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AssigneeDIC Corporation
InventorsTakafumi Iba, Hiroshi Sakata
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The present invention provides a dialkyl polysulfide which can be suitably used as an extreme pressure additive that can be added to a lubricant in a wide range of amounts, that enables effective formation of a film of a metal sulfide on a metal surface, and that is less likely to cause corrosion of the metal surface. In particular, provided is a dialkyl polysulfide containing compounds represented by General Formula (1) (where R1 and R2 each represent an alkyl group, and n is an integer from 1 to 6), wherein the total content of a compound in which n in General Formula (1) is 2 and a compound in which n in General Formula (1) is 3 is in the range of 80 to 100 mass % relative to the entire amount of the compounds represented by General Formula (1).
1-14. (canceled)
A dialkyl polysulfide comprising compounds represented by General Formula (1) and produced by a method including a first process in which a 1-olefin compound (a) having a linear end is allowed to react with sulfur in the presence of a hydrogen sulfide to obtain a dialkyl polysulfide (A) and a second process in which the dialkyl polysulfide compound (A) is allowed to react with a sulfide of an alkali metal to reduce the number of sulfur atoms contained in the dialkyl polysulfide (A)
A method for producing a dialkyl polysulfide, the method comprising a first process in which a 1-olefin compound (a) having a linear end is allowed to react with sulfur in the presence of a hydrogen sulfide to obtain a dialkyl polysulfide (A) and a second process in which the dialkyl polysulfide compound (A) is allowed to react with a sulfide of an alkali metal to reduce the number of sulfur atoms contained in the dialkyl polysulfide (A).
A method for producing a lubricating fluid composition, the method comprising a process for obtaining a dialkyl polysulfide containing compounds represented by General Formula (1), the process including a first step in which a 1-olefin compound (a) having a linear end is allowed to react with sulfur in the presence of a hydrogen sulfide to obtain a dialkyl polysulfide (A) and a second step in which the dialkyl polysulfide compound (A) is allowed to react with a sulfide of an alkali metal to reduce the number of sulfur atoms contained in the dialkyl polysulfide (A)
Dependencies are inferred from the claim text.