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Ewen John Alexander, Welborn Howard Curtis Jr: Process and catalyst for polyolefin density and molecular weight control.. Exxon Research Engineering Co, December 27, 1984: EP0129368-A1 (420 worldwide citation)

Catalysts comprising (a) derivatives of mono, bi and tricyclopentadienyl coordination complexes with a transition metal and (b) and an alumoxane are employed in a process of producing polyolefins of controlled molecular weight.


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Ewen John Alexander, Welborn Howard Curtis Jr: Process and catalyst for producing reactor blend polyolefins.. Exxon Research Engineering Co, December 12, 1984: EP0128046-A1 (93 worldwide citation)

Polyolefin reactor blends obtained by polymerization of ethylene and higher alpha-olefins in the presence of a catalyst system comprising two or more metallocenes and alumoxane.


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Ewen John Alexander, Welborn Jr Howard C: Polyolefin polymerization catalyst component. Exxon Res &Amp Eng Co, October 17, 1995: JP1995-268015

PURPOSE: To obtain metallocene catalyst components capable of giving olefin polymerization products with excellent properties in molecular weight, density and terminal unsaturation and advantageously being used at high temperatures. CONSTITUTION: Desired olefin polymerization catalysts are represent ...