Gas phase olefin polymerization process

Details Gas phase olefin polymerization process Gas phase olefin polymerization process

1991-04-08

1994-02-01

Michl, Paul R.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524398, 524400, 526901, 526903, 526904, C08K 509

Patent

active

052832783

ABSTRACT:
The present invention relates to an alpha-olefin prepolymer catalytically active in an alpha-olefin (co-)polymerization comprising a transition metal, an organometallic compound and an antistatic agent. The prepolymer can be prepared by contacting the antistatic agent with a catalyst comprising the transition metal and the organometallic compound before or during an alpha-olefin prepolymerization. It can also be prepared by contacting the antistatic agent with an alpha-olefin prepolymer after a prepolymerization. It can also be prepared by a combination of the two methods. The prepolymer can be introduced into a gas phase (co-)polymerization medium for preparing polyolefin directly in a dry powder form, with a reduced amount of sheeting and agglomerates.

REFERENCES:
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patent: 4594367 (1986-06-01), Geissel et al.
patent: 4920167 (1990-04-01), Ruetman et al.
patent: 5165998 (1992-11-01), Bailly et al.
I. Foygt, Stabilization of Synthetic Polymers Against the Effect of Light and Heat, Leningrad, "Khimiya" Publishers, 1972, pp. 338-339, Exhibit 2 & 3, original Russian with English translation.

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