| 摘要 |
The invention relates to salt-like crosslinking agents for the free-radical polymerisation of ethylenically unsaturated monomers, containing at least two unsaturated anionic groups and a polyvalent cation, where the crosslinking agent has the following general formula: <IMAGE> where R1 and R2 are identical or different and are H, Cl, F, Br or I; R3 and R4 are identical or different and can be a methyl group, a hydrogen atom, a halogen atom or -CN, m is an integer between 2 and 4, and K is a polyvalent central group containing a polyvalent metal atom from Group II, III, IV, V, VI, Ia, IIa, IVa, Va, VIa, VIIa or VIIIa of the Periodic Table, having the valency m + x, where x is an integer between 0 and 4, and some of the valences of the central atom can also be saturated by other atoms A, and to a process for the free-radical crosslinking of polymers prepared from ethylenically unsaturated monomers by means of this crosslinking agent, and to the use of the crosslinking agent.
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