JP5570916B2 - Cleaning solvent composition and cleaning method - Google Patents
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Description
本発明は、洗浄用溶剤組成物に関し、更に詳しくは、硬化性樹脂又はその硬化物が付着した被洗浄物を洗浄するための溶剤組成物に関する。 The present invention relates to a cleaning solvent composition, and more particularly to a solvent composition for cleaning an object to be cleaned to which a curable resin or a cured product thereof is attached.
ウレタン樹脂及びエポキシ樹脂等の硬化性樹脂は、硬化性樹脂に硬化剤等の添加剤成分を配合することにより硬化し、成型される。具体的には、これらの硬化性樹脂は、金属部品と一体成型されたり、また電子部品の封止目的に一体的に成型されたりしている。これらの硬化性樹脂は、硬化性樹脂及び添加剤等の各成分の配合中に又は配合後の硬化性樹脂の貯蔵中に、あるいは硬化性樹脂の硬化後に、硬化性樹脂及びその硬化物が装置類に付着する。特に、ウレタン樹脂及びエポキシ樹脂は、一旦硬化すると非常に硬い皮膜等を形成するため、金属部品や電子部品に一体成型されると、これら金属部品や電子部品からウレタン樹脂やエポキシ樹脂を分離することはきわめて困難であった。このため、製品に不良が発生した場合、金属部品や電子部品をこれら硬化性樹脂から分離して再利用することはできなかった。 A curable resin such as a urethane resin and an epoxy resin is cured and molded by adding an additive component such as a curing agent to the curable resin. Specifically, these curable resins are integrally molded with metal parts or integrally molded for the purpose of sealing electronic parts. These curable resins are used in the curable resin and its cured product during compounding of each component such as curable resin and additives, during storage of the curable resin after compounding, or after curing of the curable resin. It adheres to the kind. In particular, since urethane resin and epoxy resin form a very hard film once cured, when urethane resin and epoxy resin are integrally molded with metal parts and electronic parts, urethane resin and epoxy resin must be separated from these metal parts and electronic parts. Was extremely difficult. For this reason, when a defect occurs in the product, the metal part and the electronic part cannot be separated from these curable resins and reused.
一方、特許文献１には、イソプロピルブロマイド及びノルマルプロピルブロマイドの少なくとも一方の溶剤と、ニトロアルカン類、エーテル類、エポキシド類及びアミン類からなる群から選ばれる少なくとも１種以上の溶剤からなる安定剤とを配合した溶剤第１成分と、Ｎ−メチル−２−ピロリドン（ＮＭＰ）とを含むプラスチック用溶剤組成物が、ポリエステル、アクリル樹脂、及びフェノキシ樹脂などのプラスチックに対して、高い溶解性能を示すことが開示されている。しかしながら、特許文献１に開示された溶剤第１成分とＮ−メチル−２−ピロリドンとを含む組成物では、ウレタン樹脂及びエポキシ樹脂のような硬化性樹脂及びその硬化物が付着した被洗浄物を洗浄した場合に、その洗浄効果は不十分であった。 On the other hand, Patent Document 1 includes a stabilizer comprising at least one solvent of isopropyl bromide and normal propyl bromide, and at least one solvent selected from the group consisting of nitroalkanes, ethers, epoxides and amines. The solvent composition for plastics containing the first solvent component and N-methyl-2-pyrrolidone (NMP) exhibits high dissolution performance for plastics such as polyester, acrylic resin, and phenoxy resin. Is disclosed. However, in the composition containing the first solvent component and N-methyl-2-pyrrolidone disclosed in Patent Document 1, a curable resin such as a urethane resin and an epoxy resin and an object to be cleaned to which the cured product is attached. When washed, the washing effect was insufficient.
このような事情から、洗浄除去が困難である、ウレタン樹脂及びエポキシ樹脂等の硬化性樹脂及びその硬化物が付着した被洗浄物に対して、イソプロピルブロマイド及びノルマルプロピルブロマイドの少なくとも一方の溶剤と、ニトロアルカン類、エーテル類、エポキシド類及びアミン類からなる群から選ばれる少なくとも１種以上の溶剤からなる安定剤とを配合した溶剤第１成分と、Ｎ−メチル−２−ピロリドン（ＮＭＰ）とを含む組成物と比較して優れた洗浄効果を有する溶剤組成物が望まれていた。本発明は、硬化性樹脂又はその硬化物が付着した被洗浄物に対して良好な洗浄効果を有する溶剤組成物を提供するものである。 From such circumstances, it is difficult to wash and remove, curable resin such as urethane resin and epoxy resin, and to-be-washed object to which the cured product is attached, at least one solvent of isopropyl bromide and normal propyl bromide, A solvent first component containing a stabilizer comprising at least one solvent selected from the group consisting of nitroalkanes, ethers, epoxides and amines, and N-methyl-2-pyrrolidone (NMP). There has been a demand for a solvent composition having an excellent cleaning effect as compared with the composition containing it. This invention provides the solvent composition which has a favorable cleaning effect with respect to the to-be-cleaned object to which curable resin or its hardened | cured material adhered.
本発明者らは、前記の課題を解決するべく鋭意研究を重ねた結果、（ａ）ノルマルプロピルブロマイド（ＮＰＢ）を１５重量％〜５５重量％、（ｂ）Ｎ−メチル−２−ピロリドン（ＮＭＰ）を４０重量％〜８０重量％、及び（ｃ）添加剤を０．５重量％〜５重量％からなることを特徴とする溶剤組成物が、特許文献１に開示されたイソプロピルブロマイド及びノルマルプロピルブロマイドの少なくとも一方の溶剤と、ニトロアルカン類、エーテル類、エポキシド類及びアミン類からなる群から選ばれる少なくとも１種以上の溶剤からなる安定剤とを配合した溶剤第１成分とＮ−メチル−２−ピロリドンとを含む組成物と比較して、ウレタン樹脂及びエポキシ樹脂等の硬化性樹脂及びその硬化物が付着した被洗浄物に対して、優れた洗浄効果を有することを見出し本発明に至った。 As a result of intensive studies to solve the above problems, the present inventors have found that (a) normal propyl bromide (NPB) is 15% to 55% by weight, and (b) N-methyl-2-pyrrolidone (NMP). ) And 40% by weight to 80% by weight, and (c) 0.5% to 5% by weight of the additive, the solvent composition disclosed in Patent Document 1 is isopropyl bromide and normal propyl. First solvent component and N-methyl-2 containing at least one solvent of bromide and a stabilizer comprising at least one solvent selected from the group consisting of nitroalkanes, ethers, epoxides and amines -Compared with a composition containing pyrrolidone, it has an excellent cleaning effect on curable resins such as urethane resins and epoxy resins and the objects to be cleaned. It has led to heading the present invention to be.
すなわち、本発明は、（ａ）ノルマルプロピルブロマイドを１５重量％〜５５重量％、（ｂ）Ｎ−メチル−２−ピロリドンを４０重量％〜８０重量％、及び（ｃ）添加剤を０．５〜５重量％からなることを特徴とする、硬化性樹脂又はその硬化物が付着した被洗浄物を洗浄するための溶剤組成物に関する。 That is, the present invention comprises (a) normal propyl bromide in an amount of 15 wt% to 55 wt%, (b) N-methyl-2-pyrrolidone in an amount of 40 wt% to 80 wt%, and (c) an additive in an amount of 0.5 wt%. It is related with the solvent composition for wash | cleaning the to-be-washed | cleaned material to which curable resin or its hardened | cured material adhered, which consists of -5 weight%.
本発明は、前記硬化性樹脂がウレタン樹脂である、前記に記載の溶剤組成物に関する。 The present invention relates to the solvent composition as described above, wherein the curable resin is a urethane resin.
本発明は、前記硬化性樹脂がエポキシ樹脂である、前記に記載の溶剤組成物に関する。 The present invention relates to the solvent composition as described above, wherein the curable resin is an epoxy resin.
本発明は、前記添加剤が、ニトロアルカン系安定剤、エポキシド系安定剤及び防錆剤からなる群より選択される１種以上の添加剤である、前記に記載の溶剤組成物に関する。 The present invention relates to the solvent composition described above, wherein the additive is at least one additive selected from the group consisting of a nitroalkane stabilizer, an epoxide stabilizer, and a rust inhibitor.
本発明は、硬化性樹脂又はその硬化物が付着した被洗浄物を洗浄するための方法であって、前記に記載の溶剤組成物を該被洗浄物と接触させる工程を含むことを特徴とする方法に関する。 The present invention is a method for cleaning an object to be cleaned to which a curable resin or a cured product thereof is attached, and includes a step of bringing the solvent composition described above into contact with the object to be cleaned. Regarding the method.
本発明は、硬化性樹脂の硬化物が付着した被洗浄物を洗浄するための、前記に記載の方法であって、前記に記載の溶剤組成物を該被洗浄物と接触させる工程において、該硬化性樹脂の硬化物が該被洗浄物から剥離することを特徴とする方法に関する。 The present invention is the above-described method for cleaning an object to be cleaned to which a cured product of a curable resin is adhered, and in the step of contacting the solvent composition described above with the object to be cleaned, The present invention relates to a method in which a cured product of a curable resin is peeled from the object to be cleaned.
本発明の溶剤組成物は、広範囲な硬化性樹脂又はその硬化物が付着した被洗浄物に対して良好な洗浄効果を有し、特にウレタン樹脂、エポキシ樹脂又はウレタン樹脂若しくはエポキシ樹脂の硬化物が付着した被洗浄物の洗浄に適している。また、本発明の溶剤組成物は、毒性も少なく、安全性の面、及び更に揮発性が低く、消耗も少ないという経済的な面からも非常に優れている。 The solvent composition of the present invention has a good cleaning effect on a wide range of curable resins or articles to which the cured products adhere, and in particular, urethane resins, epoxy resins, urethane resins, or cured products of epoxy resins. Suitable for cleaning adhered objects. In addition, the solvent composition of the present invention is very excellent from the viewpoints of low toxicity, safety, and economical aspect of low volatility and low consumption.
本発明の溶剤組成物は、（ａ）ノルマルプロピルブロマイドを１５重量％〜５５重量％、（ｂ）Ｎ−メチル−２−ピロリドンを４０重量％〜８０重量％、及び（ｃ）添加剤を０．５重量％〜５重量％からなる。なお、本発明の溶剤組成物は、ノルマルプロピルブロマイドの製造工程において生成するイソプロピルブロマイドを不可避的な量で含み得る。 The solvent composition of the present invention comprises (a) normal propyl bromide of 15% to 55% by weight, (b) N-methyl-2-pyrrolidone of 40% to 80% by weight, and (c) an additive of 0%. .5% to 5% by weight. In addition, the solvent composition of this invention can contain the isopropyl bromide produced | generated in the manufacturing process of normal propyl bromide in an unavoidable quantity.
本発明の溶剤組成物は、Ｎ−メチル−２−ピロリドンを４０〜８０重量％含む。本発明において、Ｎ−メチル−２−ピロリドンの含有量が４０重量％未満であると、硬化性樹脂及びその硬化物を被洗浄物から効率よく洗浄除去することが難しく、８０重量％を超えると、硬化性樹脂及びその硬化物の洗浄効果が低下し、むしろ、Ｎ−メチル−２−ピロリドン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。 The solvent composition of the present invention contains 40 to 80% by weight of N-methyl-2-pyrrolidone. In the present invention, when the content of N-methyl-2-pyrrolidone is less than 40% by weight, it is difficult to efficiently wash and remove the curable resin and its cured product from the object to be cleaned, and when the content exceeds 80% by weight. In addition, the cleaning effect of the curable resin and the cured product thereof is lowered, and rather, the harmfulness to the human body such as skin irritation of N-methyl-2-pyrrolidone is not preferable.
本発明の溶剤組成物は、添加剤を０．５〜５重量％含む。添加剤としては、防錆剤、安定剤、界面活性剤、酸化防止剤及び紫外線吸収剤が挙げられる。 The solvent composition of the present invention contains 0.5 to 5% by weight of additives. Examples of the additive include a rust inhibitor, a stabilizer, a surfactant, an antioxidant, and an ultraviolet absorber.
防錆剤としては、モノエタノールアミン、ジエタノールアミン、トリエタノールアミン、モノイソプロパノールアミン、ジイソプロパノールアミン、トリイソプロパノールアミン、アミノメチルプロパノールアミン、アミノエチルエタノールアミン、シクロヘキシルアミン、ジシクロヘキシルアミン及びＮ，Ｎ−ビス（２−ヒドロキシエチル）−Ｎ−シクロヘキシルアミンが挙げられ、Ｎ，Ｎ−ビス（２−ヒドロキシエチル）−Ｎ−シクロヘキシルアミンが特に好ましい。 Examples of rust preventives include monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, diisopropanolamine, triisopropanolamine, aminomethylpropanolamine, aminoethylethanolamine, cyclohexylamine, dicyclohexylamine and N, N-bis ( 2-hydroxyethyl) -N-cyclohexylamine is exemplified, and N, N-bis (2-hydroxyethyl) -N-cyclohexylamine is particularly preferable.
安定剤としては、ニトロアルカン系安定剤及びエポキシド系安定剤が挙げられる。好ましくは、ニトロアルカン系安定剤及びエポキシド系安定剤の混合物である。 Examples of the stabilizer include nitroalkane stabilizers and epoxide stabilizers. Preferably, it is a mixture of a nitroalkane stabilizer and an epoxide stabilizer.
ニトロアルカン系安定剤としては、例えばニトロメタン、ニトロエタン、１−ニトロプロパン及び２−ニトロプロパンが挙げられる。 Examples of the nitroalkane stabilizer include nitromethane, nitroethane, 1-nitropropane and 2-nitropropane.
エポキシド系安定剤としては、例えばエピクロロヒドリン、プロピレンオキサイド、ブチレンオキサイド、シクロヘキセンオキサイド、グリシジルメチルエーテル、グリシジルメタクレート、ペンテンオキサイド、シクロペンテンオキサイド及びシクロヘキセンオキサイドが挙げられる。 Examples of the epoxide stabilizer include epichlorohydrin, propylene oxide, butylene oxide, cyclohexene oxide, glycidyl methyl ether, glycidyl methacrylate, pentene oxide, cyclopentene oxide, and cyclohexene oxide.
本発明の溶剤組成物は、硬化性樹脂、特に硬化前のウレタン樹脂及びエポキシ樹脂等の表面に付着した油類、ポリマー及びスケール等への浸透性や溶解速度の向上のために、界面活性剤を含有することができる。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、シリコーン系界面活性剤、及びフッ素系界面活性剤等が挙げられる。 The solvent composition of the present invention is a surfactant for improving the permeability and dissolution rate to oils, polymers, scales, etc. attached to the surface of curable resins, particularly urethane resins and epoxy resins before curing. Can be contained. As the surfactant, a nonionic surfactant is preferable, 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, Examples thereof include sucrose fatty acid esters, silicone surfactants, and fluorine surfactants.
本発明の溶剤組成物は、洗浄液の長期保存等における安定性の向上のために、紫外線吸収剤及び酸化防止剤を含有することができる。紫外線吸収剤は、本発明の溶剤組成物に溶解するものであればいずれも使用することができ、ベンゾトリアゾール系紫外線吸収剤、ベンゾフェノン系紫外線吸収剤、及びヒンダードアミン系紫外線吸収剤が挙げられる。酸化防止剤は、本発明の溶剤組成物に溶解するものであればいずれも使用することができ、フェノール系酸化防止剤、アミン系酸化防止剤、硫黄系酸化防止剤、及びリン系等酸化防止剤が挙げられる。 The solvent composition of the present invention can contain an ultraviolet absorber and an antioxidant in order to improve the stability of the cleaning liquid during long-term storage. Any ultraviolet absorber can be used as long as it is soluble in the solvent composition of the present invention, and examples thereof include benzotriazole ultraviolet absorbers, benzophenone ultraviolet absorbers, and hindered amine ultraviolet absorbers. Any antioxidant can be used as long as it is soluble in the solvent composition of the present invention, such as phenolic antioxidants, amine-based antioxidants, sulfur-based antioxidants, and phosphorus-based antioxidants. Agents.
本発明において、これらの添加剤は、単独で用いることもでき、また複数の混合物として用いることもできる。添加剤として、安定剤及び防錆剤が好ましく、より好ましくは、ニトロアルカン系安定剤、エポキシド系安定剤及び防錆剤からなる群より選択される１種以上の添加剤である。 In the present invention, these additives can be used alone or as a mixture. As the additive, a stabilizer and a rust preventive agent are preferable, and one or more additives selected from the group consisting of a nitroalkane stabilizer, an epoxide stabilizer, and a rust preventive agent are more preferable.
本発明において、被洗浄物に付着した硬化性樹脂には、硬化性樹脂のほかに、硬化性樹脂に配合される添加剤を含む硬化性樹脂が含まれる。 In the present invention, the curable resin attached to the object to be cleaned includes a curable resin containing an additive blended with the curable resin in addition to the curable resin.
本発明において、硬化性樹脂としては、ウレタン樹脂及びエポキシ樹脂が挙げられる。 In the present invention, examples of the curable resin include a urethane resin and an epoxy resin.
また、硬化性樹脂に配合される添加剤としては、硬化性樹脂に通常用いられている添加剤であれば、特に限定されるものではなく、硬化剤、硬化促進剤、充填剤、乳化剤、発泡剤、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、及び反応希釈剤が挙げられる。 Moreover, as an additive mix | blended with curable resin, if it is an additive normally used for curable resin, it will not specifically limit, A hardening | curing agent, a hardening accelerator, a filler, an emulsifier, foaming Agents, stabilizers, plasticizers, lubricants, flame retardants, flame retardant aids, antistatic agents, colorants, charge imparting agents, peristaltic modifiers, impact modifiers, and reaction diluents.
エポキシ樹脂としては、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、３，４−エポキシシクロヘキシル−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シド、クレゾールノボラック型エポキシ樹脂、及びヒダントイン環を有するエポキシ樹脂が挙げられる。エポキシ樹脂に配合される添加剤としては、硬化剤、硬化促進剤、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、及び反応希釈剤等の添加剤が挙げられる。 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, 3,4-epoxycyclohexyl-3 ′, 4 Examples include '-epoxycyclohexanecarboxylate, vinylcyclohexene diepoxide, cresol novolac type epoxy resin, and epoxy resin having a hydantoin ring. Additives blended in the epoxy resin include curing agents, curing accelerators, fillers, stabilizers, plasticizers, lubricants, flame retardants, flame retardant aids, antistatic agents, colorants, charge imparting agents, cocoons Examples thereof include additives such as a mobility improver, an impact resistance improver, and a reaction diluent.
エポキシ樹脂硬化剤としては、エポキシ樹脂の硬化剤として通常使用されているものであればいずれであってもよく、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、及びビスフェノール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、及び無水ベンゾフェノンテトラカルボン酸等の酸無水物、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、及びヘキサメチレンテトラミン等のアミン類、並びにポリアミドアミン等のアミド樹脂等が挙げられる。硬化促進剤としては、例えば第三級アミン類又は有機リン化合物が挙げられる。 The epoxy resin curing agent may be any one as long as it is usually used as a curing agent for epoxy resins. For example, novolak such as phenol novolak, biphenol type novolak, and bisphenol A type novolak, phthalic anhydride, Examples thereof include acid anhydrides such as pyromellitic anhydride and benzophenone tetracarboxylic anhydride, amines such as diaminodiphenylmethane, diaminodiphenylsulfone, metaphenylenediamine, and hexamethylenetetramine, and amide resins such as polyamideamine. Examples of the curing accelerator include tertiary amines or organic phosphorus compounds.
ウレタン樹脂としては、トリレンジイソシアナート（ＴＤＩ）、及び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、並びにポリプロピレングリコール等のポリオール類との反応生成物が挙げられる。本発明において、ウレタン樹脂に配合される添加剤としては、硬化剤、硬化促進剤、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、及び耐衝撃性改良剤が挙げられる。 Examples of the urethane resin include reaction products with diisocyanates such as tolylene diisocyanate (TDI) and diphenylmethane diisocyanate (MDI), and polyols such as polypropylene glycol. In the present invention, additives added to the urethane resin include a curing agent, a curing accelerator, an emulsifier, a foaming agent, a stabilizer, a plasticizer, a flame retardant, an antistatic agent, a colorant, a sliding property improver, and Examples include impact resistance improvers.
本発明において、被洗浄物に付着した硬化性樹脂の硬化物には、硬化性樹脂の硬化反応が促進することにより硬化する硬化物のほかに、反応希釈剤等の硬化性樹脂に配合された添加剤が揮発し、粘度が上昇するによって固化した固化物も含まれる。 In the present invention, the cured product of the curable resin adhered to the object to be cleaned is blended with a curable resin such as a reaction diluent in addition to a cured product that is cured by promoting the curing reaction of the curable resin. Also included are solidified products that have solidified as the additive volatilizes and the viscosity increases.
本発明の溶剤組成物を用いて洗浄される被洗浄物として、硬化性樹脂を取り扱うために用いられる装置、例えば、容器、混合機、成形機、貯蔵タンク、加工機、混合槽、注型機、注入機、コーティング装置及び封入機；並びに、硬化性樹脂の加工物、例えばウレタン樹脂の加工物（例えば自動車部品及び電子部品など）及びエポキシ樹脂の加工物（例えば電子部品、配管部品及び自動車部品など）が挙げられる。 As an object to be cleaned using the solvent composition of the present invention, an apparatus used for handling a curable resin, for example, a container, a mixer, a molding machine, a storage tank, a processing machine, a mixing tank, a casting machine , Injection machines, coating devices and sealing machines; and curable resin workpieces such as urethane resin workpieces (eg automotive parts and electronic parts) and epoxy resin workpieces (eg electronic parts, piping parts and automotive parts) Etc.).
硬化性樹脂を取り扱うために用いられる装置には、樹脂成分の充填及び混合、硬化成型などの樹脂の加工工程、及び装置の洗浄を繰り返して使用されるものが含まれる。また、注型器及び容器等は、一般に、原料成分の注入、硬化成型及び洗浄を繰り返して使用される。 Apparatuses used for handling curable resins include those that are used by repeatedly filling and mixing resin components, resin processing steps such as curable molding, and apparatus cleaning. Moreover, a casting machine, a container, etc. are generally used by repeating injection | pouring of a raw material component, hardening molding, and washing | cleaning.
硬化性樹脂の加工物、例えばウレタン樹脂の加工物及びエポキシ樹脂の加工物は、加工物の成型の際に用いられたウレタン樹脂及びエポキシ樹脂以外の素材を再利用する目的で用いられる物が含まれる。具体的には、これらウレタン樹脂の加工物及びエポキシ樹脂の加工物に不良が発生した場合、ウレタン樹脂及びエポキシ樹脂以外の素材を、ウレタン樹脂の硬化物及びエポキシ樹脂の硬化物から分離して再利用する。 Workpieces of curable resins, such as urethane resin workpieces and epoxy resin workpieces, include those used for the purpose of reusing materials other than urethane resins and epoxy resins used in molding of workpieces. It is. Specifically, when defects occur in these urethane resin processed products and epoxy resin processed products, materials other than the urethane resin and epoxy resin are separated from the urethane resin cured product and the epoxy resin cured product, and are then recycled. Use.
このような素材として、例えば、ステンレス等の各種金属部品がある。すなわち、自動車用のシャフトやフレーム部品、外装部品等に用いられる金属製部品をはじめ、プリンタ等の電子機器に用いられるローラーシャフトやフレーム部品、さらにパイプ等の配管部品などがある。これらの金属製部品は、板状部材に限らず、断面円形状や矩形状のパイプ状部材や長尺部材であったり、その他、複雑な形状を有する部材であったりする。 Examples of such a material include various metal parts such as stainless steel. That is, there are metal parts used for automobile shafts, frame parts, exterior parts and the like, roller shafts and frame parts used for electronic devices such as printers, and pipe parts such as pipes. These metal parts are not limited to plate-like members, but may be pipe-like members or long members having a circular cross section or a rectangular shape, or other members having complicated shapes.
本発明の溶剤組成物は、硬化性樹脂又は硬化性樹脂の硬化物が付着した被洗浄物から、該硬化性樹脂又は硬化性樹脂の硬化物を、溶解除去又は剥離除去して、被洗浄物を洗浄するために用いられる。本発明の溶剤組成物は、ステンレス製の板及びステンレス製パイプなどの複雑な形状を有する金属部品と、硬化性樹脂とを一体成型することにより得られる、硬化性樹脂の硬化物が付着した被洗浄物から、硬化性樹脂の硬化物を剥離除去するための溶剤組成物として用いることができる。特に、ステンレス製のパイプ又は円柱の外周に硬化性樹脂の硬化物が付着している硬化性樹脂の加工物、例えばプリンタローラである場合、プリンタのシャフトに一体的に固着されたゴムやプラスチックなどのローラ部分を剥離除去することができる。このようなプリンタローラのゴム部分の材質として、エピクロロヒドリンゴムが挙げられる。 The solvent composition of the present invention is obtained by dissolving or removing the curable resin or the cured product of the curable resin from the object to be cleaned to which the curable resin or the cured product of the curable resin is attached. Used to wash. The solvent composition of the present invention is obtained by integrally molding a metal part having a complicated shape, such as a stainless steel plate and a stainless steel pipe, and a curable resin, to which a cured product of a curable resin is attached. It can be used as a solvent composition for peeling and removing a cured product of a curable resin from a washed product. In particular, in the case of a curable resin processed product in which a cured product of curable resin adheres to the outer periphery of a stainless steel pipe or cylinder, such as a printer roller, rubber or plastic integrally fixed to the printer shaft, etc. The roller portion can be peeled and removed. As a material for the rubber part of such a printer roller, epichlorohydrin rubber can be cited.
本発明の溶剤組成物は、好ましくは（ａ）ノルマルプロピルブロマイドを１５重量％〜４５重量％、（ｂ）Ｎ−メチル−２−ピロリドンを５０重量％〜８０重量％、及び（ｃ）添加剤を０．５重量％〜５重量％からなり、より好ましくは（ａ）ノルマルプロピルブロマイドを２５重量％〜４５重量％、（ｂ）Ｎ−メチル−２−ピロリドンを５０重量％〜７０重量％、及び（ｃ）添加剤を０．５重量％〜５重量％からなり、更に好ましくは（ａ）ノルマルプロピルブロマイドを３５重量％〜４５重量％、（ｂ）Ｎ−メチル−２−ピロリドンを５０重量％〜６０重量％、及び（ｃ）添加剤を０．５重量％〜５重量％からなる。このような範囲であれば、硬化性樹脂に対する溶解力も高く、なおかつ、粘度がＮ−メチル−２−ピロリドン単体よりも低く、しいては、被洗浄物に対する浸透力が高くなり、洗浄時間が短くなる点で良好である。 The solvent composition of the present invention preferably comprises: (a) 15% to 45% by weight of normal propyl bromide; (b) 50% to 80% by weight of N-methyl-2-pyrrolidone; and (c) an additive. 0.5 wt% to 5 wt%, more preferably (a) normal propyl bromide 25 wt% to 45 wt%, (b) N-methyl-2-pyrrolidone 50 wt% to 70 wt%, And (c) 0.5% to 5% by weight of additive, more preferably (a) 35% to 45% by weight of normal propyl bromide, and (b) 50% of N-methyl-2-pyrrolidone. % To 60% by weight, and (c) the additive comprises 0.5% to 5% by weight. Within such a range, the dissolving power to the curable resin is high, and the viscosity is lower than that of N-methyl-2-pyrrolidone alone, so that the penetrating power to the object to be cleaned is high and the cleaning time is short. It is favorable at this point.
また、硬化性樹脂の硬化物が付着したステンレス製のパイプ又は円柱から、硬化性樹脂の硬化物を剥離除去するための溶剤組成物、つまり剥離剤として使用する場合、本発明の溶剤組成物は、好ましくは（ａ）ノルマルプロピルブロマイドを１５重量％〜４５重量％、（ｂ）Ｎ−メチル−２−ピロリドンを５０重量％〜８０重量％、及び（ｃ）添加剤を０．５重量％〜５重量％からなり、より好ましくは（ａ）ノルマルプロピルブロマイドを２５重量％〜４５重量％、（ｂ）Ｎ−メチル−２−ピロリドンを５０重量％〜７０重量％、及び（ｃ）添加剤を０．５重量％〜５重量％からなる。 Also, when used as a solvent composition for peeling and removing a cured product of a curable resin from a stainless steel pipe or cylinder to which a cured product of a curable resin is attached, that is, when used as a release agent, the solvent composition of the present invention is Preferably (a) 15% to 45% by weight of normal propyl bromide, (b) 50% to 80% by weight of N-methyl-2-pyrrolidone, and (c) 0.5% to 5% by weight, more preferably (a) 25% to 45% by weight of normal propyl bromide, (b) 50% to 70% by weight of N-methyl-2-pyrrolidone, and (c) an additive. It consists of 0.5 wt% to 5 wt%.
本発明の溶剤組成物は、原料成分であるノルマルプロピルブロマイド、Ｎ−メチル−２−ピロリドン、及び添加剤を混合することにより製造することができる。 The solvent composition of the present invention can be produced by mixing normal propyl bromide, N-methyl-2-pyrrolidone and additives as raw material components.
本発明において、硬化性樹脂又はその硬化物が付着した被洗浄物を洗浄する方法は、本発明の溶剤組成物を、前記被洗浄物と接触させる工程を含む。本発明において、本発明の溶剤組成物を被洗浄物に接触させる工程において、被洗浄物に付着した硬化性樹脂又はその硬化物は、被洗浄物から溶解除去されるか、又は剥離除去される。本発明において、硬化性樹脂の硬化物が付着した被洗浄物を洗浄するための方法は、本発明の溶剤組成物を被洗浄物に接触させる工程において、硬化性樹脂の硬化物が被洗浄物から剥離することが好ましい。 In the present invention, the method for cleaning the object to be cleaned to which the curable resin or its cured product adheres includes a step of bringing the solvent composition of the present invention into contact with the object to be cleaned. In the present invention, in the step of bringing the solvent composition of the present invention into contact with the object to be cleaned, the curable resin or the cured product adhering to the object to be cleaned is dissolved and removed from the object to be cleaned or peeled off. . In the present invention, a method for cleaning an object to be cleaned, to which a cured product of a curable resin is attached, includes the step of bringing the solvent composition of the present invention into contact with the object to be cleaned. It is preferable to peel from.
本発明の溶剤組成物と、前記硬化性樹脂又はその硬化物が付着した被洗浄物とを接触させるための方法としては、特に制限はなく、溶剤組成物への前記被洗浄物の浸漬、溶剤組成物を含浸したスポンジによる前記被洗浄物の拭き取り、及び前記被洗浄物に対する溶剤組成物のスプレー等が好ましく、浸漬による方法がより好ましい。 The method for bringing the solvent composition of the present invention into contact with the curable resin or the object to be cleaned attached thereto is not particularly limited, and the object to be cleaned is immersed in the solvent composition, the solvent. Wiping of the object to be cleaned with a sponge impregnated with the composition, spraying of the solvent composition on the object to be cleaned, and the like are preferable, and a method by immersion is more preferable.
浸漬による方法において、洗浄効果を高めるために、浸漬と同時に、攪拌、揺動、超音波振動、又はエアバブリング等による手段を組み合わせることが好ましく、超音波振動による手段を組み合わせることがより好ましい。超音波振動は、発振周波数が２０〜１００ｋＨｚであり、発振出力が１０〜５００Ｗであるのが好ましい。エアバブリングでは、微細な気泡を、好ましくは、ガス及び溶剤組成物の体積比が１：１〜５：１となるように通気することで、溶剤組成物に不溶性の汚れを気泡と共に上昇させることができ、これにより被洗浄物に付着した硬化性樹脂又はその硬化物のみならず、不溶性の汚れをも分離することができる。 In the immersion method, in order to enhance the cleaning effect, it is preferable to combine means by stirring, shaking, ultrasonic vibration, air bubbling or the like at the same time as immersion, and more preferable to combine means by ultrasonic vibration. The ultrasonic vibration preferably has an oscillation frequency of 20 to 100 kHz and an oscillation output of 10 to 500 W. In air bubbling, fine bubbles are preferably ventilated so that the volume ratio of the gas and the solvent composition is 1: 1 to 5: 1, thereby raising dirt insoluble in the solvent composition together with the bubbles. As a result, not only the curable resin adhering to the object to be cleaned or its cured product but also insoluble dirt can be separated.
本発明において、溶剤組成物及び被洗浄物の接触時間に相当する洗浄時間は、被洗浄物に付着した硬化性樹脂又は被洗浄物に付着した硬化性樹脂の硬化物を洗浄除去できる時間であれば特に制限されない。 In the present invention, the cleaning time corresponding to the contact time of the solvent composition and the object to be cleaned may be a period of time for cleaning and removing the curable resin adhering to the object to be cleaned or the curable resin adhering to the object to be cleaned. There is no particular limitation.
例えば、超音波振動を組み合わせた浸漬による方法における洗浄時間は、硬化前の硬化性樹脂が付着した被洗浄物を洗浄するために、好ましくは５秒間〜５分間、特に好ましくは１０秒間〜１分間であり、硬化性樹脂組成物の硬化物が付着した被洗浄物を洗浄するために、好ましくは１０分間〜１０時間、特に好ましくは３０分間〜２時間である。 For example, the cleaning time in the method of immersion combined with ultrasonic vibration is preferably 5 seconds to 5 minutes, particularly preferably 10 seconds to 1 minute, in order to clean the object to be cleaned to which the curable resin before curing has adhered. In order to wash the object to be cleaned to which the cured product of the curable resin composition is adhered, it is preferably 10 minutes to 10 hours, particularly preferably 30 minutes to 2 hours.
上記洗浄時間未満である場合は洗浄が不十分で、付着した硬化性樹脂又はその硬化物を被洗浄物から十分に除去できない場合があり、一方、上記洗浄時間を超えた場合は、洗浄効果が格別向上しない。 If it is less than the above cleaning time, the cleaning may be insufficient and the attached curable resin or cured product thereof may not be sufficiently removed from the object to be cleaned. There is no particular improvement.
本発明において洗浄温度は、好ましくは２０〜１２０℃である。このような温度において、より高温で処理することにより洗浄効果を上昇させることができる。 In the present invention, the washing temperature is preferably 20 to 120 ° C. At such a temperature, the cleaning effect can be increased by processing at a higher temperature.
以下、本発明を実施例及び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。 EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further in detail, this invention is not limited by these Examples.
実施例１〜７及び比較例１〜４の溶剤組成物を、表１で示される組成で各成分を混合することにより調製した。 The solvent compositions of Examples 1 to 7 and Comparative Examples 1 to 4 were prepared by mixing each component with the composition shown in Table 1.
試験例１ 硬化前ウレタン樹脂
（１−１）硬化前ウレタン樹脂が付着したステンレス板の作製
ウレタン樹脂として、三洋化成工業株式会社製のＦ−３５００Ａ（主剤）及びＦ−３５００Ｂ（硬化剤）を用いた。このウレタン樹脂は、主剤及び硬化剤の混合後、室温１２０秒で表面の硬化が開始する。４ｃｍ×４ｃｍ、厚さ０．４ｍｍのステンレス板に、主剤及び硬化剤を混合したウレタン樹脂を厚さ４０ｍｍほど塗布し、室温にて６０秒間硬化させて、樹脂が付着したステンレス板を得た。
Test Example 1 Pre-curing urethane resin (1-1) Production of stainless steel plate with pre-cured urethane resin adhered F-3500A (main agent) and F-3500B (curing agent) manufactured by Sanyo Chemical Industries Ltd. are used as the urethane resin. It was. The urethane resin begins to harden at a room temperature of 120 seconds after mixing the main agent and the curing agent. A stainless steel plate having a thickness of 4 cm × 4 cm and a thickness of 0.4 mm was coated with a urethane resin mixed with the main agent and a curing agent by a thickness of about 40 mm and cured at room temperature for 60 seconds to obtain a stainless steel plate to which the resin adhered.
（１−２）被洗浄物の洗浄
洗浄試験のため、２００ミリリットルのビーカーに、実施例１〜７及び比較例１〜５の各溶剤組成物１５０ｇを入れた。樹脂が付着したステンレス板を、実施例１〜７及び比較例１〜４の溶剤組成物に浸漬させて、超音波洗浄機（発振周波数３８ｋＨｚ、出力３６０Ｗ）にて１０秒間洗浄を行った。洗浄後、ステンレス板を取り出してウレタン樹脂が溶解除去できているかどうかを目視により判定した。
(1-2) Cleaning of an object to be cleaned For a cleaning test, 150 g of the solvent compositions of Examples 1 to 7 and Comparative Examples 1 to 5 were placed in a 200 ml beaker. The stainless steel plate to which the resin was adhered was immersed in the solvent compositions of Examples 1 to 7 and Comparative Examples 1 to 4, and washed for 10 seconds with an ultrasonic cleaner (oscillation frequency 38 kHz, output 360 W). After washing, the stainless steel plate was taken out and it was visually determined whether the urethane resin could be dissolved and removed.
試験例２ 硬化後ウレタン樹脂（１）
（２−１）硬化後ウレタン樹脂が付着したステンレス板の作製
ウレタン樹脂組成物として、株式会社エアータイト社製のクリームエアータイトフォームＡＴＦ−００１を用いた。このウレタン樹脂組成物は、約１５分で表面が硬化し始め、約１時間程度で内部もほぼ硬化する。４ｃｍ×４ｃｍ、厚さ０．４ｍｍのステンレス板に、ウレタン樹脂を厚さ４０ｍｍほど塗布し、室温にて約１時間放置して硬化させて、ウレタン樹脂が付着したステンレス板を得た。
Test Example 2 Urethane resin after curing (1)
(2-1) Preparation of stainless steel plate to which urethane resin adhered after curing As a urethane resin composition, Cream Air Tight Foam ATF-001 manufactured by Air Tight Co., Ltd. was used. The surface of this urethane resin composition begins to harden in about 15 minutes, and the inside also hardens in about 1 hour. A stainless steel plate having a thickness of 4 cm × 4 cm and a thickness of 0.4 mm was coated with a urethane resin having a thickness of about 40 mm and allowed to stand at room temperature for about 1 hour to be cured to obtain a stainless steel plate to which the urethane resin was adhered.
（２−２）被洗浄物の洗浄
被洗浄物の洗浄のため、２００ミリリットルのビーカーに、実施例１〜７及び比較例１〜４の各溶剤組成物１５０ｇを入れた。樹脂が付着したステンレス板を、実施例１〜７及び比較例１〜４の溶剤組成物に浸漬させて、約１時間放置した。その後、ステンレス板を取り出してウレタン樹脂が剥離除去できているかどうかを目視により判定した。
(2-2) Cleaning of an object to be cleaned In order to clean an object to be cleaned, 150 g of each of the solvent compositions of Examples 1 to 7 and Comparative Examples 1 to 4 were placed in a 200 ml beaker. The stainless steel plate to which the resin adhered was immersed in the solvent compositions of Examples 1 to 7 and Comparative Examples 1 to 4, and left for about 1 hour. Thereafter, the stainless steel plate was taken out and it was visually judged whether or not the urethane resin could be removed.
試験例１及び２の結果を表２に示す。 The results of Test Examples 1 and 2 are shown in Table 2.
試験例３ 硬化前エポキシ樹脂
（３−１）硬化前エポキシ樹脂が付着したステンレス板の作製
エポキシ樹脂として、京セラケミカル社製エポキシレジンＴＣＧ１６２８Ａ（主剤）及びＴＣＧ１６２８Ｂ（硬化剤）を用いた。このエポキシ樹脂は、主剤及び硬化剤の混合後、室温２４時間で表面の硬化が開始する。４ｃｍ×４ｃｍ、厚さ０．４ｍｍのステンレス板に、主剤及び硬化剤を混合したエポキシ樹脂を厚さ１ｍｍほど塗布し、樹脂が付着したステンレス板を得た。樹脂の塗布後、直ちに洗浄テストを行った。
Test Example 3 Pre-Cure Epoxy Resin (3-1) Production of Stainless Steel Plate Adhered with Pre-Cure Epoxy Resin Epoxy resins TCG1628A (main agent) and TCG1628B (curing agent) manufactured by Kyocera Chemical Co., Ltd. were used as epoxy resins. The epoxy resin begins to harden at a room temperature of 24 hours after mixing the main agent and the curing agent. An epoxy resin mixed with a main agent and a curing agent was applied to a 4 cm × 4 cm, 0.4 mm thick stainless steel plate to a thickness of about 1 mm to obtain a stainless steel plate to which the resin adhered. A cleaning test was performed immediately after application of the resin.
（３−２）被洗浄物の洗浄
被洗浄物の洗浄のため、２００ミリリットルのビーカーに、実施例１〜７及び比較例１〜４の各溶剤組成物１５０ｇを入れた。樹脂が付着したステンレス板を、樹脂の塗布後直ちに実施例１〜７及び比較例１〜４の溶剤組成物に浸漬させて、超音波洗浄機（発振周波数３８ｋＨｚ、出力３６０Ｗ）にて洗浄を１０秒間行った。洗浄後、ステンレス板を取り出してエポキシ樹脂が溶解除去できているかどうかを目視により判定した。
(3-2) Cleaning of an object to be cleaned In order to clean an object to be cleaned, 150 g of the solvent compositions of Examples 1 to 7 and Comparative Examples 1 to 4 were placed in a 200 ml beaker. Immediately after application of the resin, the stainless steel plate to which the resin is adhered is immersed in the solvent compositions of Examples 1 to 7 and Comparative Examples 1 to 4, and washed with an ultrasonic cleaner (oscillation frequency 38 kHz, output 360 W). For a second. After washing, the stainless steel plate was taken out and it was visually determined whether or not the epoxy resin could be dissolved and removed.
試験例４ 硬化後エポキシ樹脂
（４−１）硬化後エポキシ樹脂が付着したステンレス板の作製
エポキシ樹脂として、コニシ社のボンドＥ２５０（Ａ剤：エポキシ、Ｂ剤：ポリアミドアミン）を用いた。このエポキシ樹脂は、Ａ剤及びＢ剤を混合後、室温２０℃にて２４時間後で実用強度に達する。４ｃｍ×４ｃｍ、厚さ０．４ｍｍのステンレス板に、Ａ剤及びＢ剤を混合したエポキシ樹脂を、厚さ１ｍｍほど塗布し、室温にて２４時間硬化させて、樹脂が付着したステンレス板を得た。
Test Example 4 Cured Epoxy Resin (4-1) Production of Stainless Steel Plate Adhered with Epoxy Resin After Curing Bond E250 (A Agent: Epoxy, B Agent: Polyamidoamine) manufactured by Konishi Co., Ltd. was used as the epoxy resin. This epoxy resin reaches practical strength after 24 hours at room temperature of 20 ° C. after mixing the A and B agents. An epoxy resin in which agent A and agent B are mixed is applied to a stainless steel plate having a size of 4 cm × 4 cm and a thickness of 0.4 mm, about 1 mm in thickness, and cured at room temperature for 24 hours to obtain a stainless steel plate to which the resin is adhered. It was.
（４−２）被洗浄物の洗浄
被洗浄物の洗浄のため、２００ミリリットルのビーカーに、実施例１〜７及び比較例１〜４の各溶剤組成物１５０ｇを入れた。樹脂が付着したステンレス板を、実施例１〜７及び比較例１〜４の溶剤組成物に浸漬させて、超音波洗浄機（発振周波数３８ｋＨｚ、出力３６０Ｗ）にて１時間洗浄を行った。洗浄後、ステンレス板を取り出してエポキシ樹脂が剥離除去できているかどうかを目視により判定した。
(4-2) Cleaning of an object to be cleaned In order to clean an object to be cleaned, 150 g of the solvent compositions of Examples 1 to 7 and Comparative Examples 1 to 4 were placed in a 200 ml beaker. The stainless steel plate to which the resin was adhered was immersed in the solvent compositions of Examples 1 to 7 and Comparative Examples 1 to 4, and washed for 1 hour with an ultrasonic cleaner (oscillation frequency 38 kHz, output 360 W). After washing, the stainless steel plate was taken out and it was visually judged whether or not the epoxy resin could be removed.
試験例３及び４の結果を表３に示す。 The results of Test Examples 3 and 4 are shown in Table 3.
試験例５ 硬化後エポキシ樹脂（２）
（５−１）硬化後エポキシ樹脂が付着したステンレスパイプの作製
エポキシ樹脂として、コニシ社のボンドＥ２５０（Ａ剤：エポキシ、Ｂ剤：ポリアミドアミン）を用いた。このエポキシ樹脂は、Ａ剤及びＢ剤を混合後、室温２０℃にて２４時間後で実用強度に達する。Ａ剤及びＢ剤を混合したエポキシ樹脂を、外径１３ｍｍ、内径１１ｍｍ、長さ９０ｍｍのステンレスパイプの外周面に沿って厚さ２ｍｍほど塗布した。塗布したステンレスパイプを２４時間放置し、完全硬化させて、樹脂が付着したステンレスパイプを得た。
Test Example 5 Cured epoxy resin (2)
(5-1) Production of Stainless Steel Pipe with Epoxy Resin Adhered After Curing Bond E250 (A Agent: Epoxy, B Agent: Polyamidoamine) manufactured by Konishi Co., Ltd. was used as the epoxy resin. This epoxy resin reaches practical strength after 24 hours at room temperature of 20 ° C. after mixing the A and B agents. The epoxy resin mixed with the A agent and the B agent was applied to the thickness of about 2 mm along the outer peripheral surface of a stainless steel pipe having an outer diameter of 13 mm, an inner diameter of 11 mm, and a length of 90 mm. The coated stainless steel pipe was allowed to stand for 24 hours and completely cured to obtain a stainless steel pipe to which resin was adhered.
（５−２）被洗浄物の洗浄
被洗浄物の洗浄のため、２００ミリリットルのビーカーに、実施例１〜７及び比較例１〜４の各溶剤組成物１５０ｇを入れた。樹脂が付着したステンレスパイプを、実施例１〜７及び比較例１〜４の溶剤組成物に浸漬させて、室温にて６時間放置した。その後、ステンレスパイプを取り出して、エポキシ樹脂が剥離されたかどうかを目視により判定した。
(5-2) Cleaning of an object to be cleaned In order to clean an object to be cleaned, 150 g of the solvent compositions of Examples 1 to 7 and Comparative Examples 1 to 4 were placed in a 200 ml beaker. The stainless steel pipe to which the resin was attached was immersed in the solvent compositions of Examples 1 to 7 and Comparative Examples 1 to 4, and left at room temperature for 6 hours. Thereafter, the stainless steel pipe was taken out and it was visually determined whether or not the epoxy resin was peeled off.
試験例６ 硬化後ウレタン樹脂（２）
（６−１）硬化後ウレタン樹脂が付着したステンレスパイプの作製
ウレタン樹脂として、株式会社エアータイト社製のクリームエアータイトフォームＡＴＦ−００１を用いた。このウレタン樹脂は、約１５分で表面が硬化し始め、約１時間程度で内部もほぼ硬化する。ウレタン樹脂を、外径１３ｍｍ、内径１１ｍｍ、長さ９０ｍｍのステンレスパイプの外周面に沿って厚さ１０〜１５ｍｍほど塗布した。塗布したステンレスパイプを１．５時間放置し、硬化させて、樹脂が付着したステンレスパイプを得た。
Test Example 6 Cured urethane resin (2)
(6-1) Preparation of stainless steel pipe to which urethane resin was adhered after curing Cream air tight foam ATF-001 manufactured by Air Tight Co., Ltd. was used as the urethane resin. The surface of this urethane resin begins to harden in about 15 minutes, and the inside also hardens in about 1 hour. A urethane resin was applied to a thickness of 10 to 15 mm along the outer peripheral surface of a stainless steel pipe having an outer diameter of 13 mm, an inner diameter of 11 mm, and a length of 90 mm. The coated stainless steel pipe was allowed to stand for 1.5 hours and cured to obtain a stainless steel pipe to which resin was adhered.
（６−２）被洗浄物の洗浄
被洗浄物の洗浄のため、２００ミリリットルのビーカーに、実施例１〜７及び比較例１〜４の各溶剤組成物１５０ｇを入れた。ウレタン樹脂が付着したステンレスパイプを、実施例１〜７及び比較例１〜４の溶剤組成物に浸漬させて、室温にて１時間放置した。その後、ステンレスパイプを取り出してウレタン樹脂が剥離されたかどうかを目視により判定した。
(6-2) Cleaning of the object to be cleaned For cleaning the object to be cleaned, 150 g of the solvent compositions of Examples 1 to 7 and Comparative Examples 1 to 4 were placed in a 200 ml beaker. The stainless steel pipe to which the urethane resin was adhered was immersed in the solvent compositions of Examples 1 to 7 and Comparative Examples 1 to 4, and left at room temperature for 1 hour. Thereafter, the stainless steel pipe was taken out and it was visually judged whether or not the urethane resin was peeled off.
試験例５及び６の結果を表４に示す。 The results of Test Examples 5 and 6 are shown in Table 4.
本願発明の好ましい含有量の溶剤組成物である実施例２〜７の溶剤組成物を用いた場合は、ステンレスパイプのような複雑な形状を有する被洗浄物であっても、硬化性樹脂の硬化物に対して優れた剥離洗浄力を示していた。 When the solvent composition of Examples 2 to 7 which is a solvent composition having a preferable content of the present invention is used, even if the object to be cleaned has a complicated shape such as a stainless steel pipe, the curable resin is cured. It showed excellent peeling and cleaning power for objects.
本発明は、広範囲な硬化性樹脂又はその硬化物が付着した被洗浄物に対して良好な洗浄効果を有し、特にウレタン樹脂及びエポキシ樹脂、並びにそれらの硬化物が付着した被洗浄物に対して良好な洗浄効果を有する。本発明の溶剤組成物は、硬化性樹脂又はその硬化物が付着した被洗浄物に対する洗浄剤として工業的に極めて有用である。 The present invention has a good cleaning effect on a wide range of curable resins or objects to be cleaned attached, and particularly for urethane resins and epoxy resins, and objects to be cleaned to which these cured products are attached. And has a good cleaning effect. The solvent composition of the present invention is industrially extremely useful as a cleaning agent for an object to be cleaned to which a curable resin or a cured product thereof is attached.
Claims (3)
（ｂ）Ｎ−メチル−２−ピロリドンを５０重量％〜８０重量％、及び
（ｃ）添加剤を０．５〜５重量％
からなることを特徴とする、硬化性樹脂の硬化物が外周に付着したステンレス製のパイプ又は円柱から、硬化性樹脂の硬化物を剥離除去するための溶剤組成物であって、
硬化性樹脂が、ウレタン樹脂又はエポキシ樹脂である、溶剤組成物。 (A) 15% to 45% by weight of normal propyl bromide,
(B) 50% to 80% by weight of N-methyl-2-pyrrolidone, and (c) 0.5 to 5% by weight of additive.
It is a solvent composition for peeling and removing a cured product of a curable resin from a stainless steel pipe or cylinder having a cured product of a curable resin attached to the outer periphery, characterized by comprising:
The solvent composition whose curable resin is a urethane resin or an epoxy resin .
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