Patent ID: 6653387
Filing Date: 2003-11-25
Classification: C08K

Abstract:
A tire which contains at least one component of a rubber composition comprised of, based on parts by weight per 100 parts by weight rubber (phr):(A) at least one diene hydrocarbon based elastomer, (B) about 25 to about 100 phr of particulate reinforcing filler comprised of (1) about 25 to about 100 phr of particulate alumina as an aluminum oxide hydroxide, which contains hydroxyl groups on its surface, comprised of the general formula (I): Al2O3Â·xH2Oâ€ƒâ€ƒ(I) â€ƒwhere x represents a degree of water association with said aluminum oxide in a range of zero to about 3, and, correspondingly,(2) from zero to about 30 phr of rubber reinforcing particulate carbon black and/or aggregates of precipitated silica, and (C) about 0.01 to about 10 phr of a coupling agent for said alumina selected from tetrathiodipronionic acid and/or trithiodinropionic acid; wherein said coupling agent and said alumina are mixed with said elastomer(s), according to one or more of the following: (1) mixing said tetrathiodipropionic acid and/or trithiodipropionic acid together with said particulate alumina in said elastomer(s), or (2) pre-reacting said tetrathiodipropionic acid and/or trithiodipropionic acid with said particulate alumina to form an alumina composite thereof and thereafter mixing said alumina composite with said elastomer(s).