Processes for preparing rubber blend compositions
US8207247B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 1, 2008 |
| Grant date | Jun 26, 2012 |
| Priority date | — |
| Expiry date | Sep 14, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2421/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Processes for mixing a filler with a rubber blend containing at least one isoprene elastomer and one butadiene elastomer are provided. Preferably, the processes include the steps of: combining elastomers or a blend of elastomers, a carbon black and/or silica filler(s) and a quinone diimine antidegradant in a rubber composition; mixing the rubber composition for a viscosity-reducing effective period of time to reduce the viscosity of the composition; and discharging the mixed composition. The compositions are preferably discharged from the mixing vessel at or near a minimum viscosity occurring at a temperature of about 120-160° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.