Dielectric fluids comprising natural bio-sourced oil with increased stability
AssigneeCargill, Incorporated
InventorsTodd L. Kurth, Kevin R. Wirtz
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Abstract
A dielectric fluid is provided comprising a natural bio-sourced oil and one or more compounds selected from the group consisting of phosphite compounds. It has been discovered that addition of one or more compounds selected from the group consisting of phosphite compounds to dielectric fluids comprising oil impart a stabilizing effect that reduces, inhibits or prevents formation of stray gases in the dielectric fluid during ordinary use.
Claims22
A dielectric fluid comprising a natural bio-sourced oil, a phosphite component comprising one or more phosphite compounds, a non-phosphite antioxidant component selected from one or more non-phosphite antioxidant compounds and a metal passivator, wherein the phosphite component is selected from phosphite compounds having one to three aryloxy groups, the non-phosphite antioxidant component is butylated phenol and the metal passivator is benzotriazole or its derivatives, and wherein the natural bio-sourced oil is soybean oil,
- and wherein the phosphite component is present in an amount sufficient to reduce the stray gassing of the dielectric fluid as determined by dissolved gas analysis by at least 60% as compared to a like dielectric fluid composition that does not contain a phosphite component, wherein the stray gas is H2, ethane, methane or ethylene, wherein the gas analysis is conducted by ATSM D3612-02, Method C.
Dependencies are inferred from the claim text.