JP4353577B2 - Cleaning liquid composition - Google Patents

Cleaning liquid composition Download PDF

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Publication number
JP4353577B2
JP4353577B2 JP11188299A JP11188299A JP4353577B2 JP 4353577 B2 JP4353577 B2 JP 4353577B2 JP 11188299 A JP11188299 A JP 11188299A JP 11188299 A JP11188299 A JP 11188299A JP 4353577 B2 JP4353577 B2 JP 4353577B2
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Japan
Prior art keywords
cleaning
cleaning liquid
liquid composition
curing
epoxy resin
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JP11188299A
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Japanese (ja)
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JP2000303100A (en
Inventor
知巳 岡田
景太 松下
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Eneos Corp
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Japan Energy Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、洗浄液組成物に関し、更に詳しくは、ポリウレタン樹脂、エポキシ樹脂等の硬化性樹脂、それらの樹脂が硬化する途中の原料体などが付着した注型器、容器等の硬質物質を洗浄する際に用いる洗浄液組成物に関する。
【0002】
【従来の技術】
従来、エポキシ樹脂及びポリウレタン樹脂は、原料成分を配合することにより硬化し、成形される。この際、各成分の配合あるいは配合後の貯蔵中に装置類に付着した硬化前のエポキシ樹脂あるいはポリウレタン樹脂の洗浄除去においては、フロン系溶剤、あるいはトリクロロエタン等の塩素系溶剤が使用されている。しかし、これらの溶剤はオゾン層を破壊する物質として、1995年末にその製造が禁止され、更に塩素系溶剤は毒性が強く、水質汚染を防止するため、その法規制も厳しい。
【0003】
また、このような洗浄除去には、炭化水素等の石油系溶剤、テルペン系溶剤、アルコール系溶剤、アセトン等も使用し得るが、これらの溶剤は無機イオン類や極性化合物に対する洗浄力に乏しく、また、その引火点が比較的低く、かつ毒性を有する等の安全上の問題がある。また、界面活性剤や無機アルカリを添加した水系洗浄剤、リン酸塩類等の水溶液系洗浄剤の利用も検討されるが、洗浄力が乏しく、かつ排水処理設備に大きなスペースを必要とし経済性の面から好ましくない。
【0004】
このため、硬化前のエポキシ樹脂あるいはポリウレタン樹脂の洗浄除去、特にポリウレタン樹脂の被膜の剥離に十分な洗浄力を要求する場合、毒性の強い塩化メチレンを使用せざるを得ないという問題がある。
【0005】
【発明が解決しようとする課題】
本発明は、エポキシ樹脂、ポリウレタン樹脂等の硬化樹脂が付着した被洗浄物、特にポリウレタン樹脂の付着した被洗浄物に対して良好な洗浄効果を有すると共に、優れた安全性を有し、かつ毒性が少ない洗浄液組成物を提供するものである。
【0006】
【課題を解決するための手段】
本発明は、硬化前ウレタン樹脂又は硬化前エポキシ樹脂の付着した注型器および容器を洗浄する洗浄液組成物であり、炭素数8〜14の芳香族化合物を9〜50重量%と、N−メチル−2−ピロリドンを10〜50重量%含むものである。また、本発明による洗浄方法は、硬化前ウレタン樹脂又は硬化前エポキシ樹脂の付着した注型器および容器を、炭素数8〜14の芳香族化合物を9〜50重量%と、N−メチル−2−ピロリドンを10〜50重量%含む洗浄液組成物と接触させるものである。
【0007】
本発明の洗浄液組成物は、広範囲な硬化性樹脂又はその原料体の付着した硬質物質の被洗浄物に対して良好な洗浄効果を有し、とりわけ硬化前ウレタン樹脂、硬化前エポキシ樹脂の洗浄に適している。エラストマー用ウレタン樹脂は、短時間かつ低温で硬化するため注型器、容器等に硬化被膜を形成しやすいが、本発明の洗浄液組成物は、該硬化被膜の剥離に著しい効果を有する。また、引火性が低く、低臭で毒性も少なく、安全性の面からも非常に優れている。また、蒸留による再利用が可能であり、蒸発による損失も少なく経済性の面からも優れている。
【0008】
【発明の実施の形態】
本発明の洗浄液組成物において、炭素数8〜14の芳香族化合物は、単環又は多環芳香族化合物、これらのアルキル置換化合物などを含むものであり、例えば、iso−プロピルベンゼン、n−プロピルベンゼン、1−エチル−2−メチルベンゼン、1−エチル−3−メチルベンゼン、1−エチル−4−メチルベンゼン、1,2,3−トリメチルベンゼン、1,2,4−トリメチルベンゼン、1,3,5−トリメチルベンゼン、インダン、iso−ブチルベンゼン、sec−ブチルベンゼン、1,3−ジエチルベンゼン、1−メチル−3−n−プロピルベンゼン、1,4−ジエチルベンゼン、1,3−ジエチル−5−エチルベンゼン、1,2−ジエチルベンゼン、1−メチル−2−n−プロピルベンゼン、1,4−ジメチル−2−エチルベンゼン、1,3−ジメチル−2−エチルベンゼン、1,2−ジメチル−4−エチルベンゼン、1,2−ジメチル−3−エチルベンゼン、1,2,4,5−テトラメチルベンゼン、1,2,3,5−テトラメチルベンゼン、メチルインダン、エチルインダン、テトラリン、メチルナフタレン、ジメチルナフタレンなどを挙げることができる。また、これらを単独で用いても必要に応じて2種以上を混合して用いても差し支えない。また、この芳香族化合物を含有する石油留分などを用いることもできる
【0009】
N−メチル−2−ピロリドン(以下、NMPともいう)の含有量が5重量%未満であるとウレタンなどの硬化性樹脂の除去が難しく、50重量%を超えて含有されていても洗浄性が格段に良くなることはなく、むしろ、NMPの皮膚刺激性等の人体への有害性が増すので好ましくない。また、本発明の範囲においては、当該洗浄液組成物は危険物第四類第二、第三石油類に属するため安全性が高い。
【0010】
本発明の洗浄液組成物には、本発明の目的を損なわない範囲で、界面活性剤、酸化防止剤、紫外線吸収剤、防錆剤等の慣用の添加剤を含めることができる。ここで任意物質としての界面活性剤は、硬化前エポキシ樹脂、ポリウレタン樹脂等の表面に付着した油類、ポリマー、スケール等への浸透性や溶解速度の向上のために使用される。該界面活性剤としては非イオン性界面活性剤が好ましく、例えば高級アルコールエチレンオキサイド付加物、アルキルフェノールエチレンオキサイド付加物、脂肪酸エチレンオキサイド付加物、高級アルキルアミンエチレンオキサイド付加物、ソルビトール及びソルビタンの脂肪酸エステル、ショ糖脂肪酸エステル、シリコン系、フッ素系等いずれのものも使用できる。
【0011】
また、他の任意物質である紫外線吸収剤及び酸化防止剤は、洗浄液の長期保存等における安定性の向上に役立ち、紫外線吸収剤としては例えばベンゾトリアゾール系、ベンゾフェノン系、ヒンダードアミン系等を使用でき、酸化防止剤としては例えばフェノール系、アミン系、硫黄系、リン系等、本発明の洗浄液組成物に溶解するものはいずれも使用できる。フェノール系酸化防止剤を、100〜1000ppm添加することが特に好ましい。
【0012】
本発明の洗浄方法において、洗浄液組成物と接触させる方法自体は特に制限はなく、公知のいずれの方法も使用できる。例えば、洗浄液組成物を含浸したスポンジ等による拭き取り、洗浄液組成物への浸漬及び/又はスプレー等により実施することが好ましい。浸漬による洗浄においては、洗浄効果を高めるために、同時に攪拌、揺動、超音波又はエアバブリング等を組み合わせることが更に好ましい。この場合、超音波の使用条件は、例えば発振周波数20〜100kHz、発振出力10〜200W/lが好ましい。エアバブリングでは、微細な気泡を、好ましくはガス:液体の体積比1:1乃至5:1程度で通気することにより、洗浄液組成物に不溶性の汚れを気泡と共に上昇させ、不溶性の汚れをも分離することができる。スプレーによる洗浄において、その圧力は、例えば0.5〜10kg/cm2 Gが好ましい。いずれの場合も洗浄時間は、好ましくは15秒間〜2時間、特に好ましくは30秒間〜20分間である。上記範囲未満では洗浄が不十分で、付着した汚れを十分に除去し得ず、一方、上記範囲を超えても洗浄効果は格別向上しない。洗浄温度は、好ましくは20〜120℃である。上記洗浄において、より高温で処理することにより洗浄効果を著しく上昇させることができる。上記範囲未満では、洗浄が不十分となり易い。
【0013】
本発明の洗浄液組成物は、ポリウレタン樹脂及びポリウレタン樹脂組成物を取り扱う産業装置、例えば混合機、成形機、貯蔵タンク、加工機等の洗浄、あるいは硬化前エポキシ樹脂及び硬化前エポキシ樹脂組成物を取り扱う産業装置、例えば貯蔵タンク、混合槽、注型機等の洗浄に好ましく使用し得る。また、他の硬化性樹脂に関しても同様に使用し得る。
【0014】
本発明の洗浄液組成物は、上記の各硬化前樹脂、特に硬化前樹脂組成物に対して硬化促進作用がない。また、各樹脂の物性に悪影響を及ぼすこともない。従って、洗浄後に本発明の洗浄液組成物が、例えばタンク内等に多少残存しても、再度上記の各硬化前樹脂、特に硬化前樹脂組成物の貯蔵中に、硬化のおそれがなく、また、硬化工程で早すぎる硬化が起きない。
【0015】
ポリウレタン樹脂としては、例えばトリレンジイソシアナート(TDI)、ジフェニルメタンジイソシアナート(MDI)等のジイソシアナート及びポリプロピレングリコール等のポリオール類との反応物が挙げられる。ポリウレタン樹脂組成物としては、上記ポリウレタン樹脂に硬化剤、硬化促進剤を加え、更に乳化剤、発泡剤、安定剤、可塑剤、難燃剤、帯電防止剤、着色剤、褶動性改良剤、耐衝撃性改良剤等の慣用の添加剤を配合したもの等が挙げられる。
【0016】
エポキシ樹脂としては、例えばビスフェノールA型エポキシ樹脂、ビスフェノールF型エポキシ樹脂、ビスフェノールAD型エポキシ樹脂、多価アルコールのポリグリシジルエーテル、多塩基酸のポリグリシジルエステル、3,(3,4‐エポキシシクロヘキサン)カルボキシレート、ビニルシクロヘキセンジエポキサイド、クレゾールノボラック型エポキシ樹脂、ヒダントイン環を有するエポキシ樹脂等が挙げられる。また、エポキシ樹脂組成物としては、例えば上記エポキシ樹脂にエポキシ樹脂硬化剤、硬化促進剤を加え、更に充填剤、安定剤、可塑剤、滑剤、難燃剤、難燃助剤、帯電防止剤、着色剤、帯電性付与剤、褶動性改良剤、耐衝撃性改良剤等の慣用の添加剤を配合したもの等が挙げられる。ここで、エポキシ樹脂硬化剤としては通常使用されているものであればいずれでもよく、多価フェノール類、芳香族系多塩基酸類、芳香族ポリアミン類等が挙げられ、例えばフェノールノボラック、ビフェノール型ノボラック、ビスフェノールA型ノボラック等のノボラック、無水フタル酸、無水ピロメリット酸、無水ベンゾフェノンテトラカルボン酸等の酸無水物あるいはジアミノジフェニルメタン、ジアミノジフェニルスルホン、メタフェニレンジアミン、ヘキサメチレンテトラミン等のアミン類等が挙げられる。また、硬化促進剤としては、例えば第三級アミン類や有機リン化合物等が挙げられる。
【0017】
【実施例】
以下、本発明を実施例、比較例により更に詳細に説明するが、本発明はこれら実施例により限定されるものではない。
【0018】
表1にその組成を示す洗浄液を用い、攪拌を組合わせた浸漬による硬化前ポリウレタン樹脂組成物Aの洗浄テストを実施した。ポリウレタン樹脂組成物Aは東京エアゾール化学のスーパーウレタンフォームS−20を用いた。該ポリウレタン樹脂は室温120秒で表面が硬化する。
【0019】
【表1】

Figure 0004353577
【0020】
スーパーウレタンフォームS−20を5cm×5cmの200メッシュステンレス製金網に塗布した後、室温にて45秒硬化させた。次に、200ミリリットルのサンプル瓶に、表1に示す配合割合の各洗浄液組成物100グラム及び回転子を入れ、樹脂組成物が付着した金網を該洗浄液組成物に浸して、マグネチックスターラにて室温攪拌することにより洗浄を行った。洗浄後、金網を取出してウレタンフォームが除去できているかどうかを目視判定した。判定は、ウレタン残留物が無くきれいに洗浄できた場合を○により、ウレタン樹脂が残存した場合を×により示した。
【0021】
【発明の効果】
本発明は、広範囲な硬化性樹脂又はその原料体の付着した硬質物質の被洗浄物に対して良好な洗浄効果を有し、特にポリウレタン樹脂の付着した被洗浄物に対して良好な洗浄効果を有すると共に、優れた安全性を有し、かつ毒性が少なく、更には洗浄後の乾燥が容易な洗浄液組成物を提供する。該洗浄液組成物は、従来の洗浄剤の代替として工業的に極めて有用である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cleaning liquid composition. More specifically, the present invention cleans hard substances such as casters and containers to which curable resins such as polyurethane resins and epoxy resins, and raw material bodies in the middle of curing these resins adhere. The present invention relates to a cleaning liquid composition used at the time.
[0002]
[Prior art]
Conventionally, an epoxy resin and a polyurethane resin are cured and molded by blending raw material components. At this time, a fluorocarbon solvent or a chlorinated solvent such as trichloroethane is used for washing and removing the epoxy resin or polyurethane resin before curing adhering to the apparatus during blending of each component or storage after blending. However, the production of these solvents is banned at the end of 1995 as a substance that destroys the ozone layer. Furthermore, chlorinated solvents are highly toxic and prevent water pollution.
[0003]
In addition, petroleum-based solvents such as hydrocarbons, terpene-based solvents, alcohol-based solvents, acetone and the like can be used for such cleaning removal, but these solvents have poor cleaning power against inorganic ions and polar compounds, Further, there are safety problems such as a relatively low flash point and toxicity. In addition, the use of aqueous detergents with surfactants and inorganic alkali added, and aqueous detergents such as phosphates is also considered, but the cleaning power is poor, and a large space is required for the wastewater treatment facility. It is not preferable from the aspect.
[0004]
For this reason, there is a problem that toxic methylene chloride has to be used when a sufficient detergency is required for washing and removing the epoxy resin or polyurethane resin before curing, particularly for peeling the polyurethane resin film.
[0005]
[Problems to be solved by the invention]
The present invention has a good cleaning effect on an object to be cleaned to which a cured resin such as an epoxy resin and a polyurethane resin adheres, particularly an object to be cleaned to which a polyurethane resin adheres, and has excellent safety and toxicity. Therefore, the present invention provides a cleaning liquid composition with a low content.
[0006]
[Means for Solving the Problems]
The present invention is a casting vessel and cleaning composition for cleaning a container deposited in the pre-curing urethane resin or cured before the epoxy resin, and an aromatic compound of 8-14 carbon atoms 9 0 to 50 wt%, N- It contains 10 to 50% by weight of methyl-2-pyrrolidone. The cleaning method according to the invention, a casting apparatus and a container deposited in the pre-curing urethane resin or cured before the epoxy resin, and an aromatic compound of 8-14 carbon atoms 9 0 to 50 wt%, N-methyl - It is brought into contact with a cleaning liquid composition containing 10 to 50% by weight of 2-pyrrolidone.
[0007]
The cleaning liquid composition of the present invention has a good cleaning effect for a wide range of curable resins or hard materials to which the raw material adheres, and particularly for cleaning pre-cured urethane resins and pre-cured epoxy resins. Is suitable. Since the urethane resin for elastomers is cured at a low temperature for a short time, it is easy to form a cured film on a caster, a container or the like. However, the cleaning liquid composition of the present invention has a remarkable effect on peeling of the cured film. In addition, it has low flammability, low odor, little toxicity, and is very excellent in terms of safety. In addition, it can be reused by distillation, and there is little loss due to evaporation, which is excellent in terms of economy.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In the cleaning liquid composition of the present invention, the aromatic compound having 8 to 14 carbon atoms includes a monocyclic or polycyclic aromatic compound, an alkyl-substituted compound thereof, and the like, for example, iso-propylbenzene, n-propyl. Benzene, 1-ethyl-2-methylbenzene, 1-ethyl-3-methylbenzene, 1-ethyl-4-methylbenzene, 1,2,3-trimethylbenzene, 1,2,4-trimethylbenzene, 1,3 , 5-trimethylbenzene, indane, iso-butylbenzene, sec-butylbenzene, 1,3-diethylbenzene, 1-methyl-3-n-propylbenzene, 1,4-diethylbenzene, 1,3-diethyl-5-ethylbenzene 1,2-diethylbenzene, 1-methyl-2-n-propylbenzene, 1,4-dimethyl-2-ethylben 1,3-dimethyl-2-ethylbenzene, 1,2-dimethyl-4-ethylbenzene, 1,2-dimethyl-3-ethylbenzene, 1,2,4,5-tetramethylbenzene, 1,2,3 5-tetramethyl benzene, methyl indane, Echiruindan, tetralin, methylnaphthalene, etc. dimethyl naphthalate emissions can be exemplified. Also, these may be used alone or as a mixture of two or more as required. Also, petroleum fractions containing this aromatic compound can be used .
[0009]
When the content of N-methyl-2-pyrrolidone (hereinafter also referred to as NMP) is less than 5% by weight, it is difficult to remove a curable resin such as urethane. It is not preferable because it does not improve much, but rather increases the harmfulness of NMP to the human body such as skin irritation. Further, within the scope of the present invention, the cleaning liquid composition is highly safe because it belongs to the hazardous material type 4, the second type, and the third type petroleum.
[0010]
The cleaning liquid composition of the present invention can contain conventional additives such as surfactants, antioxidants, ultraviolet absorbers, and rust preventives, as long as the object of the present invention is not impaired. Here, the surfactant as an optional substance is used for improving the permeability and dissolution rate to oils, polymers, scales and the like attached to the surface of the epoxy resin, polyurethane resin and the like before curing. The surfactant is preferably a nonionic surfactant, for example, higher alcohol ethylene oxide adduct, alkylphenol ethylene oxide adduct, fatty acid ethylene oxide adduct, higher alkylamine ethylene oxide adduct, sorbitol and fatty acid esters of sorbitan, Any of sucrose fatty acid ester, silicon type, fluorine type and the like can be used.
[0011]
In addition, ultraviolet absorbers and antioxidants which are other optional substances are useful for improving the stability in long-term storage of the cleaning liquid, and as the ultraviolet absorbers, for example, benzotriazole series, benzophenone series, hindered amine series, etc. can be used, As the antioxidant, any of those that dissolve in the cleaning liquid composition of the present invention, such as phenol, amine, sulfur, and phosphorus, can be used. It is particularly preferable to add 100 to 1000 ppm of a phenolic antioxidant.
[0012]
In the cleaning method of the present invention, the method itself for contacting with the cleaning liquid composition is not particularly limited, and any known method can be used. For example, it is preferable to carry out by wiping with a sponge impregnated with the cleaning liquid composition, immersion in the cleaning liquid composition and / or spraying. In cleaning by immersion, it is more preferable to combine stirring, shaking, ultrasonic waves, air bubbling, or the like at the same time in order to enhance the cleaning effect. In this case, the use conditions of the ultrasonic waves are preferably, for example, an oscillation frequency of 20 to 100 kHz and an oscillation output of 10 to 200 W / l. In air bubbling, fine bubbles are ventilated, preferably in a gas: liquid volume ratio of about 1: 1 to 5: 1, so that insoluble dirt rises with the bubbles, and insoluble dirt is also separated. can do. In the cleaning by spraying, the pressure is preferably 0.5 to 10 kg / cm 2 G, for example. In any case, the washing time is preferably 15 seconds to 2 hours, particularly preferably 30 seconds to 20 minutes. If it is less than the above range, the cleaning is insufficient, and the attached dirt cannot be sufficiently removed. The washing temperature is preferably 20 to 120 ° C. In the above cleaning, the cleaning effect can be remarkably increased by processing at a higher temperature. If it is less than the above range, cleaning tends to be insufficient.
[0013]
The cleaning liquid composition of the present invention handles polyurethane resins and industrial equipment that handles polyurethane resin compositions, such as mixers, molding machines, storage tanks, processing machines, etc., or pre-curing epoxy resins and pre-curing epoxy resin compositions. It can be preferably used for cleaning industrial equipment such as storage tanks, mixing tanks, casting machines and the like. Further, other curable resins can be used similarly.
[0014]
The cleaning liquid composition of the present invention has no curing accelerating action on each of the above-mentioned pre-curing resins, particularly the pre-curing resin composition. Further, the physical properties of each resin are not adversely affected. Therefore, even if the cleaning liquid composition of the present invention remains somewhat in the tank or the like after cleaning, there is no risk of curing during storage of each of the above-mentioned pre-curing resins, particularly the pre-curing resin composition, No premature curing occurs in the curing process.
[0015]
Examples of the polyurethane resin include reactants with diisocyanates such as tolylene diisocyanate (TDI) and diphenylmethane diisocyanate (MDI) and polyols such as polypropylene glycol. As the polyurethane resin composition, a curing agent and a curing accelerator are added to the above polyurethane resin, and further, an emulsifier, a foaming agent, a stabilizer, a plasticizer, a flame retardant, an antistatic agent, a colorant, a peristaltic modifier, and an impact resistance. And the like, which contain conventional additives such as property improvers.
[0016]
Examples of the epoxy resin include bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol AD type epoxy resin, polyglycidyl ether of polyhydric alcohol, polyglycidyl ester of polybasic acid, 3, (3,4-epoxycyclohexane) Examples thereof include a carboxylate, vinylcyclohexene diepoxide, a cresol novolac type epoxy resin, and an epoxy resin having a hydantoin ring. Moreover, as an epoxy resin composition, for example, an epoxy resin curing agent and a curing accelerator are added to the above epoxy resin, and further, a filler, a stabilizer, a plasticizer, a lubricant, a flame retardant, a flame retardant aid, an antistatic agent, and a coloring agent. And the like, which are blended with conventional additives such as an agent, a charge imparting agent, a peristaltic modifier, and an impact modifier. Here, any epoxy resin curing agent may be used as long as it is normally used, and examples thereof include polyhydric phenols, aromatic polybasic acids, aromatic polyamines, and the like, for example, phenol novolak, biphenol type novolak. , Novolaks such as bisphenol A type novolak, acid anhydrides such as phthalic anhydride, pyromellitic anhydride, benzophenone tetracarboxylic anhydride, or amines such as diaminodiphenylmethane, diaminodiphenylsulfone, metaphenylenediamine, hexamethylenetetramine, etc. It is done. Examples of the curing accelerator include tertiary amines and organic phosphorus compounds.
[0017]
【Example】
EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further in detail, this invention is not limited by these Examples.
[0018]
A cleaning test of the polyurethane resin composition A before curing by dipping combined with stirring was performed using a cleaning liquid having the composition shown in Table 1. As the polyurethane resin composition A, Tokyo Aerosol Chemical Super Urethane Foam S-20 was used. The surface of the polyurethane resin is cured at room temperature for 120 seconds.
[0019]
[Table 1]
Figure 0004353577
[0020]
Super urethane foam S-20 was applied to a 5 cm × 5 cm 200 mesh stainless steel wire mesh and then cured at room temperature for 45 seconds. Next, in a 200 ml sample bottle, 100 g of each cleaning liquid composition and the rotor having the blending ratios shown in Table 1 were put, and the wire mesh with the resin composition attached was immersed in the cleaning liquid composition, and then magnetically stirrer was used. Washing was performed by stirring at room temperature. After washing, the wire mesh was taken out and visually judged whether the urethane foam could be removed. Judgment is indicated by ◯ when there is no urethane residue and can be cleaned cleanly, and by × when the urethane resin remains.
[0021]
【The invention's effect】
The present invention has a good cleaning effect on an object to be cleaned of a hard material to which a wide range of curable resin or its raw material adheres, and particularly has an excellent cleaning effect on an object to be cleaned to which a polyurethane resin is attached. In addition, the present invention provides a cleaning liquid composition having excellent safety, low toxicity, and easy drying after cleaning. The cleaning liquid composition is extremely useful industrially as an alternative to conventional cleaning agents.

Claims (2)

炭素数8〜14の芳香族化合物を9〜50重量%と、N−メチル−2−ピロリドンを10〜50重量%含むことを特徴とし、硬化前のウレタン樹脂又は硬化前のエポキシ樹脂の付着した注型器および容器を洗浄する洗浄液組成物。An aromatic compound 9 0 50% by weight of 8 to 14 carbon atoms, N- methyl-2-pyrrolidone was characterized in that it comprises 10 to 50 wt%, adhesion of the uncured urethane resin or uncured epoxy resin A cleaning liquid composition for cleaning casters and containers. 硬化前ウレタン樹脂又は硬化前エポキシ樹脂の付着した注型器および容器を、炭素数8〜14の芳香族化合物を9〜50重量%と、N−メチル−2−ピロリドンを10〜50重量%含む洗浄液組成物と接触させることを特徴とする注型器および容器の洗浄方法。The casting device and container deposited before hardening urethane resin or cured before the epoxy resin, the aromatic compound of 8-14 carbon atoms 9 0 to 50 wt% and the N- methyl-2-pyrrolidone 10 to 50 wt% A casting apparatus and a container cleaning method, which are brought into contact with a cleaning liquid composition.
JP11188299A 1999-04-20 1999-04-20 Cleaning liquid composition Expired - Fee Related JP4353577B2 (en)

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