Rubber composition for tires and pneumatic tire
US6472461B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2000 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Apr 28, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L9/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A rubber composition includes a rubber component, a polyethylene short fiber, and a blowing agent. The rubber component has a polybutadiene and at least one natural rubber or synthetic diene rubber. The polybutadiene has a weight-average molecular weight of 5,000 to 30,000 obtained as a weight-average molecular weight corresponding to polystyrene and further has a content of a cis-1,4 structure of 60 to 98%. The rubber component is 6% by weight or more polybutadiene. The short fiber has an average length of 10 mm or shorter. A pneumatic tire includes the rubber composition and exhibits excellent braking ability on ice, excellent braking ability on wet road surfaces, and improved driving stability in the early driving period. The pneumatic tire exhibits remarkable improvement in braking ability on ice even after a base rubber is exposed by abrasion of a tread rubber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.