Process for the stereoregular polymerization of alpha-olephins

Details Process for the stereoregular polymerization of alpha-olephins Process for the stereoregular polymerization of alpha-olephins

1978-11-13

1980-10-07

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

252429B, 526 97, 526125, 526351, 526902, 526906, C08F 402, C08F 1006

Patent

active

042269636

ABSTRACT:
There is disclosed a process for the stereoregular polymerization of alpha olefins or mixtures thereof with ethylene conducted in the presence of highly active and stereospecific new catalysts. The catalysts are obtained from the reaction of a particular Al-alkyl compound which is at least in part in the form of a complex and/or a substitution reaction product with an electron-donor compound free from ester groups of oxygenated organic and inorganic acids, with a supported component characterized by having surface area exceeding certain values or by showing a particular X-rays spectrum and which is obtained by contacting a halogenated Ti compound, preferably in the form of a complex with an electron-donor compound, with a support comprising a Mg or Mn dihalide in an active state. In the catalysts the ratio between the Ti compound expressed in Ti g-atoms and the g-moles of the electron donor compounds is lower than 0.3.

REFERENCES:
patent: 3139418 (1964-06-01), Marullo et al.
patent: 3219648 (1965-11-01), Hill
patent: 3238146 (1966-03-01), Hewett et al.
patent: 3502634 (1970-03-01), Stedefeder et al.
patent: 3629222 (1971-12-01), Coover et al.
patent: 3676415 (1972-07-01), Diedrich et al.

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