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. 02, 2011
Filed:
Nov. 09, 2007
Sung-ho Chun, Daejeon, KR;
Won-kook Kim, Daejeon, KR;
Sung-cheol Yoon, Daejeon, KR;
Tae-sun Lim, Daejeon, KR;
Heon Kim, Daejeon, KR;
Kyoung-hoon Kim, Daejeon, KR;
Sung-Ho Chun, Daejeon, KR;
Won-Kook Kim, Daejeon, KR;
Sung-Cheol Yoon, Daejeon, KR;
Tae-Sun Lim, Daejeon, KR;
Heon Kim, Daejeon, KR;
Kyoung-Hoon Kim, Daejeon, KR;
LG Chem, Ltd., , KR;
Abstract
The present invention relates to a catalyst system for preparing a cyclic olefin addition polymer, a method for preparing the catalyst system and a cyclic olefin addition polymer prepared by the method, and more particularly to the method comprising the steps of contacting some content of norbornene-based monomer having a specific polar functional group with a catalyst system comprising a) a Group X transition metal compound; b) a compound comprising a neutral Group XV electron donor ligand having a cone angle of at least 160°; and c) a salt capable of offering an anion that can be weakly coordinated to the transition metal of the a) the Group X transition metal compound.