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. 28, 1990
Filed:
Sep. 12, 1988
Applicant:
Inventors:
Assignee:
Nippon Zeon Co., Ltd., Tokyo, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C / ; C08F / ;
U.S. Cl.
CPC ...
264 406 ; 264237 ; 2643282 ; 2643286 ; 26432816 ; 26432617 ; 26432818 ; 26433112 ; 26433113 ; 26433115 ; 26433117 ; 525290 ; 526283 ;
Abstract
Process for preparing a pore-free polynorbornene product by bulk polymerizing a monomer charge containing at least one norbornene monomer having tricyclic or higher cyclic structure with a metathesis catalyst by controlling maximum exotherm temperature to a level of 160.degree. C. or below or by controlling the temperature difference to 80.degree. C. or below between the inner and exterior temperatures during the cooling period of said product from the maximum exotherm to the glass transition temperature of said product.