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:
Sep. 29, 2009
Filed:
Nov. 09, 2005
Sung Cheol Yoon, Daejeon, KR;
Sung Ho Chun, Daejeon, KR;
Heon Kim, Yeosu, KR;
Tae Sun Lim, Daejeon, KR;
Jung Min Lee, Gumi, KR;
Sung Cheol Yoon, Daejeon, KR;
Sung Ho Chun, Daejeon, KR;
Heon Kim, Yeosu, KR;
Tae Sun Lim, Daejeon, KR;
Jung Min Lee, Gumi, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
A method of copolymerizing cyclic olefins and polar vinyl olefins, a copolymer produced by the method, and an optical anisotropic film including the copolymer are provided. According to the copolymerization method, a cyclic olefin and a polar vinyl olefin can be effectively copolymerized using a catalyst system composed of a compound containing a group 13 element and a radical initiator. The resulting copolymer is transparent, and has high adhesion, thermal stability, optical anisotropy and strength, and a low dielectric constant. The optical film including the copolymer can be used as a plastic lens, a polarizer protective film, an adhesive film, and a compensation film, and in a LCD display.