V-ribbed belt and use thereof
US12085143B2 · kind B2 · utility
0Cited by
3References
9Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 14, 2019 |
| Grant date | Sep 10, 2024 |
| Priority date | — |
| Expiry date | Jun 5, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2201/014
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A V-ribbed belt in which a friction transmission surface of a compression rubber layer is coated with a knit fabric is provided. The compression rubber layer is formed of the cured product of a rubber composition containing an ethylene-α-olefin elastomer and carbon black wherein the carbon black contains a soft carbon having a primary particle diameter of at least 40 nm and a hard carbon having a primary particle diameter of less than 40 nm. The ratio between the number of particles of the soft carbon and hard carbon is former/latter=3/97 to 25/75.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.