An antioxidant composition comprising at least one diaromatic amine compound of the formula
wherein R, R. and Rc are independently selected from the group consisting of hydrogen and
A is alkyl of 1-12 carbon atoms. haloalkyl, aralkyl. mercapto or alkylmercapto; X is alkyl of 1-12 carbon atoms; and n is 0 or 1 with the priviso that where R, R, and Rb are
n is 0, or that where only R is
n is 1; and at least one substituted melamine compound of the formula
wherein Rc through Rh are independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, cycloalkyl, aryl and substituted aryl.
The relative weight ratio of formula I to formula II compounds in the composition of this invention can range from about 1:10 to about 10:1. The above compositions are highly affective stabilizers for synthetic lubricants.
一种
抗氧化剂组合物,包含至少一种式中的二芳香族胺化合物
其中 R、R.和 Rc 分别独立地选自氢和以下组成的组
A 是 1-12 个碳原子的烷基、卤代烷基、芳基、巯基或烷基巯基; X 是 1-12 个碳原子的烷基; n 是 0 或 1,但以下情况除外:当 R、R 和 Rb 是
n 为 0,或当只有 R 是
n为1;以及至少一种取代的
三聚氰胺化合物,其式如下
其中 Rc 至 Rh 独立选自由氢、烷基、取代烷基、环烷基、芳基和取代芳基组成的组。
本发明组合物中式 I 与式 II 化合物的相对重量比可从约 1:10 到约 10:1。上述组合物是合成润滑油的高效稳定剂。