ULTRA LOW PHOSPHORUS LUBRICANT COMPOSITION

摘要

A low-phosphorus lubricating composition has less than 600 ppm phosphorus, comprising at least 85 weight % of a lubricating base blend, and an additive comprising the following, as weight % of the total composition:
(1) an organomolybdenum compound at an amount which provides about 0.1-800 ppm Mo;(2) a hindered phenol at about 0.1-2%; and(3) a dithiocarbamate at about 0.1-2%;with a first proviso that where the dithiocarbamate does not comprise a metal dithiocarbamate, the additive additionally comprises:(4) an alkylated diphenylamine at about 0.1-2%,and with a second proviso that where the organomolybdenum compound comprises molybdenum dithiocarbamate, it is considered a metal dithiocarbamate for purposes of the first proviso, but is considered an organomolybdenum compound for the purposes of calculation of the amount present in the total composition.

主权项

1. A low-phosphorus lubricating composition having less than 600 ppm phosphorus, comprising at least 85 weight % of a lubricating base blend, and an additive comprising the following, as weight % of the total composition:
(1) an organomolybdenum complex prepared by reacting about 1 mole of fatty oil, about 1.0 to 2.5 moles of diethanolamine and a molybdenum source sufficient to yield about 0.1 to 12.0 percent of molybdenum, at an amount of the complex which provides about 400-800 ppm Mo; (2) a hindered phenol component consisting of a non-methylene-bridged sterically hindered phenol at about 0.25-1.5%; and (3) a zinc dithiocarbamate at about 0.15-0.5%; and (4) alkylated diphenylamine at about 0.5-1.5%.