RUBBER COMPOSITION FOR TIRE TREAD AND MANUFACTURING METHOD THEREOF

An embodiment of the present specification provides a rubber composition for a tire tread, comprising: a rubber polymer; a petroleum resin; and a functionalized processing aid, wherein the functionalized processing aid is a bond of a silane-based compound and a cardanol-derived structure, represented by the following formula 1: (R)Si—R—Z-(E) [Formula 1]