STABILIZED COPOLYMER OF ETHYLENE WITH ETHYLENICALLY UNSATURATED CARBOXYLIC ACID

摘要

The viscosity stability of a copolymer of ethylene with at least one comonomer which is an ethylenically unsaturated carboxylic acid is improved by exposing the isolated copolymer to moisture for a sufficient period to cause the copolymer to retain at least 20 weight percent more water than it would retain if it were purged with air or nitrogen heated to a temperature at least 5 DEG C above ambient, which air or nitrogen has not been humidified after it has been heated to such temperature.