Gear oil lubricants of enhanced friction properties

Details Gear oil lubricants of enhanced friction properties Gear oil lubricants of enhanced friction properties

C - Chemistry, Metallurgy

10

M

C10M 159/16 (2006.01) C10M 135/04 (2006.01) C10M 135/10 (2006.01) C10M 137/00 (2006.01) C10M 139/00 (2006.01) C10M 163/00 (2006.01) C10M 167/00 (2006.01)

Patent

CA 2119203

ABSTRACT The frictional properties of gear oils are improved by including at least one overbased alkali or alkaline earth metal carboxylate, sulphonate or sulphurized phenate having a TBN of at least 200 in a gear oil which comprises: oil of lubricating viscosity at least 80% by volume of which is mineral oil, synthetic ester oil or a mixture thereof; Mannich base ashless dispersant; metal-free, sulphur-con- taining antiwear and/or extreme pressure agent; and metal- free, phosphorus-containing and nitrogen-containing antiwear and/or extreme pressure agent. The resultant gear oils exhibit excellent performance when used in synchromesh-based transmissions.

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