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Partially azeotropic composition

An azeotropic composition, a technology for the composition, applied in the directions of detergent compositions, non-surface-active detergent compositions, organic non-surface-active detergent compositions, etc., can solve the problem of rising equipment costs, poor cleaning ability of fluorine-containing solvents, Solubility, self-extinguishing restrictions, etc.

Active Publication Date: 2006-11-15
TOKUYAMA METEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the components constituting the composition forming an azeotropic mixture are limited by their types and composition ratios, so the solubility and self-extinguishing properties of the cleaning composition, which depend on the types and composition ratios of the components, are similarly restricted.
[0012] As mentioned above, even if the cleaning agent proposed so far as a substitute for CFC113 is used for cleaning, it will be banned in the future due to the problem of depletion of the ozone layer. Fluorine-containing solvents have poor cleaning ability and cannot be fully cleaned. Even if a flammable high-boiling solvent that improves solubility is added to the fluorine-containing solvent, a certain cleaning performance cannot be maintained due to changes in the composition of the cleaning agent. Dangerous, it is necessary to install an explosion-proof structure in the washing machine and other equipment, which will increase the cost of the equipment. Therefore, as a substitute for CFC113, it has various properties required, namely environmental safety, cleaning, drying, low flammability, Cleaning agents with all these properties of self-extinguishing properties, low toxicity, and compositional stability still have many problems in use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0215]

[0216] (1) Reflow test

[0217] In order to confirm that the cleaning agents described below are partially azeotropic compositions, and to determine the make-up and rinse composition, a reflux test was performed according to the following gist.

[0218] As the volatile component (A) and the non-volatile component (B) satisfying formula (1) and formula (2), each component of Table 1 and Table 2 was mixed with the composition described in each table, and the cleaning agent was prepared. 300ml of the cleaning agent obtained was dropped into a 500ml eggplant-shaped flask equipped with a reflux device, and after reflux for 2 hours, the condensate distilled off from the top was sampled, and its composition was analyzed by gas chromatography. The obtained analytical value is used as the composition of the make-up solution and the rinse solution. The composition analysis values ​​at this time are shown in Table 1 and Table 2.

[0219] As shown in Table 1, any of the compo...

Embodiment 6～24

[0266] Each component was mixed with the composition shown in Table 5, and the cleaning agent which has the desired partial azeotropic composition was obtained. Table 5 shows the results of the above-mentioned (4) cleaning test and (5) flux cleaning test for each cleaning agent. By using 2H, 2H, 4H, 4H, 4H-perfluorobutane (HFC365mfc) in combination as the component (A1), one or more of the components selected from the number of fluorine atoms and the number of hydrogen atoms in the molecule as the component (A2) Compared with the compound of 2 or more chlorine-free fluorine compounds, and the vapor pressure at 20°C as component (B) is lower than 1.33×10 3 A compound of Pa can be used to obtain a cleaning agent with excellent solubility in processing oil and flux.

Embodiment 25～37

[0274] Each component was mixed with the composition shown in Table 6, and the cleaning agent which has the desired partial azeotropic composition was obtained. Table 6 shows the results of the above-mentioned (6) fire point measurement for each cleaning agent. Combination of component (A1) 2H, 2H, 4H, 4H, 4H-perfluorobutane (HFC365mfc), component (A2) one or two or more selected from the ratio of the number of fluorine atoms in the molecule to the number of hydrogen atoms is 2 or more Compounds of fluorine compounds that do not contain chlorine, and component (B) has a vapor pressure at 20°C of less than 1.33×10 3 The compound of Pa confirmed that its ignition point disappeared.

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Abstract

A nonazeotropic multi-component composition which comprises: two or more volatile ingredients especially comprising HFC365mfc and a chlorine-free fluorine compound in which the molecule has a ratio of the number of fluorine atoms to that of hydrogen atoms of 2 or higher; and one or more high-boiling nonvolatile ingredients. The composition is excellent in detergency, volatility, safety, and environmental preservation. It is suitable for use as a detergent composition whose compositional fluctuations can be easily controlled over long-term use.

Description

technical field [0001] The present invention relates to a composition suitable for cleaning agents and rinsing agents and a cleaning method using the cleaning agents and rinsing agents, used for cleaning processing oils, greases, waxes used for processing precision mechanical parts, optical mechanical parts, etc., welding electrical appliances Flux used with electronic components, ink and paste attached to screens used in board production, and resin attached to the mixing section of resin extruders. Background technique [0002] When processing precision mechanical parts, optical mechanical parts, etc., various processing oils are used, such as cutting oil, molding oil, drawing oil, heat treatment oil, antirust oil, lubricating oil, etc., or grease, wax, etc., but in the end The contamination caused by them must be removed, generally by the use of solvents. [0003] As a connection method for electronic circuits, soldering is most commonly used. In general, in order to remo...

Claims

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Application Information

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IPC IPC(8): C11D7/30B08B3/08B08B3/12C11D7/26C11D7/28C11D7/50C23G5/028C23G5/032
CPCC11D7/5018B08B3/12C11D7/28C23G5/02803
Inventor 松本省慈加藤谦一
Owner TOKUYAMA METEL
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