| 摘要 |
<p>A method of inhibiting and preventing scale in an aqueous system is described which comprises incorporating in the water at least one amino carboxylate having the formula: RN[-(CH2)x-Z]2 in which x is 1 or 2, R represents -(CH2)x-Z or -CH2CH2N[-(CH2)x-Z]2 and Z represents a -COOH group, or a salt thereof, and at least one water-soluble copolymer possessing recurring units of the formula: <IMAGE> wherein R1 represents hydrogen, lower alkyl or -CH2COOH, R2 represents hydrogen or lower alkyl, X represents -COOH and Z represents hydrogen or -COOH, or X and Z together represent -CO-O-CO-, and Y represents -SO3H, -C6H5 SO3H (para) or -CONHQ(R3)(R4) SO3H in which Q represents -CH2- or -CH2-CH2- and R3 and R4 independently represent hydrogen, phenyl, substituted phenyl, C 1-12 linear or branched alkyl or C 3-12 cycloalkyl, or a salt thereof.</p> |
