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    • 27. 发明授权
    • Copolymers formed from polymerization of
N,N-diallyl-N-alkyl-N-(sulfoalkyl) ammonium betaine and their utility
as calcium carbonate scale inhibitors
    • 由N,N-二烯丙基-N-烷基-N-(磺基烷基)铵甜菜碱的聚合形成的共聚物及其作为碳酸钙垢抑制剂的用途
    • US5788866A
    • 1998-08-04
    • US715778
    • 1996-09-19
    • Dodd W. FongCharles F. MarthRonald V. Davis
    • Dodd W. FongCharles F. MarthRonald V. Davis
    • C02F5/12C08F220/04C08F226/04C08G73/06C23F14/02C02F1/00
    • C08G73/0611C02F5/12
    • 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. 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. A preferred polymer is a water-soluble copolymer of N,N-diallyl-N-methyl-N-(2-sulfoethyl) ammonium betaine and acrylic acid.
    • 本发明是一种水溶性N,N-二烯丙基-N-烷基-N-(磺基烷基)铵甜菜碱共聚物,其中所述共聚物是由N,N-二烯丙基-N-烷基-N-( 磺基烷基)铵甜菜碱,其结构式如下:其中R选自烷基和芳基,R 1选自烷基,芳基和烷基芳基,和阴离子单体。 本发明还是一种抑制与工业冷却水接触的金属表面沉淀和沉积的方法,包括加入有效的阻垢量的水溶性N,N-二烯丙基-N-烷基-N - (磺基烷基)铵甜菜碱的共聚物,其中所述共聚物由下式的甜菜碱的聚合形成:其中R选自烷基和芳基,R 1选自由以下组成的组: 烷基,芳基和烷芳基,以及阴离子单体。 优选的聚合物是N,N-二烯丙基-N-甲基-N-(2-磺乙基)铵甜菜碱和丙烯酸的水溶性共聚物。