Stabilized fluids for industrial applications
AssigneeE. I. Du Pont de Nemours and Company
InventorsHARI BABU SUNKARA, Raja Hari Poladi
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Abstract
The present invention is directed toward compositions suitable for use as dielectric fluids, lubricant fluids and biodiesel fluids. Compositions described herein are obtained from a saturated, unsaturated or combinations of both monol, diol, triol or polyol acyl ester based fluid and/or a non-ester based fluid and 2,4,6-tris(di-C1-C6-alkylaminomethyl)phenol and/or the carboxylic acid salt of 2,4,6-tris(di-C1-C6-alkylaminomethyl)phenol. These compositions demonstrate improved oxidative stability and/or hydrolytic stability at higher use temperatures.
Claims11
A stabilized aminophenolic composition comprising:
- (a) a 2,4,6-tris(di-C1-C6-alkylaminomethyl)phenol (TAP);
- and
- (b) at least one component selected from the group consisting of:
- (i) an ester based fluid comprising esters of mono-, di-, tri- or polyhydroxyl alcohols;
- and
- (ii) at least one mono C12-C30 carboxylic fatty acid in a molar ratio of up to 3 moles of mono C12-C30 carboxylic fatty acid per mole of TAP such that a salt is formed from the mono C12-C30 carboxylic fatty acid and the TAP;
- and
- wherein the stabilized aminophenolic composition is characterized in that the stabilized aminophenolic composition has improved stability relative to the TAP alone and the improved stability being demonstrated by at least one of the following performance metrics wherein:
- (aa) an extrapolated onset of thermal decomposition of the TAP in the stabilized aminophenolic composition occurs at a higher temperature than the extrapolated onset of thermal decomposition of the substantially pure TAP as measured by thermogravimetric analysis (TGA) ASTM E2402-11;
- or
- (bb) the stabilized aminophenolic composition has an oxidative stability index (OSI) of greater than about 20 hours at 130° C. as measured by AOCS 12b-92.
Dependencies are inferred from the claim text.