CN100441673C - Solvent Composition for Washing - Google Patents

Abstract

The invention provides a solvent composition for washing, wherein a propylene glycol solvent is mixed with 1, 1, 1, 3, 3-pentafluorobutane on the premise of not generating flammability.

Description

Solvent Composition for Washing

This application is a divisional application with the application number 02802396.X, the filing date of February 14, 2002, and the title of the invention "solvent composition for cleaning".

technical field

The present invention relates to a cleaning solvent composition mainly composed of 1,1,1,3,3-pentafluorobutane, and particularly relates to a technique for improving its cleaning ability.

Background technique

Chlorine-based solvents and fluorine-based solvents are generally used widely as flux detergents, solvents for dry cleaning, degreasing detergents, polishing and polishing detergents, protective layer stripping agents, and solvents for removing adhering water. However, in consideration of environmental problems, the use of chlorine-based solvents as substances that pollute groundwater and fluorine-based solvents as substances that destroy the ozone layer has been gradually controlled. Therefore, development of novel related solvents is desired in various quarters.

One, there is 1,1,1,3,3-pentafluorobutane (365mfc, chemical formula C ₄ H ₅ F ₅ ) (refer to JP-5-171189, JP-5-171190, JP-6-322394 No., Special Kaiping No. 7-188700, etc.). 1,1,1,3,3-Pentafluorobutane does not contain chlorine in its molecular structure, its ozone depletion coefficient (ODP) is 0, its toxicity is small, its warming coefficient (GWP) is small, and it has excellent environmental benefits. characteristic.

But the problem with 1,1,1,3,3-pentafluorobutane (365mfc) is that the KB value (kauributanol) is about 14, which is very low and has almost no degreasing ability. When KB is low, sufficient washing power cannot be exhibited as various detergents.

There are plans (refer to JP 5-171185 and JP 11-152236) to propose that in 1,1,1,3,3-pentafluorobutane, a dichloride with a degreasing degreasing power higher than its KB value is mixed. methane, or 1,1-dichloro-1-fluoroethane (HCFC141b) to increase the washing capacity.

However, since dichloromethane is highly toxic and has adverse effects on the human body during handling, it is not preferable to use it, and it may be difficult to use it as an object of future restrictions. 1,1-Dichloro-1-fluoroethane (141b) has been subject to regulation due to its high ozone layer destruction coefficient.

Contents of the invention

The present invention considers the above-mentioned problems, and its first object is to obtain a cleaning solvent composition containing 1,1,1,3,3-pentafluorobutane as a main component with high cleaning performance, especially high cleaning and degreasing performance.

The objects and features of the present invention other than those described above will be apparent from the description of this specification and the accompanying drawings.

In order to achieve the object, the present invention discloses the following configurations.

The first configuration of the present invention is characterized in that it contains (a) 1,1,1,3,3-pentafluorobutane and (b) selected from nitromethane, nitroethane, d-terpene and 3 - At least one solvent of methoxy butyl acetate, which is not flammable.

Nitromethane, nitroethane, d-terpene and 3-methoxy butyl acetate are the corresponding solvents for improving the washing ability of 1,1,1,3,3-pentafluorobutane are the present invention Human research results. It has excellent degreasing and washing ability in these solvents.

The second configuration of the present invention is characterized in that it contains 30 to 70% by weight of (a) 1,1,1,3,3-pentafluorobutane, and 30 to 70% by weight of (b) selected from nitromethane, At least one solvent or a mixed solvent of two or more of nitroethane, d-terpene, and 3-methoxybutyl acetate.

1,1,1,3,3-pentafluorobutane is set at 30 to 70% by weight, selected from nitromethane, nitroethane, d-terpene and 3-methoxy butyl ethyl At least one solvent or two or more mixed solvents in the acid ester is set in the range of 30 to 70% by weight because if the content is too low, the cleaning ability cannot be sufficiently improved and sufficient cleaning effect cannot be obtained. When the content is too high, the properties of nitromethane, nitroethane, d-terpene, and 3-methoxybutyl acetate are fully exhibited, flammability occurs, and they become combustibles.

The third main constitution of the present invention is characterized in that it contains 30 to 60% by weight of (a) 1,1,1,3,3-pentafluorobutane, and 40 to 70% by weight of (b) selected from nitromethane , nitroethane, d-terpene and 3-methoxy butyl acetate at least one solvent or a mixed solvent of two or more. This composition is sufficient for washing flux.

The fourth main configuration of the present invention is characterized in that it contains (a) 1,1,1,3,3-pentafluorobutane and (c) a propylene glycol-based solvent, and has no flammability.

The present inventors have found that there is also a propylene glycol-based solvent as a corresponding solvent for improving the cleaning ability of 1,1,1,3,3-pentafluorobutane. Propylene glycol-based solvents have a very strong solvency and are effective in degreasing and washing. Moreover, the propylene glycol solvent is non-toxic, very safe, easy to handle, and does not contain chlorine and fluorine in its molecular structure. The ozone destruction coefficient (ODP) and warming coefficient (GWP) are small, and it has the characteristics of not polluting the environment. By mixing such a solvent with 1,1,1,3,3-pentafluorobutane, it can be used to greatly improve the degreasing cleaning ability, and fully demonstrate the performance as various detergents.

However, propylene glycol-based solvents are flammable and have the corresponding disadvantages of flammable substances. However, because 1,1,1,3,3-pentafluorobutane is not flammable and is non-flammable, it can be formed by mixing with these non-flammable solvents. Non-flammable, safe flame retardant.

The fifth main constitution of the present invention is characterized by containing 10 to 80% by weight of (a) 1,1,1,3,3-pentafluorobutane, and 20 to 90% by weight of (c) one or more types propylene glycol based solvents.

The 1,1,1,3,3-pentafluorobutane is set in the range of 10 to 80% by weight, and the propylene glycol solvent is set in the range of 20 to 90% by weight, because when the content of the propylene glycol solvent is too low, it is not enough If the washing ability is improved, a sufficient washing effect cannot be obtained. When the content of the propylene glycol-based solvent is too high, flammability may occur and combustibles may be formed. By setting the compounding quantity as mentioned above, the solvent composition for cleaning which has sufficient cleaning power and has no inflammability can be obtained.

The sixth main constitution of the present invention is characterized by containing 10 to 70% by weight of (a) 1,1,1,3,3-pentafluorobutane, and 30 to 90% by weight of (c) one or more types propylene glycol based solvents. This composition can fully wash the flux.

In addition, the fourth to sixth main configurations of the present invention are characterized in that they contain (d) nitromethane, nitroethane, 3-methoxybutyl acetate, 3-methoxy-1 - At least one solvent selected from butanol and d-terpene.

The fourth to sixth main constitutions of the present invention are characterized in that they contain 5% by weight or more of a compound selected from (d) nitromethane, nitroethane, 3-methoxybutyl acetate, 3-methoxy - At least one solvent selected from 1-butanol and d-terpene.

As mentioned above, by containing nitromethane, nitroethane, 3-methoxy butyl acetate, 3-methoxy-1-butanol and d-terpene, the solubility can be further improved, showing Excellent detergency.

The best form for carrying out the invention

Embodiments of the cleaning solvent composition of the present invention will be described below. The solvent composition for washing|cleaning which concerns on this invention has the following 5 types.

[1] A solvent composition for cleaning, characterized in that it contains (a) 1,1,1,3,3-pentafluorobutane and (b) a difluoroethylene selected from nitromethane, nitroethane, d-terpene At least one solvent among alkenes and 3-methoxy butyl acetate, no flammability.

[2] A solvent composition for cleaning, characterized in that it contains 30 to 70% by weight of (a) 1,1,1,3,3-pentafluorobutane and 30 to 70% by weight of (b) selected from nitric acid At least one solvent or a mixed solvent of two or more of methyl methane, nitroethane, d-terpene, and 3-methoxy butyl acetate.

[3] A solvent composition for cleaning, characterized in that it contains 30 to 60% by weight of (a) 1,1,1,3,3-pentafluorobutane and 40 to 70% by weight of (b) selected from nitric acid At least one solvent or a mixed solvent of two or more of methyl methane, nitroethane, d-terpene, and 3-methoxy butyl acetate.

[4] A cleaning solvent composition comprising (a) 1,1,1,3,3-pentafluorobutane and (c) a propylene glycol-based solvent, and having no inflammability.

[5] A cleaning solvent composition characterized by containing 10 to 80% by weight of (a) 1,1,1,3,3-pentafluorobutane and 20 to 90% by weight of (c) one or more Two or more kinds of propylene glycol-based solvents.

[6] A cleaning solvent composition comprising 10 to 70% by weight of (a) 1,1,1,3,3-pentafluorobutane and 30 to 90% by weight of (c) one or more of Two or more kinds of propylene glycol-based solvents.

[7] The cleaning solvent composition is characterized in that, in the cleaning solvent composition mentioned in [4]-[6], it contains At least one solvent selected from butyl butyl acetate, 3-methoxy-1-butanol and d-terpene.

In the cleaning solvent composition mentioned in [1]-[3], [6], [7], nitromethane, nitroethane, d-terpene, 3-methoxy-butane can be mixed At least one solvent selected from acetyl acetate or 3-methoxy-1-butanol and d-terpene, of course, two or more solvents selected from them may be mixed.

The cleaning solvent composition involved in [7], the mixing amount of nitromethane, nitroethane, d-terpene, and 3-methoxy butyl acetate is too small, and the cleaning effect cannot be sufficiently improved. capacity, the lower limit thereof is preferably set at 5% by weight or more. Since there is a fear of flammability when the mixing amount of these solvents is too large, it is preferable to mix them appropriately to the extent that flammability does not occur. In addition, since these solvents are slightly more expensive than propylene glycol-based solvents, it is preferable to control the usage amount thereof as much as possible.

As the propylene glycol-based solvent used in the cleaning solvent composition referred to in [4]-[7], specifically, the following: propylene glycol methyl ether [PM] (boiling point: 120°C, flash point: 34°C), dipropylene glycol methyl ether Base ether [DPM] (boiling point: 188°C, flash point: 79°C), tripropylene glycol methyl ether [TPM] (boiling point: 242°C, flash point: 122°C), propylene glycol-n-butyl ether [PnB] (boiling point: 170°C, flash point: 62°C), dipropylene glycol-n-butyl ether [DPnB] (boiling point: 229°C, flash point: 106°C), tripropylene glycol-n-butyl ether (boiling point: 274°C, flash point: 138°C), propylene glycol methyl ether acetate [PMA] (boiling point: 146°C, flash point: 46.5°C), propylene glycol diacetate [PGDA] (boiling point: 190°C, flash point: 93°C), propylene glycol phenyl ether [PPh] (boiling point: 243°C, flash point: 121°C), propylene glycol monoethyl ether acetate (boiling point: 158°C, flash point: 53°C), etc. These propylene glycol-based solvents may be mixed alone or in combination.

For 1,1,1,3,3-pentafluorobutane, when it is used for washing under heating and steam, when the object to be washed is iron, zinc, aluminum, copper, brass, etc., sometimes it will not be affected by the metal Therefore, it is preferable to add at least one compound selected from nitro compounds, phenols, amines, ethers, pentenes, epoxy compounds, or triazoles as a stabilizer. The stabilizer is specifically as follows. Epoxides such as propylene oxide, 1,2-butylene oxide, and glycidol; phosphates such as dimethyl phosphate, diisopropyl phosphate, and diphenyl phosphate; trithiophosphorous acid Thiophosphites such as trilauryl ester; phosphine sulfites such as triphenoxyphosphine sulfite and trimethylphosphine sulfite; boric acid, triethyl borate, triphenyl borate , phenylboronic acid, diphenylboronic acid and other boron compounds; phenols such as 2,6-di-tert-butyl-p-cresol; nitroalkanes such as nitromethane and nitroethane; methyl acrylate, Acrylates such as ethyl acrylate; other dioxane, tert-butanol, pentaerythritol, p-isopropenyltoluene. The addition amount of these stabilizers is not particularly limited, but is preferably in the range of 0.01 to 5.00% by weight of the entire cleaning solvent composition.

The main applications of the cleaning solvent composition related to the present invention are, for example, degreasing detergents such as protective film stripping agents and flux detergents, greases, polishing and grinding detergents, adhesives (urethane or epoxy, silicon, etc.) ), solvents for dry cleaning, removers for grease, oil, paraffin, ink, etc., solvents for plastics, extractants, various items made of glass, ceramics, rubber, and metal, especially IC parts, electric appliances, and precision equipment , Detergents and water removers for optical lenses, etc.

In addition, as the cleaning method that can use the solvent composition for cleaning according to the present invention, there are mainly hand rubbing, dipping, spraying, ultrasonic cleaning, steam cleaning, and filling of adhesives (urethane, epoxy, silicon, etc.) The device is equipped with nozzle washing, which can be applied to other general washing.

"Machine Oil Washing Test 1"

In this test, a SUS-304 test piece (length 25 mm x width 30 mm x height 2 mm) was prepared, and the test piece was immersed in machine oil (CQ-30: manufactured by Nippon Oil Corporation) and then immersed in each cleaning solution. After about 3 minutes, the test piece was dried, and then the washing condition of the test piece was inspected. As a washing solvent, use 1,1,1,3,3-pentafluorobutane (365mfc), mix nitromethane, nitroethane, d-terpene and 3-methoxy butyl Acetate (3-MBA). Table 1 below shows the composition of the washing liquid and the washing effect.

Table 1

Machine oil washing test 1 (365mfc, nitroethane, nitromethane, d-terpene, 3-MBA)

○: Good ×: Poor washing effect

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

3-MBA: 3-methoxybutyl acetate

In 1,1,1,3,3-pentafluorobutane (365mfc), a mixture of propylene glycol methyl ether [PM] as a propylene glycol solvent, a mixture of propylene glycol-n-butyl ether [PnB ] and the mixed solution containing dipropylene glycol-n-butyl ether [DPnB], the test results are shown in Tables 2 to 4 below.

Table 2

Mechanical oil washing test 2 (365mfc·PM)

×: Poor washing effect ○: Good ◎: Very good

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

PM: Propylene Glycol Methyl Ether

table 3

Mechanical oil washing test 3 (365mfc PnB)

×: Poor washing effect ○: Good ◎: Very good

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

PnB: Propylene glycol-n-butyl ether

Table 4

Mechanical oil washing test 4 (365mfc·DPnB)

×: Poor washing effect ○: Good ◎: Very good

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

DPnB: Dipropylene glycol-n-butyl ether

As can be seen from the test results, in 1,1,1,3,3-pentafluorobutane (365mfc), mixed nitromethane, nitroethane, d-terpene, 3-methoxyl Butyl acetate or propylene glycol solvents can improve the cleaning ability and can wash machine oil. Furthermore, in this case, the mixing amount of nitromethane, nitroethane, d-terpene, and 3-methoxybutyl acetate needs to be set at 30% by weight or more. It is necessary to set the compounding quantity of a propylene glycol-type solvent to 20 weight% or more.

"Flux Washing Test 1"

In this test, flux (Tamura F-AL-4, manufactured by Tamura Manufacturing Co., Ltd.) is applied to the entire surface of the printed circuit board for testing, fired in an electric furnace at about 200°C for 2 minutes, and then immersed in a cleaning solution. about 3 minutes. After that, the printed substrate was dried, and then the state of washing was examined. In 1,1,1,3,3-pentafluorobutane (365mfc), mix nitromethane, nitroethane, d-terpene, 3-methoxy butyl acetate ( 3-MBA), and propylene glycol methyl ether [PM], propylene glycol-n-butyl ether [PnB], or dipropylene glycol-n-butyl ether [DPnB] as a propylene glycol-based solvent. The examination was conducted, and the test results are shown in Tables 5 to 8 below.

table 5

Flux wash test (365mfc, nitroethane, nitromethane, d-terpene, 3-MBA)

○: Good ×: Poor washing effect

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

3-MBA: 3-methoxybutyl acetate

Table 6

Flux washing test 2 (365mfc·PM)

×: Poor washing effect ○: Good ◎: Very good

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

PM: Propylene Glycol Methyl Ether

Table 7

Flux wash test 3 (365mfc·PnB)

×: Poor washing effect ○: Good ◎: Very good

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

PnB: Propylene glycol-n-butyl ether

Table 8

Flux wash test 4 (365mfc·DPnB)

×: Poor washing effect ○: Good ◎: Very good

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

DPnB: Dipropylene glycol-n-butyl ether

From the test results, it can be seen that by mixing nitromethane, nitroethane, d-terpene, 3-methoxybutyl acetate (3-MBA) or propylene glycol-based solvents, it was found that the cleaning ability can be improved , Washable flux. Furthermore, it has been found that p-nitromethane, nitroethane, d-terpene, and 3-methoxybutyl acetate (3-MBA) need to be mixed at least 40% by weight, and propylene glycol-based solvents need to be mixed at least 30% by weight. .

"Flammability Test"

In this test, nitromethane, nitroethane, d-terpene, 3-methoxybutyl acetate or Propylene glycol-based solvents were investigated for their flammability. 1,1,1,3,3-Pentafluorobutane (365mfc) has no flammability as mentioned above and is a non-combustible substance. In contrast, nitromethane, nitroethane, d-terpene, 3 -Methoxy butyl acetate or propylene glycol-based solvents are flammable and combustible, so there is a concern that they may become combustible after they are mixed. Therefore, in order not to cause flammability, an appropriate mixing amount of nitromethane, nitroethane, d-terpene, 3-methoxybutyl acetate, or a propylene glycol-based solvent was considered.

Prepare to mix nitromethane, nitroethane, d-terpene, 3-methoxy butyl acetate ( 3-MBA), and a propylene glycol-based solvent mixed with propylene glycol methyl ether [PM], propylene glycol-n-butyl ether [PnB], or dipropylene glycol-n-butyl ether [DPnB], Investigate the relationship between the mixing amount and flammability. The test results are shown in Tables 9 to 12 below. Its flammability was inspected by label sealing method.

Table 9

Flammability test 1 (365mfc, nitroethane, nitromethane, d-terpene, 3-MBA)

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

3-MBA: 3-methoxybutyl acetate

Table 10

Flammability test 2 (365mfc·PM)

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

PM: Propylene Glycol Methyl Ether

Table 11

Flammability test 3 (365mfc·PnB)

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

PnB: Propylene glycol-n-butyl ether

Table 12

Flammability Test 4 (365mfc·DPnB)

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

DPnB: Dipropylene glycol-n-butyl ether

As can be seen from the test results, for nitromethane and nitroethane above 80% by weight, d-terpene and 3-methoxy butyl acetate (3-MBA) above 95% by weight respectively Shows flammability, so in order to make it non-flammable, it is necessary to set the content of nitromethane and nitroethane to 70% by weight or less, and d-terpene, 3-methoxy butyl The content of acetate (3-MBA) is set at 90% by weight or less.

Propylene glycol methyl ether [PM] was found to be inflammable when mixed at 80% by weight or more. In the case of propylene glycol-n-butyl ether [PnB] and dipropylene glycol-n-butyl ether [DPnB], it was found that flammability occurs when they are mixed at 95% by weight or more. It can be seen from this that in order to prevent the flammability of the mixed propylene glycol solvent, it is necessary to control the mixing amount. For propylene glycol methyl ether [PM], it is 75% by weight or less; for propylene glycol-n-butyl ether [PnB] or dipropylene glycol -n-butyl ether [DPnB] is at most 90% by weight.

"Machine Oil Washing Test 2"

Next, nitromethane, nitroethane, 3-methoxy butyl acetate ( 3-MBA), 3-methoxy-1-butanol or d-terpene after the washing performance of the machine oil test to illustrate. In this test, in order to remarkably improve the cleaning ability of mixing these solvents, the case where the mixing amount of the propylene glycol-based solvent whose cleaning effect is not so good is 10 weight% or less was examined.

In the same manner as the previous test, a SUS-304 test piece (length 25 mm x width 30 mm x height 2 mm) was prepared, and the test piece was immersed in machine oil (CQ-30: manufactured by Nippon Oil Corporation), and then washed in each washing solution. After dipping for about 3 minutes, the test piece was dried, and then the washing condition of the test piece was examined. The test results are shown in Tables 13-15 below.

Table 13

Machine oil washing test 5 (365mfc, PM, nitroethane, nitromethane, 3-MBA, 3-M-1-B, d-terpene)

×: Poor washing effect ○: Good ◎: Very good

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

PM: Propylene Glycol Methyl Ether

3-MBA: 3-methoxybutyl acetate

3-M-1-B: 3-methoxy-1-butanol

Table 14

Machine oil washing test 6 (365mfc, PnB, nitroethane, nitromethane, 3-MBA, 3-M-1-B, d-terpene)

×: Poor washing effect ○: Good ◎: Very good

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

PnB: Propylene glycol-n-butyl ether

3-MBA: 3-methoxybutyl acetate

3-M-1-B: 3-methoxy-1-butanol

Table 15

Machine oil washing test 7 (365mfc, DPnB, nitroethane, nitromethane, 3-MBA, 3-M-1-B, d-terpene)

×: Poor washing effect ○: Good ◎: Very good

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

DPnB: Dipropylene glycol-n-butyl ether

3-MBA: 3-methoxybutyl acetate

3-M-1-B: 3-methoxy-1-butanol

As can be seen from the test results, by mixing nitromethane, nitroethane, 3-methoxy butyl acetate (3-MBA), 3-methoxy-1-butanol or d-terpene di Alkene, the cleaning ability is stronger than when only propylene glycol-based solvent is mixed. When 1,1,1,3,3-pentafluorobutane (365mfc) is 85% by weight, the mixing amount of these solvents is preferably set at least 5% by weight or more.

"Flux Washing Test 2"

Flux wash after mixing nitromethane, nitroethane, 3-methoxybutyl acetate (3-MBA), 3-methoxy-1-butanol or d-terpene The test is explained. In order to remarkably improve the cleaning ability of mixing these solvents, it was considered that the mixing amount of the propylene glycol-based solvent whose cleaning effect is not so good is 20% by weight or less.

Similar to the previous test, in this test, flux (Tamura F-AL-4, manufactured by Tamura Manufacturing Co., Ltd.) is applied to the entire surface of the printed circuit board for testing, and it is sintered in an electric furnace at about 200°C for 2 minutes. Then soak in the washing liquid for about 3 minutes. Thereafter, the printed boards were dried, and the washing state was examined. The test results are shown in Tables 16 to 18 below.

Table 16

Flux wash test 5 (365mfc, PM, nitroethane, nitromethane, 3-MBA, 3-M-1-B, d-terpene)

×: Poor washing effect ○: Good

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

PM: Propylene Glycol Methyl Ether

3-MBA: 3-methoxybutyl acetate

3-M-1-B: 3-methoxy-1-butanol

Table 17

Flux wash test 6 (365mfc, PnB, nitroethane, nitromethane, 3-MBA, 3-M-1-B, d-terpene)

×: Poor washing effect ○: Good

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

PnB: Propylene glycol-n-butyl ether

3-MBA: 3-methoxybutyl acetate

3-M-1-B: 3-methoxy-1-butanol

Table 18

Flux wash test 7 (365mfc, DPnB, nitroethane, nitromethane, 3-MBA, 3-M-1-B, d-terpene)

×: Poor washing effect ○: Good

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

DPnB: Dipropylene glycol-n-butyl ether

3-MBA: 3-methoxybutyl acetate

3-M-1-B: 3-methoxy-1-butanol

As can be seen from the test results, mixing nitromethane, nitroethane, 3-methoxyl butyl acetate, 3-methoxyl-1-butanol is more effective than mixing only propylene glycol solvents (PM, PnB , DPnB) can improve the washing ability. The mixing amount of these nitromethane, nitroethane, 3-methoxyl butyl acetate or 3-methoxyl-1-butanol is preferably in the range of 1,1,1,3,3-pentafluoro When butane (365mfc) is 75% by weight, it is set to 15% by weight or more. In addition, no good results were obtained for d-terpenes.

"Effects on plastic or rubber, etc."

The following test investigates the impact of the detergent solvent composition involved in the present invention on various plastics or rubbers. In this test, plastics prepared soft vinyl chloride, rigid vinyl chloride, polycarbonate (PC), acrylic resin, nylon 66 (registered trademark), polyacetal, polyurethane resin, phenolic resin, epoxy Resin, melamine-formaldehyde resin, urea resin, polyethylene, polypropylene, rubber preparation Fluororubber, neoprene, silicone rubber, urethane rubber, SBR, natural rubber, butyl rubber, respectively impregnated with washing liquid at room temperature 6 hours to test. Afterwards, drying treatment was carried out, and the presence or absence of influence was examined. The test results are shown in Tables 19-22 below.

Table 19

Effects on plastics, rubber, etc. 1 (365mfc, nitroethane, nitromethane)

○: no influence ×: influence

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

Table 20

Effects on plastics, rubber, etc. 2 (365mfc, d-terpene, 3-MBA)

○: no influence ×: influence

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

3-MBA: 3-methoxybutyl acetate

Table 22

Effects on plastics, rubber, etc. 4 (365mfc, DPnB)

○: no influence ×: influence

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

DPnB: Dipropylene glycol-n-butyl ether

From the test results, it can be seen that the solvent composition for cleaning according to the present invention does not have adverse effects on various plastics or rubbers.

"Metal Corrosion Test"

In this test, according to JIS-K1600, aluminum sheets (JIS-H-4000, A1100P) were prepared on the liquid phase part and the gas phase part of the washing liquid after washing, and the metal corrosion state after about 48 hours was investigated. The results are shown in Tables 23 and 24 below.

Table 23

Metal corrosion test 1 (365mfc, nitroethane, nitromethane, d-terpene, 3-MBA)

×: corrosion ○: no corrosion

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

3-MBA: 3-methoxybutyl acetate

Table 24

Metal Corrosion Test 2 (365mfc, PM, PnB, DPnB)

○: Good ×: Poor washing effect

365mfc: 1,1,1,3,3-pentafluorobutane (C ₄ H ₅ F ₅ )

PM: Propylene Glycol Methyl Ether

PnB: Propylene glycol-n-butyl ether

DPnB: Dipropylene glycol-n-butyl ether

It can be seen from the test results that none of the cleaning solvent compositions of the present invention has any adverse effect on metals.

Possibility of industrial use

The first cleaning solvent composition of the present invention contains nitromethane, nitroethane, d-terpene, 3-methoxybutane in 1,1,1,3,3-pentafluorobutane Glyceryl acetate can greatly improve the washing ability, especially the degreasing washing ability, and can make it fully play the washing performance. Because it is not flammable and does not become a dangerous substance, it can be used safely. At the same time, its ozone destruction coefficient (ODP) and warming coefficient (GWP) are also small, which is beneficial to the environment.

The second cleaning solvent composition of the present invention contains 30 to 70% by weight of (a) 1,1,1,3,3-pentafluorobutane, 30 to 70% by weight of (b) selected from nitromethane , nitroethane, d-terpene and 3-methoxy butyl acetate at least one solvent or a mixture of two or more solvents can avoid nitromethane, nitroethane, d- If the blending amount of terpene and 3-methoxybutyl acetate is too small, it will be difficult to improve the detergency, and if the blending amount of these solvents is too large, the occurrence of flammability can be prevented.

The third cleaning solvent composition of the present invention contains at least one of nitromethane, nitroethane, d-terpene and 3-methoxy butyl acetate in the range of 40 to 70% by weight. One solvent or a mixture of two or more solvents is enough to wash the flux.

The fourth cleaning solvent composition of the present invention contains 1,1,1,3,3-pentafluorobutane and propylene glycol-based solvents, can greatly improve the cleaning ability, especially the degreasing cleaning ability, and can be used as various detergents. full performance. Moreover, propylene glycol solvents are non-toxic, very safe, easy to handle, and do not contain chlorine or fluorine in their molecular structure, and their ozone destruction coefficient (ODP) and warming coefficient (GWP) are also small, so they have environmentally friendly characteristics. Moreover, by coordinating with 1,1,1,3,3-pentafluorobutane, the shortcoming of flammability of propylene glycol solvents can be overcome, and a safe flame retardant without flammability can be made.

The fifth cleaning solvent composition of the present invention contains 10 to 80% by weight of (a) 1,1,1,3,3-pentafluorobutane, and 20 to 90% by weight of (d) one or more types Propylene glycol-based solvents can avoid insufficient washing performance when the mixing amount of propylene glycol-based solvents is too low, or can control flammability when the mixing amount of propylene glycol-based solvents is too high.

The sixth cleaning solvent composition of the present invention contains 30 to 90% by weight of one or two or more propylene glycol-based solvents, and can sufficiently clean flux.

The cleaning solvent composition of the 4th to 6th of the present invention contains a solvent selected from (b) nitromethane, nitroethane, 3-methoxy butyl acetate, 3-methoxy-1-butan At least one kind of solvent among alcohol and d-terpene can improve the dissolving power and can exhibit strong detergency.

Claims (4)

1. A solvent composition for washing, characterized in that it contains: 10 to 80% by weight of (a) 1,1,1,3,3-pentafluorobutane, 20 to 90% by weight of (c) selected from propylene glycol methyl ether, dipropylene glycol methyl ether, tripropylene glycol methyl ether, propylene glycol-n-butyl ether, dipropylene glycol-n-butyl ether, tripropylene glycol methyl ether, One or more solvents of propylene glycol-n-butyl ether, propylene glycol methyl ether acetate, propylene glycol diacetate, propylene glycol phenyl ether, and propylene glycol monoethyl ether acetate. 2. The solvent composition for washing according to claim 1, characterized in that it contains: 10 to 70% by weight of the above (a) 1,1,1,3,3-pentafluorobutane, 30 to 90% by weight of the above (c) is selected from propylene glycol methyl ether, dipropylene glycol methyl ether, tripropylene glycol methyl ether, propylene glycol-n-butyl ether, dipropylene glycol-n-butyl ether, tripropylene glycol methyl ether, - One or more solvents of propylene glycol-n-butyl ether, propylene glycol methyl ether acetate, propylene glycol diacetate, propylene glycol phenyl ether, and propylene glycol monoethyl ether acetate. 3. The washing solvent composition as described in any one of claims 1 to 2, wherein (d) is selected from the group consisting of nitromethane, nitroethane, 3-methoxy butyl acetate, 3 - at least one solvent selected from methoxy-1-butanol and d-terpene. 4. The cleaning solvent composition as described in any one of claims 1 to 2, wherein more than 5% by weight of (d) is selected from the group consisting of nitromethane, nitroethane, 3-methoxy butyl At least one solvent selected from acetate, 3-methoxy-1-butanol, and d-terpene.