SU819155A1 - Lubricating composition - Google Patents

Description

(54) LUBRICATING COMPOSITION

The invention relates to lubricating oils and lubricants based on them and can be used in machine building and instrument making to increase the wear resistance of steel-alloy copper friction units through the implementation of selective transfer.

Known glycerin and alcohol-glycerin mixtures 1, as well as lubricant compositions of NIIFOH-2 based on polyorganosiloxane fluid with the addition of salicilal-parachloroaniline 2 and NIIFOH-3 based on mineral oil with the addition of the same additive 3, which are used to lubricate the steel-alloy friction steam copper and provide a pair of selective transfer mode, ie, stable mode with a low coefficient of friction and minimal wear of friction pairs.

A disadvantage of the lubricating compositions is the insufficiently high load, anti-friction and anti-wear characteristics.

Also known is a lubricant composition of Scientific Research Institute of Hydrophysiological Chemistry-4 on the basis of a mineral or synthetic oil with the addition of 1- (2 pyridylazo) -2-naph tola 4.

However, its lubricating properties are not high enough.

The aim of the invention is to improve the load, antifriction and anti-wear properties of oils and lubricants based on them for steel-alloy copper friction units.

This goal is achieved in that the composition based on petroleum or synthetic oil with the addition of an additive according to the invention contains as an additive adipic acid ester and € 4-Cd aliphatic alcohol and 2- (p-toluenesulfamino) -benzal-l-toluidine, with the ratio of components, weight. %:

2- (l-toluensulfamino) -benzal-p-toluidin0, 05-0.3

The ester of adipic acid and aliphatic alcohol 20-30 Oil or synthetic oil The rest of the 2- (p-toluenesulfamino) -benzal-l-toluidine has the formula (1)

v / NH-SO,

I II / z:

25

  N -) - CH,

and get it in a known way. 30 Esters are added to the composition;

as

to improve lubricating properties, and to improve the solubility of the additive (1). A concentration below 20% is insufficient for normal dissolution of the additive (1), and a concentration above 30% slightly improves the lubricity (see table), but leads to a significant increase in the cost of the composition. The most rational supplement of 20-30% ether.

For the preparation of compositions, petroleum or synthetic oils of various chemical structure and physicochemical properties are used: petrolatum, industrial 50, industrial 20, instrument MVP, vacuum VM 4, ether 2 (esters of pentaerythritol and fatty acids), polyethylsiloxane liquid 132- 25

The oils are mixed with adipic acid esters and 2- (l-toluenesulfamino) -beisal-l-toluidine in the above proportions by heating to 100-110 ° C and vigorous stirring. After cooling to room temperature, a ready-to-eat butter is obtained.

Lubricating properties examined on the machine face friction. Movable specimens with a diameter of 5 mm are made of bronze БР ОФ 6-0.25, fixed from steel 45. The volume of the oil bath is 35-40 cm. The average sliding speed is 0.8 m / s. Step loading. The test duration is 5 hours. Samples are treated to grade 8 purity and degreased with diethyl ether and acetone. The maximum load of the Ptahs (the load above which the stable friction mode or the selective transfer mode is not realized) and the torque over which the coefficient of friction was calculated are recorded. Wear is determined by a gravimetric method based on the difference in weight of the samples before and after 5 hours of testing. The weighting intensity of wear is determined by the formula.

/, q / Sn L

where o is the weight loss of the samples; S ,, is the contact area;

L is the way of training.

The data obtained for the research compositions of XFT-3 are shown in the table.

Continuation

Claims (2)

Claim Here, for comparison, test data for the NIIFOH-4 lubricant composition (composition 1 based on liquid paraffin with the addition of 0.05 wt.% 1- (2-pyridylazo) -2-naphthol and composition 2 based on the poly-5 ethyl siloxane liquid with the addition of the same additive). The table in column 5 shows the concentration of 2- (7g-toluenesulfamino) benzal - “- tol at id and na. 10 Comparison of the results for the proposed compositions and the composition NIIFOH-4 indicates a significant improvement in load, antiwear and antifriction properties. fifteen Moreover, the lubricating properties depend on the concentration of 2- (i-toluenesulfaminobenzal-p-toluidine in the oil-ester mixture. Concentrations corresponding to the maximum efficiency of the additive, 20 are practically independent of the nature of the oil and lie in the range of 0.05-0.3 weight .%. The maximum load of the proposed compositions increases by 1.4-1.7 times with the same, and in many cases, a lower coefficient of friction, in comparison with the data on the composition of NIIOFHO-4. A decrease in the weight intensity of wear by 1.2–2 times for bronze samples and by 2–8 times for 30 steel samples is also observed. Thus, it follows from the data in the table that the lubricating properties of oils of various nature are improved by the addition of adipic acid esters 35 and 2- (p-toluenesulfamino) -benzal-p-toluidine in the joint presence. A lubricating composition based on petroleum or synthetic oil with the addition of an additive, characterized in that, in order to improve the load, anti-slip and anti-friction properties of the composition, it contains, as an additive, an ester of adipic acid and aliphatic alcohol C ₄ —Cd and 2- (p-toluenesulfamino) -benzal-p-toluidine in the following ratio, wt. %: 2- (p-toluenesulfamino) benzal-p-toluidine 0.05-0.3 Adipic acid ester of aliphatic alcohol C ₄ —C _e 20-30 Petroleum or synthetic oil Else