| 摘要 |
A first aspect of the invention provides a catalyst for addition polymerisation of olefinically unsaturated monomers comprising: a) a first compound MY where M is a transition metal in a low valency state or a transition metal in a low valency state co-ordinated to at least one co- ordinating non-charged ligand, Y is a monovalent, divalent or polyvalent counterion; b) an initiator compound comprising a homolytically breakable bond with a halogen atom; and c) an organodiimine, where at least one of the nitrogens of the diimine is not part of an aromatic ring; a second aspect of the invention provides a catalyst for addition polymerisation of olefinically unsaturated monomers comprising: d) a first component of the Formula [ML]n+ An- where M = a transition metal of low valency state, L = an organodiimine where at least one of the nitrogens of the diimine is not part of an aromatic ring, A = an anion, n = an integer of 1 to 3, m = an integer of 1 or 2; e) an initiator compound comprising a homolytically breakable bond with a halogen atom. Preferably, the organodiimine is a 1,4-diaza-1,3- butadiene, a pyridine carbaldelyde imine, an oxazolidone or a quinoline carbaldehyde. Processes for using the catalysts are also disclosed.
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