Process for producing .alpha.-olefin polymers

Details Process for producing .alpha.-olefin polymers Process for producing .alpha.-olefin polymers

1981-09-28

1983-12-13

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526139, 526140, 526141, 526142, C08F 466

Patent

active

044205937

ABSTRACT:
A process for producing .alpha.-olefin polymers with a controlled stereoregularity and with a higher yield is provided, which process comprises: combining a TiCl.sub.3 -containing composition obtained by reducing TiCl.sub.4, with an organoaluminum compound; thereafter subjecting the composition to a polymerization treatment with an .alpha.-olefin; before, during or after the polymerization treatment, adding an electron donor or/and an electron acceptor or a reaction product of these two; as well as adding a reaction product of a trialkylaluminum with an electron donor having a specified molar ratio of the electron donor to the trialkylaluminum selected in the range of 0.01 to 5; and polymerizing an .alpha.-olefin in the presence of the resulting preactivated catalyst.

REFERENCES:
patent: 4136243 (1979-01-01), Appleyard
patent: 4187385 (1980-02-01), Iwao
patent: 4210729 (1980-07-01), Hermans
patent: 4210738 (1980-07-01), Hermans
patent: 4217432 (1980-08-01), Shiga
patent: 4295991 (1981-10-01), Wristers
patent: 4304890 (1981-12-01), Suzuki
patent: 4309521 (1982-01-01), Sato

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