Drag reduction agent
 The present invention relates to drag reduction agents for water which are diblock polymers of t-butylstyrene/metal styrene sulfonate and triblock polymers of t-butylstyrene/metal styrene sulfonate/t-butylstyrene. 
Exxon Research and Engineering Co.
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inventional inventional additional
Paul L. Jan Ralph M.
Valint Bock Kowalik