JPH0320230A - Methylene chloride composition - Google Patents
Methylene chloride compositionInfo
- Publication number
- JPH0320230A JPH0320230A JP15638089A JP15638089A JPH0320230A JP H0320230 A JPH0320230 A JP H0320230A JP 15638089 A JP15638089 A JP 15638089A JP 15638089 A JP15638089 A JP 15638089A JP H0320230 A JPH0320230 A JP H0320230A
- Authority
- JP
- Japan
- Prior art keywords
- methylene chloride
- composition
- propylene oxide
- amylene
- dioxane
- 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.)
- Pending
Links
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 239000000203 mixture Substances 0.000 title claims abstract description 20
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims abstract description 10
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims abstract description 9
- BKOOMYPCSUNDGP-UHFFFAOYSA-N 2-methylbut-2-ene Chemical group CC=C(C)C BKOOMYPCSUNDGP-UHFFFAOYSA-N 0.000 claims abstract description 8
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims abstract description 5
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 19
- 239000002184 metal Substances 0.000 abstract description 19
- 150000002739 metals Chemical class 0.000 abstract description 11
- 238000004140 cleaning Methods 0.000 abstract description 6
- 229910052782 aluminium Inorganic materials 0.000 abstract description 5
- 238000005979 thermal decomposition reaction Methods 0.000 abstract description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 229910052709 silver Inorganic materials 0.000 abstract description 3
- 229910052725 zinc Inorganic materials 0.000 abstract description 3
- 238000005238 degreasing Methods 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000002904 solvent Substances 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 238000013020 steam cleaning Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000012488 sample solution Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 150000008280 chlorinated hydrocarbons Chemical class 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000013112 stability test Methods 0.000 description 2
- 238000004448 titration Methods 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical group CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 description 1
- AJDIZQLSFPQPEY-UHFFFAOYSA-N 1,1,2-Trichlorotrifluoroethane Chemical compound FC(F)(Cl)C(F)(Cl)Cl AJDIZQLSFPQPEY-UHFFFAOYSA-N 0.000 description 1
- JHUUPUMBZGWODW-UHFFFAOYSA-N 3,6-dihydro-1,2-dioxine Chemical compound C1OOCC=C1 JHUUPUMBZGWODW-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000013527 degreasing agent Substances 0.000 description 1
- 238000005237 degreasing agent Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 125000005265 dialkylamine group Chemical group 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 239000004434 industrial solvent Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229950011008 tetrachloroethylene Drugs 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 238000009283 thermal hydrolysis Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Detergent Compositions (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は，金属の脱脂洗浄剤として有用なメチレンクロ
ライド組成物，とくには高温における熱安定性とアルミ
ニウム、亜鉛、鉄，銀，銅などの金属への腐食に対する
安定性とを高め、過熱蒸気洗浄に適合したメチレンクロ
ライド組成物に関するものである．
（従来の技術）
メチレンクロライドは強力な溶解力を備え，しかも毒性
が低く，公害発生の恐れがなく，また不燃性の溶剤であ
るため、これらの特性を生かして金属の脱脂洗浄用溶剤
をはじめ、一般工業用溶剤、ペイントリムーバー、塗料
用溶剤、プリント基板用溶剤等に広く使用されている．
（発明が解決しようとする課題〉
メチレンクロライドは１，１．１−トリクロロエタン，
トリクロルエチレン、テトラクロルエチレン等の塩素系
炭化水素溶剤に比べて熱安定性があり、金属に対しても
安定な溶剤であるが，他の塩素系炭化水素溶剤と同様、
高温によって熱分解を起こし、塩化水素を発生させる．
また，金属，とくにアルミニウムのように活性な金属の
地金と接触すると、溶剤が劣化することがある．さらに
，これを用いて金属の脱脂洗浄を行う際，薄物の被洗浄
物では熱容量が小さいために、屡々シミ、錆を発生させ
ることがある．
他方，これを フロン１１３と比較すると、熱安定性や
金属に対する安定性，さらには蒸気洗浄に際しての被洗
浄物の速乾性において劣っている．この問題に対処する
ため、本出願人は先に特開昭５７−５９８２１号公報に
おいて、メチレンクロライドに、プロピレンオキサイド
，１，４−ジオキサン、ジアルキルアミン、低級アルコ
ール、およびアミレンを，いずれも１重量％以下のごく
少量づつ組合せ使用することによって、安定性を向上さ
せたメチレンクロライド組成物を提案したが，瀾足でき
るものではなかった．
（課題を解決するための手段）
そこで、本発明者らは、この点を解決すべくさらに鋭意
研究を重ねた結果、メチレンクロライドに、その１．０
〜５．０重量％のプロピレンオキサイドを添加してなる
メチレンクロライド組或物にすると、上記の問題がすべ
て解決できることを見出し本発明を完成した．また、こ
の組成物に，その１重量％以下の、アミレン，ｌ，４−
ジオキサン．ｎ−ヘキサン、シクロヘキサンから選ばれ
る少なくとも１種を添加すると、より一層の満足が得ら
れることを見出した．
上記した成分からなる本発明のメチレンクロライド組成
物は，前記したメチレンクロライドが本来有する特徴を
そのまま維持しており、光、熱，水分，金属粉，溶解物
，研摩剤等の存在する過酷な条件下での酸化，熱分解，
加水分解等の劣化に対する安定性を顕著に改善すること
ができる。しかも，熱容量の小さい薄物の被洗浄物に対
しては、メチレンクロライドの沸点以上に加温された蒸
気を被洗浄物と接触させた後、乾燥させる洗浄方法であ
る、所謂加熱蒸気洗浄が実用化されるので、シミ，鮎の
発生を完全に防止できるという優れた効果を奏する．
これを，さらに詳細に説明すると、本発明によるメチレ
ンクロライド組成物において，メチレンクロライドに添
加されるプロピレンオキサイドはｌ．Ｏ〜５．０重量％
と少量でよく，また必要に応じて、この組或物に添加さ
れるアミレン，１，４−ジオキサン，ｎ−ヘキサン、シ
クロヘキサンから選ばれる少なくとも１種の化合物も１
重量％以下という極めて少量でよい．
これら各添加剤の配合割合が上記範囲の下限よりも少な
いときは充分な安定化効果が得られず，他方上記範囲の
上限を超える多量を加えても，それ以上の効果が得られ
ないだけでなく、却って経済的に不利となる．
本発明の効果を要約すれば，
１）メチレンクロライドに少量のプロピレンオキサイド
を添加することで、熱分解、加水分解による劣化を防止
し，安定化されたものとなる．２）メチレンクロライド
に、少量のプロピレンオキサイド，アミレンなどを添加
することで，金属による液の劣化を防ぐと共に、金属の
腐食を防ぐことができる．
３）また、この際添加するプロピレンオキサイド、アミ
レンなどの沸点がメチレンクロライドの沸点と近似して
いるため、この組成物を加熱蒸留しても液相，気相の比
率が著しく変動することなく，常に安定した比率が保た
れ，その結果として，液相，気相共に熱安定性、金属に
対する安定性が保持できる．
４）安定化されたメチレンクロライド組或物の実用化に
より，従来問題視されていた熱容量の小さい薄物の被洗
浄物に発生するシミ、錆も過熱蒸気洗浄法により解決で
きるほか、用途的にも従来の金属洗浄剤に止まらず、一
般工業用溶剤，ペイントリムーバー，ｎ料用溶剤、プリ
ント基板用溶剤等は勿論、ウレタン発泡助剤，空調機等
の冷媒等における，フロン１１．フロンｌ２、フロン１
１３等の代替え溶剤としても充分に期待できる．
（実施例）
以下、本発明の具体的態様を実施例および比較例により
説明するが，本発明はこれらの記載に限定されるもので
はない．
１）メチレンクロライド組成物の熱安定性および加水分
解安定性試験：
第ｌ表に示した成分配合からなる組成物試料液３００ｇ
と水（一次純粋）３０ｇとを容量ｉｎのオートクレープ
内に同時に仕込んで加熱昇温し，１３０℃，内圧１３．
０ｋｇ／ｃｄＧで１００分間維持した後、急冷して室温
に戻し，酸分（ＨＣＩ換算）の発生量を中和滴定により
測定した．その結果を第１表に併記した．２）メチレン
クロライドの対金属（アルミニウム）の安定性試験：
第２表に示した成分配合からなる組或物試料液２４０ｇ
の中に活性アルミニウム粉１０ｇを投入後，分解促進剤
として塩化アルミニウム０．０１ ｇを添加した．この
ときの試料液の酸分（ＨＣＩ換算）ｔと、これを常温で
７０時間静置した後の試料液の酸分（ＩＩｃＩ換算）Ｉ
ｉとを、中和滴定により測定し，得られた値を第２表に
併記した．
なお，各表中．ＭＣはメチレンクロライドを、Ｃ−ヘキ
サンはシクロヘキサンを，’ｌ’ＨＦはテトラヒドロフ
ランを，ＰＯはプロピレンオキサイドを、それぞれ表わ
し、実験Ｎｏ． １〜９と２４とが比較例，実験Ｎｏ．
１０〜２３と２５とが本発明である．（発明の効果）
本発明の組或物は、高温における熱分解を起こしにくく
、金属に対して安定なため，洗浄対象金属の拡大（アル
ミニウム、亜鉛、銀等）が期待できるほか．さらに加熱
蒸気洗浄法が適用可能なため、被洗浄物が洗浄槽より持
ち出す液損失を減少させると共に、熱容量の小さい薄物
の被洗浄物に対してシミ、錆の発生を完全に防止する。Detailed Description of the Invention (Industrial Field of Application) The present invention is directed to a methylene chloride composition useful as a degreasing agent for metals, particularly for its thermal stability at high temperatures and its properties for aluminum, zinc, iron, silver, copper, etc. This invention relates to a methylene chloride composition that has improved stability against metal corrosion and is suitable for superheated steam cleaning. (Prior technology) Methylene chloride has a strong dissolving power, is low in toxicity, poses no risk of causing pollution, and is a nonflammable solvent. Taking advantage of these properties, it can be used as a solvent for degreasing and cleaning metals. It is widely used as a general industrial solvent, paint remover, paint solvent, printed circuit board solvent, etc. (Problem to be solved by the invention) Methylene chloride is 1,1,1-trichloroethane,
It is more thermally stable than chlorinated hydrocarbon solvents such as trichlorethylene and tetrachlorethylene, and is also stable for metals, but like other chlorinated hydrocarbon solvents,
It causes thermal decomposition due to high temperature and generates hydrogen chloride.
Additionally, the solvent may deteriorate if it comes into contact with metals, especially active metals such as aluminum. Furthermore, when using this to degrease and clean metal, thin objects to be cleaned often have stains and rust due to their small heat capacity. On the other hand, when this is compared with Freon 113, it is inferior in thermal stability, stability against metals, and quick drying of objects to be cleaned during steam cleaning. In order to deal with this problem, the present applicant previously proposed in Japanese Patent Application Laid-Open No. 57-59821 that propylene oxide, 1,4-dioxane, dialkylamine, lower alcohol, and amylene were added to methylene chloride, all by weight. We proposed a methylene chloride composition with improved stability by using a combination of very small amounts of less than %, but this was not satisfactory. (Means for Solving the Problem) Therefore, as a result of further intensive research in order to solve this problem, the present inventors found that methylene chloride has a 1.0
The inventors discovered that all of the above problems could be solved by creating a methylene chloride composition containing ~5.0% by weight of propylene oxide, and completed the present invention. Further, in this composition, less than 1% by weight of amylene, l,4-
Dioxane. It has been found that further satisfaction can be obtained by adding at least one selected from n-hexane and cyclohexane. The methylene chloride composition of the present invention comprising the above-mentioned components maintains the original characteristics of methylene chloride described above, and can withstand harsh conditions in the presence of light, heat, moisture, metal powder, melts, abrasives, etc. oxidation, thermal decomposition,
Stability against deterioration such as hydrolysis can be significantly improved. Moreover, for thin objects to be cleaned with a small heat capacity, so-called heated steam cleaning, which is a cleaning method in which steam heated above the boiling point of methylene chloride is brought into contact with the object and then dried, has been put into practical use. This has the excellent effect of completely preventing the appearance of stains and ayu. To explain this in more detail, in the methylene chloride composition according to the present invention, propylene oxide added to methylene chloride is l. O~5.0% by weight
If necessary, at least one compound selected from amylene, 1,4-dioxane, n-hexane, and cyclohexane may be added to this composition.
A very small amount of less than % by weight is sufficient. If the blending ratio of each of these additives is less than the lower limit of the above range, a sufficient stabilizing effect will not be obtained; on the other hand, even if a large amount exceeding the upper limit of the above range is added, no further effect will be obtained. In fact, it is economically disadvantageous. To summarize the effects of the present invention, 1) By adding a small amount of propylene oxide to methylene chloride, deterioration due to thermal decomposition and hydrolysis is prevented and the product is stabilized. 2) By adding a small amount of propylene oxide, amylene, etc. to methylene chloride, it is possible to prevent the liquid from deteriorating due to metals and to prevent metal corrosion. 3) Also, since the boiling point of propylene oxide, amylene, etc. added at this time is close to the boiling point of methylene chloride, even if this composition is heated and distilled, the ratio of liquid phase and gas phase will not change significantly. A stable ratio is always maintained, and as a result, thermal stability and stability against metals can be maintained in both the liquid and gas phases. 4) With the practical application of stabilized methylene chloride composites, the stains and rust that occur on thin objects with small heat capacity, which had been considered a problem in the past, can be solved by superheated steam cleaning method, and it can also be used for various purposes. In addition to conventional metal cleaning agents, Freon 11. Freon l2, Freon 1
It can be fully expected to be used as an alternative solvent for 13 etc. (Examples) Specific aspects of the present invention will be explained below using Examples and Comparative Examples, but the present invention is not limited to these descriptions. 1) Thermal stability and hydrolytic stability test of methylene chloride composition: 300 g of composition sample solution consisting of the component combination shown in Table I
and 30 g of water (primary pure) were simultaneously charged into an autoclave with a capacity of 1.2 in. and heated to 130° C. and an internal pressure of 13.
After being maintained at 0 kg/cdG for 100 minutes, it was rapidly cooled and returned to room temperature, and the amount of acid content (HCI equivalent) generated was measured by neutralization titration. The results are also listed in Table 1. 2) Stability test of methylene chloride against metal (aluminum): 240 g of a sample solution consisting of the component composition shown in Table 2.
After putting 10 g of activated aluminum powder into the solution, 0.01 g of aluminum chloride was added as a decomposition accelerator. The acid content (HCI equivalent) of the sample solution at this time, and the acid content (IIcI equivalent) I of the sample solution after it was left to stand at room temperature for 70 hours.
i was measured by neutralization titration, and the obtained values are also listed in Table 2. In addition, in each table. MC represents methylene chloride, C-hexane represents cyclohexane, 'l'HF represents tetrahydrofuran, and PO represents propylene oxide. Experiment No. 1 to 9 and 24 are comparative examples, and experiment No.
Nos. 10 to 23 and 25 are the present invention. (Effects of the Invention) The assembly of the present invention is resistant to thermal decomposition at high temperatures and is stable against metals, so it can be expected to expand the range of metals that can be cleaned (aluminum, zinc, silver, etc.). Furthermore, since the heated steam cleaning method can be applied, the loss of liquid carried out by the object to be cleaned from the cleaning tank is reduced, and the generation of stains and rust can be completely prevented on thin objects to be cleaned, which have a small heat capacity.
Claims (1)
のプロピレンオキサイドを添加してなるメチレンクロラ
イド組成物。 ２、請求項１記載の組成物に、その１重量％以下の、ア
ミレン、１，４−ジオキサン、ｎ−ヘキサン、シクロヘ
キサンから選ばれる少なくとも１種を添加してなるメチ
レンクロライド組成物。[Claims] 1. 1.0 to 5.0% by weight of methylene chloride
A methylene chloride composition prepared by adding propylene oxide. 2. A methylene chloride composition obtained by adding 1% by weight or less of at least one selected from amylene, 1,4-dioxane, n-hexane, and cyclohexane to the composition according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15638089A JPH0320230A (en) | 1989-06-19 | 1989-06-19 | Methylene chloride composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15638089A JPH0320230A (en) | 1989-06-19 | 1989-06-19 | Methylene chloride composition |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30841491A Division JPH054932A (en) | 1991-10-28 | 1991-10-28 | Methylene chloride composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0320230A true JPH0320230A (en) | 1991-01-29 |
Family
ID=15626488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15638089A Pending JPH0320230A (en) | 1989-06-19 | 1989-06-19 | Methylene chloride composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0320230A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011256132A (en) * | 2010-06-09 | 2011-12-22 | Tokuyama Corp | Stabilized composition of chloropropane |
-
1989
- 1989-06-19 JP JP15638089A patent/JPH0320230A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011256132A (en) * | 2010-06-09 | 2011-12-22 | Tokuyama Corp | Stabilized composition of chloropropane |
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