Process and catalyst for producing polyethylene having a broad m

Details Process and catalyst for producing polyethylene having a broad m Process and catalyst for producing polyethylene having a broad m

1985-04-26

1990-06-19

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526116, 526119, 526160, C08F 466, C08F 1002

Patent

active

049354744

ABSTRACT:
Polyolefins having a broad molecular weight distribution are obtained by polymerizing ethylene or higher alpha-olefins in the presence of a catalyst system comprising two or more metallocenes each having different propagation and termination rate constants and alumoxane.

REFERENCES:
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patent: 4368305 (1983-01-01), Tanaka et al.
patent: 4404344 (1983-09-01), Sinn et al.
patent: 4542199 (1985-09-01), Kaminsky et al.
Sinn et al. Advances in Organometallic Chemistry, vol. 18 (1980) pp. 99-143.
Kaminsky; "Ethylene Propylene Diene Terpolymers Produced with a Homogeneous and Highly Active Zirconium Catalyst"; Journal of Polymer Science; pp. 2151-2164.
John Boor, Jr.; "Ziegler-Natta Catalysts and Polymerizations"; 1979; Table 20-2; Academic Press.
C. A. Lukach; "Copolymers of a-Olefins"; Research Center Hercules Powder Company Wilmington, Delaware.
W. Kaminsky; "Polymerization of Propene and Butene with a Chiral Zirconocene and Methylalumoxane as Cocatalyst"; p. 507; Agnew. Chem. Int. Ed. 1965.

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