Process for preparing vinylic polymers with catalyst system containing metal complex and Lewis acid

A polymerisation process far the preparation of vinylic polymer from the corresponding vinylic monomer, which process comprises reacting said corresponding monomer in the presence of a catalyst system comprising

• a) a metal complex of general formula (I)
• where A is nickel, iron, cobalt, chromium, manganese, titanium, zirconium, vanadium, or a rare earth metal;
• L1, L2, L3 and L4 are ligands and
• b) a Lewis acid of general formula (II)
• wherein at least one of W, Y or Z is a C1-10-alkyl groups capable of forming a co-ordination bond with A and at least one of the others of W, Y and Z are phenoxide, substituted phenoxide, or thiolate bulky groups;
• and D is aluminium, mangesium, zinc or boron.

A polymerisation process for the preparation of a polymer from the corresponding monomer of at least one of alkyl(alk)acrylic acid and esters thereof, functionalised alky(alk)acrylic acid and esters thereof, vinyl acetate or mixture thereof, which process comprises reacting said corresponding monomer in the presence of a catalyst system comprising

• a) a metal complex of general formula (I)
• where A is nickel, iron or cobalt;
• L1, L2, L3 and L4 are ligands and
• b) a Lewis acid of general formula (II)
• wherein W is a C1-10-alkyl group capable of forming a co-ordination bond with A, and Y and Z are bulky groups;
• and D is aluminium, mangesium, zinc or boron.

A polymerisation process for the preparation of vinylic polymer from tile corresponding vinylic monomer, which process comprises reacting said corresponding monomer in the presence of a catalyst system comprising

• a) a metal complex of general formula (I)
• where A is nickel, iron, cobalt, chromium, manganese, titanium, zirconium, vanadium, or a rare earth metal;
• L1, L2, L3 and L4 are ligands and
• b) a Lewis acid of general formula (II)
• wherein W a C1-10-alkyl group capable of forming a co-ordination bond with A and Y and Z are phenoxide, substituted phenoxide, or thiolate bulky groups;
• and D is aluminium, mangesium, zinc or boron.