RU2303628C2 - Concentrate of lubricant-and-coolant for mechanical metalworking - Google Patents

Abstract

FIELD: metalworking plants.

SUBSTANCE: proposed concentrate contains the following components, mass-%: product of interaction of fatty acids with alkanol amine at temperature of 130-150C, 16-30; glycols, product of interaction of boric acid with alkanol amine at temperature of 95-100C, 20-40; di(alkyl polyethylene glycol) ester of phosphoric acid potash salt, 0.2-1; mineral oil, 1-4; benzoic acid, 02.2.0; polyethylene oxide, 15-30; the remainder being water.

EFFECT: reduced foaming; improved lubricating properties.

2 tbl

Description

The invention relates to cutting fluids (coolant) and can be used to prepare working coolant solutions used for metal cutting by metalworking enterprises.

Known concentrates for the preparation of coolants used in the machining of metals, which are aqueous solutions of active components, such as glycols, higher fatty acids, triethanolamine, a salt of cyclohexylamine and synthetic fatty acids of fraction C ₁₀ -C ₁₃ [1].

However, working solutions prepared from such components, when used at enterprises equipped with centralized coolant supply systems, where they are intensively mixed, cause abundant foaming above normal, which in turn complicates the machining process. Adding antifoam in working solutions does not give the desired effect, and it can also worsen the remaining properties of the coolant.

The composition of the same purpose closest to the claimed invention in terms of the set of essential features and the technical result achieved is a coolant concentrate for metal machining containing higher fatty acids, triethanolamine, glycols, synthetic fatty acids of the C ₁₀ -C ₁₆ fraction, the product of the interaction of boric acid with monoethanolamine at a temperature of 95-105 ° C [2].

The disadvantage of this coolant is that aqueous solutions prepared from this concentrate do not have satisfactory foaming performance, which are important components of the performance properties of the coolant during use in machining.

The task of the invention is the creation of a synthetic coolant concentrate with reduced foaming ability while maintaining and improving the remaining technological properties.

The specified technical result is achieved in that the concentrate of the cutting fluid for machining metals containing glycols, the product of the interaction of boric acid with alkanolamine at a temperature of 95-105 ° C, additionally contains the product of the interaction of higher fatty acids with alkanolamine at a temperature of 130-150 ° C , di (alkylpolyethylene glycol) ester of phosphoric acid, potassium salt, mineral oil, benzoic acid, polyethylene oxide and water in the following ratio of components, wt.%:

Higher Fatty Interaction Product acids with alkanolamine at a temperature of 130-150 ° C 16-30 Glycols 2-6 Boron Interaction Product acids with alkanolamine at a temperature of 95-105 ° C 20-40 Di (alkylpolyethylene glycol) phosphoric acid ester potassium salt 0.2-1 Mineral oil 1-4 Benzoic acid 0.2-2.0 Polyethylene oxide 15-30 Water rest

A study of the tendency to foaming and technological properties of the coolant, preparation based on the inventive concentrate showed that the introduction of the reaction of higher fatty acid with alkanolamine at a temperature of 130-150 ° C, di (alkylpolyethylene glycol) ester of phosphoric acid, potassium salt, oil, benzoic acid and polyethylene oxide in combination with other components leads to the stabilization of the foam and improve the technological properties of the coolant. In this case, the introduction of an antifoam is not required in this concentrate.

For the preparation of concentrates were used:

- for the preparation of the product of the interaction of higher fatty acids with alkanolamine at a temperature of 130-150 ° C, oleic acid - TU 9145-172-473197-94, or myristic acid - TU 6-09-127-70, or stearic acid were used as fatty acids - GOST 9419-60, monoethanolamine TU 6-02-915-84, or diethanolamine TU-09-2652-86, or triethanolamine TU 6-02-916-79 used as alkanolamines;

- as glycols: ethylene glycol - GOST 19710-83; or diethylene glycol - GOST 1016-77;

- the product of the interaction of boric acid GOST 18704-78 with alkanolamine (monoethanolamine, TU 6-09-215-84, or triethanolamine TU 6-02-916-79 were also used as alkanolamine) at a temperature of 95-105 ° C;

- di (alkylpolyethylene glycol) ester of phosphoric acid potassium salt - TU 6-02-1177-79 (oxyphos B);

- mineral oil I-12A - GOST 20799-88;

- benzoic acid - GOST 10521-63;

- polyethylene oxide-400 - FS 42-1242-96.

The concentrate is obtained by mixing the components at a temperature of 60-80 ° C with stirring until a homogeneous mass is obtained.

For work using 2% solutions prepared on water with a total hardness of 4.6 mEq / L.

The compositions of the claimed and known concentrates are shown in table 1.

The method for determining the tendency to foam and foam stability is as follows.

In a measuring cylinder with a capacity of 1000 ml is poured 190 ml of a working coolant solution.

A microcompressor is connected to the device to determine the tendency to foam.

Air is passed through the test solution at a constant speed of 94 ± 5 cm ³ / min for 5 minutes, the time is counted from the moment the first air bubbles appear. After the specified time, the air supply is stopped and the volume of foam in cm ^{3 is} measured.

After 10 minutes of sludge, the foam volume is measured again.

The test is repeated three times.

The final result is taken as the arithmetic average of three parallel definitions, the permissible differences between which should not exceed 20% of the average value.

The test result of the foaming ability of the known and proposed compositions of the coolant are shown in table 2.

A study of the technological properties of the proposed composition compared to the known one was carried out when turning an AL2 aluminum alloy on a 16K20 lathe with a P6AM5 high-speed steel tool at a cutting speed of 40 m / min, a feed of 0.05 mm / rev, and a cutting depth of 1 mm. The roughness of the treated surface was evaluated, which was determined on a Talysurf instrument.

The test results are shown in table 2.

As can be seen from the table, the foaming ability of the proposed composition is much lower than that of the known composition, and meets all the requirements for propensity for foaming and stability.

The technological properties of the proposed option are not only preserved, but also improved, which indicates that the claimed composition has higher lubricating properties.

Sources of information taken into account when drawing up the description and claims:

1. RF patent No. 2109036

2. RF patent №2115699

Table 1 Components Compositions, wt.% one 2 3 four 5 6 7 8 9 10 eleven 12 13 fourteen fifteen 16 17 eighteen 19 twenty 21 22 23 Oleic acid fifteen - - - - - - - - - - - - - - - - - - - Triethanolamine twenty - - - - - - - - - - - - - - - - - - - The product of the interaction of oleic acid with monoethanolamine at T 130-140 ° - 16 22 thirty 16 16 The product of the interaction of oleic acid with diethanolamine at T 130-140 ° - - - - - - 16 22 thirty 16 16 The product of the interaction of oleic acid with triethanolamine at T 130-140 ° - - - - - - - - - - 16 22 thirty 16 16 The product of the interaction of myristic acid with monoethanolamine at T 130-140 ° - - - - - - - - - - - - - - 16 22 thirty 16 16 The product of the interaction of myristic acid with diethanolamine at T 130-140 ° 16 22 The product of the interaction of myristic acid with triethiolamine at T 130-140 ° The product of the interaction of stearic acid with monoethanolamine at T 130-140 ° The product of the interaction of stearic acid with diethanolamine at T 130-140 ° The product of the interaction of stearic acid with triethanolamine at T 130-140 ° Ethylene glycol twenty 2 3 6 6 2 2 3 6 6 2 2 3 6 6 2 2 3 6 6 2 2 3 Diztylene glycol - - - - - - - - - - - - - - - - - - - - - 2 3 The product of the interaction of boric acid with monoethanolamine at a temperature of 95-105 ° C fifteen 40 26 thirty twenty twenty 40 26 thirty twenty twenty 40 26 thirty twenty twenty 40 26 thirty twenty twenty - - The product of the interaction of boric acid with triethanolamine at a temperature of 95-105 ° C twenty 26 Synthetic fatty acids fraction C ₁₀ -C ₁₆ 1,0 - - - - - - - - - - - - - - - - - - - Phosphoric acid di (alkylpolytisylene glycol) ester potassium salt - 0.2 0.5 one one 0.2 0.2 0.5 one one 0.2 0.2 0.5 one one 0.2 0.2 0.5 one one 0.2 0.2 0.5 Mineral oil - one 2 3 four one one 2 3 four one one 2 3 four one one 2 3 four one one 2 Benzoic acid - 0.2 0.7 one 2 0.2 0.2 0.7 one 2 0.2 0.2 0.7 one 2 0.2 0.2 0.7 one 2 0.2 0.2 0.7 Polyethylene oxide - fifteen twenty fifteen fifteen thirty fifteen twenty fifteen fifteen thirty fifteen twenty fifteen fifteen thirty fifteen twenty fifteen fifteen thirty fifteen twenty Water Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100

Continuation of table 1 Components Compositions, wt.% 24 25 26 27 28 29th thirty 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 Oleic acid - - - - - - - - - - - - - - - - - - - - - - - Triethanolamine - - - - - - - - - - - - - - - - - - - - - - - The product of the interaction of oleic acid with monoethanolamine at T 130-140 ° - The product of the interaction of oleic acid with diethanolamine at T 130-140 ° The product of the interaction of oleic acid with triethanolamine at T 130-140 ° The product of the interaction of myristic acid with monosanolamine at T 130-140 ° The product of the interaction of myristic acid with diethanolamine at T 130-140 ° thirty 16 16 - - - - - - - - - - - - - - The product of the interaction of myristic acid with triethanolamine at T 130-140 ° - - 16 22 thirty 16 16 - - - - - - - - - The product of the interaction of stearic acid with monoethanolamine at T 130-140 ° - - 16 22 thirty 16 16 - - - - The product of the interaction of stearic acid with diethanolamine at T 130-140 ° - - 16 22 thirty 16 16 - The product of the interaction of stearic acid with triethanolamine at T 130-140 ° 16 22 thirty 16 16 Ethylene glycol - - - - - - - - - - - - - - - - - - - - - - - Diethylene glycol 6 6 2 2 3 6 6 2 2 3 6 6 2 2 3 6 6 2 2 3 6 6 2 The product of the interaction of boric acid with monoethanolamine at a temperature of 95-105 ° C - - - - - - - - - - - - - - - - - 16 The product of the interaction of boric acid with triethanolamine at a temperature of 95-105 ° C thirty twenty twenty 40 26 thirty twenty twenty 40 26 thirty twenty twenty 40 26 thirty twenty twenty 40 26 thirty twenty twenty Synthetic fatty acids fraction C ₁₀ -C ₁₆ - - - - - - - - - - - - - - - - - - Phosphoric acid di (alkylpolyethylene glycol) ester potassium salt one one 0.2 0.2 0.5 one one 0.2 0.2 0.5 one one 0.2 0.2 0.5 one one 0.2 0.2 0.5 one one 0.2 Mineral oil 3 four one one 2 3 four one one 2 3 four one one 2 3 four one one 2 3 four one Benzoic acid one 2 0.2 0.2 0.7 one 2 0.2 0.2 0.7 one 2 0.2 0.2 0.7 one 2 0.2 0.2 0.7 one 2 0.2 Polyethylene oxide fifteen fifteen thirty fifteen twenty fifteen fifteen thirty fifteen twenty fifteen fifteen thirty fifteen twenty fifteen fifteen thirty fifteen twenty fifteen fifteen thirty Water up to 100 Up to 100 _o Up to 100 _o Up to 100 _o Up to 100 _o Up to 100 _o Up to 100 _o Up to 100 _o Up to 100 _o Up to 100 _o Up to 100 _o Up to 100 _o Up to 100 _o Up to 100 _o Up to 100 _o Up to 100 _o Up to 100 _o Up to 100 _o Up to 100 _o Up to 100 _o Up to 100 _o Up to 100 _o Up to 100 _o

table 2 No. of the composition of the concentrate in accordance with table 1 Surface roughness Ra, microns The tendency to foaming, cm ³ The stability of the foam, cm ³ No. 1 9 580 370 Number 2 four 40 0 Number 3 4,5 45 0 Number 4 5 fifty 0 Number 5 4.3 45 0 Number 6 4.6 fifty 0 Number 7 4.7 40 0 Number 8 4.3 fifty 0 Number 9 4.1 fifty 0 Number 10 four fifty 0 Number 11 4.4 40 0 Number 12 four 45 0 Number 13 4.3 45 0 Number 14 4.0 40 0 Number 15 5 35 0 Number 16 5.1 40 0 Number 17 4.9 35 0 Number 18 4.6 45 0 Number 19 4.3 fifty 0 Number 20 5 35 0 Number 21 4.7 40 0 Number 22 4.3 40 0 Number 23 4.6 45 0 Number 24 4.4 fifty 0 Number 25 4.3 55 0 Number 26 4.8 fifty 0 Number 27 4.9 45 0 Number 28 5 45 0 Number 29 4.1 40 0 Number 30 4,5 40 0 Number 31 4.7 fifty 0 Number 32 4.9 45 0 Number 33 4.2 35 0 Number 34 5.1 40 0 Number 35 5 40 0 Number 36 4.4 45 0 Number 37 40 fifty 0 No. 38 4.6 45 0 Number 39 4.3 fifty 0 Number 40 4.2 45 0 Number 41 4.4 40 0 Number 42 4,5 40 0 Number 43 4.2 45 0 Number 44 4.7 fifty 0 Number 45 4.3 40 0 №46 four 45 0

Claims (1)

Concentrate of cutting fluid for machining metals containing glycols, the product of the interaction of boric acid with alkanolamine at a temperature of 95-105 ° C, characterized in that it further contains the product of the interaction of higher fatty acids with alkanolamine at a temperature of 130-150 ° C, di ( alkylpolyethylene glycol ester of phosphoric acid potassium salt, mineral oil, benzoic acid, polyethylene oxide and water in the following ratio, wt.%: product of higher interaction fatty acids with alkanolamine at a temperature of 130-150 ° C 16-30 glycols 2-6 boron interaction product acids with alkanolamine at temperature 95-105 ° С 20-40 di (alkylpolyethylene glycol) phosphoric acid ester potassium salt 0.2-1 mineral oil 1-4 benzoic acid 0.2-2.0 polyethylene oxide 15-30 water rest