Loading patent…
AssigneeSumitomo Chemical Company, Limited
InventorsKeisaku Yamamoto, Kizuku Wakatsuki, Hayato Saba, Tadaaki Nishiyama
Estimating the term…
A process for producing ethylene-.alpha.-olefin copolymer rubbers which comprises mixing a vanadium compound-containing solution and an alcohol-containing solution with stirring for 10-600 seconds to obtain a mixed solution, immediately feeding the mixed solution into a polymerization vessel containing an organoaluminum compound, and copolymerizing ethylene and an .alpha.-olefin, or ethylene, an .alpha.-olefin and a non-conjugated diene compound in the polymerization vessel. According to this process, the activity of polymerization catalyst can be maintained at a high level, no by-product of the reaction of the vanadium compound and the alcohol is deposited as precipitate in the apparatus and no such additional operations as bubbling is necessary.
A process for producing ethylene-.alpha.-olefin copolymer rubbers which comprises mixing a vanadium compound-containing hydrocarbon solution and an alcohol-containing hydrocarbon solution with stirring for 10-600 seconds to obtain a mixed hydrocarbon solution, feeding the mixed hydrocarbon solution into a polymerization vessel containing an organoaluminum compound, and copolymerizing ethylene and an .alpha.-olefin, or ethylene, an .alpha.-olefin and a non-conjugated diene compound in the polymerization vessel.
A process for producing ethylene-.alpha.-olefin copolymer rubbers which comprises mixing a vanadium compound-containing hydrocarbon solution and an alcohol-containing hydrocarbon solution with stirring 10-600 seconds to obtain a mixed solution, said vanadium compound being a vanadium halide or a vanadium oxyhalide, and said alcohol contained in the alcohol-containing hydrocarbon solution is an alcohol having an aliphatic hydrocarbon group of 1-12 carbon atoms;
Dependencies are inferred from the claim text.