RUBBER COMPOSITION FOR TIRE TREAD

摘要

PURPOSE:To obtain the titled composition having balanced rolling resistance, sliding friction coefficient to wet road surface and abrasion resistance, by compounding a specific carbon black to a styrene-butadiene random copolymer containing a specific polymer component. CONSTITUTION:The objective composition is produced by compounding a carbon black having an N2SA value/IA value of >=1.1 to a polymer component containing >=20pts.wt. of a styrene-butadiene random copolymer coupled with a 1-2-functional Sn compound (e.g. dimethyldichlorotin) and a >=3-functional compound (e.g. tin tetrachloride), containing >=300ppm of Sn bonded to the polymer and produced by using an organic lithium compound as a polymerization catalyst.