Patent ID: 7368506
Filing Date: 2008-05-06
Classification: B60C,C08K,C08L,Y10T

Abstract:
1. A peroxide-crosslinkable rubber composition having a run flat property comprising: (A) more than 60 parts by weight but not more than 95 parts by weight of a rubber component comprising (i) a natural rubber (NR) and (ii) a polybutadiene rubber (BR), and (iii) optionally, at least one rubber selected from the group consisting of a styrene-butadiene copolymer rubber (SBR), an ethylene-propylene rubber (EPM), an ethylene-propylene-diene terpolymer (EPDM), a silicone rubber and a fluororubber, (B) at least 5 parts by weight but less than 40 parts by weight of a polar polymer, which comprises 100 parts by weight of an ethylenically unsaturated nitrile-conjugated diene-based high saturation copolymer rubber having a conjugated diene unit content of 30 wt % or less and 20 to 120 parts by weight of a metal salt of an ethylenically unsaturated carboxylic acid blended therein, and (C) carbon black having a nitrogen specific surface area (N