Patent ID: 6641754
Filing Date: 2003-11-04
Classification: C02F,C08F,C23F

Abstract:
A method of inhibiting the formation and deposition of scale imparting species on surfaces exposed to an aqueous system comprising adding to said aqueous system an effective amount for the purpose of a water-soluble or water-dispersible polymer of the formula: wherein E is the repeat unit remaining after polymerization of an ethylenically unsaturated compound; R1 is H or lower (C1-C4)alkyl; G is â€”CH2â€” or â€”CHCH3â€”; R2 is &Parenopenst;CH2â€”CH2â€”O&Parenclosest;n or &Parenopenst;CH2â€”CHCH3â€”O&Parenclosest;n;wherein n ranges from about 1 to 100; X is SO3, PO3 or COO; Z is H, hydrogens, or a water-soluble cationic moiety; F is a repeat unit of the formula: â€ƒwherein R4 is H or lower (C1-C4)alkyl, R5 is hydroxy substituted alkyl or alkylene having from 1 to 6 carbon atoms; c and d are positive integers; and e is a non-negative integer.