Polymerisation of olefins using modified ziegler-natta catalyst

Details Polymerisation of olefins using modified ziegler-natta catalyst Polymerisation of olefins using modified ziegler-natta catalyst

1988-06-08

1990-01-16

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

502133, 526138, 526901, 526904, 526908, 526909, 5263486, 526352, C08F 464, C08F 1000

Patent

active

048944246

ABSTRACT:
The present invention relates to a process for the polymerisation or copolymerisation of alpha-olefins in the presence of a Ziegler-Natta catalyst system comprising on the one hand a catalyst solid comprising compounds of halogens, transition metals of Groups IV, V, VI of the Periodic Table of Elements, magnesium and optionally aluminum, free from a metal/carbon bond and on the other hand a catalyst consisting of organometallic compounds of metals of Group II or III of the said Table. This process is characterised in that before its use in polymerisation or copolymerisation, the catalyst solid is treated by water in a given quantity, this treatment making it possible to improve the conditions for obtaining polymers, particularly in a process of polymerisation or copolymerisation in the gas phase.

REFERENCES:
patent: 4130699 (1978-12-01), Haff et al.
patent: 4136058 (1979-01-01), Harris et al.
patent: 4282341 (1981-08-01), Klaerner et al.
patent: 4308361 (1981-12-01), Fujii et al.
patent: 4356111 (1982-10-01), Shipley et al.
patent: 4511703 (1985-04-01), Bailly

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