SU1426972A1 - Bis-(hexylthioacetyl)-disulfide as functional additive to lubricants - Google Patents

Abstract

The invention relates to thiogonal compounds, in particular to bis (hexylthioacetyl) disulfide, which may be found. use as a multifunctional lubricant additive. The purpose of the invention is to synthesize a new compound, YKif, of a class possessing anti-corrosion, anti-wear and anti-wear properties. Bis- (hexylthioaethyl) -disulfide synthesized by interaction; mono-chloroacetylhexyl sulfide with sodium di-sulphide. The initial monochloroacetic-hexylsulfide was synthesized by the interactions: tviem chloride monochloroacetic acid with hexylthiols. Unlike the anticorrosive additives used in practice, this compound does not contain metal and is free from anticorrosive additives. 1 tab. with (g

Description

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This invention relates to a novel chemical compound, namely bis (exylthiopetyl) disulfide of formula

CjHo SC (O) CHaSSCHaC (O) SC6Hq, which can be used as a multifunctional lubricant additive.

The purpose of the invention is to find a new; compounds in the class of disulfides possessing high anti-corrosion, anti-wear and anti-seize properties, which are superior to; the known additive of J, J -dibutylxanthate of ethyl ester is more effective. ; Example. 119.4 g (0.1 mol) of monochloroacetylhexyl sulfide were placed in a three-necked flask, then 5.5 g (O., 05 mol) of sodium disulfide was added from a dropping funnel. The mixture was stirred for 7 hours at 70-80 ° C, then extracted with benzene, the reaction mixture was washed with water, dried, filtered and, after distilling off benzene, the residue was subjected to distillation under vacuum.

The final product has the following indicators: “„ 159-161 ° С / 0.65 mm Hg. Art.,; yield of 13.5 g (71.0%); On ° 1,5180; df 1.0766; MRD found 107.70, calculated 107.95. Found S / S: 33.30. Calculated, 0/0: S 33,51.

The structure of the synthesized compounds was confirmed by IR and PMR spectroscopy.

In the IR spectrum, absorption bands were detected, in the region of 1680 and 1730 cm, characteristic of the C 0 bond, v.722 and 460 cm -S-S-bond.

In the PMR spectrum of the bis- (hexylthioacetyl) disulfide, signals were detected that correspond to; at S 0.9 ppm (CHS); 6 1.2 ppm (CHj.); 2.9 ppm (CHj-S-); 3.6 ppm (-C-CH -S-).

The study of the effect of the synthesized compound on the functional properties of lubricating oils was carried out by adding this compound to oil M-11 (0.5, 1.0, 1, mass).

Anti-corrosive properties were tested on a DK-NA-MI apparatus at 140 ° C for 25 hours (GOST 20502-75), and the antiwear and anti-seize properties of the synthesized compound were determined on a four-ball friction machine (GOST 9490) using balls of steel grade Shch-15 with a diameter of 12.7 mm, the relative sliding speed of the friction surfaces is 0.54 m / s, and the rotational speed is 1420 rpm.

The test results are presented in the table.

As can be seen from the results of the comparative tests, the proposed compound with bis- (hexylthioacetyl) disulfide in anti-distant properties (E) significantly exceeds the previously synthesized compound. -dibutylxanthate of ethyl ether, on anti-wear properties (B) is at the same level, and on anti-corrosion properties slightly exceeds it. However, bis- (hexylthioacetyl) - disulfide anti-corrosive, anti-corrosion

wear and anti-seize survivals significantly exceeds the IHG1-21 additive developed in the industry (barium diaryldithiophosphoric acid salt

Claims (1)

Claims of the invention Bis- (hexylthioacetyl) -disulfide of formula C (, Hi3 SC (О) CHjSSCHjC (О) 5СбН "as a multifunctional lubricant additive.