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:
Jan. 15, 1991
Filed:
Dec. 22, 1989
Showa Denko K.K., Tokyo, JP;
Abstract
A thermoplastic elastomer with well-balanced physical properties is prepared by treating a rubber/resin composition comprised of (a) 45-90 wt. parts of a rubbery component and (b) 10-55 wt. parts of a polyolefin resin, with a curing agent. The rubbery component (a) is comprised of 5-100 wt. % of an ethylene-propylene copolymer rubber having an ethylene content of 60-78 mole %, a crystallinity of 4 to 20%, a maximum peak temperature of melting of at least 100.degree. C., an MFI of less than 0.01 at 230.degree. C., an HLMFI/MFI of at least 35, an Mw/Mn of at least 4, and a tensile strength at break of at least 100 kg/cm.sup.2, and 95-0% by weight of an ethylene-propylene-nonconjugated diene copolymer. The rubbery component in the cured product has a gel content more than 80 wt. % and less than 97 wt. % as determined by immersion in cyclohexane at 23.degree. C. for 48 hours.