[EN] PROCESS FOR HOMO- OR COPOLYMERIZATIONOF CONJUGATED OLEFINES<br/>[FR] PROCEDE D'HOMO- OU COPOLYMERISATION D'OLEFINES CONJUGUEES
申请人:DOW GLOBAL TECHNOLOGIES INC
公开号:WO2004074333A2
公开(公告)日:2004-09-02
Metal complexes suitable for use in polymerization are described which correspond to Formula (1) in which M is yttrium, a group 4 metal, a lanthanide or an actinide metal; Ml is a group 1 or group 2 metal; T independently each occurrence is nitrogen or phosphorus; RB and RC independently each occurrence is hydrogen or is selected from certain groups and two RC groups may be joined together forming a divalent ligand group; X independently each occurrence is an anionic ligand group having up to 60 atoms, provided that X is not a cyclic, delocalized, aromatic group that is π-bonded to M, and two X groups together may form a divalent ligand group; D independently each occurrence is a neutral Lewis base ligand having up to 30 nonhydrogen atoms; x is the number 1, 2 or 3; x' is the number 1 or 2; t is a number from 0 to 3; t' is a number from 0 to 3; r is the number 0 or 1 and o is the number 1 or 2. These metal complexes may be combined with one or more activator compounds to make catalyst compositions which may be used to manufacture polymers having a high percentage of the fraction of residual olefinic double bonds that are Z or cis units and a, low 1,2 polybutadiene content. The polymers are useful for modification of plastics and for the manufacture of a wide range of products including tires, golf balls, hoses, belts, gaskets, seals, and shoes.