Certain metal salts of one or more dialkylphosphorodithioic acids are disclosed wherein:
A) the alkyl groups each contain from two to four carbon atoms and at least one alkyl group is a butyl group;
B) the total number of carbon atoms per phosphorus atom is less than 8;
C) from about 30 to 90 mole percent of the alkyl groups are primary alkyl groups;
D) from about 10 to 70 mole percent of the alkyl groups are secondary alkyl groups; and
E) the metal salt is a zinc, copper or iron salt, mixtures thereof, or a mixture of calcium salt and one or more of said metal salts;
provided that when only 2 alkyl groups are present, from about 30 to 80 mole percent of the alkyl groups are n-butyl groups, from about 20 to 70 mole percent of the said alkyl groups are isopropyl groups.
These metal salts are oil-soluble and are useful as antioxidants and anti-wear agents particularly in lubricating oil compositions.
公开了一种或多种二烷基
二硫代磷酸的某些
金属盐,其中
A) 每个烷基含有 2 至 4 个碳原子,至少一个烷基是丁基;
B) 每个
磷原子的碳原子总数少于 8 个;
C) 约 30 至 90 摩尔%的烷基是伯烷基;
D)约 10 至 70 摩尔%的烷基是仲烷基;以及
E)
金属盐是
锌、
铜或
铁盐,它们的混合物,或
钙盐和上述一种或多种
金属盐的混合物;
条件是当只有 2 个烷基存在时,约 30 至 80 摩尔%的烷基为正丁基,约 20 至 70 摩尔%的上述烷基为异丙基。
这些
金属盐是油溶性的,可用作
抗氧化剂和抗磨剂,特别是在润滑油组合物中。