| 摘要 |
Compositions for treating an aqueous medium are provided comprising an effective amount for the purpose of a water-soluble polymer (I) comprising moieties (a) derived from an acrylic acid, or water-soluble salt thereof and moieties (b) of a hydroxylated lower alkyl acrylate, wherein the moieties (a) and (b) of the polymer (I) have respectively the following formulae
<CHEM>
herein R is hydrogen or alkyl of from 1 to 3 carbon atoms; R1 is OH, OM, or NH2 where M is a water-soluble cation; R2 is alkyl of from 2-6 carbon atoms and an effective amount of a water-soluble telomeric phosphinocarboxylic acid compound (II) of the formula
<CHEM>
or a salt thereof, wherein Y sec is hydrogen or a methyl or ethyl residue; Y is hydrogen, a straight or branched alkyl residue having from 1-18 carbon atoms, a cycloalkyl residue having from 5-12 carbon atoms, an aryl residue, an aralkyl residue, a residue of the formula:
<CHEM>
wherein Y sec has the significance given above; and the sum of n and m is zero or an integer of at most 100; or a residue - OX wherein X is hydrogen or a straight or branched alkyl residue having 1-4 carbon atoms and Y min is a residue - OX, wherein X has the significance given above.
<??>These compositions are useful for controlling the deposition of scale-imparting precipitates and in dispersing, and maintaining dispersed, inorganic matter existing in an aqueous medium.
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