METAL COMPLEX COMPOSITIONS BASED ON COBALT AND THEIR USE AS POLYMERIZATION CATALYST FOR OLEFINS AND DIENES

摘要

This invention relates to metal complex compositions, their preparation and their use as catalysts to produce polymers of conjugated dienes through polymerization of conjugated diene monomers and copolymers of conjugated dienes with aromatic or nonaromatic alpha olefins or with nonconjugated dienes. The used metal complex compositions comprise cobalt complex compositions in combination with activator compounds type 1 and activator compounds type 2 and a catalyst modifier. Particularly the invention relates to cobalt complexes containing at least one cobalt - oxygen bond and to the preparation of the catalyst and the use of the prepared catalyst to produce homopolymers of conjugated dienes or copolymers of conjugated dienes with aromatic or nonaromatic alpha-olefins or with nonconjugated dienes, preferably polymerization of 1,3-butadiene or isoprene or copolymerization of 1,3-butadiene or isoprene with styrene or divinyl benzene. The activator compounds can be one alumoxane type activator or a noncoordinating anion-forming reagent such as, but not limited to, organoborates or organoborone compounds and one alkylaluminum halide type activator are used in combination with the cobalt complexes and with one or more aromatic compounds for the synthesis of homopolymers or copolymers. The aromatic modifier is applied in amounts similar or smaller than the amounts of the used activators.