Patent ID: 6121367
Filing Date: 2000-09-19
Classification: C08J,C08K

Abstract:
A process for the production of a heterogeneous silica/carbon black-filled rubber compound comprising(a) intimately dispersing from 30 to 60 phr of a silica filler and 5 to 80 phr of a carbon black in a first rubber to form a first nonproductive compound;(b) intimately dispersing curatives in said first nonproductive compound to form a first productive compound;(c) separately and intimately dispersing from 20 to 100 phr of a silica filler in a second rubber, which is different from said first rubber to form a second nonproductive compound;(d) intimately dispersing curatives in said second nonproductive compound to form a second productive compound; and(e) mixing said first productive compound with said second productive compound to form a heterogeneous silica/carbon black-filled rubber compound.