SU810771A1 - Lubricating composition - Google Patents

Description

(54) LUBRICATING COMPOSITION

The invention relates to lubricating oils and lubricants based on them and can be used in engineering and instrumentation to increase the wear resistance of steel-to-steel friction units for implementing selective transfer. Glycerol and LlJ alcohol-glycerin mixtures are known, as well as the NIIFOH-2 lubricant compositions based on polyorganosiloxane fluid with salicylparachlororaniline depot. NIIFOH-3 - based on mineral oil with the addition of the same EZZ additive, which are used to lubricate steel-alloy and copper friction pairs and ensure the operation of the pair, in selective transfer mode, i.e., stable mode with low coefficient of friction and minimal wear steam training. Lubricating compositions have non-essential high load, anti-friction and anti-wear characteristics. A lubricant composition based on mineral or synthetic oil with the addition of 1- (2-pyridine-azo) -2-naphthol L4J is also known. 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 friction units. This goal is achieved by the fact that a composition based on petroleum or synthetic oil with the addition of an additive according to the invention contains as an additive phthalic acid ester and C-Cj aliphatic alcohol and 2- (J-iso nigros-o - "ian) -methylbenz- imidazole in the following ratio of components, wt.%: 2- (ct -Izonitro- "((.-cyan) -methylbenzimidazole 0.05-0.2 Phthalic acid ester and aliphatic alcohol C-Cg20-30

Oil or synthetic oil Rest 2- (oL-Isonitroaoot-cyan) -methyl-

benzimidazole has the following form:

lu (i)

 ,: NOH

. ..NOH

.A - C

I and

Esters are added to the composition both to improve lubricating properties and to improve the solubility of the asca (H). A concentration below 20% is insufficient for normal dissolution of the additive (1), and a concentration above 30% insignificantly improves the lubricity (see table), but leads to a significant increase in the cost of the composition. The most rational addition of 2-30% of the ether.

For the preparation of compositions, petroleum or synthetic oils of various chemical structure and physicochemical properties are used: petrolatum, industrial-50, industrial-2O, instrument MVP, vacuum VM-4, ether-2 (Esters of pentaerythritol and fatty acids); polyethylene siloxane fluid 132-25. The oils are mixed with phthalic acid esters and 2- {cC-iso-nitroso-P-cyan) methylbenzimidazole in the indicated proportions when heated to 1OO-110 C and vigorous stirring. After cooling to room temperature, a ready-to-use butter is obtained.

Lubricating properties examined on the machine face friction. Movable specimens with a diameter of 5 mm were manufactured; they were recovered from bronze with a BR of 6-0.25; stationary of steel 45. The volume of oil bath is 3540 cm, average sliding speed is 8 m / s, loading is stepped, test duration is 5 hours. Samples are processed to the 8th class of purity and degreased with diethyl ether and acetone. The maximum load is fixed (load, above which is not implemented

a stable friction mode or selective transfer mode) and a torque according to which the friction coefficient was calculated. Wear is determined by a gravimetric method based on the difference in weight of the samples before and after the 5-hour test. The weighting intensity of wear is determined by the form

,

Where

 - weight loss of samples; Sin is the contact area;

B is the way of training

The data obtained for the investigated compositions are listed in the table. Here are also presented for comparison the test data of the lubricant composition NIIFOH-4 (composition 1-vaseline oil + + 0.05% 1- (2-pyridylazo) -2-naphthol and composition 2 - polyethylsiloxane liquid with the addition of the same additive. In concentration above 0.2% of the additive in the composition does not dissolve.Comparison of the results for the proposed compositions and compositions of NIIFOH-4 indicates a significant improvement in the load-resisting and antifriction properties.

The lubricating properties depend on the concentration of 2- (oC-isonitroso-ot-cyan) methylbenzimidazole in the oil-ester mixture. Concentrations corresponding to the maximum effectiveness of the additive are practically independent of the nature of the oil and lie in the range of 0.05-0.2%. The maximum load of the proposed compositions increases 1.3-1.6 times with the same, a- in many cases: and a lower coefficient of friction compared with the data on the composition of the Institute for Physics and Chemical Physics-4.

The observations also show a decrease in the weight wear rate of 1.2–2.2 times for bronze samples and 2–8 times for steel samples.

Thus, from the data presented in the table, it follows that the lubricating properties of various inherent oils are improved by the joint addition of esters of phthaluric acid and 2-f cA-isonitroso-ohl) -methylbenzene "aaaol.

VM-4

20

Ether-2

132-25

132-25 fluid

810771

8 sequel to gablis.-i

390

0,018

11.21

11.15

Claims (1)

Form m; for the invention. Lubricating composition based on petroleum or synthetic oil with added ·. additives, which differs from the fact that, in order to improve the load, antiwear and antifriction properties of the composition, it contains as an additive a phthalic acid ester and aliphatic alcohol · С ^ - ^and 2- (оС-isonitrozo-о6-cyan )? - me. tnlbenzimidazole in the following ratio of components, wt.%: . 2 — CoL-Isonitrozo — L — cyan) —methylbenzimidazole Phthalic acid ester of aliphatic alcohol Sph — Cd Petroleum or synthetic oil 0.05-0.2 20-30 The rest