C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/313
C08F 222/02 (2006.01) C02F 5/10 (2006.01) C08F 8/12 (2006.01)
Patent
CA 1278142
Abstract of the Disclosure: Slightly crosslinked, water- soluble polymaleic acid which is obtainable by polymeriza- tion of maleic anhydride with from 0.1 to 10% by weight of a crosslinking agent in an aromatic hydrocarbon at from 60 to 200°C in the presence of from 1 to 20% by weight, based on maleic anhydride, of a peroxyester, and hydrolysis of the polymer to give slightly crosslinked polymaleic acid having a Fikentscher K value of from 8 to 20 (measured at 20°C in 5% strength aqueous solution at pH 7 as the Na salt), a process for the preparation of slightly cross- linked polymaleic acid, and its use as a water treatment agent for reducing boiler scale and hard water deposits in water-conveying systems.
546621
Denzinger Walter
Goeckel Ulrich
Hartmann Heinrich
Raubenheimer Hans-Juergen
Richter Felix
Basf Aktiengesellschaft
Borden Ladner Gervais Llp
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