Copolymers prepared by reacting an acrylamide or methacrylamide copolymer with formaldehyde and then with an unsaturated carboxylic acid
Abstract
Abstract THE INVENTION PROVIDES A PROCESS FOR THE PREPARATION OF A COPOLYMER CONTAINING PENDANT ETHYLENICALLY UNSATURATED SIDE CHAINS WHICH COMPRISES REACTING A COPOLYMER OF ACRYLAMIDE OR METHACRYLAMIDE WITH FORMALDEHYDE AND REACTING THE RESULTANT PRODUCT WITH ETHYLENICALLY UNSATURATED MONOCARBOXYLIC ACID, E.G. ACRYLIC OR METHACRYLIC ACID OR HYDROXYALKYL ESTER OR HYDROXYCYCLOALKYL ESTER THEREOF. THE RESULTANT COPOLYMER MAY BE DEFINED AS CONTAINING REPEATING UNITS DERIVED FROM ONE OR MORE ETHYLENICALLY UNSATURATED MONOMERS AND REEPATING UNITS OF THE FORMULA: -CH2-C(-R1)(-CO-NH-CH2-(O-R2)N-O-AC)- IN WHICH R1 IS A HYDROGEN ATOM OR A METHYL GROUP: R2 IS A DIVALENT ALKYLENE OR CYCLOALKYLENE GROUP; AC IS THE ACYL RESIDUE OF AN ETHYLENICALLY UNSATURATED MONOCARBOXYLIC ACID; AND N IS 0 OR 1.
Inventors
- 👤 A Hudson
- 👤 Hara K O
Bibliographic Details
Claims Analysis
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