Catalyst system for high-temperature (co)-polymerization of ethylene
Patent 4739022 Issued on April 19, 1988. Estimated Expiration Date: 
December 10, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 10, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3135809 3766158 3899477 Process for preparing polyolefin Polymerization of ethylene or ethylene/ olefin mixtures in the presence of improved titanium/vanadium catalyst Process for the preparation of polymers of alpha-olefins at high temperatures Patent #: 4547473 InventorsAssigneeApplicationNo. 06/940080 filed on 12/10/1986US Classes:526/116, At least one Group IVB metal atom (Ti, Zr, Hf) and at least one Group VB meta l (V, Nb, Ta)526/348.2, At least six carbon atoms526/352From ethylene onlyExaminersPrimary: Garvin, Patrick P.Attorney, Agent or FirmInternational ClassesC08F 10/02 (20060101)C08F 10/00 (20060101) Foreign Application Priority Data1986-01-11 NLAbstractThe process for (co)polymerization comprises polymerizing ethylene and optionally minor amounts of 1-alkenes and/or dienes at a temperature greater than 180° C. in the presence of a catalyst system prepared by combining at least two components, A and B, which components comprise:A: one or more titanium compounds and one or more vanadium compounds, mixed with one or more organoaluminum compounds in such an amount that the atomic ratio of aluminum to the sum of titanium and vanadium is at least 3,B: one or more organoaluminum compounds,wherein one or both components A and b contain a chloride, and wherein the two components are fed, separately or in combination, direct to the reaction vessel in such an amount that the atomic ratio of the chlorine from components A and/or B to the sum of titanium and vanadium of component A is at least 6. | |
