Patent ID: 7648937

Claim:
A catalyst system for producing cyclic olefin polymers having polar functional groups, the catalyst system comprising: i) a procatalyst represented by formula (1) containing a group 10 metal and a ligand containing hetero atoms bonded to the metal; ii) a cocatalyst represented by formula (2) including a salt compound which is capable of providing a phosphonium cation and an anion weakly coordinating to the metal of the procatalyst: where X is a hetero atom selected from S, O and N; R 1 is —CH═CHR 20 , —OR 20 , —SR 20 , —N(R 20 ) 2 , —N═NR 20 , —P(R 20 ) 2 , —C(O)R 20 , —C(R 20 )═NR 20 , —C(O)OR 20 , —OC(O)OR 20 , —OC(O)R 20 , —C(R 20 )═CHC(O)R 20 , —R 21 C(O)R 20 , —R 21 C(O)OR 20 or —R 21 OC(O)R 20 , where R 20 is a hydrogen, a halogen, a linear or branched C 1-5 alkyl, a linear or branched C 1-5 haloalkyl, a linear or branched C 5-10 cycloalkyl, a linear or branched C 2-5 alkenyl, a linear or branched C 2-5 haloalkenyl, or an optionally substituted C 7-24 aralkyl, and R 21 is a C 1-20 hydrocarbylene; R 2 is a linear or branched C 1-20 alkyl, alkenyl or vinyl; a C 5-12 cycloalkyl optionally substituted by a hydrocarbon; a C 6-40 aryl optionally substituted by a hydrocarbon; a C 7-15 aralkyl optionally substituted by a hydrocarbon; or C 3-20 alkynyl; M is a group 10 metal; and p is an integer from 0 to 2, and [(R 3 )—P(R 4 ) a (R 4′ ) b [Z(R 5 ) d ] c ][Ani] (2) where each of a, b and c is an integer from 0 to 3, and a+b+c=3; Z is O, S, Si or N; d is 1 when Z is O or S, d is 2 when Z is N, and d is 3 when Z is Si; R 3 is a hydrogen, an alkyl, or an aryl; each of R 4 , R 4′ and R 5 is a hydrogen; a linear or branched C 1-20 alkyl, alkoxy, allyl, alkenyl or vinyl; a C 3-12 cycloalkyl optionally substituted by a hydrocarbon; a C 6-40 aryl optionally substituted by a hydrocarbon; a C 7-15 aralkyl optionally substituted by a hydrocarbon; a C 3-20 alkynyl; a tri(linear or branched C 1-10 alkyl)silyl; a tri(linear or branched C 1-10 alkoxy)silyl; a tri(optionally substituted C 3-12 cycloalkyl)silyl; a tri(optionally substituted C 6-40 aryl)silyl; a tri(optionally substituted C 6-40 aryloxy)silyl; a tri(linear or branched C 1-10 alkyl)siloxy; a tri(optionally substituted C 3-12 cycloalkyl)siloxy; or a tri(optionally substituted C 6-40 aryl)siloxy, in which each substituent is a halogen or C 1-20 haloalkyl; and [Ani] is an anion capable of weakly coordinating to the metal M of the procatalyst represented by formula (1) and is selected from the group consisting of borate, aluminate, [SbF 6 ]—, [PF 6 ]—, [AsF 6 ]—, perfluoroacetate([CF 3 CO 2 ]—), perfluoropropionate([C 2 F 5 CO 2 ]—), perfluorobutyrate([CF 3 CF 2 CF 2 CO 2 ]—), perchlorate([ClO 4 ]—), p-toluenesulfonate([p-CH 3 C 6 H 4 SO 3 ]—), [SO 3 CF 3 ]—, boratabenzene, and carborane optionally substituted with a halogen.