摘要:
The present invention relates to a composition comprising alkylated diphenylamines of the structural formulas (I), (II), (III), and (IV), to industrial products such as additive blends, engine oils, and polymer compositions comprising the mixture of alkylated diphenylamines, and to the use of the mixture as an additive such in industrial products such as additive blends, engine oils and polymer compositions: wherein R is a branched C4-C16-alkyl group, and wherein the total amount of tetra-alkylated diphenylamines of the structural formula (IV) is in the range from 0.20 to 3.5 wt.%, based on the total weight of alkylated diphenylamines of the structural formula (I), (II), (III), and (IV) in the composition.
摘要:
Lubricating compositions are described, the lubricating compositions comprising a base oil component and an additive component, wherein the additive component comprises a non-silicone anti-foaming agent.
摘要:
Lubricating compositions are described, the lubricating compositions comprising a base oil component and an additive component, wherein the additive component comprises a non-silicone anti-foaming agent.
摘要:
A lubricating composition includes an oil of lubricating viscosity, an N-alkyl naphthylamine, and at least one ashless antioxidant selected from a diarylamine antioxidant, a phenolic antioxidant, and mixtures thereof. The lubricating composition has a phosphorus content of less than 0.15 weight percent. The combination of the N-alkyl naphthylamine and ashless antioxidant provides a beneficial effect on the basicity of the composition without negatively impacting seals performance.
摘要:
Diaryl amines are selectively alkylated by reaction with branched olefins, which olefins are capable of forming tertiary carbonium ions and can be conveniently prepared from readily available branched alcohols. The diaryl amine products of formula X are effective antioxidants and often comprise a high amount of di-alkylated diaryl amines and a low amount of tri- and tetra-alkylated diaryl amines. The diaryl amines of formula X wherein and Ar2 are phenyl or naphthyl are substituted by at least one group of formula IV containing from 6 to 16 carbon atoms.
摘要:
Liquid diphenylamine compositions comprising predominately p , p '-di-alkylated diphenylamines and low amounts of mono-alkylated diphenylamines are prepared by adding an olefin to a mixture comprising mono-alkylated diphenylamines, di-alkylated diphenylamines, Lewis acid catalyst and an amount of another olefin sufficient to suppress dealkylation of the alkylated diphenylamines.