JPH0481969B2 - - Google Patents
Info
- Publication number
- JPH0481969B2 JPH0481969B2 JP22300084A JP22300084A JPH0481969B2 JP H0481969 B2 JPH0481969 B2 JP H0481969B2 JP 22300084 A JP22300084 A JP 22300084A JP 22300084 A JP22300084 A JP 22300084A JP H0481969 B2 JPH0481969 B2 JP H0481969B2
- Authority
- JP
- Japan
- Prior art keywords
- freon
- solvent
- present
- solvents
- ppm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000002904 solvent Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- FRCHKSNAZZFGCA-UHFFFAOYSA-N 1,1-dichloro-1-fluoroethane Chemical compound CC(F)(Cl)Cl FRCHKSNAZZFGCA-UHFFFAOYSA-N 0.000 claims description 2
- NDKGUMMLYBINOC-UHFFFAOYSA-N 1,2-dichloro-1-fluoroethane Chemical compound FC(Cl)CCl NDKGUMMLYBINOC-UHFFFAOYSA-N 0.000 description 17
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 239000012046 mixed solvent Substances 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- -1 ethyl acetate Chemical class 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 238000013112 stability test Methods 0.000 description 3
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 2
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 2
- 239000012964 benzotriazole Substances 0.000 description 2
- 239000012459 cleaning agent Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 150000008280 chlorinated hydrocarbons Chemical class 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005237 degreasing agent Methods 0.000 description 1
- 239000013527 degreasing agent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- LYGJENNIWJXYER-UHFFFAOYSA-N nitromethane Chemical compound C[N+]([O-])=O LYGJENNIWJXYER-UHFFFAOYSA-N 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
- C23G5/02—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents
- C23G5/028—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing halogenated hydrocarbons
- C23G5/02809—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing halogenated hydrocarbons containing chlorine and fluorine
- C23G5/02825—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing halogenated hydrocarbons containing chlorine and fluorine containing hydrogen
- C23G5/02829—Ethanes
- C23G5/02832—C2H3Cl2F
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/26—Cleaning or polishing of the conductive pattern
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Detergent Compositions (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
（産業上の利用分野）
本発明は、1.2−ジクロロフルオロ系溶剤の安
定化方法に関する。更に詳しくは1.2−ジクロロ
フルオロエタン（以下、フロン141と称する）お
よび1.2−ジクロロフルオロエタンを主成分とす
る混合溶剤（以下、フロン141混合溶剤と称する）
を意味するフロン141系溶剤の分解を抑止し、金
属材料の腐触を防止する方法に関する。
本発明のフロン141混合溶剤とはフロン141の溶
解性等を改善する目的で、フロン141の溶剤特性
を著しく変えない範囲において、種々の有機溶剤
をフロン141に混合したものである。このような
目的で混合できる有機溶剤は、メタノール、エタ
ノール、イソプロパノール、イソプタノール、
tert−ブタノール等のアルコール類、アセトン、
メチルエチルケトン等のケトン類、酢酸メチル、
酢酸エチル等のエステル類、塩化メチレン、メチ
ルクロロホルム等の塩素化炭化水素等である。
フロン141を主成分とするフロン141系溶剤は一
般的には不燃性で低毒性であり、またすぐれた溶
解能を有するため、種々の物品の洗浄剤として有
用である。たとえば、シリコーンウエハーやシリ
コンチツプ等の半導体材料、ICやSI等の半導体
類、プリント配線基板、リレースイツチ、マイク
ロモーター等の電子・電気機器類や時計、カメ
ラ、マイクロペアリング、レンズ等の精密機器類
の脱脂洗浄剤として使用できる。
（従来の技術）
フロン141は、弗素原子もしくは水素原子を含
まない従来の塩素系溶剤や弗素系溶剤とは異なつ
た分解挙動を示し、その安定化には未だ充分確実
な方法が知られていない。
（発明が解決しようとする問題点）
フロン141はメチルクロロホルム、テトラタロ
ルエチレン、トリクロルエチレン等の塩素系溶剤
に較べて安定性が高く、一般の使用条件下では安
定化は必ずしも必要ではないが、それでも水分や
アルコール類が共存する場合とか、電子機器や精
密機器類の洗浄のように品質要求水準が高度で厳
密である場合には、その安定性が問題となること
がある。特に電子・電気機器や精密機器類におい
て多用されている銅、アルミニウム、亜鉛等の金
属材料の存在下での安定性は重要である。もしこ
れらの金属の存在下で溶剤の劣化が起るときは、
同時にこれらの金属の腐触をひき起すことにな
り、被洗物の品質に悪影響を与える。
（問題点を解決するための手段）
本発明者は、フロン141系溶剤の安定性を改善
しようとして種々検討を重ねた結果、その方法を
見出し本発明に到達した。
すなわち、本発明はフロン141系溶剤にベンゾ
トリアゾールを添加することを特徴とするフロン
141系溶剤の安定化方法である。
本発明において添加するベンゾトリアゾールの
量は通常、溶剤に対し５〜1000重量ppmである
が、特にこの範囲に限定されるものでない。一般
的について添加量が５重量ppmより少ないときは
本発明の効果が余り明瞭でなくなり、添加量が
1000重量ppmより大きくなるときは液が着色した
り、不溶物となつて析出したりする等、該溶剤の
特性を損なうことが起り得策でない。また本発明
の作用効果を阻害しない限りにおいて、ニトロメ
タン等の他の安定剤と併用することは支障ない。
（発明の効果）
本発明によつて安定化されたフロン141系溶剤
は、亜鉛、銅、アルミニウム、鋼に対する変色や
腐触が抑制でき、またこれら金属材料の存在下に
おいても変質することが少ないので、各分野にお
ける洗浄剤として幅広く使用することができる。
（実施例）
以下に本発明を実施例によつて説明する。
なお、実施例における安定性試験は次の方法に
従つて行なわれた。
安定性試験：試料50mlを容量100mlのガラスび
んに入れ、これに充分よく磨いた亜鉛、銅、アル
ミニウム、軟鋼の各試験片（大きさ80×13×２
mm）を、液中に漬かるように入れて密閉し、60℃
で４日間、更に引き続き室温で３日間放置する。
金属片の腐触状態を観察し、溶剤の劣化は溶剤中
の水素イオンを等容の水で抽出して、そのPHで表
わした。
実施例 １
水分540重量ppmを含むフロン141およびこれに
表−１に示す各種溶剤を混合したフロン141混合
溶剤を試料とし、金属試験片として亜鉛を用いて
安定性試験を行なつた。その結果を表−１に示
す。
実施例 ２
金属試験片として銅を用いる以外は実施例１と
同じ試験を行なつた。その結果を表−２に示す。
実施例 ３
金属試験片として軟鋼を用いる以外は実施例１
と同じ試験を行なつた。その結果を表−３に示
す。
(Industrial Application Field) The present invention relates to a method for stabilizing 1,2-dichlorofluoro solvents. More specifically, 1,2-dichlorofluoroethane (hereinafter referred to as Freon 141) and a mixed solvent mainly composed of 1,2-dichlorofluoroethane (hereinafter referred to as Freon 141 mixed solvent)
This invention relates to a method for inhibiting the decomposition of Freon 141-based solvents and preventing corrosion of metal materials. The Freon 141 mixed solvent of the present invention is a mixture of various organic solvents with Freon 141 for the purpose of improving the solubility of Freon 141, within a range that does not significantly change the solvent properties of Freon 141. Organic solvents that can be mixed for this purpose include methanol, ethanol, isopropanol, isoptanol,
Alcohols such as tert-butanol, acetone,
Ketones such as methyl ethyl ketone, methyl acetate,
These include esters such as ethyl acetate, and chlorinated hydrocarbons such as methylene chloride and methyl chloroform. Freon 141-based solvents containing Freon 141 as a main component are generally nonflammable, have low toxicity, and have excellent dissolving ability, so they are useful as cleaning agents for various articles. For example, semiconductor materials such as silicone wafers and silicon chips, semiconductors such as IC and SI, electronic and electrical equipment such as printed wiring boards, relay switches, and micro motors, and precision equipment such as watches, cameras, micro pairings, and lenses. It can be used as a degreasing agent. (Prior art) Freon 141 exhibits a decomposition behavior that is different from conventional chlorine-based solvents and fluorine-based solvents that do not contain fluorine or hydrogen atoms, and there is still no known sufficiently reliable method for its stabilization. . (Problems to be solved by the invention) Freon 141 is more stable than chlorinated solvents such as methylchloroform, tetratalolethylene, and trichlorethylene, and stabilization is not necessarily necessary under general usage conditions. Even so, stability may become a problem when moisture or alcohol coexists, or when quality requirements are high and strict, such as when cleaning electronic equipment or precision equipment. Stability is especially important in the presence of metal materials such as copper, aluminum, and zinc, which are frequently used in electronic/electrical equipment and precision instruments. If solvent degradation occurs in the presence of these metals,
At the same time, it causes corrosion of these metals, which adversely affects the quality of the items to be washed. (Means for Solving the Problems) The present inventor has conducted various studies in an attempt to improve the stability of Freon 141-based solvents, and as a result, has found a method and arrived at the present invention. That is, the present invention provides a fluorocarbon characterized by adding benzotriazole to a fluorocarbon 141 solvent.
This is a method for stabilizing 141 series solvents. The amount of benzotriazole added in the present invention is usually 5 to 1000 ppm by weight based on the solvent, but is not particularly limited to this range. In general, when the amount added is less than 5 ppm by weight, the effect of the present invention is not so clear, and the amount added is less than 5 ppm by weight.
If it exceeds 1000 ppm by weight, it is not a good idea because the properties of the solvent may be impaired, such as coloring the liquid or precipitation as insoluble matter. Further, as long as the effects of the present invention are not inhibited, it may be used in combination with other stabilizers such as nitromethane. (Effects of the invention) The CFC-141 solvent stabilized by the present invention can suppress discoloration and corrosion of zinc, copper, aluminum, and steel, and is less likely to change in quality even in the presence of these metal materials. Therefore, it can be widely used as a cleaning agent in various fields. (Example) The present invention will be explained below using examples. In addition, the stability test in Examples was conducted according to the following method. Stability test: Place 50 ml of the sample in a 100 ml glass bottle, and place thoroughly polished zinc, copper, aluminum, and mild steel test pieces (size 80 x 13 x 2
mm) submerged in the liquid, sealed, and heated to 60°C.
for 4 days, and then left at room temperature for 3 days.
The corrosion state of the metal pieces was observed, and the deterioration of the solvent was expressed by the pH value of the hydrogen ions extracted from the solvent with an equal volume of water. Example 1 A stability test was conducted using Freon 141 containing 540 ppm water by weight and a Freon 141 mixed solvent obtained by mixing Freon 141 with various solvents shown in Table 1 as samples, and using zinc as a metal test piece. The results are shown in Table-1. Example 2 The same test as in Example 1 was conducted except that copper was used as the metal test piece. The results are shown in Table-2. Example 3 Example 1 except that mild steel is used as the metal test piece
I conducted the same test. The results are shown in Table-3.
【表】【table】
【表】【table】
【表】 。【table】 .
Claims (1)
ゾトリアゾールを添加することを特徴とする1.2
−ジクロロフルオロエタン系溶剤の安定化方法。1 1.2 characterized by adding penzotriazole to 1.2-dichlorofluoroethane solvent
- Method for stabilizing dichlorofluoroethane solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22300084A JPS61103843A (en) | 1984-10-25 | 1984-10-25 | Method of stabilizing solvent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22300084A JPS61103843A (en) | 1984-10-25 | 1984-10-25 | Method of stabilizing solvent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61103843A JPS61103843A (en) | 1986-05-22 |
| JPH0481969B2 true JPH0481969B2 (en) | 1992-12-25 |
Family
ID=16791246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22300084A Granted JPS61103843A (en) | 1984-10-25 | 1984-10-25 | Method of stabilizing solvent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61103843A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5688834A (en) * | 1991-08-30 | 1997-11-18 | Alliedsignal, Inc. | Catalysts which stabilize hydrohalocarbon blowing agent in polyurethane foam formulations |
| US5137929A (en) * | 1991-06-21 | 1992-08-11 | Allied-Signal Inc. | Additives which stabilize hydrohalocarbon blowing agent in polyurethane and polyisocyanurate foam formulations during polymerization |
| US5395859A (en) * | 1991-06-21 | 1995-03-07 | Alliedsignal Inc. | Catalysts which stabilize hydrohalocarbon blowing agent in polyisocyanurate foam formulations during polymerization |
| US8998384B2 (en) | 2011-03-31 | 2015-04-07 | Hewlett-Packard Development Company, L.P. | Circuits and methods using a non-gold corrosion inhibitor |
-
1984
- 1984-10-25 JP JP22300084A patent/JPS61103843A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61103843A (en) | 1986-05-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR0177279B1 (en) | Cleaning wafer substrates of metal contamination while maintaining wafer smoothness | |
| KR101674680B1 (en) | Manufacturing method of an array substrate for liquid crystal display | |
| EP3726565A1 (en) | Treatment liquid for semiconductor wafers, which contains hypochlorite ions | |
| EP0085701A4 (en) | Copper-containing articles with a corrosion inhibitor coating and methods of producing the coating. | |
| JP2002508439A (en) | Composition containing perfluorobutyl methyl ether and use of the composition | |
| KR100316987B1 (en) | Composition and method for stripping solder and tin from printed circuit boards | |
| JPH0481969B2 (en) | ||
| Walker | Corrosion inhibition of copper by tolyltriazole | |
| JPH03162497A (en) | Cleaning composition and method for cleaning and degreasing | |
| JPH0531530B2 (en) | ||
| KR20210125997A (en) | Treatment liquid for semiconductor wafers containing hypochlorite ions and a pH buffer | |
| US4086179A (en) | Improved cleaning solvent containing non-azeotropic mixtures of 1,1,1-trichloroethane and n-propanol | |
| US5114609A (en) | Cleaning compositions | |
| US4046820A (en) | Stabilization of 1,1,1-trichloroethane | |
| JPWO2019167971A1 (en) | Alumina protective liquid, a protective method, and a method for manufacturing a semiconductor substrate having an alumina layer using the same. | |
| EP0421790A2 (en) | Stabilized azeotrope-like compositions of 1,1-dichloro-2,2,2-trifluoroethane and 1,1-dichloro-1-fluoroethane | |
| US5693599A (en) | Flux washing agent | |
| US3945932A (en) | Novel trichloromonofluoromethane-alcohol azeotropes | |
| KR101805188B1 (en) | Cleaning composition for removing polyimide | |
| JPS5851996B2 (en) | Stabilization method for 1,1,2↓-trichloro↓-1,2,2↓-trifluoroethane solvent | |
| JPS6250398A (en) | Method for stabilizing solvent | |
| JPS5851995B2 (en) | Stabilization method for 1,1,2↓-trichloro↓-1,2,2↓-trifluoroethane solvent | |
| JPH05155792A (en) | Method for stabilizing azeotrope-like composition | |
| JPH0160457B2 (en) | ||
| KR101059487B1 (en) | Tin whisker inhibitor and manufacturing method of whisker-resistant tin plating material using the same |