1
John A Ewen, Howard C Welborn Jr: Process and catalyst for producing polyethylene having a broad molecular weight distribution. Exxon Research & Engineering Co, M B Kurtzman, July 23, 1985: US04530914 (276 worldwide citation)

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.


2
John A Ewen, Howard C Welborn Jr: Process and catalyst for producing polyethylene having a broad molecular weight distribution. Exxon Research & Engineering Company, M B Kurtzman, June 19, 1990: US04935474 (117 worldwide citation)

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.


3
Welborn Howard C Jr, Ewen John A: Methode et catalyseur pour la production de polyethylene a masse moleculaire largement repartie, Process and catalyst for producing polyethylene having a broad molecular weight distribution. Exxon Research And Engineering Company, BORDEN LADNER GERVAIS, January 19, 1988: CA1231701 (3 worldwide citation)

ABSTRACT OF THE DISCLOSURE Polyolefins having a broad molecular weight distributionare obtained by polymerizing ethylene or higher alpha-olefinsin the presence of a catalyst system comprising two or moremetallocenes each having different propagation and terminationrate constants and alumoxane.