摘要:
A process for preparing an oligomeric phenolic detergent composition comprising contacting an oil soluble alkylphenol with an alkaline earth metal base, an alpha amino acid, and a C 1 to C 6 aldehyde, in the in the presence of a C 2 to C 6 alkylene glycol and a C 2 to C 4 carboxylic acid; and reacting under reactive conditions at a temperature of from 150°C to 225°C. The oligomeric phenolic detergent product can be employed in a lubricating oil.
摘要:
A process for preparing an oligomeric phenolic detergent composition comprising contacting an oil soluble alkylphenol with an alkaline earth metal base, an alpha amino acid, and a C 1 to C 6 aldehyde, in the in the presence of a C 2 to C 6 alkylene glycol and a C 2 to C 4 carboxylic acid; and reacting under reactive conditions at a temperature of from 150°C to 225°C. The oligomeric phenolic detergent product can be employed in a lubricating oil.
摘要:
The present invention is directed to a crankcase lubricating oil composition for protection of silver bearings in locomotive diesel engines comprising (A) a major amount of an oil of lubricating viscosity, and (B) a silver wear protection additive composition, and (C) one or more detergents. The silver wear protection additive composition of the present invention comprises a mixture of (i) a hydrocarbylamine salt of a di-alkyl di-thiophosphoric acid and (ii) a hydrocarbylamine salt of an alkyl acid phosphate.