Patent ID: 8293674

Claim:
A catalyst system for preparing a cyclic olefin addition polymer, 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, wherein said a) the Group X transition metal compound is represented by the following Chemical Formula 1: M(R) 2 [Chemical Formula 1] wherein M is a Group X metal; and R is an anionic ligand of acetylacetonate (R″C(O)CHC(O)R″), or acetate group offering σ- and π-bonds, wherein each of R″ is hydrogen; C 1 to C 20 linear or branched alkyl; C 2 to C 20 linear or branched alkenyl, or vinyl; C 5 to C 12 cycloalkyl substituted with hydrocarbon or unsubstituted; C 6 to C 40 aryl substituted with hydrocarbon or unsubstituted; C 6 to C 40 aryl having hetero atom; C 7 to C 15 aralkyl substituted with hydrocarbon or unsubstituted; or C 3 to C 20 alkynyl.