Catalysts for the polymerization of (alpha) olefins, process for obtaining the new catalysts.Homo and copolu00ecmeros olefins obtained from catalysts and process for the production of copolu00ecmeros olefu00ecnicos

摘要

"Catalysts for the polymerization of 244 - olefins, process for obtaining the new catalysts.Homo and copolu00ecmeros olefins obtained from catalysts and process for the production of copolu00ecmeros olefu00ecnicos ".Invention patent refers to a new class of catalysts metalocu00eanicos rigid or not containing at least a bulky substituent group such as aThe general formula L ~ 2 ~ MT (or) ~ x ~ C1 ~ 2 - x ~ (I) where l is a substituent 5-cyclopentadienyl 5-cyclopentadienyl or replaced; - TM is a transition metal of group 4 of the periodic table; or drift is aThe dinuclear alcohols bulky; X is 1 or 2. The polyolefins obtained with these catalysts have high molecular weight, high melting temperature, crystalline and polidispersu00e3o close.The polypropylenes obtained with these catalysts has considerable amount of ethylene units in their chain.