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US 2001/0056033 A1Published application
Metallocenes, polymerization catalyst systems, their preparation, and use
AssigneePhillips Petroleum Company
InventorsAlexander Koppl, Helmut G. Alt, M. Bruce Welch
Life of this patent
Estimating the term…
Abstract
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.
Claims40
A metallocene represented by the formula R(Z)(Z)MQk wherein each Z is bound to M and is a cyclodienyl-type ligand selected from substituted or unsubstituted cyclopentadienyl, indenyl, tetrahydroindenyl, octahydrofluorenyl, and fluorenyl ligands;
- with the further proviso that at least one Z is a 9-fluorenyl having a hydrocarbyl substituent having 1 to 10 carbon atoms at the 4 position, R is a structural bridge linking the Z's which is a single carbon atom connecting the Z's and which has its other valences satisfied by a terminally unsaturated hydrocarbyl substituent, preferably having 2 to 20 carbon atoms, and by hydrogen or a hydrocarby group having 1 to 10 carbon atoms, and M is a metal selected from the group consisting of IVB, VB, and VIB metals of the periodic table, each Q is the same or different and is selected from the group consisting of hydrogen, halogens, and organo radicals;
- k is a number sufficient to fill out the remaining valances of M.
Dependencies are inferred from the claim text.