Sulfobetaine-containing polymers and their utility as calcium carbonate scale inhibitors
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United States of America Patent
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May 1, 2001
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N/A
app pub date -
May 14, 1998
filing date -
Sep 19, 1996
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Expired
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Abstract
The invention is a water-soluble N,N-diallyl-N-alkyl-N-(sulfoalkyl) ammonium betaine containing copolymer, wherein said copolymer is formed from the polymerization of an N,N-diallyl-N-alkyl-N-(sulfoalkyl) ammonium betaine of the formula: ##STR1## wherein R is selected from the group consisting of alkyl and aryl groups, and R.sub.1 is selected from the group consisting of alkyl groups, aryl groups, and alkylaryl groups, and an anionic monomer, and the invention is also a method of inhibiting the precipitation and deposition of scale on metal surfaces in contact with industrial cooling waters comprising the addition of an effective, scale-inhibiting amount of a water-soluble N,N-diallyl-N-alkyl-N-(sulfoalkyl) ammonium betaine containing copolymer, wherein said copolymer is formed from the polymerization of a betaine of the formula: ##STR2## wherein R is selected from the group consisting of alkyl and aryl groups, and R.sub.1 is selected from the group consisting of alkyl groups, aryl groups, and alkylaryl groups, and an anionic monomer.
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