Photopolymerizable compositions featuring novel amine...

Details Photopolymerizable compositions featuring novel amine... Photopolymerizable compositions featuring novel amine...

C - Chemistry, Metallurgy

08

F

C08F 20/00 (2006.01)

Patent

CA 2655025

A photopolymerization accelerator composition improving color stability and controlling polymerization shrinkage stress of cured resin and/or the resulting composite paste thereby feature by tertiary twisted biphenyldiamine with the general formula I: R2 and R3 are each independently alkyl having from 1 to 5 carbon atoms; R and Rl are each independently hydrogen or halogen; alkyl, alkoxy, or alkylthio having from 1 to 18 carbon atoms; or phenyl and/or substituted phenyl alkoxy, or alkylthio having from 1 to 18 carbon atoms. It can be used in part with conventional photosensitizers and radically polymerizable monomers.

L'invention concerne une composition d'accélérateur de photopolymérisation permettant d'améliorer la stabilité des couleurs et d'éviter la contrainte due au retrait lors de la polymérisation de la résine durcie et/ou de la pâte composite résultante, comprenant une biphényldiamine tertiaire tordue de formule générale I : R2 et R3 représentent chacun indépendamment des alkyles ayant de 1 à 5 atomes de carbone; R et R1 représentent chacun indépendamment un hydrogène ou un halogène; un alkyle, alcoxy ou alkylthio ayant de 1 à 18 atomes de carbone; ou un phényle et/ou un phényle alcoxy substitué ou un alkylthio ayant de 1 à 18 atomes de carbone. Elle peut être utilisée avec des photosensibilisateurs classiques et des monomères polymérisables radicalement.

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