Terpolymers of acrylamide, alkylacrylamide and betaine monomers

摘要

A water or brine soluble terpolymer having the structure: <IMAGE> wherein X is selected from the group consisting of <IMAGE> <IMAGE> and <IMAGE> wherein x is about 1 to about 95 mole percent; y is about 0.1 to about 5.0 mole percent; R1 is methyl or hydrogen; z is 1 to 29 mole percent; R2 is an alkyl group of 1-5 carbon atoms; R3 is an alkyl group of 3 to 4 carbon atoms; R4 is an alkyl group of 1-5 carbon atoms; and R5 is an alkyl group of 4-20.