Water soluble terpolymers and methods of use thereof

Details Water soluble terpolymers and methods of use thereof Water soluble terpolymers and methods of use thereof

1992-02-07

1992-12-08

Hruskoci, Peter

Liquid purification or separation

Processes

Preventing, decreasing, or delaying precipitation,...

252180, C02F 512

Patent

active

051695375

ABSTRACT:
A water soluble terpolymer useful in controlling deposition of scale in aqueous systems comprised of monomeric repeat units (g), (h) and (i) wherein repeat unit (g) comprises the structure ##STR1## wherein E is the repeat unit obtained after polymerization of an .alpha.,.beta. ethylenically unsaturated compound, wherein repeat unit (h) comprises the structure ##STR2## wherein R.sub.1 and R.sub.2 are the same or different and denote H, methyl or ethyl and M is a water soluble cation or H, and wherein repeat unit (i) comprises the structure ##STR3## wherein R.sub.3 is a lower alkyl (C.sub.1 -C.sub.3), R.sub.4 is a hydroxy substituted alkyl or alkylene group having from 1 to about 6 carbon atoms or a non-substituted alkyl or alkylene group having from 1 to about 6 carbon atoms, X is an anionic radical, Z is H, hydrogen atoms or a water soluble cation or cations which together counterbalance the valance of X and a is 0 or 1.

REFERENCES:
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patent: 4931188 (1990-06-01), Chen
patent: 4933090 (1990-06-01), Gill et al.
patent: 4944885 (1990-07-01), Chen
Chemical Abstract 98:221593W.

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