FORFARANDE FOR ETENPOLYMERISATION I NERVARO AV EN KATALYSATOR OMFATTANDE EN UPPBUREN ORGANOKROMFORENING MED KONDENSERAD RING SAMT KATALYSATOR FOR GENOMFORANDE AV FORFARANDET

摘要

Bis(indenyl)- and bis(fluorenyl)-chromium [II] compounds are deposited on activated inorganic oxide supports to provide catalysts which are useful in the presence of hydrogen, alone, or with cyclopentadiene compounds, for the polymerization of ethylene in high yields. These catalysts exhibit good thermal stability and show a unique response to cyclopentadiene compounds which allows production of polymers having a relatively broad range of melt index values.