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:
Jun. 02, 2009
Filed:
Apr. 27, 2004
Yoshikazu Miyamoto, Tokyo, JP;
Nobuyuki Miyaki, Tokyo, JP;
Kohei Goto, Tokyo, JP;
Yuichi Hashiguchi, Tokyo, JP;
Yoshikazu Miyamoto, Tokyo, JP;
Nobuyuki Miyaki, Tokyo, JP;
Kohei Goto, Tokyo, JP;
Yuichi Hashiguchi, Tokyo, JP;
JSR Corporation, Tokyo, JP;
Abstract
The norbornene derivative of the present invention is represented by the following formula (Im). According to the present invention, a novel norbornene derivative that is useful as a precursor monomer for preparing a cycloolefin polymer exhibiting excellent transparency, heat resistance and low-water absorption properties and having been freely controlled in the birefringence properties and the wavelength dispersion properties can be provided. According to the present invention, further, a norbornene ring-opened (co)polymer having excellent transparency and heat resistance, exhibiting high solubility in organic solvents and having specific birefringence properties and wavelength dependence, and a process for preparing the ring-opened (co)polymer can be provided.