Stable aqueous acid compositions thickened with polyacrylamide

摘要

An acid composition comprising an acid having a pKA value greater than or equal to about 0.5 and a homopolymer less than about 5.0 having the repeating monomeric structure -CH2CH-(CONH2-)-, and water in an amount sufficient to provide the composition a stable viscosity of about 25 - 20,000 centipoise. The polymer of this invention may be utilized at concentration levels much lower than previously thought possible and acts synergistically in the prsence of surfactants to stabilize the viscosity and pH of the thickened acids for extended periods of time.