Rubber compositions containing fillers having aggregates containing different particle sizes

摘要

A rubber composition containing a filler having individual aggregates containing both large and small particles, where the small particles are grafted onto the surface of the large particles. The small particles range from 1 to 30 weight percent of the overall weight of the filler. The large particles range from 70 to 99 weight percent of the overall weight of the filler. The small particles range in size of from 1 to 16 nanometers in diameter and the large particles range in size of from 17 to 500 nanometers in diameter.