Disclosed is a lubricating composition having a major amount of an oil of lubrication viscosity and a minor amount of
(A) a nitrogen containing dispersant with a total base number of from 20 to 160 on an oil-free basis wherein the improvement comprises adding to said dispersant; the dispersant comprising a Mannich reaction product and/or a reaction product of a hydrocarbyl-substituted succinic acylating agent with ammonia or an amine;
(B) a sludge preventing/seal protecting additive of at least one aldehyde or epoxide or mixtures thereof.
Lubricating composition with improved bearing corrosion protection
申请人:The Lubrizol Corporation
公开号:EP0976815A2
公开(公告)日:2000-02-02
Disclosed is a composition for reducing the copper-lead bearing corrosion of a formulation that includes a major amount of an oil of lubrication viscosity and a minor amount of a corrosion-reducing additive comprising:
(A) a dispersant with a total base number of from 20 to 160 on an oil-free basis, with the proviso that the dispersant is substantially boron-free;
(B) a metal salt of a phosphorus acid; and
(C) a metal overbased composition comprising at least one carboxylate, phenate, or sulfonate wherein the metal is lithium, sodium, potassium, magnesium or calcium, and
(D) a borate ester.
Lubricating compositions with reduced bearing corrosion
申请人:The Lubrizol Corporation
公开号:EP0976814A1
公开(公告)日:2000-02-02
A composition for reducing the copper-lead bearing corrosion of an engine that includes a major amount of an oil of lubrication viscosity and a minor amount of a corrosion-reducing additive comprising
(A) a borated dispersant with a total base number of from 20 to 160 on an oil-free basis, selected from Mannich dispersants, succinimide dispersants or olefin-carboxylic/carboxylate dispersants;
(B) a metal salt of a phosphorus acid; and
(C) a metal overbased composition comprising at least one carboxylate, phenate, or sulfonate wherein the metal is lithium, sodium, potassium, magnesium or calcium, and
(D) a borate ester.
The borated ester and borated dispersant provide from 20 to about 800 parts per million (ppm) mass of boron in the composition.