Patent ID: 8426515

Claim:
A method for preparing an organically modified silica master batch elastomer, comprising: solution polymerizing a conjugated diene monomer with a vinyl aromatic monomer to prepare a copolymer; reacting silica with 1-10 wt % of an organosilane compound represented by Chemical Formula 1 and 1-10 wt % of a silane coupling agent represented by Chemical Formula 2, based on the weight of the silica, to prepare organically surface-modified silica; and mixing 100 parts of the copolymer by weight with 10-150 parts of the organically modified silica by weight in solution phase and then drying to prepare a master batch elastomer: R 1 —Si—(OH) 3 (1) wherein R 1 is a C 2 -C 20 aliphatic hydrocarbon group; and (EtO) 3 Si(CH 2 ) 1 —(S)—(CH 2 ) m Si(OEt) 3 (2) wherein each of 1 and m is independently an integer from 1 to 5, and n is an integer from 1 to 4.