C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
C10M 135/08 (2006.01) C10M 133/04 (2006.01) C10M 135/02 (2006.01) C10M 137/02 (2006.01) C10M 143/06 (2006.01) C10M 155/00 (2006.01) C10M 159/20 (2006.01) C10M 163/00 (2006.01)
Patent
CA 2112183
Title: LUBRICATING COMPOSITIONS, GREASES AND FUNCTIONAL FLUIDS CONTAINING SULFITE OR SULFATE OVERBASED SALTS Abstract of the Disclosure The invention includes a lubricating composition comprising a major amount of an oil of lubricating viscosity, and a minor amount of (A) a sulfite or sulfate overbased or borated overbased metal salt of an acidic organic compound, whereinthe lubricating composition contains less than 1.5 % by weight of an ashless dispersant which is the reaction product of a polyisobutene substituted succinic anhydride and a polyamine, and provided that when (A) is a sulfate overbased or borated overbased metal salt, then the lubricating composition includes (B) at least one phosphorous of boron antiwear/extreme pressure agent, or (C) a sulfur compound. The invention also includes grease and functional fluids containing the sulfite and sulfate overbased metal salts. These composition have improved antiwear, antiweld, and extreme pressure properties.
Cahoon John M.
Huang Nai Z.
Karn Jack L.
Ridout & Maybee Llp
The Lubrizol Corporation
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