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:
Feb. 24, 2015
Filed:
Dec. 18, 2012
Sumitomo Chemical Company, Limited, Tokyo, JP;
Sadayuki Nakano, Chiba, JP;
Sumitomo Chemical Company, Limited, Tokyo, JP;
Abstract
Provided is an ethylene-α-olefin-nonconjugated polyene copolymer having ethylene units, α-olefin units and nonconjugated polyene units, wherein the copolymer satisfies the following requirements: (A): the intrinsic viscosity [η] is 0.5 to 1.8 dl/g, (B): the content of ethylene units is 50 to 90 mol % and the content of α-olefin units is 50 to 10 mol % where the sum total of the contents of ethylene units and α-olefin units is taken as 100 mol %, (C): the iodine value is 1 to 50, (D): the ratio of tan δ taken at 100° C. and 2 cpm to tan δ taken at 100° C. and 1000 cpm is from 1.0 to 1.7, and (E): the ratio of the Z-average molecular weight to the number average molecular weight is from 15 to 25 and the weight average molecular weight to the number average molecular weight is from 3 to 5.