Montecatini Edison S.p.a.

Basell Poliolefine Gmbh

Giorgio Mazzanti

Giulio Natta

Piero Pino

Giorgio Boschi

This invention relates to a process for copolymerizing unsaturated hydrocarbons of the formula CH &boxH;CHR in which R is a saturated aliphatic radical with two or more carbon atoms or a cycloaliphatic radical, in the presence of a catalyst comprising a catalytic aluminum alkyl compound and a catalytic titanium halide compound.

Process for the polymerization and copolymerization of certain unsaturated hydrocarbons

A mixture of monomers essentially consisting of propylene and ethylene is polymerized in contact with a halogen-containing catalyst essentially free of microcrystalline precipitates, said catalyst resulting from mixing an alkyl aluminum compound with a hydrocarbon-soluble vanadium compound. The molar ratio of the propylene and ethylene in contact with the catalyst is maintained at a value such that an elastomeric, substantially amorphous, linear copolymerizate is produced, and is recovered from the reaction mass.

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Milan, Italy

Giorgio Mazzanti