Process for the stereoregular polymerization of alpha-olefins

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

1980-02-01

1982-06-22

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526125, 526128, C08F 402, C08F 1000

Patent

active

043363601

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 ester of an oxygenated organic or inorganic acid, with a supported component characterized by having surface area exceeding certain values or showing a particular X-rays spectrum, and obtained by contacting a Ti halogenated compound, preferably in the form of a complex with an electron-donor compound, with a support comprising a Mg or Mn bihalide in an activated condition. In the catalysts the ratio between the Ti compound, expressed in Ti g-atoms, and the g moles of the ester and the electron-donor compound, when present, is lower than 0.3.

REFERENCES:
patent: 3238146 (1966-03-01), Hewett et al.
patent: 3554993 (1971-01-01), Mobuly et al.
patent: 3676415 (1972-07-01), Diedrich et al.
patent: 4107414 (1978-08-01), Giannini et al.

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