abstract |
A method for reducing the frictional drag of an aqueous solution flowing through a pipe, tube or conduit having a continuous flow therethrough, which comprises the step of adding about 0.001 to about 0.1 wt. % of a copolymer to said aqueous solution, wherein said copolymer has the structure: <IMAGE> wherein x is about 40 to about 99 mole % and y is about 1 to about 60 mole %. |