The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 05, 2004
Filed:
Sep. 26, 2001
Applicant:
Inventor:
Hans-Joachim Graf, Stratford, CA;
Assignee:
Cooper Technology Services, LLC, Findlay, OH (US);
Primary Examiner:
Int. Cl.
CPC ...
C08F 8/00 ; C08L 9/00 ; C08L 2/300 ; C08L 2/304 ; C08L 2/502 ;
U.S. Cl.
CPC ...
C08F 8/00 ; C08L 9/00 ; C08L 2/300 ; C08L 2/304 ; C08L 2/502 ;
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.