C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
C10M 141/12 (2006.01) C10M 163/00 (2006.01)
Patent
CA 2278905
1. 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 borated dispersant with a total base number of from 20 to 160 on an oil-free basis; (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 wherein the improvement comprises (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.
Shanklin James R.
Stachew Carl F.
Ridout & Maybee Llp
The Lubrizol Corporation
LandOfFree
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