Blend of EPDM and SBR using an EPDM of different origin as a compatibilizer
US6800691B2 · kind B2 · utility
7Cited by
7References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 26, 2001 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Oct 2, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/03
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polymer blend of an ethylene-&agr;-olefin-diene rubber and a conjugated diene rubber suitable for use as a replacement for unblended EPDM rubber in automotive applications. The rubber blends of the present invention comprise a high molecular weight EPDM rubber, a conjugated diene rubber, and a low molecular weight, high ethylene content EPDM rubber that functions as a compatibilizer. The resultant blend exhibits physical properties, including tensile and tear strength, that are comparable to conventional EPDM rubbers, while maintaining the excellent heat and weather resistance possessed by EPDM rubbers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.