Compounds of the formula:
wherein R, R' and R2 are alkyl radicals having 1 to 20 carbon atoms, phenyl radicals which may be substituted by 1 or 2 alkyl groups having 1 to 8 carbon atoms, or cycloalkyl radicals having 7 to 12 carbon atoms, or cycloalkyl radicals having 5 to 12 carbon atoms; and wherein R3 is hydrogen or an alkyl radical having form 1 to 4 carbon atoms. These compounds have utility as synergistic stabilizers with phenolic type antioxidants for the stabilization of organic materials such as natural and synthetic polymers, rubbers, lubricants and oils, etc.
式中 R、R'和 R2 为具有 1 至 20 个碳原子的烷基、可被 1 或 2 个具有 1 至 8 个碳原子的烷基取代的苯基、或具有 7 至 12 个碳原子的环烷基、或具有 5 至 12 个碳原子的环烷基;R3 为氢或具有 1 至 4 个碳原子的烷基。 这些化合物可作为
酚类抗氧化剂的协同稳定剂,用于稳定天然和合成聚合物、橡胶、润滑剂和油等有机材料。