| abstract |
A process for the preparation of substantially amorphous propylene (co)polymers, comprising contacting propylene under polymerization conditions, optionally in the presence of one or more olefins, with a catalyst system comprising: A) semi Sandwich titanium complex, wherein cyclopentadienyl is substituted by one or two heterocyclic rings; according to formula (I): see formula (I) in claim 1: wherein X is N or P; Z is C, Si or Ge; Y 1 is an atom selected from NR 7 , O, PR 7 or S; Y 2 is selected from CR 8 or Y 1 , and m is 0 or 1, and B) activates the cocatalyst. The aforementioned titanium complexes and ligands useful as intermediates in their synthesis are also described. |