METHOD OF STABILIZING WATER SOLUTION OF POLYACRYLAMIDE OR PARTIALLY HYDROLIZED POLYCRYLAMIDE,OR ACRYLAMIDE COPOLYMER WITH METHACRYLIC ACID

摘要

2-Mercaptobenzoimidazole or its water-soluble salt is added to a water-soluble acrylamide polymer containing a predominant amount of acrylamide in the molecule to inhibit degradation, especially at high temperatures, in a petroleum recovery process.