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OwnerCharles R. Kutal, Sirisoma Wanigatunga +2inventors
InventorsCharles R. Kutal, Sirisoma Wanigatunga, Gabriel Keita, Yassin Turshani
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The invention relates to a process for polymerising a monomer, polymerizing and/or crosslinking an oligomer, or crosslinking a polymer or copolymer, said monomer, oligomer, polymer and copolymer being selected among precursor monomers, urethane, thiourethane and episulfide oligomers, and urethane, thiourethane and episulfide polymers and copolymers, which comprises: (a) adding to precursor monomers or oligomers or polymers or copolymers an effective amount of at least one complex of Co, Mo or W which under irradiation conditions photochemically reacts to release at least one anionically charged nucleophile or uncharged Lewis base; and (b) irradiating the mixture of (a) to release the at least one anionically charged nucleophile or uncharged Lewis base to initiate polymerisation and/or crosslinking of the monomer, oligomer, polymer or copolymer.
Photopolymerization initiator selected from the group consisting of Mo or W complexes which under irradiations conditions photochemically reacts to release at least one uncharged Lewis base, wherein the released uncharged Lewis base is 1,2-diazabicvclo[2,2,2]loctane. pyrrolidine, dimethylcyclohexylamine, or a mixture thereof.
A photopolymerization initiator selected from the group consisting of [Co(NH3)4(SCN)2][BPh4]
Dependencies are inferred from the claim text.