Polymerization of propene with the MgCl2-supported dichlorobis (?-diketonato) titanium catalysts combined with methylaluminoxane or an ordinary alkylaluminum

Highly Efficient Supported Diimine Ni(II) and Iminopyridyl Fe(II) Catalysts for Ethylene Polymerizations

“…The three supporting methods are related to the chemistry of the catalytic compounds and usually need tedious preparation and purification steps. With few exceptions [15,16], in myriad cases, the activity of the supported catalyst is half to a tenth that of the soluble counterpart. This is ascribed to the diminished diffusion of monomer into the interior pores of the supported catalyst and to the result of fewer active centers present in the heterogeneous variant.…”

MAO- and Borate-Free Activating Supports for Group 4 Metallocene and Post-Metallocene Catalysts of α-Olefin Polymerization and Oligomerization

“…The first study of the activation of Group 4 post-metallocenes using MgCl 2 and different alkylaluminums in propylene polymerization was conducted by Soga and colleagues in 1997 [ 129 ] on the example of β-diketonate L 2 TiCl 2 complexes Ti3 – Ti6 ( Scheme 4 a). Pre-catalysts were prepared by the reaction of Ti3 – Ti6 with MgCl 2 in toluene, and the activation by alkylaluminums was performed in n -heptane.…”

“…The use of harmless and cost-competitive Scheme 4. (a) β-Diketonate Ti(IV) complexes studied in propylene polymerization after activation by R 3 Al/MgCl 2 [129]; (b) FI catalysts studied in ethylene polymerization using Et 3 Al/MgCl 2 activator [79].…”

Novel bis(benzoin) titanium catalyst for homo- and copolymerization of norbornene with ethylene: Synthesis, characterization and catalytic properties

“…In general, most of the highly active non-metallocene titanium catalysts for E-NB copolymerization possess nitrogen atoms as neutral donors, while less attention has been paid to titanium catalysts with oxygen-containing ligands. There were a few reports on the synthesis of dichlorobis(b-diketonato)titanium complexes and their catalytic behavior for a-olefin polymerization [37][38][39].…”