Dihydrocarbyl substituted phenylenediamine-derived phenolic products as antioxidants
AssigneeMobil Oil Corporation
InventorsL. Oscar Farng, Andrew G. Horodysky
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Abstract
A lubricating oil, grease or fuel composition contains an antioxidant amount of a Mannich base reaction product of an N-hydrocarbyl-substituted-phenylenediamine or an N,N'-dihydrocarbyl-substituted phenylenediamine such as N,N'-di-sec-butyl-para-phenylenediamine, an aldehyde or ketone and a hindered phenol such as 2,6-di-tert-butylphenol.
Claims18
A fuel composition comprising a fuel and an antioxidant amount of a reaction product of a hydrocarbyl-substituted phenylenediamine, in which the hydrocarbyl substituents contain from 4 to 60 carbon atoms, a carbonyl compound and a di-hydrocarbyl-substituted hindered phenol whereby the reaction product has improved fuel solubility properties.
A fuel composition comprising a major amount of a fuel and an amount sufficient to impart antioxidant and anticorrosion properties to the fuel of a reaction product of a phenylenediamine which is selected from the group consisting of N,N'-di-sec-butyl-p-phenylenediamine and N,N'-bis(1,4-dimethylpentyl)-p-phenylenediamine, a carbonyl compound having the following structural formula:
- R.sub.3 R.sub.4 C.dbd.o
- where R.sub.3 and R.sub.4 are the same or different, hydrogen atom, hydrocarbyl containing 1 to 60 carbon atoms or at least one heteroatom such as oxygen, sulfur or nitrogen and a dihydrocarbyl-substituted hindered phenol compound whereby the reaction product has improved fuel solubility properties.
A method of making a fuel composition comprising combining a major amount of a fuel and a minor additive amount of a reaction product having antioxidant properties comprising a reaction product of a hydrocarbyl-substituted phenylenediamine compound in which the hydrocarbyl substituent contains 4 to 60 carbon atoms, a carbonyl compound and a di-hydrocarbyl-substituted hindered phenol whereby the reaction product has improved fuel solubility properties.
Dependencies are inferred from the claim text.