Preparation of homopolymers and copolymers of ethylene by means

Details Preparation of homopolymers and copolymers of ethylene by means Preparation of homopolymers and copolymers of ethylene by means

1987-10-14

1989-07-04

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

502126, 5263486, 526901, 526904, C08F 464, C08F 1002

Patent

active

048451770

ABSTRACT:
Ethylene is polymerized using a Ziegler catalyst system consisting of (1) a titanium catalyst component and (2) an aluminum catalyst component, the component (1) used being the product (VI) which is obtained by a method in which (1.1) first (1.1.1) a carrier (I) and (1.1.2) a solution (II) of (IIa) a solvent, (IIb) a titanium trichloride and (IIc) magnesium chloride are combined with formation of a dispersion (III) and the latter is evaporated down with formation of an intermediate (IV), and (1.2) then (1.2.2) the intermediate (IV) obtained from (1.1), and (1.2.2) an aluminum component (V) consisting of (1.2.2.1) a complex of a certain oxacycloalkane and a certain aluminum compound and (1.2.2.2) if necessary, a certain free aluminum compound are combined, the resulting product (VI) being the catalyst component (1). In this process, a component (1) is employed which has been prepared using, in (1.1) under (1.1.2), a solution (II) which (i) contains a ketone as (IIa) and (ii) additionally contains (IId) a certain low molecular weight polymeric compound.

REFERENCES:
patent: 4521573 (1985-06-01), Lee et al.
patent: 4605714 (1986-08-01), Baker
patent: 4713430 (1987-12-01), Kerth et al.

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