Patent ID: 6964940

Claim:
A method of preparing a quaternized amidoamine surfactant of formula wherein R 1 is selected from the group consisting of C 12 –C 30 alkyl, C 12 –C 30 alkenyl, C 12 –C 30 arylalkyl and C 12 –C 30 cycloalkylalkyl, R 2 and R 3 are independently selected at each occurrence from hydrogen or C 1 –C 4 alkyl, R 4 and R 5 are independently selected from C 1 –C 4 alkyl, C 1 –C 4 alkoxyalkyl and C 1 –C 4 hydroxyalkyl, X is halide; and n is an integer from 1 to about 10 comprising reacting an amidotertiaryamine of formula with methyl halide and alkylene oxide.