Patent ID: 8662125
Filing Date: 2014-03-04
Classification: C08F,C08L,Y10S,Y10T

Abstract:
1. A tire which is comprised of a generally toroidal-shaped carcass with an outer circumferential tread, two spaced beads, at least one ply extending from bead to bead and sidewalls extending radially from and connecting said tread to said beads, wherein said tread is adapted to be ground-contacting, and wherein said tread is comprised of (1) a filler, (2) a cured rubbery polymer, and (3) core-shell particles which are consisting essentially of (a) a crosslinked elastomeric core consisting of repeat units that are derived from isoprene monomer and from 15 weight percent to 30 weight percent divinyl benzene, based upon the weight of the crosslinked elastomeric core, wherein the crosslinked elastomeric core is a polymeric composition having a glass transition temperature which is within the range of −20° C. to 20° C., and (b) a polymeric shell which is derived from styrene monomer, wherein the polymeric shell has a glass transition temperature which is within the range of 50° C. to 160° C., wherein the glass transition temperature of the elastomeric core differs from the glass transition temperature of the polymeric shell by at least 30° C., and wherein the weight ratio of the core to the shell is within the range of 20:1 to 7:1.