SISTEMA DE CATALIZADOR CONTENIENDO METAL BARIO

Sistema de catalizador que comprende un compuesto de organolitio, la sal de bario de 2-N,N-dimetil amino etoxi etanol, y un compuesto organometálico seleccionado del grupo que consiste en compuestos de organoaluminio que contienen menos de 13 átomos de carbono y compuestos de organomagnesio. The gro...

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Bibliographische Detailangaben
Hauptverfasser:	HSU, WEN-LIANG, HALASA, ADEL FARHAN, ZUPPO III, JOHN ROBERT, AUSTIN, LAURIE ELIZABETH, JASIUNAS, CHAD AARON
Format:	Patent
Sprache:	spa
Schlagworte:	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
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Beschreibung
Zusammenfassung:	Sistema de catalizador que comprende un compuesto de organolitio, la sal de bario de 2-N,N-dimetil amino etoxi etanol, y un compuesto organometálico seleccionado del grupo que consiste en compuestos de organoaluminio que contienen menos de 13 átomos de carbono y compuestos de organomagnesio. The group IIa metal containing catalyst system of this invention can be utilized to synthesize rubbery polymers having a high trans microstructure by solution polymerization. Such rubbery polymers having a high trans microstructure content, such as polybutadiene rubber, styrene-isroprene-butadiene rubber, styrene-butadiene rubber, can be utilized in tire tread rubbers that exhibit improved wear and tear characteristics. This invention more specifically reveals a catalyst system which is comprised of (a) an organolithium compound, including organolithium functionalized compounds, (b) a group IIa metal salt selected from the group consisting of group IIa metal salts of di(alkylene glycol)alkylethers and group IIa metal salts of tri(alkylene glycol) alkylethers, and (c) an organoaluminum compound, and optionally an organomagnesium compound. The subject invention further discloses a process for synthesizing rubbery polymers having a high trans microstructure by a process that comprises polymerizing a conjugated diolefin monomer in an organic solvent in the presence of a catalyst system that is comprised of (a) an organolithium compound, (b) a group IIa metal salt selected from the group consisting of group IIa metal salts of amino glycols and group IIa metal salts of glycol ethers, and (c) an organoaluminum compound.