Process for the preparation of polyolefins
New polymerization catalyst
Process for production of a high molecular weight ethylene -olefin elastomer with a metallocene alumoxane catalyst Patent #: 5001205
ApplicationNo. 594776 filed on 10/09/1990
US Classes:526/160, Transition metal bonded to carbon atom526/127, Contains non-transition free metal, hydride thereof, or carbon to non-transition metal atom bond526/129, Silicon present in inorganic oxygen-containing compound526/282, Contains an exterior ethylenic substituent bonded to a single carbon atom of the bridged ring system526/283, Compound containing dicyclopentadiene moiety526/336, Ethylenic groups are non-conjugated, e.g., divinylbenzene, etc.526/943POLYMERIZATION WITH METALLOCENE CATALYSTS
ExaminersPrimary: Teskin, Fred
Attorney, Agent or Firm
Foreign Patent References
International ClassesC08F 004/64
AbstractA process for producing a high molecular weight EPDM elastomer having low crystallinity using a bridged bis-metallocene-alumoxane catalyst wherein the metallocene component of the catalyst has the formula: ##STR1## wherein "M" is titanium, zirconium or hafnium; each "R1 " independently is a C1 to C20 linear, branched or cyclic alkyl group or a C2 to C4 alkylene which forms a fused ring system; "R2 " is a C1 to C6 linear, branched or cyclic alkylene group, an alkyl substituted silanylene group or an alkyl substituted silaalkylene group; each "X" independently is a halogen, hydride, alkyl, aryl or chelating group, and "y" is an integer of 2 to 4.
Field of SearchTransition metal bonded to carbon atom
Contains non-transition free metal, hydride thereof, or carbon to non-transition metal atom bond
Silicon present in inorganic oxygen-containing compound
Contains an exterior ethylenic substituent bonded to a single carbon atom of the bridged ring system
Compound containing dicyclopentadiene moiety
Ethylenic groups are non-conjugated, e.g., divinylbenzene, etc.