A composition of matter comprising a polymer, resin, mineral fluid or synthetic fluid subject to oxidative, thermal and actinic degradation and at least a compound of formula (I)
wherein R1 and R2 are independently hydrogen, alkyl of 4,8 or 14 to 36 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenyl, phenyl substituted by alkyl of 1 to 12 carbon atoms, aralkyl of 7 to 9 carbon atoms or said aralkyl substituted by alkyl of 1 to 12 carbon atoms; and n is 1 or 2.
一种物质组合物,包含可被氧化、热降解和光降解的聚合物、
树脂、矿物流体或合成流体以及至少一种式 (I) 的化合物,其中 R1 和 R2 独立地为氢、4、8 或 14 至 36 个碳原子的烷基、5 至 12 个碳原子的环烷基、苯基、被 1 至 12 个碳原子的烷基取代的苯基、7 至 9 个碳原子的芳基或被 1 至 12 个碳原子的烷基取代的芳基;以及 n 为 1 或 2。