摘要:
A prepolymerized solid catalyst is prepared by reacting a suitable support base with an organoaluminum compound and then reacting that product with an activity promoting amount of water and then reacting the resulting solid cocatalyst with a metallocene and then subjecting that product to prepolymerization in the presence of hydrogen. The prepolymerized solid catalyst is useful in the polymerization of olefins.
摘要:
A process for preparing an alkynyl fulvene group containing compound and said compound is provided. Said process comprises reacting an alkynyl ketone compound with a cyclopentadienyl-type compound.
摘要:
A process to produce an ethylene-bridged-metallocene-transition-metal compound that has an omega-alkenyl substitution on said ethylene bridge is provided. Said process comprises: contacting a diolefin compound with a peracid compound to form an omega-alkenyl oxirane compound; contacting said omega-alkenyl oxirane compound with an organometal compound to form an organo-omega-alkenyl-alcohol compound; contacting said organo-omega-alkenyl-alcohol compound with an organosulfur compound to form an organo-omega-alkenyl-organosulfur ester compound; contacting said organo-omega-alkenyl-organosulfur ester compound with an organometal to form an orgaomega-alkenyl-organo compound; contacting said organo-omega-alkenyl-organo compound with a transition metal compound to form a organo-omega-alkenyl-organo-transition compound. Additionally, processes to polymerize olefins using these compounds is provided.
摘要:
In accordance with the present invention there is provided a cyclopentadienyl-type ligand represented by the formula ZA, wherein Z is a cyclopentadienyl-type group, wherein A is --YPR.sub.2, --YNR.sub.2, or --NR.sub.2, wherein Y is an alkylene group containing 1 to 24 carbon atoms, wherein each R is individually selected from alkyl groups containing 1 to 20 carbon atoms. Another aspect of the invention is to provide a metallocene represented by the formula ZAMX.sub.3, wherein Z and A are as described above, M is a Group IVB or VB transition metal, and X is a halide. Other aspects of the present invention include catalyst systems comprising the metallocenes and an organoaluminoxane, processes for preparing the above defined ligands, metallocenes and catalyst systems, and polymerization processes employing the catalyst systems.
摘要:
A process for producing a new metallocene comprising reacting a first bridged metallocene which has an olefinically unsaturated with about two molar equivalents of an alkali metal alkyl, catalyst systems resulting from the combination of the resulting metallocenes and a cocatalyst, and polymerization processes using such catalyst systems are disclosed.
摘要:
An (organo) ((omega-alkenyl) cyclopentacarbyl) (silane-bridged) metallocene compound is provided. Polymerization processes therewith are also provided.
摘要:
Metallocenes having a 9-fluorenyl group and another cyclic dienyl group connected by a single carbon having a terminally unsaturated hydrocarbyl substituent wherein the 9-fluorenyl group has a hydrocarbyl substituent in the 4 position, olefin polymerization catalyst systems prepared therefrom, and the use of such catalyst systems are disclosed.
摘要:
Olefins are polymerized with a catalyst system resulting from the combination of unbridged substituted indenyl cyclopentadienyl metallocenes and an organoaluminum cocatalyst.
摘要:
Double bound metallocenes, i.e. metallocenes having a cyclopentadienyl-containing radical that is bound to a transition metal both by a pi bond and by a sigma carbon bond of a substituent of that same cyclopentadienyl-containing radical can be prepared by reducing metallocenes having a cyclopentadienyl-containing radical having at least one an unsaturated substituent. Also a process for producing polymers comprising contacting at least one olefinic monomer under suitable polymerization conditions with such double bound metallocenes.
摘要:
In accordance with the present invention there is provided a cyclopentadienyl-type ligand represented by the formula ZA, wherein Z is a cyclopentadienyl-type group, wherein A is --YPR.sub.2, --YNR.sub.2, or --NR.sub.2, wherein Y is an alkylene group containing 1 to 24 carbon atoms, wherein each R is individually selected from alkyl groups containing 1 to 20 carbon atoms. Another aspect of the invention is to provide a metallocene represented by the formula ZAMX.sub.3, wherein Z and A are as described above, M is a Group IVB or VB transition metal, and X is a halide. Other aspects of the present invention include catalyst systems comprising the metallocenes and an organoaluminoxane, processes for preparing the above defined ligands, metallocenes and catalyst systems, and polymerization processes employing the catalyst systems.