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

1977-05-18

1978-08-15

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, 252429C, 526 97, 526124, 526125, 526129, 526132, 526156, 526351, 526906, C08F 402, C08F 1006

Patent

active

041074149

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 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: 3676415 (1972-07-01), Diedrich et al.

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