STABILIZATION OF DILUTE AQUEOUS SOLUTIONS OF HIGH MOLECULAR WEIGHT HOMOPOLYMERS AND COPOLYMERS BASED ON WATER-SOLUBLE ETHYLENICALLY UNSATURATED COMPOUNDS

摘要

Dilute aqueous solutions of high molecular weight polymers of acrylamide or methacrylamide or of homopolymers or copolymers of salts of ethylenically unsaturated C3-C5-carboxylic acids are stabilized to thermal degradation by adding (a) at least 20 ppm of an inorganic sulfur compound, in which the sulfur has an oxidation number of +2 to +5, and (b) at least 20 ppm of a complexing agent for metal ions.