Montecatini Edison S.p.a.

Basell Poliolefine Gmbh

Giulio Natta

Giorgio Mazzanti

Alberto Valvassori

Nazzareno Cameli

Giorgio Boschi

Piero Pino

Guido Sartori

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

There is disclosed a new class of substantially linear, amorphous, unsaturated, vulcanizable, high molecular weight copolymers of ethylene, a higher alpha-olefin of the formula CH.sub.2 = CHR in which R is an alkyl group containing from 1 to 6 carbon atoms and certain specific omega-alkenyl derivatives of norbornene in which the double bond of the alkenyl group is non-vinyl and occurs at either end of said group. A process for the preparation of the new copolymers by the use of catalysts acting according to an anionic coordinate mechanism is also disclosed.

Ethylene-olefin-alkenyl norbornene elastomers

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.

Process for producing elastomers and intermediates for synthetic rubbers

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Milan, Italy

Giulio Natta