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US 5,292,793 AGranted
Hydrophobic polyelectrolytes used in color removal
AssigneeNalco Chemical Company
InventorsManian Ramesh, Chandrashekar S. Shetty, Martha R. Finck
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Abstract
A hydrophobic polyelectrolyte copolymer which is useful in the removal of color in paper mill waste water. The copolymer preferably comprises an acrylamide and a hydrophobic monomer selected from the group consisting of quaternized dimethylaminoethylacrylates and quaternized dimethylaminoethylmethacrylates.
Claims8
A color removal agent which consists essentially of a hydrophobic polyelectrolyte copolymer, said hydrophobic polyelectrolyte copolymer consisting of an acrylamide, a hydrophobic monomer selected from the group consisting of:
- dimethylaminoethylacrylates having C8 to C20 quaternaries and dimethylaminoethylmethacrylates having C8 to C20 quaternaries, water and a polymer initiator.
Dependencies are inferred from the claim text.