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 R1 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.
一种光聚合加速剂组合物,可以改善固化
树脂的颜色稳定性,控制聚合收缩应力,以及由此产生的复合糊的特性,其特点是含有三级扭曲联
苯二胺,其通式为I:R2和R3分别独立为具有1至5个碳原子的烷基;R和R1分别独立为氢或卤素;烷基、烷氧基或烷
硫基,其碳原子数为1至18;或苯基和/或取代苯基烷氧基或烷
硫基,其碳原子数为1至18。它可以与传统的光敏剂和自由基聚合单体部分配合使用。