C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
402/321, 134/39
C02F 5/10 (2006.01) C02F 5/12 (2006.01) C08F 220/06 (2006.01) C08F 222/02 (2006.01) C23F 11/173 (2006.01)
Patent
CA 1239742
TITLE OF THE INVENTION CARBOXYLIC/SULFONIC/POLYALKYLENE OXIDE POLYMER FOR USE AS SCALE, CORROSION, AND IRON OXIDE DEPOSIT CONTROL ABSTRACT OF THE DISCLOSURE The instant invention is directed to a process for inhibiting corrosion and the formation and deposition of scale and iron oxide in aqueous systems, comprising adding to the system at least 0.1 ppm of a water-soluble polymer having an intrinsic viscosity of 0.05 to 2.5 dl/g, prepared from: (a) 35 to 90%, by weight, of an unsaturated carboxylic acid, or its salt; (b) 5 to 40%, by weight, of an unsaturated sulfonic acid, or its salt; and (c) 5 to 40%, by weight, of an unsaturated, polyalkylene oxide compound. The instant invention is also directed to a water soluble polymer, having an intrinsic viscosity of 0.05 to 2.5 dl/g, prepared from: - 2 - (a) 35 to 90%, by weight, of an unsaturated carboxylic compound selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, itaconic acid, their salts and mixtures thereof; (b) 5 to 40%, by weight, of an unsaturated sulfonic compound selected from the group consisting of 2-acrylamido-2-methylpropyl- sulfonic acid, 2-methacrylamido- 2-methylpropyl sulfonic acid, methallyl sulfonic acid, allylsulfonic acid, vinyl sulfonic acid, styrene sulfonic acid, their salts and mixtures thereof; and (c) 5 to 40%, by weight, of an unsaturated, polyalkylene oxide compound.
491558
Cha Charles Y.
Chen Shih-Ruey T.
Varsanik Richard G.
Calgon Corporation
Goudreau Gage Dubuc
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