摘要 |
<p>The subject invention discloses a pneumatic tire having an outer circumferential tread wherein said tread is a sulfur-cured rubber composition comprised of (a) an isoprene-butadiene diblock rubber, said isoprene-butadiene diblock rubber being comprised of a butadiene block and an isoprene-butadiene block, wherein said butadiene block has a number average molecular weight which is within the range of about 25,000 to about 350,000, wherein said isoprenebutadiene block has a number average molecular weight which is within the range of about 25,000 to about 350,000, wherein said isoprene-butadiene diblock rubber has essentially one glass transition temperature which is within the range of about -100.degree.C to about -70.degree.C, wherein said isoprene-butadiene diblock polymer has a Mooney ML-4 viscosity at 100.degree.C which is within the range of about 50 to about 140, and wherein the repeat units derived from isoprene and 1,3-butadiene in the isoprene-butadiene block are in essentially random order; and (b) a second rubber selected from the group consisting of high vinyl polybutadiene rubber, styrene-isoprene-butadiene rubber, solution styrene-butadiene rubber and emulsion styrene-butadiene rubber.</p> |
申请人 |
GOODYEAR TIRE & RUBBER COMPANY (THE) |
发明人 |
ZANZIG, DAVID JOHN;HALASA, ADEL FARHAN;HSU, WEN-LIANG;SANDSTROM, PAUL HARRY;AUSTIN, LAURIE ELIZABETH |