| abstract |
A catalytic composition comprising a contact product of a hybrid metallocene compound and an activator, wherein the hybrid metallocene compound has the formula: wherein: M is Zr, Hf or Ti; X1 and X2 are independently a halide or an aliphatic, aromatic or cyclic group, substituted or unsubstituted, or a combination thereof; X3 is a cyclopentadienyl, indenyl or fluorenyl group, substituted or unsubstituted, any substituent in X3 are independently a hydrogen atom or an aliphatic, aromatic or cyclic, substituted or unsubstituted group, or a combination thereof; X4 is -O-RA, -NH-RA, -PH-RA, -S-RA or -CRB> = NRC, where: RA is an aryl group substituted with an alkenyl substituent, any substituent on RA other than the alkenyl substituent they are independently a hydrogen atom or an alkyl, alkenyl or alkoxy group, substituted or unsubstituted; and RB and RC are independently a hydrogen atom or aliphatic, aromatic or cyclic group, substituted or unsubstituted, or a combination thereof, wherein the activator is an activating support comprising a solid oxide treated with an electron acceptor anion. , wherein: the solid oxide is silica, alumina, silica-alumina, aluminum phosphate, heteropolitungstates, titania, zirconia, magnesia, boria, zinc oxide, any mixed oxide thereof, or any mixture thereof; and the electron acceptor anion is fluoride, chloride, bromide, phosphate, triflate, bisulfate, sulfate or any combination thereof. |