Rubber compositions with granules of sulfur, oil and methylstyrene
US4775724A · kind A · utility
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1References
1Claims
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Key dates
| Filing date | Apr 10, 1987 |
| Grant date | Oct 4, 1988 |
| Priority date | — |
| Expiry date | Apr 10, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K9/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A rubber composition contains granules of two-layer structure composed of insoluble sulfur powder treated with .alpha.-methylstyrene and a process oil as a vulcanizing agent. In this case, the content of process oil in the inner layer portion of the granule is larger than that in the outer layer portion thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.