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. 21, 2011
Filed:
Jun. 15, 2007
Dai-seung Choi, Daejeon Metropolitan, KR;
Young-whan Park, Daejeon Metropolitan, KR;
Sung-ho Chun, Daejeon Metropolitan, KR;
Sung Cheol Yoon, Daejeon Metropolitan, KR;
Young-chul Won, Daejeon Metropolitan, KR;
Dai-Seung Choi, Daejeon Metropolitan, KR;
Young-Whan Park, Daejeon Metropolitan, KR;
Sung-Ho Chun, Daejeon Metropolitan, KR;
Sung Cheol Yoon, Daejeon Metropolitan, KR;
Young-Chul Won, Daejeon Metropolitan, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
Disclosed is a method of producing a cyclic olefin polymer having a polar functional group, an olefin polymer produced by using the method, an optical anisotropic film including the olefin polymer, and a catalyst composition for producing the cyclic olefin polymer. In the olefin polymerization method and the catalyst composition for polymerization, since deactivation of the catalyst due to polar functional groups of monomers is capable of being suppressed, it is possible to produce polyolefins having a high molecular weight at high polymerization yield during polyolefin polymerization. Furthermore, the cyclic olefin having the polar functional groups has excellent polymerization reactivity and the activity of the catalyst composition including the same is maintained under a variable polymerization condition. Accordingly, the present invention is very useful for a mass-production process.