Patent ID: 6136747
Filing Date: 2000-10-24
Classification: C08F,Y10S

Abstract:
A catalyst composition for the polymerization of olefins, comprising: a) a solid Ziegler-Natta catalyst; b) a liquid single site catalyst; and c) at least one activating cocatalyst wherein the Ziegler-Natta catalyst has the formula:Mg.sub.m Ti(OR).sub.n X.sub.p [ED].sub.qwherein ED is an electron donor; 0.5.ltoreq.m.ltoreq.56; n is 0, 1, or 2; 2.ltoreq.p.ltoreq.116; 2.ltoreq.q.ltoreq.85; R is a C.sub.1 to C.sub.14 aliphatic or aromatic hydrocarbon radical or COR' wherein R' is a C.sub.1 to C.sub.14 aliphatic or aromatic hydrocarbon radical; and X is selected from the group consisting of Cl, Br, I, and mixtures thereof, and the single site catalyst has the formula:(L).sub.y R.sup.1.sub.z (L')MX.sub.(x-y-1)wherein M is a metal from groups IIIB to VIII or a rare earth metal of the Periodic Table; L and L' are the same or different and are .pi.-bonded ligands coordinated to M; R.sup.1 is selected from the group consisting of C.sub.1 to C.sub.4 substituted or unsubstituted alkylene radicals, dialkyl or diaryl germanium or silicon groups, and alkyl or aryl phosphine or amine radicals bridging L and L'; each X is independently hydrogen or an aryl, alkyl, alkenyl, alkylaryl, or arylalkyl radical having 1 to 20 carbon atoms, or a hydrocarboxy radical having 1 to 20 carbon atoms; y is 0, 1, or 2; x is 1, 2, 3, or 4 depending upon the valence state of M; z is 0 or 1 and is 0 when y is 0; and x-y.gtoreq.1.