SU825593A1 - Lubricating composition - Google Patents

Description

one

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

Known are glycerin and alcohol-glycerol mixtures l, as well as lubricant compositions of Scientific Research Institute of Hydrochemical Physics-2 based on polyorganosiloxane fluid with the addition of salicylal-p-chloroaniline 2, Scientific-Research Institute of Chemical Physics-3 on the basis of petroleum oil or. synthetic oil with the addition of 1- (2-pyridylazo) -2-b-naphthol 4.

A disadvantage of lubricating compositions is their low anti-friction and anti-wear characteristics.

A lubricant composition based on oil and synthetic oils with the addition of adipic acid esters and is also known. About 1-0.3 wt.% 2-hydroxy-3-methoxybenzalaniline I.5J.

However, the lubricating properties of the composition are not high enough.

The purpose of the invention is to improve the load and anti-wear properties of the composition.

This goal is achieved in that the base oil-based lubricating composition contains a dicarboxylic acid ester and contains an additive as a dicarboxylic acid ester; phthalic acid ester of general formula (, c.) 2, where, and as an additive it contains 2,4,5,7-thorodofluorescein Siodeosin of formula

f /

COONH

with the following ratio of components, wt.%:

Iodeosin 0.1-0.4

Phthalic acid ester 20-30 Base oil Else For preparing the composition, use is made of petroleum or synthetic oils of different chemical structure and physicochemical properties Industry 20, Industrial MEP, vacuum VM-4, polyethylsiloxane liquid 132-25, Oils mixed with complex phthalic acid esters and tetraiodofluorescein in the above

proportional to 100-1 and qi x when heated to vigorous stirring. After cooling, the oil is prepared by cooking. ,

Lubricating properties examined on the machine face friction. Movable samples with a diameter of 6 mm are made of bronze Br ОФ-6-0,25 stationary from steel st. 45. The volume of oil bath is 35-40 cm. The average 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 (load, above which steady friction or selective transfer mode is implemented) and the coefficient of loading are fixed. Wear is determined by a gravimetric method based on the difference in weight of the samples before and after the test. Weight wear rate is determined by the formulas

,

where g is the weight loss of the samples;

Sn is the contact area;

L is the way of training.

The data obtained in the study of compositions shown in the table. The test data for a lubricant composition based on base oils with the addition of 2-hydroxy-3-methoxybenzalaniline (o-vashshalaniline) containing weight is also given here for comparison. %: o-vanilalaniline 0,1, dioctyl adipate 30j vaseline oil - the rest of the composition 0-vanilalaniline 0.1 polyorganosiloxane liquid PES-2 the rest (composition 2).

Comparison of the test results of the proposed composition and known with o-vanilalanine indicates a significant improvement in load and anti-wear properties. The lubricating properties depend on the concentration of tetraiodofluorescein in the mixture of the small ester.

The concentration of ester below 20 vol.% Is not sufficient for normal dissolution of the additive, and a concentration above 30 wt.% Slightly improves the lubricating properties, but leads to a significant increase in the cost of the composition. B concentration above 0.4 wt.% Additive is insoluble in the composition.

The concentration corresponding to the maximum effectiveness of the additive is practically independent of the nature of the oil and lies in the range of O, i-0.4 wt.%.

The maximum load of the proposed composition is increased by 2025% compared to the composition with ogvanilalaniline. The weight wear rate is reduced by 30-50% for the bronze and by 50-90% for the steel sample.

Known composition Composition 1 Composition 2 620

0.91 ut 0.92 0.0091.31 0.0081.96

20

Dibutyl phthalate

Table continuation

12.54

12.87

Claims (2)

360 0.018 Thus, it follows from the data in the table that they are lubricating; the properties are different in nature; oils can be improved by adding esters of phthalic acid, and tetraiodofluorescein with joint presence. The proposed COMPOSITION can be used as gear oils and lubricating bases. ; The invention is a base oil lubricating composition containing a complex eight Continuation of the table Dicarboxylic ester and additive, characterized in that, in order to improve the load and anti-wear properties of the composition, as a dicarboxylic acid ester, it contains phthalic acid ester of the general formula SbH4 (COOC, H2i, where g) A-9, but. as an additive, it contains 2,4,5,7 tetraiodofluorescein with the following ratio of components, wt.%: 2,4,5,7-tetraiodofluorescein 0, 1-0,4 Phthalic ester 20-30 Base Oil The rest 9 .825593,10 Sources. Information, 3. USSR author's certificate taken into account in the examination number 618403, cl. C 10 M 1/32, 1976. 1Garkunov D.N. and others. Voter- 4. USSR author's certificate Ny deres in friction nodes. M., Tran-no. 652204, cl. C 10 M 1/32, 1977. Sport .1961, p. 103. 5 5. USSR author's certificate. 2. USSR author's certificate for the license (628599, cl. С 10 М 1/32,  606877, class With YuM 1/32, 1976.1978 (prototype).