Carbon black pair with different particle size and improved rubber stock
US5430087A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1993 |
| Grant date | Jul 4, 1995 |
| Priority date | — |
| Expiry date | Sep 2, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A carbon black system for manufacturing rubber comprises a pair of carbon blacks having the same structure, a fumed silica and a silane coupler. One of the pairs of carbon blacks has an Iodine Adsorption No. of less than 115 and the other pair of carbon blacks has an Iodine Adsorption No. of greater than 115. A rubber composition comprises a rubber selected from a group of polar and nonpolar rubbers, a carbon black system comprising a pair of furnace carbon blacks with both of the pairs of carbon blacks having the same structure, a fumed silica and silane coupler. One of the pairs of carbon blacks has an Iodine Adsorption No. of less than 115 and the other pair has an Iodine Adsorption No. of greater than 115. The carbon black system is from about 40 parts per hundred to about 80 parts per hundred of the rubber. The ratio of either pair of carbon blacks to the other in the rubber does not exceed 3:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.