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:
Nov. 17, 1998
Filed:
Aug. 21, 1997
Toshihiro Sagane, Tokyo, JP;
Masaaki Kawasaki, Ichihara, JP;
Hidenari Nakahama, Ichihara, JP;
Tatsuyoshi Ishida, Kuga-gun, JP;
Katsuya Takahashi, Ichihara, JP;
Toshiyuki Tsutsui, Kuga-gun, JP;
Hitoshi Onishi, Kuga-gun, JP;
Masaaki Yasuda, Kuga-gun, JP;
Noriaki Kihara, Kuga-gun, JP;
Mitsui Petrochemical Industries, Ltd., Tokyo, JP;
Abstract
A novel unsaturated copolymer of ethylene comprises a random copolymer of (i) ethylene, (ii) an .alpha.-olefin of 3 to 20 carbon atoms and (iii) at least one straight chain or branched chain nonconjugated triene or tetraene having one vinyl group in the molecule, which contains 30-92% by mol of ethylene units (i), 6-70% by mol of .alpha.-olefin units (ii) and 0.1-30% by mol of triene or tetraene units (iii), and which has a molar ratio of ethylene units (i) to .alpha.-olefin units (ii) of 40/60 to 92/8 (ethylene units (i)/.alpha.-olefin units (ii)) and an intrinsic viscosity (.eta.), measured in Decalin at 135.degree. C., of 0.05 to 10 dl/g. This novel unsaturated copolymer of ethylene is excellent in weathering resistance, heat resistance and ozone resistance and has a high vulcanizing rate.