| 摘要 |
This invention relates to additives for oleaginous fluids containing extreme pressure and antiwear agents and containing less than 15 GC area percent higher dialkyl polysulfides and to a process for their production comprising: a) forming a first reaction mass comprising olefin, a sulfur source, and a catalyst; b) heating the first reaction mass to a temperature and for a period of time which is sufficient to form a mixture of dialkyl disulfides, dialkyl trisulfides and higher dialkyl polysulfides; c) forming a second reaction mass comprising the mixture of dialkyl disulfides, dialkyl trisulfides and higher dialkyl polysulfides formed in step (b), an organo phosphorus compound, and optionally an amine; d) heating the second reaction mass to a temperature and for a period of time which are sufficient to convert at least a portion of the higher dialkyl polysulfides to dialkyl trisulfide; and e) recovering said mixed additive containing extreme pressure agents and antiwear agents, wherein said recovered mixed additive contains less than 15 GC area percent higher dialkyl polysulfides.
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