Novel amine-containing copolymers and their use

Method of controlling the formation of scale imparting precipitates, and/or the subsequent deposition thereof on the structural parts of a system exposed to an aqueous medium containing scale forming constituents under scale forming conditions, said method comprising adding to said aqueous medium between 0.5 and about 100 parts per million on an actives basis of a water soluble polymer comprising repeat unit moieties (g) and (h) wherein said repeat unit (g) comprises the structure ##STR6## and wherein said repeat unit moiety (h) comprises the structure:

• ##STR7## wherein E in the above formula is acrylic acid, methacrylic acid, or polymerized mixtures thereof, wherein R.sub.1 in the above formula comprises a C1-C6 linear or branched alkylene or hydroxyl substituted alkylene, R.sub.2 and R.sub.3 independently represent hydrogen, C1-C5 lower alkylene or substituted lower alkylene, and M and L, independently represent hydrogen or a water-soluble cation and wherein the mole ratio of repeat units g:h is about 4:1 to about 6:1.