Process for polymerizing high melt index olefins and...

Details Process for polymerizing high melt index olefins and... Process for polymerizing high melt index olefins and...

C - Chemistry, Metallurgy

08

F

252/100, 402/631

C08F 4/78 (2006.01) C08F 2/60 (2006.01) C08F 10/00 (2006.01)

Patent

CA 1179316

ABSTRACT OF THE DISCLOSURE A process is disclosed for polymerizing an olefin to provide a polyolefin of high melt index which comprises contacting the olefin with a catalyst system obtained by heat activating a supported organophosphoryl chromium compound obtained by the reaction of chromium trioxide with an organophosphorous compound having the formula: Image or Image wherein R is alkyl, aralkyl, aryl, cycloalkyl, or hydrogen, but at least one R is other than hydrogen, and combining the heat activated supported material with a melt index in- creasing amount of at least one organoborane catalyst modifier having the formula: Image wherein m and n each is zero or 1, R1 and R2 are each a hydrocarbyl group of from 1 to 10 carbon atoms, or one of R1 and R2 is hydrogen, or together R1 and R2 constitute A hydrocarbly group of from 2 to 10 carbon atoms.

396805

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