Method of making synthetic hydrophilic polymers and products resulting therefrom
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United States of America Patent
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Sep 17, 2002
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app pub date -
Apr 19, 2001
filing date -
Sep 30, 1999
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Abstract
The present invention involves a method of making a multiblock copolymer containing two or more types of sequences of derivatives of acrylic acid with at least one derivative being acrylic acid salt and at least one being acrylamide. The method includes: (e) in sequence, a first step being a catalytic reaction of nitrile groups in polyacrylonitrile dissolved in an inorganic aqueous solvent of polyacrylonitrile; and, (f) at least one subsequent step being at least one catalytic reaction of nitrile groups in absence of polyacrylonitrile solvents.The present invention also pertains to the products resulting from the method.
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