C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
C10M 141/00 (2006.01) C10M 135/36 (2006.01) C10M 137/08 (2006.01) C10M 141/10 (2006.01) C10M 169/04 (2006.01)
Patent
CA 2192376
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 2-alkylthio- 1,3,4-thiadiazole-5 alkanoic acid (ATAA) obtained by reacting 2,5-dimercapto- 1,3,4 thiadiazole (DMTD) with alkyl bromide and subsequently reacting the intermediate with haloalkanoic acid. 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 a superior load-carrying capacity over that obtained when each additive was used alone at individual treat rates higherthan the total additive combination treatrate, and also meets or exceeds US NavyMIL-L-23699 requirements including Oxidation and Corrosion Stability and Si seal compatibility.
Beltzer Morton
Kim Jeenok T.
Borden Ladner Gervais Llp
Bp Exploration & Oil Inc.
Exxon Research And Engineering Company
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