Terpolymer of itaconic acid for high ph scale control

C - Chemistry – Metallurgy – 08 – F

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C08F 220/06 (2006.01) C02F 5/10 (2006.01) C02F 5/14 (2006.01) C08F 222/02 (2006.01) C08K 5/53 (2006.01) C08L 33/02 (2006.01) C08L 35/00 (2006.01)

Patent

CA 2067533

0980H C-1518 TITLE OF THE INVENTION TERPOLYMER OF ITACONIC ACID FOR HIGH pH SCALE CONTROL ABSTRACT OF THE DISCLOSURE A particular terpolymer of itaconic acid (IA) with acrylic acid (AA) and methacrylic acid (MAA), with a molar ratio of monomers of 25-35 M : 30-40 MAA : 30-45 IA, has been found to give excellent inhibition of scale, especially CaCO3 scale, at elevated pH I 8 of 8.5 - 9.5, when used either alone or in combination with phosphonates and acrylate based copolymers.

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