Rubber composition and process for preparing the same

摘要

A rubber composition improving the reaction efficiency of a silane coupling agent in kneading, suppressing generation of air bubbles, improving processability and abrasion resistance and lowering rolling resistance, and a process for preparing the same are provided. A rubber composition comprising silica, wherein 3 to 15 parts by weight of a silane coupling agent based on 100 parts by weight of silica and 0.3 to 1.45 parts by weight of a potassium salt based on 100 parts by weight of silica are contained.