Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1981-03-13
1983-04-05
Garvin, Patrick
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252428, 252431P, 526130, 526134, C08F 478
Patent
active
043790755
ABSTRACT:
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: ##STR1## 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 increasing amount of at least one organoborane catalyst modifier having the formula: ##STR2## wherein m and n each is zero or 1,
REFERENCES:
patent: 3969272 (1976-07-01), Meyer
patent: 4312786 (1982-01-01), Katzen et al.
Katzen Stanley J.
Rekers Louis J.
Garvin Patrick
National Petro Chemicals Corp.
Tremain Kenneth D.
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