Process for the manufacture of a mixed catalyst

Details Process for the manufacture of a mixed catalyst Process for the manufacture of a mixed catalyst

1981-03-09

1982-05-11

Shaver, Paul F.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

526125, 526151, 526152, C08F 402, C08F 464

Patent

active

043292569

ABSTRACT:
A catalyst system of such high efficiency that the purification of the polymer can be dispensed with is obtained by first reacting a magnesium halide with an electron donor and/or a cyclopolyene, bringing the product obtained into contact with a TiCl.sub.3 -containing compound and using a stereoregulator. The system has a high stereospecificity whereby the proportion of atactic polymer is kept low. No excess amount of transition metal halides is required and the polymer obtained has uniform coarse particles and a very low halogen content. sp

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patent: 4263169 (1981-04-01), Scata et al.
patent: 4265785 (1981-05-01), Giannini et al.
patent: 4279776 (1981-07-01), Shiga et al.
patent: 4287328 (1981-09-01), Kikuta et al.
patent: 4290915 (1981-09-01), Toyota et al.

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