Title: Tetra(neophyl) zirconium and its use in process for the polymerization of olefins

Abstract: There are disclosed olefin polymerization catalysts based on tetra(neophyl) zirconium and its reaction products with surface-hydroxylated oxides of metals of Groups II(a), III(a), IV(a) and IV(b) of the Periodic Table of the Elements, processes for their preparation, and processes for the polymerization of olefinic monomers employing such catalysts. Neophyl zirconium aluminate supported on alumina is disclosed as the preferred, most active catalyst. The polyolefins produced are linear high polymers of high crystallinity such as polyethylene and isotactic polypropylene. Diolefins are converted into rubber by use of the process employing the catalyst. Ethylene-propylene copolymer rubbers can also be produced by use of the catalysts.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Setterquist, Robert Alton (Wilmington, DE, US)

Application Number: 471813
Filing Date: 1974-05-20
Publication_date: 1976-01-13
Assignee: E. I. Du Pont de Nemours and Company (Wilmington, DE)
Primary Class(es): 502/154 502/152, 526/130, 526/156, 526/160, 526/282, 526/334, 526/336, 526/348, 526/348.2, 526/352, 534/10, 556/10, 556/27, 556/28, 556/52
Other Classes:
US Patent Ref:

3694422	Sep, 1972	Long	252/430.
3738944	Jun, 1973	Candlin et al.	252/431.
3740384	Jun, 1973	Ballard et al.	252/431.
3817931	Jun, 1974	Brooks et al.	252/430.
3840508	Oct, 1974	Ballard et al.	252/431.

Other Refs:
Primary Examiner: Garvin, Patrick P.
Assistant Examiner:
Attorney: