Azeotropic or azeotrope-like compositions for solvent and single-phase or two-phase cleaning applications

Abstract

The invention discloses a series of azeotropic or azeotrope-like compositions for solvent and single-phase or two-phase cleaning applications, and the formula of the azeotropic or azeotrope-like compositions mainly comprises trans-1, 2-dichloroethylene and hexafluoropropylene dimer; the composition may include at most one of 1, 1, 2, 2-tetrafluoroethyl-2, 2, 2-trifluoroethyl ether or 1, 1, 2, 3, 3, 3-hexafluoropropyl-2, 2, 2-trifluoroethyl ether, for example, 60 to 80% by mass of trans-1, 2-dichloroethylene, 20 to 40% by mass of hexafluoropropylene dimer or 60 to 65% by mass of trans-1, 2-dichloroethylene, or may also include any at most one of 1, 1, 2, 2-tetrafluoroethyl-2, 2, 2-trifluoroethyl ether or 1, 1, 2, 3, 3, 3-hexafluoropropyl-2, 2, 2-trifluoroethyl ether, for example, 60 to 80% by mass of trans-1, 2-dichloroethylene, 20 to 40% by mass of hexafluoropropylene dimer or 60 to 65% by mass of 1, 1, 2, 2- 25 to 30% by mass of a hexafluoropropylene dimer; and 10 to 15% by mass of any one of HFE347 or HFE449. According to the present invention, the component capable of generating the azeotrope-like composition with the trans-1, 2-dichloroethylene component can inhibit the flash point of the trans-1, 2-dichloroethylene component so as to improve the safety performance of transportation, storage and use. The multi-component composition described by the formula can be used for high-efficiency degreasing of metal parts or high-efficiency cleaning of precise devices in the metal processing process, can also be used as a solvent, a degreasing agent, a desoldering agent or a drying agent and the like, and can meet multiple application requirements.

Description

Technical Field

[0001] The present invention relates to a three-component azeotropic or azeotropic-like composition comprising trans-dichloroethylene, fluorinated olefins and hydrofluoroether. The azeotropic or azeotropic-like composition of the present invention can be used as a cleaning agent for efficient degreasing of metal parts in metal processing or efficient cleaning of precision devices. Background Art

[0002] With the continuous acceleration of the industrialization process, the equipment has higher and higher requirements for the cleanliness of surface parts. In order to improve the working efficiency and service life of equipment and devices, the yield of products and the cleanliness of the working environment, it is necessary to regularly carry out precision cleaning of the surface of equipment and its devices. However, the halogenated solvents such as nPB, chloroform, trichloroethylene, tetrachloroethylene, and Freon are mostly used for cleaning semiconductors, electronic parts, precision equipment, and optical parts. Although these cleaning agents have the advantages of strong cleaning ability, fast evaporation speed, and non-flammability, they also have the problems of strong toxicity, ozone layer destruction, high GWP value, and other hazards to human health and environmental pollution. They are subject to increasingly strict control at home and abroad. At the same time, as one of the main consumer groups of hydrochlorofluorocarbon compounds, China's monochloroethylene (HCFC-141b) and a small amount of dichloropentafluoropropane (HCFC-225) are widely used in the cleaning of electronic parts and metal parts, and the consumption of these two industries is huge, accounting for about 40% of the total consumption of the cleaning industry. However, due to their ozone depletion potential, HCFC-141b and HCFC-225 are restricted worldwide. According to policy analysis, developed countries have banned their use in 2010, and developing countries are also gradually banning the use of HCFC-141b. my country is also expected to stop production in 2025.

[0003] At present, the mainstream alternative to HCFC141b worldwide is trans-1,2-dichloroethylene, which has less environmental impact, low toxicity, and excellent oil solvent performance, as the main component of the cleaning agent, and is widely used in efficient cleaning solutions. However, trans-1,2-dichloroethylene has a low flash point, resulting in poor safety performance and difficulty in using it as a separate cleaning solvent. Therefore, it is necessary to add some compounds that can suppress its flash point, such as hydrofluoroether (HFE), hydrofluoroolefin (HFO), hydrofluorocarbon (HFC), fluorinated olefins, etc., to improve its safety performance and meet the needs of industrial applications. At present, similar products have been commercialized, such as the Novec series of cleaning agents in the United States, which are compositions of trans-1,2-dichloroethylene and hydrofluoroether, the Opteon series of cleaning agents in the United States, which are compositions of trans-1,2-dichloroethylene and hydrofluoroolefin, and the Enasolv series of Solvay in Belgium, which are compositions of trans-1,2-dichloroethylene and hydrofluorocarbon, etc. However, the industrial technology of hydrofluoroether and perfluoropolyether has long been monopolized by foreign companies such as 3M and Solvay, resulting in relatively high prices. Hydrofluorocarbons have a large global warming potential, and their application is restricted in many developed countries. As environmentally friendly non-ODS chemicals, fluorinated olefins have environmentally friendly properties such as zero ozone depletion potential, low global warming potential and short atmospheric life, and have considerable application prospects.

[0004] U.S. Patent US2023 / 0399591 A1 discloses a non-flammable and low global warming potential azeotropic cleaning liquid containing components such as trans-1,2-dichloroethylene, 1-chloro-2,3,3-trifluoropropene and 1,1,2,2,3,3,4-heptafluorocyclopentane, and a spray pattern is designed by propelling gas so that it can contact with liquid or vapor solvent compositions and can be well adapted in conventional vapor degreasing equipment. In this patented formula, 1-chloro-2,3,3-trifluoropropene is used as a flash point depressant, which can effectively increase the flash point of trans-1,2-dichloroethylene, but it has a pungent odor and is limited in use in a closed environment.

[0005] Chinese patent CN 118056001 A discloses a ternary azeotrope or azeotrope-like composition containing 65-85% by mass of trans-1,2-dichloroethylene, 5-20% by mass of any one of HFE7100, HFE7200, and HFE7300, and 1-15% by mass of 1,1,2,2,3,3,4-heptafluorocyclopentane, and provides a composition scheme for use in cleaning, solder removal, deposition, and carrier applications. However, since the technologies of hydrofluoroether products such as HFE7100, HFE7200, and HFE7300 are monopolized by established foreign companies, the cost of such cleaning agents continues to increase, limiting their market-scale applications.

[0006] As far as the domestic cleaning market is concerned, foreign companies have more mature technology and higher reputation, which are favored by the domestic market, resulting in a large share of the domestic cleaning market. However, the domestic development is relatively late, and the cleaning industry is full of vitality. At the same time, the cleaning industry technology has long been monopolized by foreign countries, and China urgently needs to develop its own patented technology.

[0007] Based on the above reasons, this application is filed. Summary of the invention

[0008] Based on the above reasons, in view of the problems or defects in the prior art, the purpose of the present invention is to provide an azeotropic or azeotropic-like composition for solvent and single-phase or two-phase cleaning applications, to solve or at least partially solve the above technical defects in the prior art: the present invention discloses an azeotropic or azeotropic-like composition comprising trans-1,2-dichloroethylene and fluorinated olefins, and the above composition may also contain a third component, hydrofluoroether; wherein trans-1,2-dichloroethylene is the main solvent, fluorinated olefins are flash point depressants and flame retardants, and hydrofluoroether has a volume expansion effect. The azeotropic or azeotropic-like composition of the present invention can be used for cleaning, desoldering and degreasing processes of semiconductor chips and circuit boards.

[0009] In order to achieve the above-mentioned purpose of the present invention, the technical solution adopted by the present invention is as follows:

[0010] A multi-component azeotropic or azeotrope-like composition, comprising:

[0011] The main agent, trans-1,2-dichloroethylene (t-DCE); and

[0012] The second component is a fluorine-containing olefin.

[0013] Specifically, in the above technical solution, the trans-1,2-dichloroethylene acts as a main solvent to dissolve other components that can improve its safety properties.

[0014] Furthermore, in the above technical solution, in a preferred embodiment of the present invention, the fluorine-containing olefin is hexafluoropropylene dimer.

[0015] Specifically, in the above technical solution, the fluorine-containing olefin is mainly used as a flash point depressant and flame retardant for trans-1,2-dichloroethylene.

[0016] Furthermore, in the above technical solution, the multi-component azeotropic or azeotrope-like composition further comprises a third component, and the third component is a stabilizer and / or a solubilizer having a boiling point close to that of the composition.

[0017] Furthermore, in the above technical solution, the stabilizer is an ether stabilizer.

[0018] Furthermore, in the above technical solution, the third component is hydrofluoroether.

[0019] Preferably, in the above technical solution, the composition is composed of trans-1,2-dichloroethylene, hexafluoropropylene dimer, and at most one hydrofluoroether.

[0020] More preferably, in the above technical solution, the hydrofluoroether is any one of 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether (HFE347) or 1,1,2,3,3,3-hexafluoropropyl-2,2,2-trifluoroethyl ether (HFE449).

[0021] Specifically, in the above technical solution, the HFE347 and HFE449 are both used to improve the compatibility of trans-1,2-dichloroethylene with fluorine-containing olefins, while increasing the broad-spectrum solubility and stability of the composition.

[0022] Furthermore, in the above technical solution, in the multi-component azeotropic or azeotrope-like composition, the content of trans-1,2-dichloroethylene is 60% to 80% by mass.

[0023] Preferably, in the above technical solution, in the multi-component azeotropic or azeotrope-like composition, the content of trans-1,2-dichloroethylene is 60% by mass to 70% by mass.

[0024] More preferably, in the above technical solution, in the multi-component azeotropic or azeotrope-like composition, the content of trans-1,2-dichloroethylene is 60% by mass to 65% by mass.

[0025] Further, in the above technical solution, the multi-component azeotropic or azeotrope-like composition comprises:

[0026] 60 to 80% by mass of trans-1,2-dichloroethylene;

[0027] 20 to 40% by mass of hexafluoropropylene dimer.

[0028] Further, in the above technical solution, the multi-component azeotropic or azeotrope-like composition comprises:

[0029] 60 to 70% by mass of trans-1,2-dichloroethylene;

[0030] 20 to 30 mass % of hexafluoropropylene dimer;

[0031] 5 to 15 mass % HFE347.

[0032] Further, in the above technical solution, the multi-component azeotropic or azeotrope-like composition comprises:

[0033] 60 to 65% by mass of trans-1,2-dichloroethylene;

[0034] 25 to 30 mass % of hexafluoropropylene dimer;

[0035] 10 to 15 mass % HFE449.

[0036] A second object of the present invention is to provide a method for cleaning stains on a substrate surface, the method comprising contacting and mixing the substrate surface to which the stains are attached with a sufficient amount of the multi-component azeotropic or azeotrope-like composition.

[0037] The third object of the present invention is to provide the use of the above-mentioned multi-component azeotropic or azeotrope-like composition in the degreasing of metal parts or the cleaning of precision devices during metal processing.

[0038] The present invention discloses a series of azeotropic or azeotropic compositions for solvent and single-phase or two-phase cleaning applications, the main components of which include trans-1,2-dichloroethylene and hexafluoropropylene dimer; or may also include any one of HFE347 or HFE449, for example, 60 to 80% by mass of trans-1,2-dichloroethylene, 20 to 40% by mass of hexafluoropropylene dimer or 60 to 65% by mass of trans-1,2-dichloroethylene, 25 to 30% by mass of hexafluoropropylene dimer and 10 to 15% by mass of any one of HFE347 or HFE449. The present invention suppresses the flash point of the trans-1,2-dichloroethylene component by producing a component of an azeotropic composition, thereby improving the safety performance of transportation, storage and use. The multi-component composition described in the formula of the present invention can be used for efficient degreasing of metal parts in metal processing or efficient cleaning of precision devices, and can also be used as a solvent, degreasing agent, defluxing agent or desiccant, etc., which can meet the needs of multiple applications.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] (1) The present invention provides a multi-component azeotropic or azeotrope-like composition comprising trans-1,2-dichloroethylene, a fluorinated olefin and other component compounds, wherein the composition has flame retardant properties.

[0041] (2) The present invention focuses on using trans-1,2-dichloroethylene as a main solvent, a fluorinated olefin flash point suppressant and a flame retardant, and at most one hydrofluoroether compound as a solubilizer and a stabilizer to form an azeotropic or azeotropic-like composition, wherein the composition does not show a flash point when tested according to ASTM D56-05 (2010), has good fat solubility, and can achieve excellent cleaning effect.

[0042] (3) The multi-component azeotropic or azeotrope-like composition of the present invention maintains stability of each component under single-phase or two-phase application conditions, satisfying the diverse application markets of solvent and cleaning applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 A graph showing the relationship between the dimer content of trans-dichloroethylene and the boiling point of the composition. DETAILED DESCRIPTION

[0045] Based on the application of environmentally friendly, low-toxic and low-odor solvents in replacing ODS chemicals such as HCFC-141b and HCFC-225, the present invention relates to a flash point suppression solution that fills the mainstream alternative solution, and provides a low-flammability cleaning solvent composition solution with azeotropic or azeotrope-like properties in single-phase or two-phase degreasing operations. In addition, azeotropic and azeotrope-like compositions are currently expected by mainstream cleaning applications such as precision cleaning of parts. The components of such compositions do not separate from each other during long-term storage and application, and the fractions remain basically unchanged in two-phase applications. This characteristic is a sufficient condition for maintaining high-efficiency cleaning capabilities for a long time in actual single-phase and two-phase applications, and is also the basis for ensuring that the composition can be recycled and reused multiple times. At the same time, for the removal of high-viscosity and difficult-to-handle lipid stains such as flux residues and lubricating grease, high stability and high solubility are also expected. The azeotropic or azeotrope-like compositions described in the present invention have excellent solubility and stable physical and chemical stability, which are specifically manifested as high Kb values ​​and chemical inertness.

[0046] Specifically, the present invention provides a series of compositions with azeotropic or azeotropic properties, with trans-1,2-dichloroethylene as the main component, supplemented by other flash point inhibitors and stabilizers, and is applied to solution and single-phase or two-phase cleaning. The azeotropic or azeotropic composition of the present invention includes a mixture of trans-1,2-dichloroethylene, fluorinated olefins, and at most one hydrofluoroether.

[0047] The present invention has other considerations on the hydrofluoroether additive. Preferably, the hydrofluoroether can be miscible with the other two components and form an azeotrope or azeotrope-like composition, specifically including HFE347 and HFE 449. At the same time, in order to avoid the differences in compatibility between multiple components and other multivariate factors that lead to component inhomogeneity, and to prevent the crossover of components that play the same role and increase the application cost, the hydrofluoroether of the present invention is added at most one, wherein the hydrofluoroether additive will not have a significant adverse effect on the azeotrope or azeotrope-like composition and the non-flammable properties of the composition of the present invention.

[0048] When the hydrofluoroether additive of the present invention is present and forms an azeotropic or quasi-azeotropic composition with the other two components, its selection is beneficial to improving the stability and solubility of the composition, and together with the two main components, constructs an efficient composition scheme for solvent and single-phase or two-phase cleaning.

[0049] Azeotropic or azeotrope-like composition formulation

[0050] The multi-component azeotropic or azeotrope-like composition of the present invention comprises:

[0051] Component 1: cleaning agent, trans-1,2-dichloroethylene;

[0052] Component 2: Fluorinated olefin, hexafluoropropylene dimer.

[0053] The composition may further include component 3: hydrofluoroether, component additive.

[0054] Preferably, 60 to 80% by mass of trans-1,2-dichloroethylene and 20 to 40% by mass of hexafluoropropylene dimer are used as a formula to synthesize an azeotropic or azeotropic-like composition 1. In this component formula, the azeotropic state of pure trans-1,2-dichloroethylene and hexafluoropropylene dimer is mainly explored, and its physical and chemical properties including density, boiling point, viscosity, surface tension, Kb value, flash point and flammability are studied to expand its application prospects in solvent and cleaning applications.

[0055] Preferably, 60% to 70% by mass of trans-1,2-dichloroethylene, 20% to 30% by mass of hexafluoropropylene dimer and 5% to 15% by mass of HFE347 are used as a formula to synthesize an azeotropic or azeotropic-like composition 2. In this component formula, HFE347, which has a wide range of sources, is preferably used as a component additive to explore the construction of a broader spectrum and more stable azeotropic or azeotropic composition formula for solvents and cleaning applications without affecting the azeotropic properties of trans-1,2-dichloroethylene and hexafluoropropylene dimer.

[0056] Preferably, 60% to 65% by mass of trans-1,2-dichloroethylene, 25% to 30% by mass of hexafluoropropylene dimer and 10% to 15% by mass of HFE449 are used as a formula to synthesize an azeotropic or azeotropic-like composition 3. In this component formula, compared with composition 2, HFE449 with stable physicochemical properties is preferably used as a component additive to replace HFE347, and to explore the construction of an azeotropic or azeotropic-like composition formula for solvents and cleaning applications with a broad spectrum and better stability without affecting the azeotropic properties of trans-1,2-dichloroethylene and hexafluoropropylene dimer in another hydrofluoroether.

[0057] The azeotropic or azeotropic-like composition of the present invention can be used for efficient degreasing of metal parts in metal processing or efficient cleaning of precision devices. The cleaning process can be single-phase cleaning or two-phase cleaning, and can also be used as a solvent, degreasing agent, and defluxing agent.

[0058] The physical and chemical properties of the multi-component composition formula involved in the present invention, including boiling point, flash point, density, viscosity, and surface tension, are obtained through professional testing in accordance with national standards.

[0059] The hexafluoropropylene dimer (CAS: 2070-70-4) used in the following embodiments of the present invention is also known as perfluoro-4-methyl-2-pentene.

[0060] The cleaning composition provided by the present invention is a non-toxic and harmless chemical, and the cleaning agent can meet the application requirements of industrial oil removal.

[0061] Example 1

[0062] Quasi-azeotropic properties of t-DCE and hexafluoropropylene dimer two-component compositions

[0063] Specific implementation plan:

[0064] i) 25 ml of trans-1,2-dichloroethylene was placed in a round bottom flask connected to a heating device, a condensing device and a thermometer.

[0065] ii) Add hexafluoropropylene dimer dropwise, observe and record the temperature of the composition.

[0066] Figure 1 This is the effect of different mass fractions of hexafluoropropylene dimer in the composition of trans-1,2-dichloroethylene and hexafluoropropylene dimer on the boiling points of the two components.

[0067] As shown in Table 1, in the two-component composition of trans-1,2-dichloroethylene and hexafluoropropylene dimer, when the dimer mass fraction is greater than 20%, a quasi-azeotropic state exists, and the boiling point is 34.0±0.1°C.

[0068] Example 2

[0069] Physicochemical properties of azeotropic compositions of t-DCE, hexafluoropropylene dimer and HFE347

[0070] Its characteristics are mainly physical and chemical properties, including density, boiling point, viscosity, surface tension, Kb value, flash point and flammability.

[0071] According to ASTM D56-05 (2010), the flash point standard test method of Tag closed cup tester was used to measure; the azeotropic mixture was measured using a density-viscosity tester; the boiling point of the azeotropic mixture was measured using an ebulliometer; according to GB / T 22237 Determination of Surface Tension of Surfactants, the azeotropic mixture was measured using a surface tension meter; according to GB / T11134-1989 Hydrocarbon Solvent Kauri Resin Butanol Value Determination Method, the KB value of the azeotropic mixture was measured. The results are listed in the following Table 1 in the form of a table.

[0072] Table 1

[0073]

[0074] As shown in Table 1, the azeotropic composition including 60-65 mass% t-DCE, 25-30 mass% hexafluoropropylene dimer and 10-15 mass% HFE347 is non-flammable. The azeotropic composition of its formula has low viscosity and surface tension, which is conducive to its flow on the contact surface, and the high KB value ensures its good grease solubility.

[0075] Example 3

[0076] Physicochemical properties of azeotrope-like compositions of t-DCE, hexafluoropropylene dimer, and HFE449

[0077] Its characteristics are mainly physical and chemical properties, including density, boiling point, viscosity, surface tension, Kb value, flash point and flammability.

[0078] According to ASTM D56-05 (2010), the flash point standard test method of Tag closed cup tester was used to measure; the azeotrope-like mixture was measured using a density-viscosity tester; the boiling point of the azeotrope-like mixture was measured using an ebulliometer; according to GB / T 22237, the determination of the surface tension of surfactants, the azeotrope-like mixture was measured using a surface tension meter; according to GB / T11134-1989, the hydrocarbon solvent shell pine resin butanol value determination method, the KB value of the azeotrope-like mixture was measured. The results are listed in the following Table 2 in the form of a table.

[0079] Table 2

[0080]

[0081] As shown in Table 2, the azeotropic composition including 60-65 mass% of t-DCE, 25-30 mass% of hexafluoropropylene dimer and 11-15 mass% of HFE449 is non-flammable, and its composition formula has low viscosity, low surface tension and high KB value, which is conducive to fast and clean flow on the contact surface.

[0082] Example 4 Cleaning Capacity of Azeotropic or Azeotrope-like Compositions

[0083] Taking the partial azeotropic composition in Example 2 as an example, the specific components are: 62wt% trans-1,2-dichloroethylene, 26.6wt% hexafluoropropylene dimer and 11.4wt% HFE-347, and cleaning tests of pollutants (industrial stamping oil, well trace cutting oil and high temperature chain oil) were carried out on different surfaces (including glass and alloy surfaces).

[0084] 1) Preparation of contaminated surface

[0085] Weigh M1 and record the polished and pre-cleaned stainless steel and glass pieces with a size of 30×10 mm. Apply a small amount of lubricating oil with a cotton swab or dust-free cloth to the surface of the clean stainless steel piece, and weigh the contaminated stainless steel piece and record M2 for later use.

[0086] 2) Surface cleaning

[0087] The lubricating oil-carrying sheet was immersed in the solvent composition kept at 33°C and cleaned by ultrasonic for 5 minutes. The sheet was taken out of the solvent and dried, and the cleaned sheet was weighed and marked M3, and the lubricating oil removal percentage was calculated by the following formula.

[0088]

[0089] The cleaning performance results of the azeotropic or azeotrope-like compositions of the present invention are shown in Table 3.

[0090] Table 3

[0091]

[0092]

[0093] As shown in Table 3, the azeotropic composition has a cleaning rate of more than 80% for lubricating oils (including industrial stamping oils, well-trace cutting oils, and high-temperature chain oils) on metal surfaces and glass surfaces, and has a significant cleaning effect. It can be used for degreasing metal parts in metal processing or cleaning precision devices.

[0094] In addition, in some embodiments, the present invention also provides a method for depositing light oil stains on a surface, the method comprising the following specific steps:

[0095] 1) Attach light oil stains to the surface of incompatible liquids to form an oil film;

[0096] 2) The polished and pre-cleaned substrate is brought into contact with the oil film surface, and the oil film attached to the liquid phase surface is transferred to the substrate surface to form a uniform oil layer, which is immediately removed and dried.

[0097] The above is only a specific implementation case of the patent of the present invention, but the technical features of the patent of the present invention are not limited thereto. Any changes or modifications made by any technician in the relevant field within the field of the present invention are covered by the patent scope of the present invention.

Claims

1. A multi-component azeotropic or azeotrope-like composition, characterized in that: The composition comprises: The main agent, trans-1,2-dichloroethylene (t-DCE); and The second component is a fluorine-containing olefin.

2. The multi-component azeotropic or azeotrope-like composition according to claim 1, characterized in that: The fluorine-containing olefin is hexafluoropropylene dimer.

3. The multi-component azeotropic or azeotrope-like composition according to claim 1, characterized in that: The multi-component azeotropic or azeotrope-like composition further comprises a third component, and the third component is a hydrofluoroether.

4. The multi-component azeotropic or azeotrope-like composition according to claim 3, characterized in that: The hydrofluoroether is any one of 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether or 1,1,2,3,3,3-hexafluoropropyl-2,2,2-trifluoroethyl ether.

5. The multi-component azeotropic or azeotrope-like composition according to claim 1, characterized in that: In the multi-component azeotropic or azeotrope-like composition, the content of trans-1,2-dichloroethylene is 60% by mass to 80% by mass.

6. The multi-component azeotropic or azeotrope-like composition according to claim 1, characterized in that: The multi-component azeotropic or azeotrope-like composition comprises: 60 to 80% by mass of trans-1,2-dichloroethylene; 20 to 40% by mass of hexafluoropropylene dimer.

7. The multi-component azeotropic or azeotrope-like composition according to claim 1, characterized in that: The multi-component azeotropic or azeotrope-like composition comprises: 60 to 70% by mass of trans-1,2-dichloroethylene; 20 to 30 mass % of hexafluoropropylene dimer; 5 to 15 mass % HFE347.

8. The multi-component azeotropic or azeotrope-like composition according to claim 1, characterized in that: The multi-component azeotropic or azeotrope-like composition comprises: 60 to 65% by mass of trans-1,2-dichloroethylene; 25 to 30 mass % of hexafluoropropylene dimer; 10 to 15 mass % HFE449.

9. A method for cleaning stains on a substrate surface, characterized in that: The method comprises contacting and mixing the surface of the substrate to which the stain is attached with a sufficient amount of the multi-component azeotropic or azeotrope-like composition of any one of claims 1 to 8.

10. Use of the multi-component azeotropic or azeotrope-like composition according to any one of claims 1 to 8 in degreasing metal parts or cleaning precision devices during metal processing.

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