JPH0762392A - Solvent composition - Google Patents

Abstract

PURPOSE:To obtain a solvent compsn. which has excellent solvent characteristics inherent in R113 while scarecely affecting the stratospheric ozone layer by compounding a fluorohydrocarbon component mainly comprising 1,1,1,2,3,4,5,5,5- nonafluoro-2-trifluoromethylpentane (hereunder referred to as R 53-12 myee) with a halohydrocarbon. CONSTITUTION:A solvent compsn. is obtd. by compounding 50-99wt.% fluorohydrocarbon component mainly comprising R 53-12 myee with 1-50wt.% halohydrocarbon (e.g. dichloromethane), by compounding 80-99wt.% R 53-12 myee with 1-20wt.% 1,2-dichloroethane to give a pseudoazeotropic solvent compsn., or by compounding 10-50wt.% R 53-12 myee with 50-90wt.% 1,3- dichloro-1,1,2,-2,3-pentafluoropropane (referred to as R 225cb) to give a pseudoazeotropic solvent compsn. Thus obtd. compsn. has a solvency equivalent to that of R 113 and scarecely undergoes or does not undergo the change in compsn.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solvent composition used for degreasing and flux cleaning of printed circuit boards, electronic parts such as ICs, precision machine parts and glass substrates.

[0002]

2. Description of the Related Art 1,1,2-Trichloro-1,2,2-trifluoroethane (hereinafter referred to as R113), which is excellent in nonflammability, low toxicity and stability, is used for cleaning various oils and fats, fluxes, etc. A mixed solvent composition of R113 and a solvent soluble therein is widely used. R113 has a characteristic that it selectively dissolves various stains without damaging the base material such as metal, plastic, and elastomer. Therefore, various precision machine parts and various electronic parts made of metal, plastic, elastomer, etc., It was optimal for cleaning printed circuit boards, precision machine parts, optical parts, etc. on which these electronic parts were mounted.

[0003]

[Problems to be Solved by the Invention]
Although 113 has various advantages, it has a long chemical life in the troposphere and diffuses into the stratosphere where it is decomposed by ultraviolet rays to generate chlorine radicals. Chlorine radicals cause a chain reaction with stratospheric ozone and destroy the ozone layer, so its use is regulated.

Therefore, in place of the conventional R113, an alternative solvent that is less likely to destroy the ozone layer is being actively searched. An object of the present invention is to provide a novel fluorinated hydrocarbon solvent composition which can be used as a substitute solvent which has an extremely small effect on the ozone layer while satisfying the excellent properties of conventional R113. .

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned objects. First, 1, 1, 1, 2,
3,4,5,5,5-nonafluoro-2-trifluoromethylpentane (hereinafter referred to as R53-12myee)
There is provided a solvent composition comprising a fluorinated hydrocarbon containing as a main component and a halogenated hydrocarbon. The present invention secondly provides a solvent composition comprising a fluorinated hydrocarbon containing R53-12myee as a main component and 1,2-dichloroethane. Furthermore, the present invention is thirdly, R53-1
Fluorinated hydrocarbon containing 2 myee as a main component, and 1,3
-A solvent composition comprising dichloro-1,1,2,2,3-pentafluoropropane (hereinafter referred to as R225) is provided.

The halogenated hydrocarbons other than 1,2-dichloroethane and R225cb used in the composition of the present invention include dichloromethane, cis-1,2-dichloroethylene, trans-1,2-dichloroethylene,
Chlorinated hydrocarbons such as 1,1,1-trichloroethane, 1,1,2-trichloroethane, trichloroethylene and tetrachloroethylene, 2,2-dichloro-1,1,1
-Trifluoroethane, 1,1-dichloro-1-fluoroethane, 3,3-dichloro-1,1,1,2,2-pentafluoropropane, 1,1-dichloro-1,2,
2,3,3-pentafluoropropane, 1,2-dichloro-1,1,3,3,3-pentafluoropropane,
1,2-dichloro-1,1,2,3,3-pentafluoropropane, 2,3-dichloro-1,1,1,2,3-
Pentafluoropropane, 2,2-dichloro-1,1,
Examples include, but are not limited to, chlorinated fluorinated hydrocarbons such as 1,3,3-pentafluoropropane and mixtures thereof.

The mixed composition ratio of the solvent composition of the present invention is not particularly limited, but preferably 50 to 99% by weight of a fluorinated hydrocarbon containing R53-12myee as a main component and 1 to 50% by weight of a halogenated hydrocarbon. Is.

Further, R53-12myee and 1,2-dichloroethane were mixed to form a pseudo-azeotropic solvent composition over 80 to 99% by weight of R53-12myee and 1 to 20% by weight of 1,2-dichloroethane, and further R53-12myee9.
Since an azeotropic composition is produced with 6% by weight and 4% by weight of 1,2-dichloroethane, use within this range is preferable because there is little or no change in the composition.

In addition, R53-12myee and R225c
b is R53-12myee 10 to 50% by weight, R225
A pseudo-azeotropic solvent composition was prepared over 50 to 90% by weight of cb, and further R53-12myee 17% by weight, R225
Since an azeotropic composition is produced with 83% by weight of cb, use within this range is preferable because the composition can be used with little or no change in composition.

Further, as the fluorinated hydrocarbon which can be contained in the fluorinated hydrocarbon containing R53-12myee as the main component, 1,1,1,3,4,4,5,
C ₆ H ₂ F ₁₂ , such as 5,5-nonafluoro-2-trifluoromethylpentane, C ₆ H ₃ F ₁₁ , C ₆ H ₄ F ₁₀ ,
C ₆ HF ₁₃ and C ₆ H ₅ F ₉ are available.

In the present invention, R53-12myee in the fluorinated hydrocarbon containing R53-12myee as a main component.
Content of 50% by weight or more, preferably 60% by weight or more, and more preferably 70% by weight or more.

In the composition of the present invention, if necessary, at least one other component may be added to the solvent composition in an amount of 1-9.
It can be further added and mixed in the range of 0% by weight, preferably 5 to 50% by weight. For example, the following can be added as appropriate.

N-Pentane, 2-methylbutane, 2,2
-Dimethylpropane, n-hexane, 2-methylpentane, 3-methylpentane, 2,2-dimethylbutane,
2,3-dimethylbutane, n-heptane, 2-methylhexane, 3-methylhexane, 2,3-dimethylpentane, 2,4-dimethylpentane, n-octane, 2,
Hydrocarbons such as 2,3-trimethylpentane, 2,2,4-trimethylpentane, cyclopentane, cyclohexane, methylcyclohexane and ethylcyclohexane.

Alcohols such as methanol, ethanol, i-propanol, n-propanol, n-butanol, i-butanol, s-butanol and t-butanol, ketones such as acetone, methyl ethyl ketone, methyl butyl ketone and methyl isobutyl ketone. , Diethyl ether, methyl cellosolve, tetrahydrofuran, 1,
Ethers such as 4-dioxane, nitro compounds such as nitromethane, nitroethane, nitropropane and nitrobenzene, amines such as diethylamine, triethylamine, i-propylamine, butylamine and i-butylamine, ethyl acetate, propyl acetate, butyl acetate, etc. Esters.

Phenol, o-cresol, m-cresol, p-cresol, thymol, pt-butylphenol, t-butylcatechol, catechol, isoeugenol, o-methoxyphenol, 4,4'-dihydroxydiphenyl-2, 2-propane, isoamyl salicylate, benzyl salicylate, methyl salicylate, 2,
Phenols such as 6-di-t-butyl-p-cresol, 2- (2'-hydroxy-5'-methyl-phenyl) benzotriazole, 2- (2'-hydroxy-
3′-t-butyl-5′-methylphenyl) -5-chlorobenzotriazole, 1,2,3-benzotriazole, 1-[(N, N-bis-2-ethylhexyl) aminomethyl] benzotriazole and the like. Triazoles, etc.

The solvent composition of the present invention forms a pseudo-azeotrope or azeotrope composition which has a solubility similar to that of the conventional R113 system and has little or no composition change, and is suitable for various applications. Can be used for Such specific applications include flux, grease, oil, wax, ink removers, paint solvents, adhering water removal solvents, extractants, glass, ceramics, plastics, rubbers, various metallic articles, especially IC parts. , Electrical equipment, precision machinery, cleaning agents for optical lenses and the like.

As a cleaning method, hand-wiping, dipping, spraying, shaking, ultrasonic cleaning, steam cleaning or a combination thereof may be adopted.

[0018]

【Example】

Example 1 1000 g of a solvent composition having the composition shown in Table 1
Was placed in a distillation flask and attached to a rectification column having 5 theoretical plates.

[0019]

[Table 1]

Next, the composition was heated and totally refluxed for 2 hours, and after reaching an equilibrium state, a distillate was collected with time and analyzed by gas chromatography. The results are shown in Table 2.

[0021]

[Table 2]

Example 2 20 kg of a solvent composition consisting of 99% by weight of 53-12 myee and 1% by weight of 1,2-dichloroethane was placed in a small single tank type washing machine and operated for 6 hours per day for 3 days. Table 3 shows the results of gas chromatograph analysis by sampling from the cleaning tank and water separator over time.

[0023]

[Table 3]

Example 3 20 kg of a solvent composition consisting of 80% by weight of 53-12 myee and 20% by weight of 1,2-dichloroethane was placed in a small single tank type washing machine, and 6 times per day.
I drove for 3 days. Table 4 shows the results of gas chromatograph analysis by sampling from the cleaning tank and water separator over time.

[0025]

[Table 4]

Example 4 1000 g of a solvent composition having the composition shown in Table 5 was placed in a distillation flask and attached to a rectification column having 5 theoretical plates.

[0027]

[Table 5]

Next, the composition was heated and totally refluxed for 2 hours, and after reaching an equilibrium state, a distillate was collected with time and analyzed by gas chromatography. The results are shown in Table 6.

[0029]

[Table 6]

[Example 5] Solvent composition 20 comprising 50% by weight of R53-12myee and 50% by weight of R225cb
Put kg into a small single tank type washing machine and do 3 in 6 hours per day.
I drove for a day. Table 7 shows the results of gas chromatograph analysis by sampling from the cleaning tank and water separator over time.
Shown in.

[0031]

[Table 7]

Example 6 Solvent composition 20k comprising 10% by weight of 53-12 myee and 90% by weight of R225cb
g was placed in a small single-tank washing machine and operated for 6 hours per day for 3 days. Table 8 shows the results of gas chromatograph analysis by sampling from the cleaning tank and water separator over time.

[0033]

[Table 8]

[Examples 7 to 18] Machine oil cleaning tests were conducted using the cleaning solvent compositions shown in Tables 9 to 10. That is, a test piece of SUS-304 (25 mm x 30 m
m × 2 mm) was immersed in a machine oil (CQ-30 manufactured by Nippon Oil Co., Ltd.), and then 5 times in the cleaning solvent composition of the present invention shown in Tables 9 to 10.
It was soaked for a minute. The degree of removal of the mechanical oil was determined, and the results are shown in Tables 9 to 10 as the degree of removal.

[0035]

[Table 9]

[0036]

[Table 10]

Examples 19 to 24 Flux cleaning tests were conducted using the solvent compositions shown in Table 11. That is, a glass epoxy printed circuit board (50 mm × 10
Flux (Speedy Flux AGF-J-I: manufactured by Asahi Chemical Laboratory Co., Ltd.) was applied to the entire surface (0 mm × 1.6 mm) and soldered at a soldering temperature of 260 ° C. using a wave soldering machine, and then the present invention shown in Table 11 It was immersed in the solvent composition for 3 minutes and washed. The degree of flux removal was determined, and the results are shown in Table 11 as the removal degree.

[0038]

[Table 11]

[Examples 25 to 30] Removal tests of adhering water were conducted using the solvent compositions shown in Table 12. That is, 3
After immersing a 0 mm x 18 mm x 5 mm glass plate in pure water,
The glass composition was dipped in the solvent composition of the present invention shown in Table 12 for 20 seconds to remove water, and the glass plate taken out was dipped in anhydrous methanol to determine the state of removal of adhering water from the amount of increase in water content. Table 12 shows the degree of removal of the adhered water as the degree of removal.

[0040]

[Table 12]

[0041]

EFFECTS OF THE INVENTION 1, 1, 1, 2, 3, 4, 5, of the present invention
A solvent composition comprising 5,5-nonafluoro-2-trifluoromethylpentane and a halogenated hydrocarbon,
It has the advantages of satisfying the excellent characteristics of conventional R113 and having almost no effect on the stratospheric ozone layer.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location H05K 3/26 7511-4E (72) Inventor Masaaki Tsuzaki 10 Goi Kaigan, Ichihara City, Chiba Asahi Glass Co., Ltd. Chiba Plant (72) Inventor Yoko Usami 1160 Matsubara, Hazawa-machi, Kanagawa-ku, Yokohama, Kanagawa Prefecture AZ Technology Co., Ltd.

Claims (6)

[Claims] 1. A solvent comprising a fluorinated hydrocarbon and a halogenated hydrocarbon containing 1,1,1,2,3,4,5,5,5-nonafluoro-2-trifluoromethylpentane as main components. Composition. 2. 50 to 99% by weight of a fluorinated hydrocarbon containing 1,1,1,2,3,4,5,5,5-nonafluoro-2-trifluoromethylpentane as a main component and a halogenated hydrocarbon. The solvent composition according to claim 1, which comprises 1 to 50% by weight. 3. A fluorinated hydrocarbon containing 1,1,1,2,3,4,5,5,5-nonafluoro-2-trifluoromethylpentane as a main component in an amount of 80 to 99% by weight and 1,2- A pseudoazeotropic solvent composition comprising 1 to 20% by weight of dichloroethane. 4. An azeotropic solvent composition comprising 96% by weight of 1,1,1,2,3,4,5,5,5-nonafluoro-2-trifluoromethylpentane and 4% by weight of 1,2-dichloroethane. object. 5. A fluorinated hydrocarbon containing 1,1,1,2,3,4,5,5,5-nonafluoro-2-trifluoromethylpentane as a main component in an amount of 10 to 50% by weight and 1,3- Dichloro-1,1,2,2,3-pentafluoropropane 5
A pseudoazeotropic solvent composition comprising 0 to 90% by weight. 6. 17% by weight of 1,1,1,2,3,4,5,5,5-nonafluoro-2-trifluoromethylpentane and 1,3-dichloro-1,1,2,2,3 An azeotropic solvent composition consisting of 83% by weight of pentafluoropropane.