Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Organic phosphorus compound – wherein the phosphorus is...
Patent
1995-12-22
1996-12-10
Howard, Jacqueline V.
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Organic phosphorus compound, wherein the phosphorus is...
C10M13512
Patent
active
055827608
ABSTRACT:
This invention relates to synthetic based turbo oils, preferably polyol ester-based turbo oils which exhibit exceptional load-carrying capacity by use of a synergistic combination of sulfur (S)-based and phosphorous (P)-based load additives. The S-containing additive of the present invention is alkylthiosuccinic acid, preferably C.sub.4 -C.sub.12 linear alkyl thiosuccinic acid and the P-containing additive is one or more amine phosphate(s). The turbo oil composition consisting of the dual P/S additives of the present invention achieves an excellent load-carrying capacity, which is better than or equivalent to that obtained when each additive was used alone at a comparable treat rate to the total P/S additive combination treat rate, and this lower concentration requirement of the P and S additives allows the turbo oil composition to meet or exceed US Navy MIL-L-23699 requirements including Oxidation and Corrosion Stability and Si seal compatibility.
REFERENCES:
patent: 3859218 (1975-01-01), Jervis et al.
patent: 4130494 (1978-12-01), Shaub et al.
patent: 4455429 (1984-06-01), Gutierrez et al.
patent: 4600519 (1986-07-01), Gutierrez et al.
Brois Stanley J.
Cameron Stephen D.
Kim Jeenok T.
Polizzotti Richard S.
Allocca Joseph J.
Exxon Research and Engineering Company
Howard Jacqueline V.
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