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. 18, 1994
Filed:
Oct. 30, 1991
Applicant:
Inventors:
Masayoshi Ichikawa, Inazawa, JP;
Kiyomitsu Terashima, Inazawa, JP;
Assignee:
Toyoda Gosei Co., Ltd., Nishikasugai, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29D / ; B29D / ;
U.S. Cl.
CPC ...
428 368 ; 428 3691 ; 428 3692 ;
Abstract
An ethylene-propylene rubber composition vulcanizable with sulfur in which the rubber component totally or mainly composed of EPDM is incorporated with a zinc oxide, a carbon black, and other ingredients. The EPDM has an iodine value of 20 to 35 and an active zinc oxide is incorporated therein as the zinc oxide in an amount of 1 to 10 PHR. Even with a sulfur vulcanization system, this ethylene-propylene rubber composition is permitted to have compression set resistance equivalent to that of conventional SBR and is improved in heat resistance as well.