| 摘要 |
A visible light polymerisable composition comprises 1) free radically polymerisable material such as one or more monomers and/or prepolymers containing acrylate or methacrylate groups or a copolymerisable monomer combination based on a polythiol and a polyene. 2) a p-arene metal complex of formula (I), where a stands for 1 or 2 and n and q independently of each other each stand for an integer from 1 to 3, M is the cation of a monovalent to trivalent metal from groups IVb, VIIb, VIII or Ib of the periodic system, m is an integer corresponding to the valence of L + q, Q is a halogen and L is a metal or nonmetal with a valence of 2 to 7, R<1> is a pi -arene and R<2> is a pi -arene or the anion of a pi -arene. 3) a free radical rate accelerator such as a peroxide or hydroperoxide compound. More particularly, the pi -arene metal complex is a complex salt of a eta <6>, eta <5> iron arene cation and a non-nucleophilic anion, which is of formula (VII), where R<6> is a eta <6> arene selected from benzene, alkyl benzenes, alkyloxybenzenes, halobenzenes, haloalkylbenzenes, naphthalene, alkoxynaphthalenes, alkylnaphthalenes, halonaphthalenes, biphenyl, indene, pyrene or diphenylsulphide; R<7> is the anion of a cyclopentadienyl compound, L is di- to heptavalent metal or metaloid, Z is a halogen and k is equal to 1 plus the valence of L. |
