JP2797610B2 - Fluorinated chlorinated hydrocarbon-based mixed solvent composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a mixed solvent composition used for flux cleaning and removing adhering water of printed circuit boards, electronic components such as ICs, precision machine components, glass substrates and the like. .

[Prior art] 1,1,2-Trichloro-1,2,2-trifluoropropane (hereinafter referred to as R113) having features such as nonflammability, low toxicity, and excellent stability is used for flux washing and removal of attached water. That)
Mixed solvent compositions of alcohol and alcohol are widely used. Furthermore, since R113 has the feature of selectively dissolving various stains without attacking the base materials such as metals, plastics and elastomers, flux cleaning of printed circuit boards mounted with various electronic components made of metals, plastics, elastomers, etc. It was perfect for

[Problem to be Solved by the Invention] R113, which has been used conventionally, has various advantages, but is particularly stable chemically, so that it has a long life in the troposphere, diffuses into the stratosphere, Here, chlorine radicals generated by decomposition by sunlight cause a chain reaction with ozone and destroy the ozone layer, so that the use of the ozone layer has been restricted. For this reason, instead of the conventional R113, the search for alternative solvents that are less likely to destroy the ozone layer is being actively conducted.

An object of the present invention is to provide a novel fluorinated chlorinated hydrocarbon-based mixed solvent composition which can be used as a substitute solvent while satisfying the excellent properties of the conventional R113.

Means for Solving the Problems The present invention has been achieved to achieve the above-mentioned object, and a mixed solvent containing a mixture of a specific fluorinated chlorinated hydrocarbon having 3 carbon atoms and 2-propanol A composition.

The fluorinated chlorinated hydrocarbon in the present invention is 3,3-dichloro-1,1,1,2,2-pentafluoropropane (CF ₃ CF ₂ C
HCl ₂ , hereinafter R225ca) and 1,3-dichloro-1,1,2,
2,3-pentafluoropropane (CClF ₂ CF ₂ CHClF, hereinafter R2
25 cb), and the composition ratio of R225ca to R225cb is not particularly limited, but preferably, R225ca is 0.01 to 99.99% by weight and R225cb is 0.01 to 99.99% by weight.

The mixture composition ratio of the fluorinated chlorinated hydrocarbon and 2-propanol is 50 to 99% by weight of the fluorinated chlorinated hydrocarbon and 2-
It is 1 to 50% by weight of propanol.

The higher the content of 2-propanol, the higher the detergency, but if the content of 2-propanol exceeds 50% by weight, the mixed solvent composition becomes flammable.

Other components can be further added to and mixed with the composition of the present invention as needed. For example, in the use as a solvent, pentane, isopentane, hexane, isohexane, neohexane, heptane, isoheptane, 2,3-dimethylbutane, hydrocarbons such as cyclopentane, n-propyl alcohol, n-butyl alcohol, i Alcohols such as -butyl alcohol, s-butyl alcohol, t-butyl alcohol, propargyl alcohol, phenol, o-cresol, m-cresol, p-cresol, 2,6-di-t-butyl-p-cresol, bisphenol A, such as phenols, methyl cellosolve, tetrahydrofuran, 1,4-dioxane, butyl glycidyl ether, ethers such as 1,2-dimethoxymethane, ketones such as acetone, methyl ethyl ketone, methyl butyl ketone, nitromethane, nitroethane, nitro Nitroalkanes such as lopan, amines such as diethylamine, triethylamine, isopropylamine, butylamine, isobutylamine, diisopropylamine and diallylamine; esters such as ethyl acetate, propyl acetate, butyl acetate and methyl salicylate; α-amylene, β- Amylenes such as amylene, organic phosphites such as triphenyl phosphite and tributyl phosphite, 1,2-
Epoxides such as butylene oxide and epichlorohydrin, benzotriazoles such as 1,2,3-benzotriazole and 2- (2'-hydroxy-5'-methyl-phenyl) benzotriazole, dichloromethane, trans-1,2
-Dichloroethylene, cis-1,2-dichloroethylene, 2
-Halogenated hydrocarbons such as bromopropane, and others,
1,1-dichloro-1-fluoroethane, 1,1-dichloro-
1,2,2,3,3-pentafluoropropane, 1,2-dichloro-
1,1,3,3,3-pentafluoropropane, 1,1-dichloro-
2,3,3,3-tetrafluoropropene-1, trans-3-chloro-1,1,1,2,4,4,5,5,5-nonafluoropentene-
2, cis-3-chloro-1,1,1,2,4,4,5,5,5-nonafluoropentene-2,1,1,1,2,2,5,5,6,6, Freon other than the fluorinated chlorinated hydrocarbon in the present invention, such as 6-decafluorohexane, can be appropriately added.

The addition amount of these components is not particularly limited, but is preferably about 1 to 50% by weight, more preferably about 1 to 40% by weight when adjusting the dissolving power, and when adding as a stabilizer, Preferably it is about 1 ppm to 10% by weight, more preferably about 1 ppm to 3% by weight.

Since the fluorinated chlorinated hydrocarbon-based mixed solvent composition of the present invention has the same dissolving power as that of the conventional R113 / alcohol-based mixed solvent composition, it can be suitably used for various uses such as a solvent. Specific applications of the solvent include flux, grease, oil, wax, remover for ink, solvent for paint, extractant, glass, ceramics, plastic, rubber, various metal articles, especially IC parts, electric equipment, Examples of the cleaning agent include a precision machine, a cleaning agent for an optical lens, and a draining agent. Cleaning methods include hand wiping, dipping, spraying, rocking, ultrasonic cleaning,
Steam cleaning or the like may be employed.

[Examples] "Examples 1 to 3" Flux washing tests were performed using the mixed solvent compositions shown in Table 1. A flux (speedy flux AGF-JI: manufactured by Asahi Chemical Laboratory) is applied to the entire surface of a printed board made of glass epoxy (50 mm × 100 mm × 1.6 mm) and baked in an electric furnace at 250 ° C. for 2 minutes. It was immersed in the mixed solvent composition for 1 minute. Table 1 shows the degree of flux removal (A: good removal possible, Δ: trace remaining, ×: considerable remaining).

"Examples 4 to 6" Using the mixed solvent compositions shown in Table 2, an attached water removal test was performed. After immersing a glass plate of 30 mm x 18 mm x 5 mm in pure water, immersing the glass plate in the mixed solvent composition of the present invention for 20 seconds to perform drainage, and immersing the removed glass plate in anhydrous methanol to increase the water content in methanol. The removal status of the attached water was examined from the amount. Degree of removal of adhering water (◎: good removal possible,
Δ: trace amount remaining, ×: considerably remaining. ) Are shown in Table 2.

"Examples 7 to 9" Machine oil cleaning tests were performed using the mixed solvent compositions shown in Table 3. SUS-304 test piece (25mm x 30mm x
2mm) in machine oil (Nippon Oil CQ-30)
It was immersed in the mixed solvent composition of the present invention for 5 minutes. Table 3 shows the degree of removal of the machine oil (A: good cleaning possible, Δ: trace amount remaining, ×: considerable amount remaining).

"Example 10" R225ca / R225cb / 2-propanol = 30% by weight / 35% by weight
Tag type flash point measuring device (JIS-K226
The flash point was measured using 5). As a result, it was confirmed that the mixed solvent composition of the present invention had no flash point and was nonflammable.

[Effect of the Invention] The fluorinated chlorinated hydrocarbon-based mixed solvent composition of the present invention satisfies the excellent properties of the conventional R113 / alcohol-based mixed solvent composition, It has the advantages that it can be used in the same manner as the solvent composition and does not require a significant change in the prior art.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI (C11D 7/60 7:30 7:26) (56) References JP-A-2-286630 (JP, A) JP-A-2 JP-A-286631 (JP, A) JP-A-2-311430 (JP, A) JP-A-3-2129 (JP, A) JP-A-3-2130 (JP, A) JP-A-3-74338 (JP, A) JP-A-3-99029 (JP, A) JP-A-3-99030 (JP, A) JP-A-3-123744 (JP, A) JP-A-3-123745 (JP, A) Field (Int.Cl. ⁶ , DB name) C07C 19/10 B01D 12/00 C11D 7/50

Claims (1)

(57) [Claims] (1) Consisting of 3,3-dichloro-1,1,1,2,2-pentafluoropropane, 1,3-dichloro-1,1,2,2,3-pentafluoropropane and 2-propanol A mixture, wherein the total amount of 3,3-dichloro-1,1,1,2,2-pentafluoropropane and 1,3-dichloro-1,1,2,2,3-pentafluoropropane is 50 to 50. A fluorinated chlorinated hydrocarbon-based mixed solvent composition comprising a mixture of 99% by weight and 1 to 50% by weight of 2-propanol.