Anionic polymers containing 3-acrylamido-3-methylbutanoic acid as scale inhibitors for preventing or reducing calcium phosphate and other scales
AssigneeNalco Chemical Company
InventorsJames F. Kneller, Donald A. Johnson
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Abstract
A method for preventing calcium phosphate and calcium carbonate scales in industrial cooling waters which comprises treating such waters with a few parts per million of a water-soluble acrylic acid copolymer which contains from 10-80 mole percent of 3-acrylamido-3-methyl butanoic acid, said polymer having a molecular weight within the range of 5-100,000.
Claims2
A method for preventing calcium phosphate and calcium carbonate scales in industrial cooling waters which comprises treating such waters with a few parts per million of a water-soluble acrylic acid copolymer which contains from 10-80 mole percent of 3-acrylamido-3-methylbutanoic acid, said polymer having a molecular weight within the range of 5-100,000.
Dependencies are inferred from the claim text.