C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
402/322, 31/52
C02F 5/12 (2006.01) C23F 11/173 (2006.01)
Patent
CA 1233000
TITLE OF THE INVENTION CARBOXYLIC/SULFONIC/QUATERNARY AMMONIUM POLYMERS FOR USE AS SCALE AND CORROSION INHIBITORS ABSTRACT OF THE DISCLOSURE The instant invention is directed to a process for inhibiting corrosion and the formation and deposition of scale 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, prepared from: (a) 50 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 quaternary ammonium compound. The instant invention is also directed to a water soluble polymer, having an intrinsic viscosity of 0.05 to 2.5 prepared from: - 2 - (a) 50 to 90%, by weight, of an unsaturated carboxylic compound selected from the group consisting of acrylic acid, methacrylic 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-methylpropylsulfonic acid, 2-methacrylamido 2-methylpropyl sulfonic acid, their salts and mixtures thereof; and (c) 5 to 40%, by weight, dimethyl diallyl ammonium chloride, diethyl diallyl ammonium chloride and mixtures thereof.
477414
Calgon Corporation
Goudreau Gage Dubuc
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