Patent ID: 6482967
Filing Date: 2002-11-19
Classification: B01J,C08F,Y10S

Abstract:
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 tetravalent carbon atom connecting the Z's and which has its other valences satisfied by a terminally unsaturated hydrocarbyl substituent, having 2 to 20 carbon atoms, and by hydrogen or a hydrocarbyl group having 1 to 10 carbon atoms, and M is a metal selected from the group consisting of 4B, 5B, and 6B 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 valences of M.