RU2500705C1 - Method of making ski wax - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: perfluorocarbons are obtained by decarboxylation and dimerisation of C₆-C₉ perfluorinated acids, said perfluorocarbons being treated in 0.5-2 hours with ethanol or isopropanol solution containing 0.5-4.5 wt % fluorine-containing surfactants of general formula

, where R_F is optionally a radical C₆F₁₃-, C₈F₁₇-, or

, where n=1-2. The solvent is then distilled off, followed by drying and moulding.

EFFECT: use of the disclosed method provides a composition having a wide operating temperature range, which enables use of lubricants in unstable weather conditions.

1 ex, 1 tbl

Description

The invention relates to the field of sports, and in particular to a method for the manufacture of sliding lubricants for surface treatment of plastic skis that improve the sliding and speed characteristics of skis.

It is known that in recent years, from the entire range of lubricants intended for preparing the surface of plastic skis, compounds with various fluorine-containing components in the form of slip ointments, holding ointments (adhesives), accelerator powders, emulsions and tablet formulations are widely used throughout the world.

Due to their unique properties, fluorine-containing components provide the following main advantages:

- good ski glide in a wide temperature range, and they are especially effective at temperatures at plus temperatures around zero degrees;

- the best retention of ointment on the surface of the ski;

- low coefficient of friction;

- high water and dirt repellent properties.

It is known [Russia, the journal "Skiing", 4/1998, p. 53, registration number 017476 dated 04/22/1998] the use of high-fluorine and low-fluorine paraffins as a ski ointment, and the fluorinated paraffin in this case is the main component of the composition of the ointment.

However, this ointment has a relatively high coefficient of friction of the working surface of the ski in the snow.

Known ski ointment [RF 2203300, IPC ⁷ C09G 3/00, op. 04/27/2003], which contains paraffin and a fluorinated modifier, and the fluorinated modifier is adsorbed in a finely divided solid carrier, which is zinc oxide, titanium oxide or carbon graphite. A carrier with a fluorinated modifier is 3-12 wt.% Of the total weight of the ointment. As a fluorinated modifier, the ointment contains 0.3-2.5% wt. compositions based on oligomers of methacrylic esters of fluorine-containing telomeric alcohols of the general formula CH ₂ = C (CH ₃ ) COOCH ₂ (CF ₂ CF ₂ ) _n Y (A), where n = 1-6; Y = H or F, in combination with α, ω-chloro-perfluoroparaffins of the general formula: Cd- (CF ₂ CF ₂ ) _n -Cl (B), where n = 10-20 and polyesters of the general formula: CF ₃ O (CF ₂ CF ₂ O) _n CF ₂ COF (C), where n = 10-30, with the following content of components, wt.%: (A) - 50-90, (B) - 10, (C) - 0-40 .

Known [RF patent 2293098, IPC C09G 3/00, A63C 11/08 Publ .: 10.02.2007] the invention, which relates to a method for producing lubricants for surface treatment of plastic skis, to improve the sliding and speed characteristics of skis. The method consists in dissolving / suspending accelerator powders in fluorine-containing solvents. In this case, mixtures of perfluoro-, α-chloroperfluoro- and α, ω dichloroperfluoroalkanes are used as accelerator powders: [C₁₂F₂₆: C₁₂F₂₅Cl: C₁₂F₂₄Cl₂] or [C₁₂F₂₆: C_fourteenC_29thCl: C₁₆C₃₂Cl₂] or [C₁₆F₃₄: C_fourteenF_29thCl: C₁₂F₂₄Cl₂] or [C₁₆F₃₄: C₁₆F₃₃Cl: C₁₆F₃₂Cl₂] or [C₁₂F₂₄Cl₂: C_fourteenF₂₈Cl₂:: C₁₆F₃₂Cl₂]. The solvents used are perfluorodecalin, perfluoromethyldecalin, freon-350 or carbogal, or mixtures thereof in any proportions and combinations. The dissolution / suspension process is carried out using an ultrasonic dispersant with a ratio of powder-accelerator: solvent or a mixture of solvents equal to 1: 7-9 by weight.

A closer technical solution is the composition for surface treatment of plastic skis and the method for its preparation [RF patent 2426757, IPC C09G 3/00, C07C 19/08, op. 08/20/2011]. This is a composition called accelerator powder, including perfluoroalkanes of the group comprising C ₁₂ F ₂₆ ÷ C ₁₆ F ₃₄ , and in addition, additionally containing perfluoroalkanes from the group comprising C ₁₈ F ₃₈ ÷ C ₅₆ F ₁₁₄ , or a mixture thereof, in an amount 2-50 wt.%.

The challenge facing the authors of the present invention is the development of a method of manufacturing a ski ointment with a wide range of applications in temperature, which makes it possible to use it under unstable weather conditions, from +5 to -20 °.

This problem is solved by creating a new method for manufacturing the composition of the ointment, which is obtained by applying to the surface of the powdered perfluorocarbon a monomolecular layer of a fluorine-containing surfactant (fluorine-surfactant).

The essence of the invention lies in the fact that the proposed method of manufacturing a ski ointment based on perfluorocarbons, characterized in that the decarboxylation and dimerization of perforated acids C ₆ -C _{9 are} first carried out, the resulting perfluorocarbons are treated for 0.5-2 hours with a solution of ethanol or isopropanol, including 0.5-4.5 wt.% Fluorine-containing surfactants of the General formula

where R _F represents, optionally, a radical C ₆ F ₁₃ -, C ₈ F ₁₇ -, or

,

,

where n = 1 or 2,

after processing, the solvent is distilled off, dried to constant weight, and molding. At the same time, the necessary forms of ski ointments are prepared: powders, emulsions, or compressed tablets.

A solution of fluorine surfactant is prepared so that in the finished composition of the ointment the content of fluorine surfactant is 0.5-4.5 wt.% Relative to the mass of fluorocarbons.

To obtain perfluorocarbons, the electrochemical synthesis method (Kolbe method) is used, which is based on decarboxylation and dimerization of perfluorinated acids, for example, perfluoroenanthic acid (C ₆ F ₁₃ COOH), perfluoropelargonic (C ₈ F ₁₇ COOH), both in the form of individual substances and in the form of mixtures. By this method, in particular, perfluorocarbon samples from C ₁₂ F ₂₆ to C ₁₈ F ₃₈ were obtained.

The resulting compounds were subjected to additional purification by dissolving them in a solvent, followed by precipitation from solution.

The composition and structure of the obtained fluorine compounds were determined by analytical methods - elemental analysis, IR and NMR spectroscopy.

It was established that the developed ointment compositions, due to the introduction of fluorosurfactants, form a monomolecular nanostructured film on the sliding surface that is firmly held on the surface and provides a reduction in friction, an increase in water-repellent properties in a wide temperature range of the environment (from +5 to -20 °). with different ski conditions.

Examples of the manufacture of ointments

Example 1

By decarboxylation and dimerization of perfluorinated acid (perfluoroanthate C ₆ F ₁₃ COOH), a mixture is obtained mainly consisting of C ₁₂ F ₂₆ fluorocarbons. Fluorosurfactants of the general formula

Here, R _F is a radical:

Fluorinated surfactants at the rate of 0.5 wt.% Relative to the mass of fluorocarbon are dissolved in a solvent (isopropanol) and a powder mixture of these perfluorocarbons is treated for 2 hours. Then the solvent is distilled off, the mixture is dried to constant weight at a temperature of 50 ° C for 5 hours. The obtained processed composition of the ointment in the form of a powder is applied to the surface of the ski using a special technology. During the test, high sliding properties were noted in the temperature range from +5 to -20 ° C.

Example 2

By decarboxylation and dimerization of perfluoroenanthic acid and perfluoropelarboxylic acid (C ₈ F ₁₇ COOH), samples of a mixture of fluorocarbons C ₁₂ F ₂₆ and C ₁₈ F ₃₈ are obtained which are treated with fluorosurfactants in a solution of isopropanol.

Use fluorine surfactant formula

where R _F represents a radical C ₆ F ₁₃ - from the calculation of 4.5 wt.% relative to the mass of fluorocarbon. Fluorocarbon is dissolved in a solvent (ethanol) and a powder mixture of these perfluorocarbons is treated for 0.5 hours. Then the solvent is distilled off, the mixture is dried to constant weight at a temperature of 55 ° C for 4.5 hours. The resulting composition is dried to constant weight, and then the necessary types of ski ointments are prepared - powders, emulsions, or tablets. After applying to the surface of the ski using a special technology, as a result of the tests, high sliding properties were noted in the temperature range from +5 to -20 ° C.

Other embodiments of the invention are summarized in Table.

Testing of samples of obtained ski ointments was carried out in real competition conditions, on a winter ski track with different snow conditions - on fresh, fine-grained, wet, as well as on artificial snow. Air temperature ranged from + 5 ° C to -22 ° C. The expansion of the temperature range at which the ointment retains its operational properties is the main advantage of the developed composition.

The authors developed a method for the manufacture of ointment composition for a wide range - from +5 to -5 ° C (“mild conditions”) and from -8 to -20 ° C.

When comparing with the best samples of foreign ointments, the ointment compositions made by the proposed method during slip testing exceeded them by 8-12%. One of the testing options was to measure the “roll-out time” of skis using a standard method. At the same time, according to experts, the achieved reduction in the time of “skiing out” represents a significant advantage over other types of ointments.

Fluorocarbons Surfactant (see note),% Solvent, impregnation time Drying: T ° C, time Molding A mixture of C ₁₆ F ₃₄ and C ₁₈ F ₃₈ (1: 1) (1) - 0.5% 2 hours 50 ° C, 1 hour. tableting C ₁₂ F ₂₆ (2) - 4.5% 1,5 hour 55 ° C, 1.5 hours powder A mixture of C ₁₂ F ₂₆ and C ₁₈ F ₃₈ (about 1: 1) (3) - 4% 0.5 hours 1 hour tableting

Note:

,Where

,

Claims (1)

A method of manufacturing a ski ointment based on perfluorocarbons, characterized in that decarboxylation and dimerization of perfluorinated acids C ₆ -C ₉ receive perfluorocarbons, which are treated for 0.5-2 hours with a solution of ethanol or isopropanol containing 0.5-4.5 wt. % fluorine-containing surfactants of the general formula

where R _F represents, optionally, a radical C ₆ F ₁₃ -, C ₈ F ₁₇ -, or

where n = 1-2
then carry out the distillation of the solvent, drying and molding.