Activation of Siloxy-substituted Compounds and Homopolymerisation of Ethylene by Different Soluble Alumoxane Cocatalysts

The first synthesised examples of di-siloxy-substituted cyclopentadienyl zirconocenes, their synthesis, structure and activity in ethylene polymerisation

“…An important group of zirconocenes in this respect is the siloxy substituted bis-indenyl metallocenes which have been investigated by Leino, Luttikhedde and Kallio et al who have shown them to be highly active in olefin polymerisation and well behaving in the polymerisation process [14]. The more unusual behaviour of this complex family has been investigated by Kallio et al, [15,16] who reported hexaisobutylalumoxane (HIBAO) as a well functioning co-catalyst in combination with siloxy substituted zirconocenes. Previous research using HIBAO as co-catalyst with zirconocenes did not report this high level of activities [17].…”