A solution polymerization process for the preparation of elastomeric ethylene propylene (diene) elastomers is characterized by the use of a) an unbridged catalyst having a cyclopentadienyl ligand and a monosubstituted nitrogen ligand; and b) a boron activator. High molecular weight elastomers may be inexpensively prepared by the process of this invention. The elastomers are suitable for the manufacture of rubber sheets or membranes and automotive parts such as seals, belts, hoses and tire sidewalls.

Um processo da polimerização da solução para a preparação de elastomers elastomeric do propylene do etileno (diene) é caracterizado pelo uso de a) unbridged o catalizador que tem um ligand do cyclopentadienyl e a monosubstituted o ligand do nitrogênio; e b) um activador do boro. Os elastomers elevados do peso molecular podem barata ser preparados pelo processo desta invenção. Os elastomers são apropriados para a manufatura das folhas ou as membranas de borracha e partes automotrizes tais como selos, correias, mangueiras e sidewalls do pneu.

 
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