Method for producing aqueous copolymer dispersions of copolymers consisting of carbon monoxide and olefinically unsaturated compounds

A process for preparing aqueous dispersions of copolymers of carbon monoxide and olefinically unsaturated compounds by copolymerizing carbon monoxide and olefinically unsaturated compounds in an aqueous medium in the presence of

• a1) metal complexes of the formula (I)
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• where the substituents and indices have the following meanings:
• G is —(CRb2)r— or —(CRb2)s—Si(Ra)2—(CRb2)t—, -A-O—B— or -A-Z(R5)—B— where
• R5 is hydrogen, linear or branched C1-C20-alkyl, C3-C10-cycloalkyl, C6-C14-aryl, C6-C14-aryl bearing functional groups based on nonmetallic elements of the groups IVA, VA, VIA and VIIA of the Periodic Table as substituents, aralkyl having from 1 to 20 carbon atoms in the alkyl part and from 6 to 14 carbon atoms in the aryl part, heteroaryl, long-chain radicals which have from 5 to 30 carbon atoms in the chain and have polar or charged end groups, —N(Rb)2, —Si(Rc)3 or a radical of the formula II
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• where
• q is an integer from 0 to 20 and the further substituents in formula (II) are as defined for formula (I)
• A, B are each —(CRb2)r′— or —(CRb2)n—Si(Ra)2—(CRb2)t— or —N(Rb)—, an r′-, s- or t-atomic constituent of a ring system or together with Z an (r′+1)-, (s+1)- or (t+1)-atomic constituent of a heterocycle,
• Ra are each, independently of one another, linear or branched C1-C20-alkyl, C3-C10-cycloalkyl, C6-C14-aryl, C6-C14-aryl bearing functional groups based on nonmetallic elements of groups IVA, VA, VIA and VIIA of the Periodic Table as substituents, aralkyl having from 1 to 20 carbon atoms in the alkyl part and from 6 to 14 carbon atoms in the aryl part,
• Rb may be as defined for Ra and may also be hydrogen or —Si(Rc)3,
• Rc is linear or branched C1-C20-alkyl, C3-C10-cycloalkyl, C6-C14-aryl or aralkyl having from 1 to 20 carbon atoms in the alkyl part and from 6 to 14 carbon atoms in the aryl part,
• r is 1, 2, 3 or 4 and
• r′ is 1 or 2,
• s, t are each 0, 1 or 2, where 1<s+t<3
• Z is an element of group VA of the Periodic Table of the Elements,
• M is a metal selected from groups VIIIB, IB and IIB of the Periodic Table of the Elements,
• E1, E2 are each a nonmetallic element of group VA of the Periodic Table of the Elements,
• R1 to R4 are each, independently of one another, linear or branched C1-C20-alkyl, C3-C10-cycloalkyl, C6-C14-aryl, C6-C14-aryl bearing functional groups based on nonmetallic elements of groups IVA, VA, VIA and VIIA of the Periodic Table as substituents, aralkyl having from 1 to 20 carbon atoms in the alkyl part and from 6 to 14 carbon atoms in the aryl part or heteroaryl,
• L1, L2 are formally charged or uncharged ligands,
• X are formally monovalent or polyvalent anions,
• p is 0, 1, 2, 3 or 4,
• m, n are each 0, 1, 2, 3 or 4,
• where p=m×n,
• or a compound of the formula (III)
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• where
• Rd, Re,
• Rf, Rg are each, independently of one another, hydrogen, linear or branched C1-C6-alkyl or
• Re and Rf together form a five- or six-membered carbocycle or heterocycle and
• the other substituents and indices are as defined under formula (I),
• b) dispersants and, if desired,
• c) sparingly water-soluble organic solvents, where
• d) the metal complexes a1) are present in solution in part of or the total amount of the olefinically unsaturated compounds and/or the sparingly water-soluble organic solvents c) and
• e) the part or total amount of the olefinically unsaturated compounds and/or the sparingly water-soluble organic solvent c) in which the metal complexes a1) are dissolved is present in the aqueous medium as a disperse phase having a mean droplet diameter of ≦1000 nm.