Patent ID: 6096677
Filing Date: 2000-08-01
Classification: B01J,C07F,C08F,Y10S

Abstract:
A supported metallocene catalyst containing more than one active site, having the structure B(Z).sub.q of structural formula (I) ##STR32## wherein: B is a covalent bridging group comprising carbyl, silyl, disilyl, germanyl, ammonium, phosphonium, ##STR33## or a C.sub.1 -C.sub.24 hydrocarbyl radical optionally containing a Group IVB element, a Group VB element, or both a Group IVB element and a Group VB element, and is capable of binding up to n.sub.max substituents through single covalent bonds, where n.sub.max is at least 4;R and R.sup.1 are independently selected from the group consisting of halogen, C.sub.1 -C.sub.24 hydrocarbyl, C.sub.1 -C.sub.24 hydrocarbyl substituted with one or more halogen atoms, and C.sub.1 -C.sub.24 hydrocarbyl-substituted Group IVB elements, x is 0, 1, 2, 3 or 4, and y is 0, 1, 2, 3 or 4, with the proviso that the sum of x and y cannot exceed 4, or, when R and R.sup.1 are ortho to each other and x and y are each 1 or greater, R and R.sup.1 can together form a five- or six-membered cyclic structure optionally substituted with one to four substituents selected from the group consisting of halogen, C.sub.1 -C.sub.24 hydrocarbyl, C.sub.1 -C.sub.24 hydrocarbyl substituted with one or more halogen atoms, and C.sub.1 -C.sub.24 hydrocarbyl-substituted Group IVB elements;Q is cyclopentadienyl, indenyl, fluorenyl, indolyl or aminoboratobenzyl, optionally substituted with one or more R and R.sup.1 substituents as above, or Q is J(R.sup.2).sub.z-2 wherein J is an element with a coordination number of three from Group VB or an element with a coordination number of two from Group VIB, R.sup.2 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.24 hydrocarbyl, C.sub.1 -C.sub.24 hydrocarbyl substituted with one or more halogen atoms, and C.sub.1 -C.sub.24 alkoxy, and z is the coordination number of J, and further wherein Q substituents on different Z groups may be linked through a C.sub.1 -C.sub.24 hydrocarbylene bridge;M is a Group IIIA element, a Group IVA element, a Group VA element, a lanthanide, or an actinide;X is selected from the group consisting of hydride, halide, alkoxy, amido, C.sub.1 -C.sub.24 hydrocarbyl, C.sub.1 -C.sub.24 hydrocarbyl radicals substituted with one or more electron-withdrawing groups, and C.sub.1 -C.sub.24 hydrocarbyl-substituted Group IVB elements, or, when two or more X substituents are present, they may together form an alkylidene olefin, acetylene, or a five- or six-membered cyclic hydrocarbyl group;Y is a neutral Lewis base,m is 1, 2, 3 or 4, and n is 0, 1, 2 or 3, with the proviso that if M is a Group IIIA element, m is 1 and n is 0, and with the further proviso that if M is a Group IVA element, the sum of m and n does not exceed 2;if n.sub.max is 4 or 5, then q is 2, and if n.sub.max is greater than 5, then q is an integer in the range of 2 to q.sub.max, wherein q.sub.max is equal to 1/2 n.sub.max when n.sub.max is an even number, and 1/2(n.sub.max -1) when n.sub.max is an odd number, with the proviso that when q is 2 and the M elements in the two Z groups are the same, Q is necessarily J(R.sup.2).sub.z-2 ; andat least two of the Z substituents bound to B are different, wherein the catalyst is supported on an inert inorganic support material.