ACRYLIC ACID/2-ACRYLAMIDO-2-METHYLPROPYLSULPHONIC ACID/2-ACRYLAMIDO-2-METHYLPROPYL PHOSPHONIC ACID POLYMERS AND THEIR USE AS SCALE AND CORROSION INHIBITORS

摘要

Novel polymers having an intrinsic viscosity of 0.05 to 4.5 dI/ g in 1.0 M NaCI are prepared from:(A) 35 to 65% by weight of acrylic acid or methacrylic acid;(B) 15 to 45% by weight of 2-acrylamido-2-methyl-propyl- sulphonic acid or 2-methacrylamido-2-methyl-propylsulphonic acid; and(C) 15 to 25% by weight of 2-acrylamido-2-methyl-propyl phosphonic acid or 2-methacrylamido-2-methylpropylphos- phonic acid.;Corrosion and the precipitation of scale-forming salts in an aqueous solution is inhibited by adding to the system at least 0.1 mg/l of such a polymer.