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:
Apr. 15, 2003
Filed:
Apr. 15, 2002
Hiroyuki Kotsuji, Kawasaki, JP;
Akira Tsukada, Kawasaki, JP;
Zeon Corporation, Tokyo, JP;
Abstract
A nitrile group-containing highly saturated copolymer rubber comprising (a) 10-40 wt. % of &agr;,&bgr;-ethylenically unsaturated nitrile monomer units, (b) 10-60 wt. % of &agr;,&bgr;-ethylenically unsaturated carboxylic acid ester monomer units, (c) 0.01-21 wt. % of conjugated diene monomer units, and (d) 14-69.99 wt. % of saturated conjugated diene monomer units, wherein the sum of monomer units (c) plus (d) is 20-70 wt. %, the ratio of monomer units (d)/[monomer units (c) plus (d)] is at least 70 wt. %, and the difference between the extrapolated glass transition-initiating temperature (Tig) and the extrapolated glass transition-ending temperature (Teg), as measured by DSC is not higher than 10° C. The copolymer rubber gives a crosslinked product having good cold resistance, oil resistance and dynamic properties.