JPH06346095A - Fluorine based cleansing solvent composition - Google Patents

Abstract

PURPOSE:To obtain the subject composition containing a specific fluorinated alcohol and a specified halogenated hydrocarbon, reduced in the change in the composition with time, useful as a safe and stable solvent, and excellent in the properties for dissolving and removing fluxes, oils, etc. CONSTITUTION:The objective composition comprises (A) a fluorinated alcohol selected from 1,1,1,3,3,3-hexafluoropropane-2-ol, 1,1,1,3,3,4,4,4-octafluorobutane-2-ol, 2-trifluoroethyl-1,1,1,3,3,3-hexafluoropropane-2-ol and 2-trifluoromethyl-1,1,1- trifluoropropane-2-ol, and (B) 1,1-dichloro-2,2,3,3,3-pentafluoropropane and/or 1,3-dichloro-1,2,2,3,3-pentafluoropropane preferably in amounts of 5-25wt.% and 75-95-wt.%, respectively.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a fluorine-based cleaning solvent composition having excellent properties as a cleaning solvent. More specifically, the present invention relates to a solvent composition used for cleaning fluxes used in semiconductor manufacturing or cleaning machine oil.

[0002]

2. Description of the Related Art Conventional cleaning solvents have been 1,1,2-
Trichloro-1,2,2-trifluoroethane (CFC
Chlorofluoroethane compounds such as -113) are widely used. These solvents are nonflammable, and further have such properties that they do not attack polymer materials such as plastics and have selective solubility of dissolving oils and fats, grease, wax and the like.

However, it has been pointed out that, when these chlorofluoroethane compounds are released into the atmosphere, they destroy the ozone layer in the stratosphere, and as a result, adversely affect the ecosystem on the earth. Regulations have been enforced.

[0004]

It is possible to decompose in the troposphere by leaving a hydrogen atom in the molecule instead of a chlorofluoroethane compound in which all the hydrogen in the molecule is replaced by chlorine and fluorine like CFC-113. As a result, measures to reduce the effects on ozone layer depletion and global warming by shortening the life in the atmosphere are being studied.

For example, 1,1-dichloro-2,2,3,
3,3-Pentafluoropropane (HCFC-225c
a) and hydrohalogenopropanes such as 1,3-dichloro-1,2,2,3,3-pentafluoropropane (HCFC-225cb), and several fluorinated alcohols (2 , 2,2-trifluoroethanol, 2,2,3,3-tetrafluoropropanol, 2,2,3,3,3-pentafluoropropanol) have been proposed as a solvent composition, etc. 3-17034, etc.).

[0006] However, these fluorinated alcohols are flammable by themselves, and since the difference in boiling point between HCFC-225ca and HCFC-225cb, both of which are base materials, is large, the composition change during reuse is large. However, the search for a high-performance alternative CFC solvent is still under consideration.

[0007]

Means for Solving the Problems As a result of repeated studies in view of the above-mentioned present conditions, the present inventors have found that the physical properties such as individual boiling points and surface tensions of conventional 2,2,2-trifluoroethanol, Fluorinated alcohols that are superior to 2,2,3,3-tetrafluoropropanol and 2,2,3,3,3-pentafluoropropanol, and HCFC-225ca (boiling point: 51.1) as a halogenated hydrocarbon. ℃)
And / or HCFC-225cb (boiling point: 56.1 ° C)
It has been found that a solvent having a high performance as a solvent and having a small influence on the global environment can be obtained by mixing the above. Thus, the present invention has been completed.

That is, the present invention is 1, 1, 1, 3,
3,3-hexafluoropropan-2-ol, 1,
1,1,3,3,4,4,4-octafluorobutane-
2-ol, 2-trifluoromethyl-1,1,1,
HCFC-225ca and at least one fluorinated alcohol selected from 3,3,3-hexafluoropropan-2-ol and 2-trifluoromethyl-1,1,1-trifluoropropan-2-ol HCF
The present invention relates to a fluorine-based cleaning solvent composition containing at least one of C-225cb.

The fluorinated alcohol used in the present invention is 1,1,1,3,3,3-hexafluoropropan-2-ol [CF ₃ CH (OH) CF ₃ ], 1,1,
1,3,3,4,4,4-octafluorobutane-2-
All [CF ₃ CH (OH) CF ₂ CF ₃ ], 2-trifluoromethyl-1,1,1,3,3,3-hexafluoropropan-2-ol [(CF ₃ ) ₃ COH], 2
- trifluoromethyl-1,1,1-trifluoro-2-ol _{[(CF 3) 2 (CH} 3) COH], they can be used as alone or mixture of two or more.

Table 1 shows typical physical properties of the fluorinated alcohol used in the present invention. For comparison, the corresponding physical property values of conventional alcohols are shown in Table 1. In all cases, the fluorinated alcohols of the present invention are superior, and when they are mixed with halogenated hydrocarbons, they have a low boiling point. The performance as a solvent can be enhanced without impairing the advantage of low surface tension.

[0011]

[Table 1]

Halogenated hydrocarbon H used in the present invention
CFC-225ca and HCFC-225cb may be used alone or in combination. The mixing ratio when used as a mixture of these two kinds is determined by the economic efficiency derived from the production method, but preferably HCFC-225ca is 40 to 60% by weight, HC
FC-225cb is 40 to 60% by weight.

Halogenated hydrocarbons HCFC-225ca and HC of the fluorine-based cleaning solvent composition used in the present invention
The mixing ratio of FC-225cb and fluorinated alcohol is H
CFC-225ca and HCFC-225cb alone or in a mixture thereof are 60 to 99% by weight, and fluorinated alcohol is 1 to 40% by weight, and particularly preferably,
HCFC-225ca and HCFC-225cb alone or in a mixture thereof are 75 to 95% by weight, and fluorinated alcohol is 5 to 25% by weight.

Specific uses of the composition of the present invention include:
Flux, grease, oil, wax, ink remover, paint solvent, extractant, glass, ceramics, plastic, rubber, metal products, especially IC parts, electrical equipment, precision machinery, optical lenses, etc. Etc. can be mentioned. As a cleaning method, hand-wiping, dipping, spraying, shaking, ultrasonic cleaning, steam cleaning or the like may be adopted.

[0015]

EXAMPLES The present invention will be described in more detail with reference to the following examples. [Examples 1 to 4] HCFC-225ca and HCFC-
225cb mixture, HCFC-225ca / cb (weight composition ratio HCFC-225ca / HCFC-225cb
= 1/1) and a solvent composition in which fluorinated alcohol was mixed at a ratio shown in Table 2 to perform a flux cleaning test.

Flux (Tamura F
-AL-4, manufactured by Tamura Seisakusho Co., Ltd.) was applied, baked in an electric furnace at 200 ° C. for 2 minutes, and then immersed in the composition of the present invention for 3 minutes. As a comparative example, the same test was performed using 2,2,3,3,3-pentafluoropropanol (Comparative Example 1) and CFC-113 alone (Comparative Example 2). The results are shown in Table 2.

[0017]

[Table 2]

[Examples 5 to 8] Machine oil washing tests were conducted using the compositions of the present invention. A test piece of SUS-304 (25 mm x 30 mm x 2 mm thick) was machine oil (CQ
-30 After immersion in Nippon Oil Co., Ltd., it was immersed in the composition of the present invention for 3 minutes. As a comparative example, 2,2
3,3,3-Pentafluoropropanol (Comparative Example 3)
And CFC-113 alone (Comparative Example 4) were used to perform the same test. The results are shown in Table 3.

[0019]

[Table 3]

[0020]

The fluorine-based cleaning solvent composition of the present invention uses a fluorinated alcohol which is incombustible and has a low boiling point as compared with conventional alcohols, and therefore, when mixed with HCFC-225ca and HCFC-225cb, the composition Has a small change over time, becomes a safe and stable solvent, and is excellent in the ability to dissolve and remove flux, oil, etc.
Since it can be used in the same manner as -113 or the like, it has an advantage that it does not require a significant change from the conventional technique.

Continuation of the front page (51) Int.Cl. ⁵ Identification number Reference number within the agency FI Technical display location C11D 7:28 7:30) (71) Applicant 000003300 Tosoh Co., Ltd. 4560 Kaiseicho, Shinnanyo, Yamaguchi Prefecture (71 ) Applicant 000002200 Central Glass Co., Ltd. 5253 Oki Ube, Ube-shi, Yamaguchi Prefecture (74) Attorney Aki Uchida (2 outside) Attorney Aki Uchida (72) Inventor Akira Sekiya 1-1-1 Higashi, Tsukuba-shi, Ibaraki (72) Inventor Mitsuru Takahashi Hongo 2-40-17 Hongo, Bunkyo-ku, Tokyo Hongo Wakai Building Institute for Global Environmental Industrial Technology (72) Inventor Yoshihiko Goto Hongo, Bunkyo-ku, Tokyo 2-40-17 Hongo Wakai Building, Research Institute for Global Environmental Industries (72) Inventor Atsushi Suga Hongo, Bunkyo-ku, Tokyo 2-40-17 Hongo Wakai Building Research Institute for Global Environmental Industries

Claims (2)

[Claims] 1. 1,1,1,3,3,3-hexafluoropropan-2-ol, 1,1,1,3,3,4
4,4-octafluorobutan-2-ol, 2-trifluoromethyl-1,1,1,3,3,3-hexafluoropropan-2-ol, and 2-trifluoromethyl-1,1,1 -At least one fluorinated alcohol selected from trifluoropropan-2-ol;
1,1-dichloro-2,2,3,3,3-pentafluoropropane and 1,3-dichloro-1,2,2,3,3
A fluorine-based cleaning solvent composition containing at least one of pentafluoropropane. 2. 1-40% by weight of fluorinated alcohol and 1,1-dichloro-2,2,3,3,3-pentafluoropropane and 1,3-dichloro-1,2,2,3,3.
At least one of pentafluoropropane 60-99
The fluorine-based cleaning solvent composition according to claim 1, which is composed by weight.