RU2041249C1 - Epilamating composition - Google Patents

Abstract

FIELD: special compositions. SUBSTANCE: composition has the compound of the general formula CF₃-CF₂-O[CF₂-CF(CF₃)O]_n-CF₂CF₂SO₃A where A K, Na, Li; R₄N C₁-C₅-alkyl; n 1-2 0.5-15.0% and acetone up to 100% EFFECT: enhanced quality of composition. 4 tbl

Description

 The invention relates to instrumentation, in particular to an epilating composition designed to prevent the spreading of easily spreading lubricants used in friction units.

 Known epilam Efren-1 (1), containing as solvent a mixture of freons 112 and 113 and perfluoropolyether acid 6MFR, having the following composition, wt.

Perfluoropolyether acid 6MFR 3.0-7.0 Freon 112 14.0-24.0 Freon 113 71.0-81.0
The disadvantage of this epilame is the inability to prevent spreading at high temperatures.

 The closest in composition to the claimed is a known epilame containing perfluoroenanthic acid and Freon 113 (2), in the following ratio of components, wt.

Perfluoroanthic acid 0.005-0.1
Freon 113 99,995-99,900
This epilame also prevents spreading only at low temperatures.

)_nCF₂CF₂SO₃A где А К, Na, Li, R₄N (R алкил С₁-С₅); n 1-2 и в качестве растворителя содержит ацетон при следующем соотношении компонентов, мас.The aim of the invention is to prevent the spreading of lubricants at elevated temperatures. This goal is achieved in that the epilating composition containing an epilating agent and a solvent, according to the invention, as an epilating agent contains a compound of the General formula
CF ₃ CF ₂ O (CF

) _n CF ₂ CF ₂ SO ₃ A where A K, Na, Li, R ₄ N (R alkyl C ₁ -C ₅ ); n 1-2 and as a solvent contains acetone in the following ratio of components, wt.

Epilating agent of the indicated formula 0.5-15.0 Acetone 85.0-99.5
The main characteristics of the components that make up the inventive epilating composition.

Acetone (GOST 2603-79)
specific gravity at 20 ° ^C 0,7890-0,7930
Perfluorulfo Salt
acids (3)
temperature decomposition Niya, above 300 ° ^C
The perfluorosulfonic acid salt is prepared as follows.

 To a mixture of 13.7 ml of a 10% aqueous solution of KOH (0.022 mol), 3 ml cf. 4.8 g (0.01 mol) of perfluoro-4-methyl-3,6-dioxaoctanesulfofluoride are gradually added, at the end of the exothermic reaction the mixture is stirred for another 0.5 h, the excess alkali is neutralized with HCl, the reaction mass is dried, the residue is dissolved in 120 ml boiling ethanol, filtered, evaporated and a residue of 5.2 g of K-salt of perfluoro-4-methyl-3,6-dioxo-octanesulfonic acid is obtained. Other salts are similarly prepared (for example, by replacing KOH with NaOH).

The product is a white or light gray powder (all salts are the same in appearance). The content of the main components of salts: C 15.37% F 52.98% S 5.48%
The epilating composition is prepared by mixing the components until completely dissolved at room temperature. Were prepared samples presented in table. 1.

 The composition of the epilame taken as a prototype, wt.

Perfluoroanthic acid 0.05
Freon 113 99.95
To confirm the claimed ratio of the components are examples 1-3. Epilam in example 4 contains perfluorosulfonic acid salts in an amount below the claimed. The proposed salts are not soluble in acetone in an amount of more than 15%
Spreadability on a metal surface was evaluated by the "wetting angle" for easily flowing liquids: MVP oil (hydrocarbon) and PMS-50 (organosilicon).

 The contact angle was determined on a MIR-2 instrument, which is an MPR-2 microscope equipped with an AM-9-4 eyepiece micrometer and a scale that allows one to determine the contact angle. The determination is carried out in transmitted light on a metal plate (Art. 45). The wetting angle is the angle formed between the line formed by the surface of the steel plate and the tangent drawn at the point of contact of the three phases (air, steel, oil). The device is equipped with electric heating, which allows determination at high temperatures. Heating was carried out for 2.8-3.0 hours

 The test results of the proposed epilam in comparison with the known epilam in a wide temperature range are presented in table. 2, 3 and 4.

 In examples 1-4, the perfluorosulfonic acid salt with the values of A K and n 2 is used as the epilating agent. The following examples are given to confirm the remaining values of "A" and "n" (tables 2 and 3).

 From the above data it is seen that the epilates of the claimed composition at high temperatures significantly exceeds the effectiveness of known epilating compositions. A positive effect is achieved through the use of perfluorosulfonic acid salts as an epilating agent.

 The use of these compounds as epilating agents will prevent the spreading of lubricants at high temperatures. This will increase the life of the friction units at high temperatures by maintaining a larger reserve of lubricant.

Claims (1)

EPILAMENT COMPOSITION containing an epilating agent based on a derivative of fluorinated acid and an organic solvent, characterized in that, in order to prevent the spreading of lubricants at elevated temperatures, the composition as an epilating agent contains a compound of the general formula

where AK, Na, Li, R ₄ N, where RC ₁ C _{5 is} alkyl;
n-1 2,
and as an organic solvent contains acetone in the following ratio of components, wt. Epilating agent of the specified formula 0.5 15.0
Acetone Up to 100

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