| 摘要 |
PURPOSE:To effectively suppress scale, by using a polymer consisting of water- soluble org. phosphonic acid having a carbon-phosphorus bond, a water-soluble zinc salt and a specific monoethylenic unsaturated sulfonic acid monomer. CONSTITUTION:Water-soluble org. phosphonic acid such as 2- phosphonobutane-1,2,4-tricarboxylic acid or 1-phosphonopropane-2,3-dicarboxylic acid, a water-soluble zinc salt (e.g., zinc chloride, zinc sulfate) and a monoethylenic unsaturated sulfonic acid monomer (e.g., 2-acrylamide-2- methylpropanesulfonic acid, 2-methacrylamide-2-methylpropanesulfonic acid) are copolymerized along with acrylic acid to form copolymer. The wt. average MW of this copolymer is pref. 10<3>-10<5>. This copolymer is used as a scale inhibitor to make it possible to enhance operability. |
