JP2870577B2 - Solvent composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorinated solvent, and more particularly to a fluorinated solvent used for removing dirt such as flux and oil or moisture from the surface of an article.

[0002]

2. Description of the Related Art In order to remove dirt or moisture such as flux and oil, it is necessary to use a non-flammable, low-toxic and stable CCl.
₂ FCClF ₂ (hereinafter referred to as Freon 113) or a mixed solvent composition of Freon 113 and a solvent soluble therein is widely used. CFC 113 has a feature of selectively dissolving various stains without invading a base material such as metal, plastic, and elastomer. Therefore, various precision mechanical parts and various electronic parts made of metal, plastic, elastomer, etc. It was optimal for cleaning optical components.

[0003]

The CFC 113 used conventionally has various advantages, but is extremely stable chemically, so that it has a long life in the troposphere and diffuses into the stratosphere, Here, it is photolyzed by ultraviolet rays to generate chlorine radicals. These chlorine radicals cause a chain reaction with stratospheric ozone and destroy the ozone layer, so that their production and consumption are regulated. The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a novel fluorine-based solvent which does not impair the excellent properties of the conventional CFC 113 and does not cause the ozone layer destruction. .

[0004]

According to the present invention, CF ₃ CF ₂ CF ₂ —O—CH _{2 is used} as a solvent to solve the above problems.
In fluorinated solvent characterized by comprising at least one fluorine-containing ether selected from F and _{CF 3 CF 2 CH 2 -O-} CF 2 CF 3 or Ranaru group.

The above fluorinated ethers do not have a flash point.

Among these fluorinated ethers, CF _{3
CF 2 CH 2 -O-CF 2} CF 3 are readily obtained by reacting with an alkylating agent such as trifluoromethyl sulfonic acid ester, for example, corresponding acid fluoride or acid chloride corresponding to the presence of potassium fluoride Can be

Further, CF ₃ CF ₂ CF ₂ —O—CH ₂ F
Can be easily obtained, for example, by chlorinating CF ₃ CF ₂ CF ₂ —O—CH ₃ and then fluorinating it.

The main physical properties of the fluorinated ether used in the present invention are shown in Table 1. The fluorine-based solvent of the present invention may further contain other components as necessary. For example, hydrocarbons, fluorinated hydrocarbons, alcohols, fluorinated alcohols, ethers, ketones, esters,
One or more selected from the group consisting of organic nitrogen compounds, organic sulfur compounds and organosilicon compounds,
1 to 50% by weight, preferably 1 to 20% by weight in the fluorinated solvent
% By weight.

Specific examples of the hydrocarbons include pentane, hexane, heptane, octane, cyclohexane,
Examples thereof include aliphatic or aromatic hydrocarbons such as benzene and toluene. As fluorinated hydrocarbons, H
FC43-10mee (CF ₃ CF ₂ CHFCHFCF
₃ ), HFC338pcc (CHF ₂ CF ₂ CF ₂ CH)
F ₂ ). Alcohols include methanol, ethanol, propanol, isopropanol,
Butanol, carbitol and the like. Examples of the fluorinated alcohol include trifluoroethanol, hexafluoro-2-propanol, pentafluoropropanol and the like.

As ethers, diethyl ether,
Examples include diisopropyl ether, dibutyl ether, tetrahydrofuran, monoglyme, diglyme and the like. Ketones include acetone, methyl ethyl ketone, 2-pentanone, 3-pentanone, cyclopentanone, cyclohexanone and the like. Esters include carboxylate esters such as formate ester and acetate ester.

The organic nitrogen compounds include acetonitrile, nitrobenzene, dimethylformamide, N-methylpyrrolidone and the like. Examples of the organic sulfur compounds include dimethyl sulfoxide, sulfolane and the like. Specific examples of the organosilicon compounds include tetramethylsilane, tetraethylsilane, methoxytrimethylsilane, ethoxytrimethylsilane, hexamethyldisiloxane, octamethylcyclotetrasiloxane, and the like.

When used under severe conditions, the fluorine-based solvent of the present invention may further contain various stabilizers.
Stabilizers that are entrained in the distillation operation,
Alternatively, those which form an azeotropic mixture are desirable.

Specific examples of such a stabilizer include aliphatic nitro compounds such as nitromethane and nitroethane; aromatic nitro compounds such as nitrobenzene and nitrostyrene; dimethoxymethane; 1,2-dimethoxyethane;
Ethers such as 1,4-dioxane and 1,3,5-trioxane; glycidol, methyl glycidyl ether,
Epoxides such as allyl glycidyl ether, phenyl glycidyl ether, 1,2-butylene oxide, cyclohexene oxide, epichlorohydrin; hexene;
Unsaturated hydrocarbons such as heptene, pentadiene, cyclopentene and cyclohexene; ethylene alcohols such as allyl alcohol and 1-buten-3-ol; 3-methyl-1-butyn-3-ol; 3-methyl-1- Acetylenic alcohols such as pentyn-3-ol, methyl acrylate, ethyl acrylate, butyl acrylate,
Acrylic acid or methacrylic acid esters such as vinyl methacrylate are exemplified. These stabilizers may be used alone or in combination of two or more.

Further, in order to obtain a synergistic stabilizing effect, phenols, amines and benzotriazoles may be used in combination. The amount of the stabilizer used depends on the type of the stabilizer and the like, but is usually 0.01 in the fluorinated solvent of the present invention.
It is desirably in the range of 10 to 10% by weight, preferably 0.1 to 5% by weight.

The fluorine-based solvent of the present invention has a detergency,
In order to further improve the interfacial action and the like, various surfactants may be contained as necessary. As a surfactant,
Sorbitan fatty acid esters such as sorbitan monooleate and sorbitan trioleate; polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene sorbitan monooleate; polyethylene glycol fatty acid esters such as polyoxyethylene monolaurate;
Nonionic surfactants such as polyoxyethylene alkyl ethers such as polyoxyethylene lauryl ether; polyoxyethylene alkyl phenyl ethers such as polyoxyethylene nonyl phenyl ether; polyoxyethylene fatty acid amides such as polyoxyethylene oleic amide Agents, and may be used alone or in combination of two or more.

For the purpose of synergistically improving the detergency and interfacial action, a cationic surfactant or an anionic surfactant may be used in addition to these nonionic surfactants. The amount of the surfactant used varies depending on the type and the like, but is usually 0.1 to 20% by weight, preferably 0.3 to 5% by weight in the fluorine-based solvent of the present invention.

The fluorine-based solvent of the present invention can be used to remove dirt such as flux and oil or moisture from the surface of an article, and is extremely useful as a substitute for the conventional fluorocarbon 113 and 1,1,1-trichloroethane. It is. The stains that can be removed include stains such as flux, oil, grease, wax, and ink, and various stains that are removed by dry cleaning.

The types of articles include electronic parts (printed circuit boards, liquid crystal displays, magnetic recording parts, semiconductor materials, etc.), electric parts, precision mechanical parts, resin processed parts, optical lenses, clothing and the like. As a method for removing dirt or moisture, a conventionally used method such as immersion, spraying, boiling cleaning, ultrasonic cleaning, steam cleaning, or a combination thereof can be adopted. Further, the fluorine-based solvent of the present invention,
Solvents for paints, extractants, reaction solvents,
It can also be used for various applications such as a heating medium and a foaming agent.

[0019]

The following examples are provided to further clarify the features of the present invention. Of course, the present invention is not limited by these examples. [Example 1] Flux cleaning tests were performed using the fluorinated ethers shown in Table 2. Test piece (SUS-316; 50
mm × 10 mm × 1 mm) in a flux [GX-8S manufactured by Asahi Chemical Laboratory], and then taken out to 200 ° C.
For 1 minute. The test piece was subjected to ultrasonic cleaning for 1 minute in Reference Example 1 and then dried with warm air. The removal status of the flux (良好; good, ×; bad) was visually observed,
The results are shown in Table 2 (Nos. 1 and 2 ).

Reference Example 1, Comparative Example 1 A test was conducted in the same manner as in Example 1 except that Freon 113 and perfluorohexane were used instead of the fluorinated ether of Example 1, and the results were shown in Table 2 ( No. 3 : Reference Example 1,
No. 4 : Shown in Comparative Example 1).

Example 2 A mixed composition of 95% by weight of the fluorinated ether shown in Table 3 and 5% by weight of methanol (MeOH), 5% by weight of ethanol (EtOH), or 5% by weight of isopropanol (iPrOH) was used. A test for removing adhered water was performed separately. Glass plate (30 mm x 2
(0 mm × 1 mm) was immersed in pure water, and then immersed in the above mixed composition for 30 seconds. The removed glass plate was allowed to stand at room temperature for 1 minute to evaporate the remaining mixed composition, and then immersed in anhydrous methanol, and the increase in water content of the methanol was measured by a Karl Fischer moisture meter.
On the other hand, from the comparison with the amount of increase in water content of methanol when only immersed in pure water but not immersed in the above-mentioned mixed composition, the removal state of attached water (（; good, ×; poor) was examined.
The results are shown in Table 3 (Nos. 1 and 2 ).

Reference Example 2 A test was conducted in the same manner as in Example 2 except that Freon 113 was used in place of the fluorinated ether of Example 2, and the results were shown in Table 3 (No. 3 : Reference Example 2). )Pointing out toungue.

[0023]

[Table 1]

[0024]

[Table 2]

[0025]

[Table 3]

[0026]

According to the present invention, by adopting the above structure, there is no fear of destruction of the ozone layer because it does not contain chlorine atoms, and since it contains hydrogen atoms, its reactivity with hydroxyl radicals in the atmosphere is reduced. Therefore, it is possible to provide a solvent composition which has a small greenhouse effect and is useful as a solvent for washing and draining and drying instead of chlorofluorocarbon 113 because it is easily decomposed in the troposphere.

──────────────────────────────────────────────────続 き Continued on the front page (73) Patent holder 000002004 Showa Denko Co., Ltd. 1-13-9 Shiba-Daimon, Minato-ku, Tokyo (73) Patent holder 000002200 Central Glass Co., Ltd. 5253 Oki Ube, Daiji, Ube City, Yamaguchi Prefecture ( 73) Patent holder 000174851 Mitsui-Dupont Fluorochemicals Co., Ltd. 1-5-18, Sarugaku-cho, Chiyoda-ku, Tokyo (73) Patent holder 000003300 Tosoh Corporation 4560 Kaisei-cho, Shinnanyo-shi, Yamaguchi Prefecture Attorney Akira Uchida (2 outsiders) (72) Inventor Atsushi Suga 2-40-17 Hongo, Bungo-ku, Tokyo Hongo Iwai Building 6F New Generation Refrigerant Project Room (72) Inventor Shiro Yamashita Hongo Iwai Building 6F, Hongo 2-40-17 Hongo, Bunkyo-ku, Tokyo Room (72) Inventor Haruaki Ito 2-40-17 Hongo, Bungo-ku, Tokyo Hongo Iwai Building 6F 6th floor of the Hongo Iwai Building Foundation for Global Environmental Innovation New Generation Refrigerant Project Room (72) Inventor Goto Yoshihiko 2-40-17 Hongo, Bunkyo-ku, Tokyo Hongo Iwai Building, 6th floor, New Generation Refrigerant Project, National Institute for Global Environmental Technology (72) Inventor Yuji Mochizuki 2-40-17 Hongo, Hongo, Bunkyo-ku, Tokyo 6th floor of the building New Generation Refrigerant Project, Research Institute of Innovative Technology for the Earth Room (72) Inventor, Nagataka Nobutaka 2-40-17, Hongo, Bunkyo-ku, Tokyo 6th floor of Hongo Iwai Building 6th floor Refrigerant Project Room (72) Inventor Akira Sekiya 1-1-1 Higashi, Tsukuba-shi, Ibaraki Pref. 1692 (JP, A) JP-A-4-273839 (JP, A) JP-A-56-138127 (JP, A) JP-A 8-245468 (JP, A) JP-A 8-245471 (JP, A) JP-A-7-179387 (JP, A) JP-A-8-34755 (JP, A) JP-A-8-34754 (JP, A) US Patent 3,767,688 (US, A) US Patent 3,981,110 (US, A) US Patent 3,987,203 (US, A) WO 96-22356 (WO, A1) WO 95-6669 (WO, A1) French Patent Application 1506638 (FR, A1) D. BAGNALL et al. , JOURNAL OF FLUO LINE CHEMISTRY, 1979, 13, p. 123-140 GO LU, MD. , ANESTHESIOLOGY, 1953, 14, p. 466-472 (58) Fields surveyed (Int.Cl. ⁶ , DB name) C11D 7/28 C11D 7/26 C11D 7/50

Claims (3)

(57) [Claims] 1. A fluorinated solvent comprising at least one fluorine-containing ether selected from _{CF 3 CF 2 CF 2 -O-} CH 2 F and _{CF 3 CF 2 CH 2 -O-} CF 2 CF 3 or Ranaru group . 2. A solvent composition comprising an alcohol and the fluorinated solvent according to claim 1. 3. A method for removing dirt or moisture from the surface of an article using the fluorinated solvent according to claim 1 or the solvent composition according to claim 2.