Comoounds of the formula:
wherein R is selected from (1) alkyl radicals having 6 to 20 carbon atoms; (2) phenyl radicals which may be substituted by 1 or 2 alkyl groups having 1 to 8 carbon atoms; or (3) aralkyl radicals having 7 to 12 carbon atoms; and wherein R' is selected from (1) alkylene radicals having 2 to 6 carbon atoms; (2) cycloalkylene radicals having 5 to 12 carbon atoms; (3) alkylcycloalkylene radicals of the formula -R3-R2(R4)n, wherein R2 is a cycloalkylene radical having 5 to 12 carbon and R3 and R. are alkylene radicals having 1 to 6 carbon atoms, and n equals 1 or 0; (4) or a group of the formula -R5-YR6, wherein R, and R6 are alkylene radicals having 2 to 6 carbon atoms and Y is oxygen, sulfur, or a 1,4-phenylene radical. These compounds have utility as synergistic stabilizers with phenolic type antioxidants in the stabilization of organic materials such as natural and synthetic 'polymers, rubbers, lubricants and oils, etc.
式中的化合物:
其中 R 选自 (1) 具有 6 至 20 个
碳原子的烷基;(2) 可被 1 或 2 个具有 1 至 8 个
碳原子的烷基取代的
苯基;或 (3) 具有 7 至 12 个
碳原子的芳烷基;其中 R' 选自 (1) 具有 2 至 6 个
碳原子的亚烷基;(2) 具有 5 至 12 个
碳原子的环亚烷基;(3) 式 -R3-R2(R4)n 的烷基环亚烷基,其中 R2 是具有 5 至 12 个
碳的环亚烷基,R3 和 R. 是具有 1 至 8 个
碳原子的亚烷基。是具有 1 至 6 个
碳原子的亚烷基,n 等于 1 或 0;(4) 或式 -R5-YR6 的基团,其中 R 和 R6 是具有 2 至 6 个
碳原子的亚烷基,Y 是
氧、
硫或 1,4-亚
苯基基。在稳定
天然和合成
聚合物、橡胶、润滑剂和油等有机材料时,这些化合物可作为
酚类抗氧化剂的协同稳定剂。