| 摘要 |
<p>The scale-inhibiting agent used is a combination with a synergistic effect of at least 50% by weight of salified polymers of ethylenic acids, chosen from polymaleates, polyacrylates, polymethacrylates, maleateacrylate copolymers, acrylate-methacrylate copolymers, acrylate-metha-crylate-itaconate terpolymers, and mixtures of these substances, and at most 50 wt.% aliphatic polyamines with the formula wherein R represents an aliphatic radical having 12 to 18 carbon atoms and n can be an odd or even whole number between 1 and 6, the percentages being based on polymers and polyamines in the dry state. These percentages are preferably 5 to 15 wt.% aliphatic polyamines per 95 to 85 wt.% polymers.</p> |
