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:
Aug. 11, 1992
Filed:
Apr. 19, 1991
Applicant:
Inventors:
Suguru Tsuji, Tokyo, JP;
Hiromi Numata, Kawasaki, JP;
Assignee:
Nippon Zeon Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
5263401 ; 526 88 ; 526341 ; 526335 ;
Abstract
An unsaturated nitrile/conjugated diene copolymer rubber is prepared by an aqueous suspension polymerization of a monomer mixture of a conjugated diene monomer, a nitrile group-containing unsaturated monomer and an optional copolymerizable monomer. The suspension polymerization is carried out in an aqueous medium in a reactor provided with an agitating element under the following conditions: