Patent ID: 6433113
Filing Date: 2002-08-13
Classification: C08G,Y10S

Abstract:
A polymerization system for the metathesis polymerization of a cycloolefin monomer, comprising:(a) MoOX2L2 as a catalyst, wherein the catalyst is at least one represented by the formula â€ƒwherein (1) both of the X groups are the same halogen atom selected from the group consisting of Cl and Br, and both of the L groups are the same halogen atom as X; or (2) both of the X groups are the same halogen atom selected from the group consisting of Cl and Br, and both of the L groups are the same straight chain or branched alkyl group having 1-4 carbon atoms; or (3) both of the X groups are the same halogen atom selected from the group consisting of Cl and Br, and both of the L groups are the same straight chain or branched alkoxy group having 1-4 carbon atoms; or (4) both of the X groups are the same alkyl group having 1-4 carbon atoms, and both of the L groups are the same alkoxy group having 1-4 carbon atoms; or (5) one X group is a halogen atom selected from the group consisting of Cl and Br, and the other X group together with both of the L groups constitute a tridentate ligand; or (6) one X group is a straight chain or branched alkoxy group having 1-4 carbon atoms, and the other X group together with both of the L groups constitute a tridentate ligand; (b) a Lewis acid as a co-catalyst, wherein the Lewis acid is at least one selected from the group consisting of an alkyl aluminum compound, an alkoxy aluminum compound, a dialkyl-halo aluminum compound, and a dihalo-alkyl aluminum compound, wherein the alkyl group and the alkoxy group have 1-6 carbon atoms and the halogen is selected from the group consisting of Cl and Br; (c) at least one chain transfer agent; and (d) at least one cycloolefin monomer; wherein the molar ratio of the catalyst (a) to the monomer (d) is in the range from 1:700 to 1:100,000.