Rubber composition for tire treads
US6489389B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1999 |
| Grant date | Dec 3, 2002 |
| Priority date | — |
| Expiry date | Jan 28, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K7/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Rubber compositions for tire treads containing a rubber component containing at least 70 parts by weight of a styrene-butadiene rubber whose styrene content is 20 to 60%; 5 to 150 parts by weight of a powdery inorganic compound represented by formula (I) and having a particle size from 0.01 to 10 &mgr;m:mM1•xSiOy•zH2O  (I)in which M1 is at least one of Al, Mg, Ti, and Ca, or hydroxides or oxides thereof; and 5 to 170 parts by weight of carbon black having a nitrogen adsorption specific area of 80 to 280 m2/g and the total amount of the powdery inorganic compound and the carbon black is from 70 to 200 parts by weight. The amount of an extract obtained when extracting the rubber composition, after being vulcanized, with acetone and chloroform should be 30 to 270 parts by weight. Similar compositions containing silica are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.