Melamine-based compounds for lubricating compositions
AssigneeAfton Chemical Corporation
InventorsSheng Jiang, Kearsley Dillon
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Abstract
Melamine-based compounds suitable, in one embodiment, as a corrosion inhibitor for lubricating compositions and, in particular, a corrosion inhibitor for transmission fluids (manual, automatic, dual-clutch, or electric), axle fluids, differential fluids, tractor fluids, industrial gear fluids, and/or lubricating fluids for other gear-type applications. The melamine-based compounds are in the form of oil-soluble hydrocarbyl-substituted melamine derivatives comprising the reaction product of a hydrocarbyl-substituted succinic anhydride reacted with melamine at conditions effective to form a hydrocarbyl-substituted melamine polycarboxylic acid or anhydride compound.
Claims21
A corrosion inhibitor in the form of an oil-soluble hydrocarbyl-substituted melamine derivative having the structure of Formula I
- wherein each of R1, R2, and R3 is, independently, —NH2, a hydrocarbyl-substituted succinimide group, or a hydrocarbyl-substituted dicarboxylic acid-amide group, and wherein one or two of R1, R2, and R3 is, independently, either the hydrocarbyl-substituted succinimide group or the hydrocarbyl-substituted dicarboxylic acid-amide group and the remaining R1, R2, and R3 is, independently, either the —NH2 or the hydrocarbyl-substituted dicarboxylic acid-amide.
A method of preparing an oil-soluble hydrocarbyl-substituted melamine derivative corrosion inhibitor comprising reacting a hydrocarbyl-substituted succinic acid or anhydride with melamine and with a molar excess of the hydrocarbyl-substituted succinic acid or anhydride relative to the melamine.
Dependencies are inferred from the claim text.