High load-carrying turbo oils containing amine phosphate and...

Details High load-carrying turbo oils containing amine phosphate and... High load-carrying turbo oils containing amine phosphate and...

C - Chemistry, Metallurgy

10

M

C10M 141/00 (2006.01) C10M 135/34 (2006.01) C10M 137/08 (2006.01) C10M 141/10 (2006.01) C10M 169/04 (2006.01)

Patent

CA 2192377

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 thiophene carboxylic acid (TCA) derivatives, preferably TCA per se or thiophene C1-C4 alkanoic 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 higher treat rate than the total P/S additive combination treat rate, and this lower concentra- tion requirement of the P and S additive allows the turbo oil composition to meet or exceed US Navy MIL-L-23699 requirements including Oxidation and Corro- sion Stability and Si seal compatibility.

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