dispersion of particulate matter.
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