MODIFIED RUBBER MASTERBATCH, RUBBER COMPOSITION PREPARED THEREWITH AND VULCANIZED RUBBER AND PREPARATION METHOD THEREOF

摘要

A modified rubber masterbatch and preparation method thereof, rubber composition prepared therewith and vulcanized rubber and preparation method thereof, the modified rubber components comprising uncross-linked rubber and cross-linked rubber particles dispersed therein; the cross-linked rubber particles are synthetic rubber particles and/or natural rubber particles, with an average particle diameter of 20-500nm, and gel content of 60% by weight or above; the uncross-linked rubber is styrene butadiene rubber; and the weight ratio between the cross-linked rubber particles and the uncross-linked rubber is greater than 20:80 and less than or equal to 80:20. The rubber composition comprises a blend of modified rubber components and base rubber, with the base rubber 100 parts by weight and the modified rubber components 1-70 parts by weight. The vulcanized rubber of the rubber composition has low rolling resistance, excellent wet-skid resistance and excellent wear resistance, and can be used to prepare high performance tread rubber for automobiles.