Photopolymerization process and composition employing a...

C - Chemistry – Metallurgy – 08 – F

Patent

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C08F 2/46 (2006.01) C08F 2/48 (2006.01) C08F 216/12 (2006.01) C08F 222/06 (2006.01) C09D 4/06 (2006.01) C09D 167/06 (2006.01) G03F 7/027 (2006.01) G03F 7/038 (2006.01)

Patent

CA 2334255

A radiation curable coating composition is provided and includes an effective amount of cationic photoinitiator, in combination with a charge transfer complex, the charge transfer complex comprising at least one electron withdrawing reactant component and at least one electron donating reactant component free radically reactive therewith, the electron withdrawing reactant component comprising an unsaturated nitrogen containing compound and the electron donating reactant component comprising an unsaturated compound having at least one vinyl ether group, the electron donating reactant component may be separate from or structurally incorporated within the electron withdrawing reactant component and an effective amount of a cationic photoinitiator. A photopolymerization process employing the composition is also provided.

L'invention concerne une composition de revêtement pouvant durcir sous l'effet d'un rayonnement, comprenant une quantité efficace de photoamorceur cationique, combinée à un complexe de transfert de charge. Ce complexe de transfert de charge comprend au moins un composant réactif accepteur d'électrons et au moins un composant réactif donneur d'électrons, à réaction radicalaire avec le composant précité. Le composant réactif accepteur d'électrons comprend un composé contenant de l'azote insaturée, et le composant réactif donneur d'électrons contient un composé insaturé possédant au moins un groupe d'éther vinylique. Le composant réactif donneur d'électrons peut être séparé du composant de réactif accepteur d'électrons, ou structurellement incorporé dans celui-ci, et dans une quantité efficace d'un photoamorceur cationique. L'invention concerne également un procédé de polymérisation utilisant ladite composition.

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