SU739083A1 - Lubricating composition - Google Patents

Description

(54) LUBRICATING COMPOSITION

one

The invention relates to compositions of lubricating compositions intended for high-speed gears, pa6oTaf6inHx in the zone, high temperatures.

Known pentaerythritol ester-based lubricant composition containing antioxidants: dioctyl or dinonyl diphenylamine, monooctylphenyl-naphthylamine, a metal passivator, which can be used as azols, an additive that enhances lubricity — neutral phosphate, eg three tl olyflylphosphate, naphthylamine, 3 tons of olymphylamine, an additive that enhances lubricity — neutral phosphate, eg three tl olyphylphylfluoride — three tl olyphylphylene, and an additive that improves lubricity — neutral phosphate;

A pentaerythritol-based lubricating composition with improved anticorrosive, antioxidant and lubricating properties is known by introducing a mixture of additives of neutral organic phosphate, usually tricresyl phosphate, in a concentration of 0.01-3 wt.%, Alkylamine salt and monohaloalkylphosphonic acid 0.01-2 wt.% , dicarboxylic acid, predominantly azelaic acid, 0.005-0.1 wt.%. In addition to these additives, the composition includes the usual additives of amine-type antioxidants, anticorrosive additive-benzotriazole and antifoam silicone bone 2.

A known lubricant composition based on pentaerythritol ester and monobasic fatty acids, containing - antioxidants p, p-dioctyldiphenylamine, phenyl-in-naphthylamine, an additive that improves lubricity,

10 tricresyl phosphate, metal passivator-benzotriazole 3.

A disadvantage of the known composition is its low lubricity at a temperature higher.

15

The aim of the invention is to increase the level of the lubricating ability of the composition, which would allow the use of such a composition in

20 conditions of temperatures above 200 ° C and high loads and speeds.

The goal is achieved by the fact that a lubricant composition based on pentaerythritol ester and monobasic fatty acids, containing p, p-dioctyldiphenylamine, phenyl-L-naphthylamine, tricresyl phosphate and benzotriazole, also contains poly & dicarboxylic acid and non-glycol in the ratio of components, brackish, and benzotriazole; :

p, p-dioctyldiphenylamine 1.0-4.0 Phenyl-L-naphthylamine 0.5-1.2

Tricresyl phosphate 2.0-4.0

Benzotriazole 0,01-0,08

Polyether dicarboxylic acid Cg-C, Q and neoglycol 1-10

Ether of pentaerythritol and monobasic fatty acids to 100

as a polyester, the composition may contain polycarbonate of dicarboxylic acid CQ-CIQ and neopentyl glycol or trimethylolpropane, mono-substituted with monobasic caoic acid

The introduction of the polyester makes it possible to increase the anti-shead and anti-wear properties of the lubricant composition at a temperature. 1800 1560) 184 Neopentine Adipino glycol va NeopeytilSebacino2900 I960 740 va

Monvaleriat Sebatsinotrimetilolnova

A) Viscosity determined at 50 ° C

Lubricating composition is prepared by adding polyether to a mixture of pentaerythritol ester and synthetic fatty acids. Cg-C fraction containing antioxidants, corrosion inhibitor and ricresyl phosphate, and heating, p-Dioctyldiphenylamine J 5

Phenyl-sz-naphthylamine If O

Benzotriazole 0.03

The polyesters introduced into the composition can be obtained by polycondensation in the melt without a catalyst of dicarboxylic acids and non-glycols, taken in a stoichiometric ratio or with a slight excess of neoglycol. Stopping the growth of the polyether macromolecule chain is achieved by varying the duration of the polycondensation or the introduction of a small amount of butanol. In the case of using monosubstituted trimethylolpropane i (TMP), the monomer is synthesized by esterifying TMP with monocarboxylic acids from C to C, g, followed by separation of the target component by chemical methods.

In this way were prepared polyesters, the characteristics of which are presented in table 1.

Table 1

nor with stirring until a clear, homogeneous solution is obtained. .

Prepared 5 samples of the composition, the composition of which is given in tabd, 2. about

.Table 2

2.53.7 1.5 2.5

0,80,51,0 0,8

0.050.07 0.03 0.05 143.3 5.6 1.4675 205 6.0 1.4700

Tricresyl phosphate

Polyester monovaleric trimethylolpropane and sebacic acid

Polyester adipic acid and neopentyl glycol

Polyether of sebacic acid and neo pentylglycol

Polyester monostearate three methylolpropane and sebacic acid

Ether of pentaerythritol and monobasic fatty acids

Prepared samples of lubricating compositions tested for extreme pressure and antiwear properties on the RP device according to the interdepartmental method 319-15-77.

The method is designed to evaluate the anti-seize and anti-wear properties of oils in a gearing model at elevated temperatures (up to 300 ° C). Working unit of the device

consists of two rollers contacting along a generatrix where linear contact is made during sliding friction. As rollers, outer rings from a tapered roller bearing are used. Positive testing of extreme pressure

Known Same Composition 1 2

Continued table. 2

3,04,02,0 3,0

10.0

5.0

5.0

1.0

i, 65 90, 73 85, 47 88.65

jBoflcTB (with a + sign) mark samples that, under conditions of constant temperature, loads of 6,750 kg / cm, slip speeds of 0.5 m / s during the test time of 30 minutes do not cause a scuff. Anti-anoscience properties are assessed with positive testing of the anti-seize properties by the width of the wear trace on the fixed ring, measured under the microscope in mm.

The test results of the extreme and antiwear properties of a known composition and a composition with the addition of polyesters on an RPM device are presented in Table 3.

T a

faces

1.76

200

+ 225

bully

1.48

225 + + I 1 1.65

Claims (3)

Indicator of anti-seize properties, 11 indicator of antiwear properties. As can be seen from the presented data, due to the joint presence of additives of the known composition and polyether, there is an improvement in both the extreme pressure and anti-wear properties of the lubricant compositions at 225 ° C. Thus, the addition of polyesters in a concentration of 1.0–10 wt.% To a known composition provides an improvement in the extreme pressure properties of the oil and also a reduction in wear to 20%, which allows the upper temperature limit of the oil to be increased to. An increase in the upper temperature limit of the oil's working capacity will make it possible to increase the thermal stress of modern turbo-jet engines. Invention Lubricant composition based on pentaerythritol ester and monobasic fatty acids, containing p, p -dioctyldiphenylamine, phenyl-cd-naphthylams, tricresyl phosphate and benzotriazole, which, in order to increase the lubricant The continuation of the table.3 of the composition, it additionally contains polycarbonate of dicarboxylic acid Cf, -CjQ and neoglycol with a ratio of components, wt.%: P, p-Dioctyldiphenylamine 1-4 Phenyl-L-naphthylamine 0.5-1.2 Tricresyl phosphate 2-4 Benzotriazole 0,01-0,08 Polycarboxylic acid and neoglycol. 1-10 Ester of pentaerythritol and monobasic fatty acids up to 100 2. Composition according to claim 1, in accordance with the fact that polyether contains dicarboxylic acid polyester nvopentylglycol or trimethylolpropane monosubstituted with monobasic carboxylic acid; Sources of information taken into account in the examination 1. US Patent No. 2790478, cl. 252-34, pub. 19.74. 2. US patent number 3634239, cl. 252-32.5, publ. 1972. 3. For France No. 2058219, S YUM 3/00, published 1974 (prototype) ..