Gear oil lubricants of enhanced friction properties

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

1994-03-01

1996-02-20

Howard, Jacqueline V.

Compositions

Electrolytes for electrical devices

252 32007E, 252 45, 252 49006, C10M13710, C10M13510

Patent

active

054926386

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-containing 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.

REFERENCES:
patent: 4218330 (1980-08-01), Shubken
patent: 4917809 (1990-04-01), Zinke et al.
patent: 5037567 (1991-08-01), Farng et al.
patent: 5110488 (1992-05-01), Lipton et al.
patent: 5135670 (1992-08-01), Johnson et al.
patent: 5262076 (1993-11-01), Ishida et al.
patent: 5326488 (1994-07-01), Minokami et al.

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