Novel fused ring compounds, and their use as cationic...

C - Chemistry – Metallurgy – 07 – D

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C07D 333/76 (2006.01) C07D 279/20 (2006.01) C07D 335/12 (2006.01) C07D 335/16 (2006.01) C07D 339/08 (2006.01) C08F 2/46 (2006.01) C09D 11/10 (2006.01)

Patent

CA 2477414

Compounds of formula (I) [in which: R1 represents a direct bond, an oxygen atom, a group >CH2, a sulphur atom, a group >C=O, a group -(CH2)2- or a group of formula -N-Ra, where Ra is hydrogen or an alkyl; R4, R5, R6 and R7 are each hydrogen or various groups or atoms; R8, R9, R10 and R11 are each hydrogen, hydroxy, or alkyl; or R9 and R11 form a fused ring system with the benzene rings to which they are attached; R12 is a direct bond, oxygen atom or methylene; and X is an anion; and esters thereof] are useful as cationic photoinitiators, especially for use in surface coating applications, such as printing inks and varnishes, and which are intended to be cured by polymerisation initiated by radiation.

L'invention concerne des composés de formule (I), dans laquelle R?1¿ représente une liaison directe, un atome d'oxygène, un groupe CH¿2?, un atome de soufre, un groupe C=O, un groupe -(CH¿2?)¿2?- ou un groupe de formule-N-R?a¿, où R?a¿ représente l'hydrogène ou un alkyle, R?4¿, R?5¿, R?6¿ et R?7¿ représentent respectivement l'hydrogène ou divers groupes ou atomes, R?8¿, R?9¿, R?10¿ et R?11¿ représentent respectivement l'hydrogène, hydroxy ou un alkyle, ou R?9¿ et R?11¿ constituent un système cyclique fusionné avec les anneaux de benzène auxquels ils sont attachés, R?12¿ représente une liaison directe, un atome d'oxygène ou le méthylène, et X représente un anion, et des esters correspondants sont utilisés comme photo-initiateurs cationiques, notamment, dans des applications de revêtement de surface, telles que des encres d'impression et des vernis, lesdits composés étant destinés à être durcis par polymérisation initiée par rayonnements.

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