18702190. DUAL CATALYST COMPOSITIONS (CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE)
Contents
DUAL CATALYST COMPOSITIONS
Organization Name
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
Inventor(s)
Jean-François Carpentier of Rennes Cedex (FR)
Evgueni Kirillov of Rennes Cedex (BE)
Alexandre Welle of Seneffe (BE)
Virginie Cirriez of Seneffe (BE)
DUAL CATALYST COMPOSITIONS
This abstract first appeared for US patent application 18702190 titled 'DUAL CATALYST COMPOSITIONS
Original Abstract Submitted
The present invention relates to a catalyst composition comprising: catalyst component A comprising the meso form of a bridged metallocene compound with two indenyl groups, each indenyl being substituted with one or more substituents, wherein at least one of the substituents is an aryl or heteroaryl; wherein the meso/rac ratio of the meso form of the bridged metallocene compound of catalyst component A is 95:5 or greater; catalyst component B comprising a bridged metallocene compound with a substituted or unsubstituted cyclopentadienyl group and a substituted or unsubstituted fluorenyl group; and an optional activator; an optional support; and an optional co-catalyst. The present invention also relates to a polymerization process using said composition. The invention further relates to olefin polymers at least partially catalyzed by said catalyst composition and articles comprising said olefin polymers. The present invention also relates to a metallocene-catalyzed ethylene polymer having: a melt index MI2 ranging from 0.1 g/10 min to 12.0 g/10 min wherein MIis determined according to ISO 1133:2005 Method B, condition D, at a temperature 190° C. and a 2.16 kg load using a die of 2.096 mm; a molecular weight distribution M/M, ranging from 4.0 to 12.0, with Mbeing the weight-average molecular weight and Mn being the number-average molecular weight; a rheology long chain branching index grheo of at least 0.90, preferably at least 0.93, preferably at least 0.95; and preferably at least 0.30% by weight of ethyl branching with regard to the total weight of the ethylene polymer measured by C NMR, with the proviso that said ethyl branching is not generated from 1-butene incorporation as comonomer.
