Tire with stratified tread composite
US9518158B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2015 |
| Grant date | Dec 13, 2016 |
| Priority date | — |
| Expiry date | Jul 7, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2407/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a pneumatic rubber truck tire having a circumferential stratified dual cap rubber tread comprised of an outer tread cap and underlying tread sub cap. The underlying tread sub cap rubber layer is provided to support the outer tread cap rubber layer with similar physical properties. Both of the tread cap rubber compositions are comprised of a combination of natural cis 1,4-polyisoprene and dual cis 1,4-polybutadiene elastomers and contain reinforcing fillers comprised of precipitated silica and rubber reinforcing carbon black. The tread cap rubber compositions differ from each other by containing different levels of the individual cis 1,4-polybutadiene rubbers and by containing different rubber reinforcing carbon blacks and precipitated silica.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.