Bridged bi-aromatic ligands, catalysts, processes for polymerizing and polymers therefrom
申请人:Symyx Technologies, Inc.
公开号:US20040014950A1
公开(公告)日:2004-01-22
New ligands and compositions with bridged bis-aromatic ligands are disclosed that catalyze the polymerization of monomers into polymers. These catalysts with metal centers have high performance characteristics, including higher comonomer incorporation into ethylene/olefin copolymers, where such olefins are for example, 1-octene, propylene or styrene. The catalysts also polymerize propylene into isotactic polypropylene.
[EN] METHODS FOR PREPARING BRIDGED BI-AROMATIC LIGANDS<br/>[FR] PROCÉDÉS DE PRÉPARATION DE LIGANDS BI-AROMATIQUES PONTÉS
申请人:UNIVATION TECH LLC
公开号:WO2016172044A1
公开(公告)日:2016-10-27
New methods for preparing bridged bi-aromatic ligands are disclosed. The methods employ aryl coupling of unprotected phenols. The ligands may be used to prepare transition metal compounds useful as catalysts in olefin polymerization.
New methods of preparing bridged bi-aromatic ligands are disclosed. The methods employ direct di-ortho-lithiation of aromatic rings of bridged protected bi-aromatic diphenols. The ligands may be used to prepare transition metal compounds useful as catalysts in olefin polymerization.