Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Heterocyclic ring compound; a heterocyclic ring is one...
Patent
1995-03-07
1999-12-21
Medley, Margaret
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Heterocyclic ring compound; a heterocyclic ring is one...
508376, 508375, 508380, 508435, C10M16100, C10M14500
Patent
active
060049103
ABSTRACT:
A lubricating oil having an ashless nitrogenous TBN source together with ash containing detergent having a TBN in excess of 100, a source of magnesium, and metal dihydrocarbyl dithiophosphate with predominantly or exclusively secondary hydrocarbyl groups is described. It comprises a major amount of an oil of lubricating viscosity having a sulfated ash content between 0.35 and 2 mass percent and A) a nitrogenous TBN source selected from the group consisting of ashless nitrogen containing dispersants, ashless nitrogen containing dispersant viscosity modifiers, oil soluble aliphatic, oxyalkyl, or arylalkyl amines and mixtures thereof; B) a metal salt of an oil soluble acid having a TBN in excess of 100; C) at least 500 ppm (mass) magnesium; and D) at least one metal dihydrocarbyl dithiophosphate. The nitrogenous TBN source provides at least about 1.5 TBN to the finished lubricant. The metal salt of an oil soluble acid provides at least about 40% of the total TBN of the composition. At least 50 mole per cent of the hydrocarbyl groups on the dithiophosphate are secondary. Overbased magnesium sulfonate may be used as the metal salt of an oil soluble sulfonic acid having a TBN in excess of 100 and the additive providing at least 500 ppm (mass) magnesium. The lubricant may be free of aromatic amines having at least two aromatic groups attached directly to the nitrogen. It may have at least 100 ppm (mass) boron and at least 1000 ppm (mass) phosphorous. The boron-to-nitrogen ratio is at least 0.1.
REFERENCES:
patent: 4904401 (1990-02-01), Ripple et al.
patent: 4938880 (1990-07-01), Waddoups et al.
patent: 4941984 (1990-07-01), Chamberlin et al.
patent: 4957649 (1990-09-01), Ripple et al.
patent: 4981602 (1991-01-01), Ripple et al.
patent: 5102566 (1992-04-01), Fetterman et al.
patent: 5141657 (1992-08-01), Fetterman et al.
patent: 5202036 (1993-04-01), Ripple et al.
patent: 5320765 (1994-06-01), Fetterman et al.
Mack Truck Technical Services Standard Test Procedure No. 5GT 57 "Mack T-7: Diesel Engine Oil Viscosity Evaluation", Aug. 31, 1984 ("Mack T-7").
Mack Truck Technical Services Standard Test Procedure No. 5GT 76 "Mack T-8: Diesel Engine Oil Viscosity Evaluation", Oct. 1993 ("Mack T-8").
PCT Search Report dated Sep. 5, 1995 for PCT/US95/05/25.
Bloch Ricardo Alfredo
Lapinas Arunas T.
Outten Edward F.
Ritchie Andrew James Dalziel
Waddoups Malcolm
Exxon Chemical Patents Inc.
Medley Margaret
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