Patent ID: 6121346
Filing Date: 2000-09-19
Classification: B60C,C08K

Abstract:
A method of processing a rubber composition containing a filler comprising mixing(a) 100 parts by weight of at least one rubber containing olefinic unsaturation; and(b) 1 to 250 phr of a filler having individual aggregates containing both large and small particles wherein(1) the small particles range from 1 to 30 weight percent of the overall weight percent of said filler and the particle size of such small particles range from 1 to 16 nanometers in diameter;(2) the large particles range from 70 to 99 weight percent of the overall weight percent of said filler and the particle size of such large particles, range from 17 to 500 nanometers in diameter; and(3) the small particles are grafted onto the surface of the large particles.