Pneumatic tire having a tread containing immiscible rubber blend and silica
US7441572B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2004 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Oct 21, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L9/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention is directed to a pneumatic tire having a tread comprising a vulcanizable rubber composition comprising, expressed as parts by weight per 100 parts by weight of elastomer (phr),(A) 60 to 95 phr of solution-polymerized styrene-butadiene rubber with a bound styrene content of from 35 to 45 percent by weight, a vinyl 1,2 content of from 15 to 30 percent by weight based on the butadiene content, and a Tg of from about −40° C. to about −20° C.;(B) 5 to 40 phr of cis-1,4 polybutadiene having a Tg of from −95° C. to −105° C.(C) 50 to 150 phr of silica;(D) 30 to 70 phr of processing oil; and(E) 0.5 to 20 phr of a sulfur containing organosilicon compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.