Catalyst composition for polymerizing alpha-olefin

U.S. Patent Number: 5330951

Abstract: The catalyst of the invention is useful in preparing high density polymers of controlled molecular weight distribution. A supported alpha-olefin polymerization catalyst composition of this invention is prepared in a multi-step process. In the first step, a mixture of a solid, porous carrier having reactive --OH groups and a non-polar solvent is contacted with at least one organomagnesium compound of the formula where R and R' are the same or different C.sub.4 -C.sub.12 alkyl groups, m and n are each 0, 1 or 2, providing that m+n equals the valence of Mg. Subsequently, the mixture of the first step is contacted with 1-butanol. The amount of 1-butanol controls the molecular weight distribution of the The mixture is then contacted with at least one transition metal compound soluble in the non-polar solvent to form a precursor which is activated with a cocatalyst selected from the group consisting of diisobutyl aluminum hydride or triethylaluminum (TEAL) (sometimes referred to as an activator, and the words activator and cocatalyst may be used interchangeably herein.)

Inventors: Mink; Robert I. (Warren, NJ), Nowlin; Thomas E. (Cranbury, NJ)

Assignee: Mobil Oil Corporation (Fairfax, VA)

Application Number: 07/997,433

Issued: 1994-07-19

Expired: 2006-07-19

Classes: 502/115 ; 502/104; 502/116; 502/125; 502/153; 502/158; 526/129

Field of search: 502/111,115,120,125,126,153,158

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