C - Chemistry – Metallurgy – 23 – F
Patent
C - Chemistry, Metallurgy
23
F
31/34
C23F 11/12 (2006.01) C02F 5/10 (2006.01) C02F 5/12 (2006.01) C02F 5/14 (2006.01) C23F 11/08 (2006.01) C23F 11/10 (2006.01) C23F 11/16 (2006.01) F02B 75/02 (2006.01)
Patent
CA 1258963
"SYNERGISTIC SCALE AND CORROSION INHIBITING ADMIXTURES CONTAINING CARBOXYLIC ACID/ SULFONIC ACID POLYMERS" Abstract of the Disclosure The instant invention is directed to an admixture, and its use in inhibiting scale and corrosion in aqueous systems, comprising: (a) a water-soluble polymer having a weight average molecular weight of less than 25,000, as determined by low angle laser light scattering, comprising an unsaturated carboxylic acid and an unsaturated sulfonic acid, or their salts, having a ratio of 1:20 to 20:1, and (b) at least one compound selected from the group consisting of water-soluble polycarboxylates, phosphonates, phosphates, polyphosphates, metal salts and sulfonates. Abstract (Continued): The instant invention is also directed to a method of inhibiting the formation of insoluble alluvial, metal oxide and metal hydroxide deposits in an aqueous system, comprising adding to the system at least 0.1 mg/l of a water-soluble polymer having a weight average molecular weight of less than 25,000, as determined by low angle laser light scattering, comprising an unsaturated carboxylic acid and an unsaturated sulfonic acid, or their salts, having a ratio of 1:20 to 20:1 and a phosphonate.
448814
Boffardi Bennett P.
Persinski Leonard J.
Walker Jerry L.
Calgon Corporation
Goudreau Gage Dubuc
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