quaternary ammonium anti-static agent of the formula [R1 R2 R3 R4 N]+n Xn- wherein R1 and R2 represent hydrocarbyl groups containing from about 10 to 22 carbon atoms, R3 and R4 represent hydrocarbyl groups containing from about 1 to 4 carbon atoms, X is an anion and n is an integer from 1 to 3.