04411821 is referenced by 37 patents and cites 11 patents.

Improved 1-olefin polymerization catalyst system, and process employing same, comprising a reaction product of alumina and an organometallic compound of the formula (RCH.sub.2).sub.4 M wherein M is Ti, Zr or Hf and R is a group which is such that there is no hydrogen atom attached to an atom which is in the .beta.-position to M, the improvement characterized in that the preformed catalyst system is controlled in its mode of action and is protected from impurities by mixing with it an oxide, hydroxide, or carbonate of magnesium, calcium, strontium, or barium.

Title
1-Olefin polymerization catalyst
Application Number
237459
Publication Number
4411821
Application Date
February 17, 1982
Publication Date
October 25, 1983
Inventor
Edward G Howard Jr
Hockessin
DE, US
Assignee
E I Du Pont de Nemours and Company
DE, US
IPC
C08F 4/64
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