Process for producing .alpha.-olefin polymers

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

1981-02-12

1982-12-14

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

252429B, 526114, 526115, 526116, 526119, 526121, 526122, 526124, 526125, 526 65, 526348, 5263486, 526351, 526901, 526902, C08F 402, C08F 1000

Patent

active

043639011

ABSTRACT:
A process for producing high-quality .alpha.-olefin polymers with a higher yield in a long lasting stabilized manner even in the case of gas phase polymerization is provided. In the production process of .alpha.-olefin polymers which comprises reacting a trivalent metal halide with a divalent metal compound to obtain a solid product (I); reacting this product with at least one electron donor (ED) and at least one electron acceptor (EA), once to 10 times, and at that time, using TiCl.sub.4 at least once as the (EA) to obtain a solid product (II); combining this product with an organoaluminum compound (OAl) and an (ED) (these three being referred to as catalyst components), the improvement which comprises subjecting a part or the whole of the catalyst components to polymerization treatment with a small amount of an .alpha.-olefin, at least in the coexistence of the solid product (II) and (OAl), in the combination of the catalyst components to obtain a preactivated catalyst, and subjecting .alpha.-olefin(s) to gas phase polymerization or bulk or slurry polymerization followed by gas phase polymerization, using the catalyst.

REFERENCES:
patent: 4063010 (1977-12-01), Marie et al.
patent: 4260707 (1981-04-01), Sylvester et al.
patent: 4287328 (1981-09-01), Kikuta et al.

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