Dialkyl sulfide, method for producing dialkyl sulfide, extreme-pressure additive, and lubricating fluid composition
AssigneeDIC Corporation
InventorsYuuki Yoneda, Hiroshi Sakata
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Abstract
An object of the present invention is to provide a dialkyl sulfide which can effectively form a metal sulfide film on a metal surface even in a low-temperature environment, has excellent storage stability, and is suitable as an extreme-pressure additive. The present invention provides a dialkyl sulfide represented by general formula (1) below (in the formula, R1 and R2 each independently represent an alkyl group, and n is an integer), wherein the content of a compound having an n value of 1 in the general formula (1) is 10.0% by mass or less relative to the total amount of compounds represented by the general formula (1)
Claims20
A dialkyl sulfide represented by general formula (1) below
- (in the formula, R1 and R2 each independently represent an alkyl group, and n is an integer),
- wherein the content of a compound having an n value of 1 in the general formula (1) is 10.0% by mass or less relative to the total amount of compounds represented by the general formula (1), the total of the content of a compound having an n value of 2 in the general formula (1), the content of a compound having an n value of 3, and the content of a compound having an n value of 4 is 50.0% to 70.0% by mass relative to the total amount of compounds represented by the general formula (1), and the total of the content of a compound having an n value of 5 in the general formula (1), the content of a compound having an n value of 6, the content of a compound having an n value of 7, and the content of a compound having an n value of 8 is 30.0% to 40.0% by mass relative to the total amount of compounds represented by the general formula (1).
A method for producing a dialkyl sulfide, the method comprising a first step of reacting a monosubstituted 1-olefin compound (a) with sulfur (b) in the presence of hydrogen sulfide (c) at a molar ratio [(a)/(b)] within a range of 0.6 to 2 in a reaction system of 60° C. to 130° C.;
- and a second step of maintaining the reaction system at 160° C. to 200° C.
Dependencies are inferred from the claim text.