Catalysts

Details Catalysts Catalysts

C - Chemistry, Metallurgy

08

F

402/374, 252/1.A

C08F 4/00 (2006.01) C08F 4/42 (2006.01)

Patent

CA 2023545

ABSTRACT CATALYSTS A polymerisation process which comprises contacting at least one polar acrylic type or maleimide monomer under polymerisation conditions with a catalyst system comprising a catalyst comprising (i) and (ii): (i) a tetracoordinate organosilicon, organotin or organogermanium initiator having at least one initiating site in which a silicon, tin or germanium atom is bound by a nitrogen or phosphorus atom to a nitrogen- or phosphorus-containing group which is devoid of any reactive hydrogen atom, (ii) a co-catalyst which is a source of fluoride, bifluoride, cyanide, cyanate, aliphatic and aromatic mono-sulphonate, or azide ions or a Lewis acid, and which ions or Lewis acid are/is rendered available in the polymerisation medium, and (iii) an interactive agent capable of interacting with the anion of the co-catalyst, a catalyst system consisting of the componemts (i) to (iii) and the combination of components (ii) and (iii), both as used in the process.

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