SU682557A1 - Lubricating composition - Google Patents

Description

the second is not implemented steady state

friction or selective transfer mode.

Wear is determined by the gravimetric method

Differences in weight of samples before and after 5 hours; Lubricant properties and wear resistance of petroleum and synthetic bases with the addition of a mixture of methyl esters of synthetic fatty acids;

torture. The amount of wear includes running-in wear.

The data obtained for the studied compositions are given in table. 1 and 2.

Table I

Lubricating properties of mixtures of oils with esters and mixtures of methyl esters SFA С, о-С, в

table 2

Comparison of the results for the compositions of the same liquids with the addition of a mixture of methyl esters of synthetic fatty acids Cyu-Ci6 (Table 1) indicates a significant improvement in the lubricating properties of petroleum and synthetic substrates. At the same time, the load characteristics (Pmax), antifriction properties (ctr) and wear resistance (Jq) of the friction unit depend on the concentration of a mixture of fatty acid methyl esters. Concentrations corresponding to the maximum effectiveness of the additive are not practically dependent on the nature of the base and in the range of 10-30 wt. 7o. The maximum load (Ryax) due to the addition of the mixture of methyl esters of fatty acids Xyu-Ci6 can be increased 1.5-2 times compared to with original liquids. So for petrolatum and industrial 60% Pmts increases from 195 to 380 kg / cm or 2 times, and for PES-C-2 and XC-2-1 by 1.5 and 2.1 times, respectively. The coefficient of friction of the studied oils decreases with the addition of esters by 4–9 times, and the weight wear rate decreases by an order of magnitude compared with the corresponding values for pure liquids.

As follows from the data given in table. 1 and 2, the proposed composition significantly exceeds the compositions with pure esters in terms of stress and antifriction characteristics, and especially in anti-wear properties. Thus, the XC-2-1 liquid with the addition of 30% of the mixture of methyl esters of fatty acids, Xu-Xu has a 1.5 times greater maximum load and with this load 3 times less wear intensity for the bronze sample and 6 times for the steel sample.

The observed improvement in the lubricating properties of petroleum and synthetic oils when adding the Cie-Ci6 mixture of methyl esters of fatty acids is associated with the implementation of selective transfer in the steel-bronze friction unit, as evidenced by the presence of a thin copper film on the rubbing surfaces. So from the above

The data suggest that the lubricating properties of fundamentally different bases can be significantly improved by adding a mixture of methyl ethers of fatty acids Su-Ci6 due to the implementation of

selective transfer effect.

Taking into account that the mixture of methyl esters of Xyu Xiu fatty acids is by-products in the synthesis of various chemicals, they have a low cost and their addition to petroleum and synthetic bases will not cause a great rise in the cost of the finished lubricant composition.

Claims (2)

1.Vinogradov I.E. Antiwear additives for oils. M., “Himi, 1972, p. 148-149. 2.Vinogradova I.E. “Anti-wear additives for oils. M., “Himi, 1972, p. 151 - 154.