CATALIZADORES DE METALOCENO DE MONOCICLO PENTADIENILO EXENTOS DE ALUMINIO PARA LA POLIMERIZACION DE OLEFINAS

• Main Authors: HLATKY, GREGORY, GEORGE, TURNER, HOWARD, WILLIAM, CANICH, JOANN, MARIE
• Format: Patent
• Language: Spanish
• Published: 01.03.1997
• Edition: 6
• Subjects: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; THEIR RELEVANT APPARATUS; TRANSPORTING

LA INVENCION ES UN SISTEMA CATALIZADOR QUE INCLUYE UN COMPONENTE DE METAL DE TRANSICION DEL GRUPO IV DE ACTIVADOR QUE SE PUEDE UTILIZAR PARA POLIMERIZAR OLEFINAS PARA PRODUCIR UN POLIMERO DE ALTO PESO MOLECULAR. EL COMPONENTE DE METAL DE TRANSICION DEL GRUPO IV-B CONTIENE UN LIGANDO QUE CICLOPENTADIENILO UNICO Y UN LIGANDO ETEROATOMICO UNICO, LOS CUALES PUEDEN PUENTEARSE ENTRE SI; EL COMPONENTE DE ACTIVADOR COMPRENDE UN CATION, QUE PUEDE SER UN ACIDO DE BRONSTED CAPAZ DE DONAR UN PROTON (EN LO SUCESIVO INDICADO COMO L'' -H, EN DONDE L'' ES UNA BASE DE LEWIS NEUTRA Y H ES HIDROGENO) Y UN ANION NO COLIGANTE COMPATIBLE. The invention relates to a process for olefin polymerisation at a temperature of from -100 to 0°C or 100 to 300°C using a catalyst system of the following formula :wherein: M is Zr, Hf or Ti and is in its highest formal oxidation state (+4, d⁰ complex);(C₅H5-y-xRx) is a cyclopentadienyl ring which is substituted with from zero to five substituent groups R, "x" is 0, 1, 2, 3, 4 or 5 denoting the degree of substitution, and each substituent group R is, independently, a radical selected from a group consisting of C₁-C₂₀ hydrocarbyl radicals, substituted C₁-C₂₀ hydrocarbyl radicals wherein one or more hydrogen atoms is replaced by a halogen atom, C₁-C₂₀ hydrocarbyl-substituted metalloid radicals wherein the metalloid is selected from the Group IV A of the Periodic Table of Elements, and halogen radicals, or (C₅H5-y-xRx) is a cyclopentadienyl ring in which two adjacent R-groups are joined forming a C₄-C₂₀ ring to give a polycyclic cyclopentadienyl ligand;(JR'z-l-y) is a heteroatom ligand in which J is an element with a coordination number of three from Group VA or and element with a coordination number of two from Group VI A of the Periodic Table of Elements, and each R' is, independently a radical selected from a group consisting of C₁-C₂₀ hydrocarbyl radicals, substituted C₁-C₂₀ hydrocarbyl radicalswherein one or more hydrogen atoms is replaced by a halogen atom, and "z" is the coordination of number of the element J;each Q may be independently, hydride, C₁-C₅₀ hydrocarbyl radicals, substituted hydrocarbyl radicals wherein one or more hydrogen atom is replaced by an electron-withdrawing group such as a halogen atom, or alkoxide radical, or C₁-C₅₀ hydrocarbyl-substituted metalloid radicals wherein the metalloid is selected from the Group IV-A of the Periodic Table of Elements, provided that where any Q is a hydrocarbyl such Q is different from(C₅H5-y-xRx),or both Q together may be an alkylidene, olefin, acetylene or a cyclometallated hydrocarbyl,"y" is 0 or 1; when "y" is 1, B is a covalent bridging group containing a Group IV A or V A element,L is a neutral Lewis base; and "w" is a number from 0 to 3,[A]⁻ is a labile, bulky anion which is either a single coordination complex having a plurality of lipophilic radicals covalently coordinated to and shielding a charge bearing metal or metalloid centre or an anionic complex containing a plurality of boron atoms.