| 摘要 |
<p>A novel polymer hs an intrinsic viscosity of 0.05 to 2.5 dl/g and is prepared from (A) 50 to 95% by weight of an unsaturated carboxylic acid, or its salt, and (B) 5 to 50% by weight of a betaine-containing monomer of formula <CHEM> where each R, which may be the same as or different from the others, is a hydrogen atom or a straight or branched alkyl aryl or alkylaryl group containing up to 20 carbon atoms, preferably a hydrogen atom or C1-5 alkyl group, the or each R<1>, which may be the same as or different from the other, if present, is a saturated straight or branched C1-10 alkylene group, preferably C1-5 alkylene, A is NH or O; and <CHEM> At least 0.1 ppm of such a polymer is added to an aqueous system to inhibit corrosion and the formation and deposition of scale.</p> |
