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. 26, 2012
Filed:
Jun. 26, 2007
Dai-seung Choi, Daejeon, KR;
Hye-young Jung, Daejeon, KR;
Sung-don Hong, Daejeon, KR;
Jung-min Lee, Daejeon, KR;
Hee-jean Lee, Daejeon, KR;
Sung-ho Chun, Daejeon, KR;
Dai-Seung Choi, Daejeon, KR;
Hye-Young Jung, Daejeon, KR;
Sung-Don Hong, Daejeon, KR;
Jung-Min Lee, Daejeon, KR;
Hee-Jean Lee, Daejeon, KR;
Sung-Ho Chun, Daejeon, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
Disclosed is a method for producing a norbornene monomer composition, a norbornene polymer produced using the norbornene monomer composition, an optical film including the norbornene polymer, and a method for producing the norbornene polymer. The method includes reacting a reaction solution that contains cyclopentadiene, dicyclopentadiene, or a mixture of cyclopentadiene and dicyclopentadiene, an acetate compound, and a solvent so that a content of an exo isomer is 50 mol % or more. Variables such as a reaction temperature, a reaction time, a molar ratio between reactants, and addition of a solvent are controlled so that the exo isomer is contained in content of 50 mol % or more. Accordingly, it is possible to industrially produce an acetate norbornene addition polymer by using the acetate norbornene monomer composition containing the exo isomer in content of 50 mol % or more.