Aqueous process for preparing water-soluble addition copolymers of cyclohexene anhydrides
AssigneeRohm and Haas Company
InventorsThomas F. McCallum, III, Barry Weinstein
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Abstract
The present invention provides an aqueous process for preparing water-soluble addition copolymers of containing, as polymerized units: (a) from about 3 to about 95 percent by weight of one or more cyclohexene anhydrides or the alkali metal or ammonium salts thereof, and (b) from about 5 to about 97 percent by weight of one or more monomers C.sub.4 -C.sub.6 monoethylenically unsaturated dicarboxylic acids and the alkali metal and ammonium salts thereof. These copolymers are useful as water-treatment additives for boiler waters and cooling towers and as detergent additives acting as builders, anti-filming agents, dispersants, sequestering agents and encrustation inhibitors.
Claims9
An aqueous process for preparing water-soluble polymers comprising:
- polymerizing a monomer mixture in the presence of water and one or more polymerization initiators at an elevated temperature, wherein the monomer mixture comprises
- (a) from about 3 to about 95 percent by weight of one or more cyclohexene anhydrides or the alkali metal or ammonium salts thereof;
- and
- (b) from about 5 to about 97 percent by weight of one or more monomers selected from the group consisting of C.sub.4 -C.sub.6 monoethylenically unsaturated dicarboxylic acids and the alkali metal and ammonium salts thereof, and the anhydrides of the cis-dicarboxylic acids.
Dependencies are inferred from the claim text.