Intercalation of catalytically active metal complexes in phyllosilicates and their application as propene polymerisation catalysts

Abstract

The cationic Ziegler–Natta polymerisation catalyst [Zr(η-C5H5Me(thf)]+, is intercalated in a synthetic fluorinated mica-type silicate (NaMg2.5Si4O10F2) and the modified, swelling synthetic hectorite [LaponiteRD, Na0.46Mg5.42Li0.46Si8(OH)4O20], by ion-exchange of [Zr(η-C5H5Me(thf)]+ ions with the interlamellar cations of the layered silicates; in the presence of methylaumoxane {MAO, (MeAlO)n} these organometallic intercalation compounds are active catalysts for the polymerisation of propone giving low molecular mass atactic polypropylene with a narrow molecular mass distribution.