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US 7,459,513 B2Granted
Acrylic-acid-based homopolymers comprising taurine modified for the treatment of water
AssigneeBASF SE
InventorsMarcus Guzmann, Karl-Heinz Buechner, Pia Baum, Gregor Brodt
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Abstract
A description is given of (meth)acrylic acid copolymers containing methacrylic acid units, the polymer being functionalized with aminoalkylsulfonic acid. In addition, a description is given of a process for preparation thereof and use thereof for water treatment, scale inhibition in petroleum production and corrosion inhibition in aqueous systems.
Claims4
A process for preparing (meth)acrylic acid copolymers, which comprises the steps:
- (1) free-radically polymerizating (meth)acrylic acid, thereby resulting in a polymer I;
- and
- (2) amidating polymer I resulting from process step (1) by reaction with at least one aminoalkanesulfonic acid to form a sulfonated polymer, wherein the molar ratio of monomers in polymer I to aminoalkanesulfonic acid ranges from 15:1 to 4:1 and the (meth)acrylic acid copolymer comprises:
- (a) from 30 to 95% by weight of a poly(meth)acrylic acid basic framework,
- (b) from 5 to 70% by weight of amide units based on aminoalkylsulfonic acids,
- the total weight of the units in the sulfonated polymer being 100% by weight and all weights being based on the sulfonated polymer.
3 more elements
Dependencies are inferred from the claim text.