Patent ID: 6291608
Filing Date: 2001-09-18
Classification: C08F

Abstract:
A polymerization process comprising contacting in a reaction zone under slurry polymerization reactor conditions:a) at least one mono-1-olefin andb) a dual catalyst system comprising a first catalyst system which comprises a metallocene catalyst and a cocatalyst and a second catalyst system which comprises diimine nickel complexes which further comprise additional ligands selected from the group consisting of .alpha.-deprotonated-.beta.-diketones and .alpha.-deprotonated-.beta.-ketoesters, having a formula selected from the group consisting of Ni(NCR'C.sub.6 R.sub.2 H.sub.3).sub.2 (Y.sub.2 C.sub.3 R"".sub.2 X).sub.2, Ni(NCR'C.sub.6 R.sub.2 H.sub.3).sub.2 (Y.sub.2 C.sub.3 R'.sub.2 X)Z,wherein each R can be the same or different and is selected from the group consisting of branched or linear alkyl or aromatic groups having from about 1 to about 10 carbon atoms per alkyl group and can be in any position on the aromatic ring;wherein each R' can be the same or different and is selected from the group consisting of hydrogen and linear, branched, cyclic bridging aromatic or aliphatic hydrocarbons, having from about 1 to about 70 carbon atoms per radical group;wherein each R""CYCXCYR"" is a substituent, or ligand, on the diimine nickel complex and can be the same or different and is selected from the group consisting of .alpha.-deprotonated-.beta.-diketones, .alpha.-deprotonated-.beta.-ketoesters, and mixtures thereof, and wherein each R"" and X can be the same or different and are selected from the group consisting of hydrogen and linear, branched, or cyclic bridging aromatic or aliphatic hydrocarbons, and mixtures thereof having from about 1 to about 70 carbon atoms per radical group, optionally containing atoms other than carbon and hydrogen;wherein each Y can be the same or different and is selected from the group consisting of oxygen, sulfur, and selenium; andwherein Z is a halogen selected from the group consisting of fluorine, chlorine, bromine, iodine, and mixtures thereof; andwherein a polymer is recovered.