Tetra(neophyl) zirconium and its use in process for the polymeri

Details Tetra(neophyl) zirconium and its use in process for the polymeri Tetra(neophyl) zirconium and its use in process for the polymeri

1974-05-20

1976-01-13

Garvin, Patrick P.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252431R, 260 853R, 260 882R, 260 882E, 260 937, 260 943, 260 949D, 2604293, B01J 3112

Patent

active

039323072

ABSTRACT:
There are disclosed olefin polymerization catalysts based on tetra(neophyl) zirconium and its reaction products with surface-hydroxylated oxides of metals of Groups II(a), III(a), IV(a) and IV(b) of the Periodic Table of the Elements, processes for their preparation, and processes for the polymerization of olefinic monomers employing such catalysts. Neophyl zirconium aluminate supported on alumina is disclosed as the preferred, most active catalyst. The polyolefins produced are linear high polymers of high crystallinity such as polyethylene and isotactic polypropylene. Diolefins are converted into rubber by use of the process employing the catalyst. Ethylene-propylene copolymer rubbers can also be produced by use of the catalysts.

REFERENCES:
patent: 3694422 (1972-09-01), Long
patent: 3738944 (1973-06-01), Candlin et al.
patent: 3740384 (1973-06-01), Ballard et al.
patent: 3817931 (1974-06-01), Brooks et al.
patent: 3840508 (1974-10-01), Ballard et al.

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