Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Organic compound containing boron
Patent
1993-04-09
2000-08-01
McAvoy, Ellen M.
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Organic compound containing boron
508287, 508322, 508433, 508438, 508567, C10M14110
Patent
active
060966912
ABSTRACT:
The concentrates comprise specified proportions of diluent oil, an organic sulfur-containing antiwear and/or extreme pressure agent, an ashless dispersant, a dimethyl ester of an aliphatic phosphonic acid in which the aliphatic group has an average in the range of about 12 to about 24 carbon atoms, and a 3-hydrocarbyl-2,5-diketopyrrolidine in which the hydrocarbyl group is an alkyl or alkenyl group having an average in the range of about 12 to about 30 carbon atoms. By using weight ratios of diketopyrrolidine to the dimethyl phosphonate of at least 3:1, the concentrate remains homogeneous at temperatures at least as low as 12.degree. C. When utilized as a top treat in gear oils formulated with conventional GL-4 and GL-5 gear additive packages substantial improvements in limited slip axle performance can be realized.
REFERENCES:
patent: 3382172 (1968-05-01), Lowe
patent: 4158633 (1979-06-01), Papay
patent: 5126064 (1992-06-01), Barber et al.
patent: 5176840 (1993-01-01), Campbell et al.
patent: 5225093 (1993-07-01), Campbell et al.
Smalheer et al, "Lubricant Additives" pp. 1-11, 1967.
Conary Gregory S.
Hartley Rolfe J.
Ethyl Corporation
Hamilton Thomas
McAvoy Ellen M.
Rainear Dennis H.
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