JP2008126109A - Treatment method of circulating water of wet coating booth - Google Patents
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本発明は自動車、家庭電気製品などの塗装工程で油性塗料を用いている湿式塗装ブース循環水の処理方法に関する。 The present invention relates to a method for treating circulating water in a wet paint booth that uses an oil-based paint in a painting process of automobiles, household electrical appliances, and the like.
自動車、家庭用電気製品などの塗装工程では一般に塗装ブース内でポリアクリル樹脂系やポリエステル樹脂系の油性塗料を噴霧して塗装し、対象物に塗着しなかった未塗着塗料は水で捕集し処理されている。水に捕集された未塗着塗料は粘着性が高いため、ポンプ、循環水配管、シャワーノズルなどに付着して水の循環を悪くし、さらに塗料の捕集効率を著しく低下させる原因となる。これは作業効率の低下ばかりでなく、装置寿命の短期化、塗料ミストの屋外排出、臭気の発生などの問題を引き起こすことになる。 In the painting process of automobiles and household electrical appliances, polyacrylic resin or polyester resin-based oil paint is generally sprayed in the painting booth, and unpainted paint that has not been applied to the target is captured with water. Collected and processed. Uncoated paint collected in water is highly sticky, and it can adhere to pumps, circulating water pipes, shower nozzles, etc., causing poor water circulation and significantly reducing paint collection efficiency. . This not only reduces the work efficiency, but also causes problems such as shortening the device life, discharging paint mist outdoors, and generating odors.
これらの問題を解決するために、スプレーブース循環水の処理として、水酸化ナトリウムなどのアルカリ剤を使用する方法（例えば特許文献１参照）、亜鉛、鉄、アルミニウムなどの両性金属塩とヘキサメチレンジアミン・エチレンジクロライド重合体とポリアミド・エピクロリヒドリン樹脂を使用する方法（例えば特許文献２参照）、硫酸アルミニウムとジメチルアミノメタクリレート硫酸塩−（メタ）アクリルアミド共重合体を使用する方法（例えば特許文献３参照）、アルミニウム塩と両性重合体を使用する方法（例えば特許文献４参照）、メラミン−アルデヒド樹脂酸コロイドを使う方法（例えば特許文献５参照）、尿素−メラミン−アルデヒド樹脂酸コロイドを使用する方法（例えば特許文献６参照）、水溶性のタンパク質を使う方法（例えば特許文献７参照）、ポリアクリル酸ナトリウムなどのアニオン性水溶性高分子やポリエチレングリコールなどの非イオン性水溶性高分子とポリ塩化アルミニウムなどの凝結剤を組み合わせる方法（例えば特許文献８参照）、硫酸アルミニウムとカチオン性重合体を組み合せて用いる方法（例えば特許文献９参照）、ベーマイトアルミナを用いる方法（例えば特許文献１０参照）などが提案されている。さらに近年、不揮発分を高くした塗料のハイソリッド化に対応して、ブース循環水に捕集された未塗着塗料をジアリルジメチルアンモニウムクロライド−アクリルアミド共重合体とアルミン酸ソーダによる処理する方法（例えば特許文献１１参照）も提示されている。しかし、未だに大量に用いられている低不揮発分油性塗料（塗料固形分濃度５０重量％に満たない低固形分濃度塗料）の不粘着化効果や処理コストに満足できる方法は得られていない。 In order to solve these problems, as a treatment of spray booth circulating water, a method using an alkaline agent such as sodium hydroxide (see, for example, Patent Document 1), an amphoteric metal salt such as zinc, iron, aluminum and hexamethylenediamine A method using an ethylene dichloride polymer and a polyamide-epichlorohydrin resin (for example, see Patent Document 2), a method using aluminum sulfate and a dimethylamino methacrylate sulfate- (meth) acrylamide copolymer (for example, Patent Document 3) A method using an aluminum salt and an amphoteric polymer (see, for example, Patent Document 4), a method using a melamine-aldehyde resin acid colloid (see, for example, Patent Document 5), and a method using a urea-melamine-aldehyde resin acid colloid. (For example, see Patent Document 6), use water-soluble protein Method (for example, see Patent Document 7), a method of combining an anionic water-soluble polymer such as sodium polyacrylate or a nonionic water-soluble polymer such as polyethylene glycol with a coagulant such as polyaluminum chloride (for example, see Patent Document 8). ), A method using a combination of aluminum sulfate and a cationic polymer (for example, see Patent Document 9), a method using boehmite alumina (for example, see Patent Document 10), and the like. Further, in recent years, a method for treating uncoated paint collected in booth circulating water with diallyldimethylammonium chloride-acrylamide copolymer and sodium aluminate in response to the high solidification of paint with a high nonvolatile content (for example, Patent Document 11) is also presented. However, there has not been obtained a method that can satisfy the non-adhesive effect and the processing cost of a low non-volatile oil-based paint (low solid content paint having a paint solid content concentration of less than 50% by weight) that is still used in large quantities.
本発明は、不揮発分が１０重量％以上、５０重量％未満である油性塗料を使用している湿式塗装ブースにおいて、当該油性塗料の未塗着塗料の不粘着化を改善し、未塗着塗料による関連設備の循環水の閉塞をなくし、塗装設備全般の操業効率の向上と経済性の向上および装置保全の向上を図ることにある。 In the wet coating booth using an oil-based paint having a non-volatile content of 10% by weight or more and less than 50% by weight, non-sticking of the non-coated paint of the oil-based paint is improved. It is intended to eliminate the blockage of the circulating water of the related equipment due to the improvement of the operation efficiency of the entire painting equipment, the economic efficiency and the maintenance of the equipment.
本発明者らは低不揮発分の油性塗料を使用している湿式塗装ブースにおける未塗着塗料の不粘着化について鋭意研究を重ねた結果、特定のカチオン性重合体が低不揮発分油性塗料の不粘着化に有効であることを見出し、この知見に基づいて本発明を完成するに至った。 As a result of intensive research on the non-adhesion of the unpainted paint in the wet painting booth using the low non-volatile oil-based paint, the present inventors have found that a specific cationic polymer has a low non-volatile oil-free paint. Based on this finding, the present invention has been completed.
すなわち、請求項１の発明は、不揮発分が１０重量％以上、５０重量％未満である油性塗料を使用している湿式塗装ブースにおいて、湿式塗装ブース循環水にジアリルジメチルアンモニウムクロライドとアクリルアミドを構成単位として含む共重合体を添加し、かつ該循環水のｐＨを６〜１０に調整することを特徴とする湿式塗装ブース循環水の処理方法である。 That is, the invention of claim 1 is a wet coating booth that uses an oil-based paint having a non-volatile content of 10% by weight or more and less than 50% by weight, and is composed of diallyldimethylammonium chloride and acrylamide in the wet coating booth circulating water. And a pH of the circulating water is adjusted to 6 to 10, and the wet coating booth circulating water is treated.
請求項２に係る発明は、請求項１記載の湿式塗装ブース循環水の処理方法であり、湿式塗装ブース循環水量に対する塗料負荷が５〜１００（ｍｇ／Ｌ−ブース循環水）であることを特徴とする。
The invention according to
請求項３に係る発明は、請求項１又は請求項２記載の湿式塗装ブース循環水の処理方法であり、油性塗料がアクリル樹脂系塗料であることを特徴とする。 The invention according to claim 3 is the method for treating wet paint booth circulating water according to claim 1 or claim 2, wherein the oil paint is an acrylic resin paint.
請求項４に係る発明は、請求項１又は請求項２記載の湿式塗装ブース循環水の処理方法であり、油性塗料がメタリック系塗料であることを特徴とする。
An invention according to claim 4 is the wet paint booth circulating water treatment method according to claim 1 or
請求項５に係る発明は、請求項１乃至請求項４記載の湿式塗装ブース循環水の処理方法であり、ジアリルジメチルアンモニウムクロライドとアクリルアミドを構成単位として含む共重合体が、ジアリルジメチルアンモニウムクロライドとアクリルアミドをモル比で９０：１０〜１０：９０で含むことを特徴とする。 The invention according to claim 5 is the wet coating booth circulating water treatment method according to claims 1 to 4, wherein the copolymer containing diallyldimethylammonium chloride and acrylamide as constituent units is diallyldimethylammonium chloride and acrylamide. In a molar ratio of 90:10 to 10:90.
本発明の方法により、不揮発分が１０重量％以上、５０重量％未満である油性塗料を使用する湿式塗装ブース循環水に捕集された塗料は効率よく不粘着化され、また塗料滓の固液分離に用いる遠心分離器内部への付着が大幅に減少する。これにより、従来よりもコストパフォーマンスに優れた未塗着塗料の不粘着化処理ができ、湿式塗装ブース及びその付帯装置の保全及び操業性向上に大きく寄与する。 By the method of the present invention, the paint collected in the wet paint booth circulating water using the oil-based paint having a non-volatile content of 10% by weight or more and less than 50% by weight is effectively non-tacky, and the solid-liquid of the paint cake Adhesion inside the centrifuge used for separation is greatly reduced. As a result, the non-coating treatment of the unpainted paint having better cost performance than before can be performed, which greatly contributes to the maintenance and operability improvement of the wet painting booth and its associated devices.
本発明の湿式塗装ブース循環水の処理方法は、不揮発分が１０重量％以上、５０重量％未満である油性塗料を使用する湿式塗装ブースにおいて、ブース循環水にジアリルジメチルアンモニウムクロライドとアクリルアミドを構成単位として含む共重合体を添加し、かつ該循環水のｐＨを６〜１０に調整して、未塗着塗料の不粘着化を行うものである。 The wet paint booth circulating water treatment method according to the present invention comprises diallyldimethylammonium chloride and acrylamide as constituent units in the booth circulating water in a wet paint booth using an oil-based paint having a nonvolatile content of 10% by weight or more and less than 50% by weight. In addition, the copolymer is added and the pH of the circulating water is adjusted to 6 to 10 to make the uncoated paint tack free.
本発明の対象とする湿式塗装ブースは、自動車、家庭電化製品、金属加工製品、金属製事務機器などの金属製品の塗装工程で使用される塗装吹きつけ工程での未塗着塗料を水で捕集する設備及びその付帯設備一式を含めた水による未塗着塗料捕集システムである。 The wet painting booth that is the subject of the present invention captures unpainted paint with water in the paint spraying process used in the painting process of metal products such as automobiles, home appliances, metal processed products, and metal office equipment. This is a system for collecting unpainted paint with water, including the equipment to be collected and a set of incidental equipment.
本発明で対象とする油性塗料（以下「油性塗料」とする。）は、メラミン樹脂系塗料、アクリル樹脂系塗料、アルキッド樹脂系塗料（アミノアルキッド樹脂を含む）、ポリエステル樹脂系塗料、ウレタン樹脂系塗料及びこれらの１種以上を含む油性塗料である。中でもアクリル樹脂系塗料に好適である。アクリル樹脂系塗料は、一般に上塗りクリア塗料として多用されている。また、油性塗料の不揮発分は１０重量％以上、５０重量％未満であり、中でも不揮発分が１５％以上、４０％未満の油性塗料が好適である。不揮発分が１５％以上、４０％未満の油性塗料の油性塗料としては、メタリック系塗料が挙げられる。 The oil-based paints (hereinafter referred to as “oil-based paints”) used in the present invention are melamine resin paints, acrylic resin paints, alkyd resin paints (including amino alkyd resins), polyester resin paints, urethane resin paints. A paint and an oil-based paint containing one or more of these. Among these, it is suitable for acrylic resin-based paints. Acrylic resin-based paints are commonly used as top coat clear paints. The non-volatile content of the oil-based paint is 10% by weight or more and less than 50% by weight, and among these, the oil-based paint having a non-volatile content of 15% or more and less than 40% is preferable. An example of the oil-based paint whose oil content is 15% or more and less than 40% is a metallic paint.
本発明におけるブース循環水の塗料負荷は、５〜１００（ｍｇ／Ｌ−ブース循環水量）であり、好ましくは１０〜７０（ｍｇ／Ｌ−ブース循環水量）である。ここで塗料負荷とは、湿式塗装ブース循環水：１Ｌによって捕集される塗布直後の未塗着油性塗料の重量（ｍｇ）を意味する。塗料負荷が１００（ｍｇ／Ｌ−ブース循環水量）を超える場合、本発明の効果が得られない場合がある。 The paint load of the booth circulating water in the present invention is 5 to 100 (mg / L-booth circulating water amount), preferably 10 to 70 (mg / L-booth circulating water amount). Here, the paint load means the weight (mg) of the uncoated oil-based paint immediately after application collected by 1 L of wet paint booth circulating water. When the paint load exceeds 100 (mg / L-booth circulating water amount), the effect of the present invention may not be obtained.
本発明のジアリルジメチルアンモニウムクロライドとアクリルアミドを構成単位として含む共重合体（以下、「ＤＡＤＭＡＣ−ＡＭ共重合体」とする。）は、ジアリルジメチルアンモニウムクロライド（ＤＡＤＭＡＣ）とアクリルアミド（ＡＭ）を共重合体の構成単位として含む重合体である。ジアリルジメチルアンモニウムクロライドが共重合体において１０〜９０モル％、好ましくはジアリルジメチルアンモニウムクロライドが２０〜８０モル％含有する共重合体である。また、アクリルアミドは共重合体において１０〜９０モル％、好ましくはアクリルアミドが２０〜８０モル％含有する共重合体である。ジアリルジメチルアンモニウムクロライド、アクリルアミドのモル％の範囲は、実績から見出されたものであり、この範囲以外であれば、本発明の効果を得ることができない。また、ＤＡＤＭＡＣ−ＡＭ共重合体中のジアリルジメチルアンモニウムクロライドとアクリルアミドの比率は、モル比で９０：１０〜１０：９０、好ましくは８０：２０〜８０：２０である。 The copolymer containing diallyldimethylammonium chloride and acrylamide as structural units (hereinafter referred to as “DADMAC-AM copolymer”) is a copolymer of diallyldimethylammonium chloride (DADMAC) and acrylamide (AM). It is a polymer containing as a structural unit. It is a copolymer containing 10 to 90 mol% of diallyldimethylammonium chloride, preferably 20 to 80 mol% of diallyldimethylammonium chloride in the copolymer. Acrylamide is a copolymer containing 10 to 90 mol%, preferably 20 to 80 mol% of acrylamide in the copolymer. The range of mol% of diallyldimethylammonium chloride and acrylamide has been found from actual results, and the effects of the present invention cannot be obtained unless the range is outside this range. The ratio of diallyldimethylammonium chloride and acrylamide in the DADMAC-AM copolymer is 90:10 to 10:90, preferably 80:20 to 80:20, in molar ratio.
また、ＤＡＤＭＡＣ−ＡＭ共重合体の分子量は、１０，０００〜１，０００，０００、好ましくは１００，０００〜５００，０００である。分子量が１０，０００未満では、未塗着塗料の不粘着化が十分でなく、本発明の効果を得ることができない。一方、分子量が１，０００，０００を超えては、未塗着塗料の不粘着化と未塗着塗料の凝集が同時に起こるために十分な未塗着塗料の不粘着化が得られない場合がある。 The molecular weight of the DADMAC-AM copolymer is 10,000 to 1,000,000, preferably 100,000 to 500,000. When the molecular weight is less than 10,000, the non-adhesive coating is not sufficiently tack-free and the effects of the present invention cannot be obtained. On the other hand, if the molecular weight exceeds 1,000,000, the non-coating of the unpainted paint and the cohesion of the non-coated paint occur at the same time. is there.
ＤＡＤＭＡＣ−ＡＭ共重合体の添加量は、塗布直後の未塗着油性塗料に対して、０．１〜２０重量％、好ましくは０．５〜１０重量％である。ＤＡＤＭＡＣ−ＡＭ共重合体の添加量が０．１重量％未満では、十分な不粘着化硬化が得られない。また、２０重量％を超えて添加しても添加量の増加に見合うだけの効果の向上が無く、経済的メリットが得られない場合がある。 The addition amount of the DADMAC-AM copolymer is 0.1 to 20% by weight, preferably 0.5 to 10% by weight, based on the uncoated oil-based paint immediately after coating. When the addition amount of the DADMAC-AM copolymer is less than 0.1% by weight, sufficient tack-free curing cannot be obtained. Moreover, even if it adds exceeding 20 weight%, there will be no improvement of the effect only corresponding to the increase in addition amount, and an economical merit may not be acquired.
従来、油性塗料の湿式塗装ブースにおいて、ジアリルジメチルアンモニウムクロライドとアクリルアミドを含む共重合体単独で油性塗料の不粘着化処理を行う方法が有効であることは知られていない。特に、不揮発分が１０重量％以上、５０重量％未満の油性塗料では、湿式塗装ブース循環水量に対する塗料負荷が５〜１００（ｍｇ／Ｌ−ブース循環水量）の範囲で、従来では予想し得ない優れたコストパフォーマンスを有する不粘着化効果を発揮し、未塗着塗料の処理を容易にするものである。 Conventionally, it has not been known that a method of tackifying an oil-based paint with a copolymer containing diallyldimethylammonium chloride and acrylamide alone is effective in a wet paint booth for oil-based paint. In particular, in the case of an oil-based paint having a nonvolatile content of 10% by weight or more and less than 50% by weight, the coating load with respect to the wet paint booth circulating water amount is in the range of 5 to 100 (mg / L-booth circulating water amount), which cannot be predicted conventionally. It exhibits a detackifying effect with excellent cost performance and facilitates the treatment of unpainted paint.
ＤＡＤＭＡＣ−ＡＭ共重合体の添加場所は、未塗着塗料を含む循環水中に処理剤が充分に分散される箇所であればよく特に限定されるものではないが、通常循環水の流れが良い箇所、例えば、循環ポンプの手前である。また、ＤＡＤＭＡＣ−ＡＭ共重合体の添加方法は、特に限定するものではないが水溶液にして、ポンプで連続添加あるいは間歇添加するなど適宜選択される。 The place where the DADMAC-AM copolymer is added is not particularly limited as long as the treatment agent is sufficiently dispersed in the circulating water including the unpainted paint, but is usually a place where the flow of the circulating water is good. For example, in front of the circulation pump. The method for adding the DADMAC-AM copolymer is not particularly limited, but is appropriately selected such that it is made into an aqueous solution and continuously added or intermittently added by a pump.
本発明における湿式塗装ブース循環水のｐＨは６〜１０である。湿式塗装ブース循環水のｐＨが６よりも低いと不粘着化効果が低下し、ｐＨが１０を超えると不粘着化効果の低下に加えて湿式塗装ブース循環水の発泡が増加する場合があり、好ましくない。ｐＨの調整には、塩酸、硫酸などの無機酸や水酸化ナトリウム、水酸化カリウムなどのアルカリ剤を適宜選択して調整される。 The pH of the wet paint booth circulating water in the present invention is 6-10. When the pH of the wet paint booth circulating water is lower than 6, the detackifying effect decreases, and when the pH exceeds 10, the foaming of the wet coating booth circulating water may increase in addition to the decrease of the tack free effect. It is not preferable. The pH is adjusted by appropriately selecting an inorganic acid such as hydrochloric acid or sulfuric acid or an alkali agent such as sodium hydroxide or potassium hydroxide.
本発明の効果に支障をきたさない範囲で他の湿式塗装ブース循環水処理剤を用いてもよく、これを何ら妨げるものではない。 Other wet coating booth circulating water treatment agents may be used as long as the effects of the present invention are not hindered, and this does not hinder this.
以下に実施例及び比較例により本発明を具体的に説明するが、本発明は以下の実施例に限定されるものではない。
〔ジアリルジメチルアンモニウムクロリド−アクリル酸アミド（ＤＡＤＭＡＣ−ＡＭ）共重合体〕
Ａ−１：ＤＡＤＭＡＣ−ＡＭ共重合体［ＤＡＤＭＡＣ：ＡＭ＝９０：１０（モル比)共重合体〔分子量：１００万、固形分８％〕
Ａ−２：ＤＡＤＭＡＣ−ＡＭ共重合体［ＤＡＤＭＡＣ：ＡＭ＝８０：２０（モル比)共重合体〔分子量：１００万、固形分１０％、ＳＮＦ社製、「Ｄ６０８０」（商品名）〕
Ａ−３：ＤＡＤＭＡＣ−ＡＭ共重合体［ＤＡＤＭＡＣ：ＡＭ＝７０：３０（モル比)共重合体〔分子量：１００万、固形分１０％、ＳＮＦ社製、「Ｄ６０７０」（商品名）〕
Ａ−４：ＤＡＤＭＡＣ−ＡＭ共重合体［ＤＡＤＭＡＣ：ＡＭ＝３０：７０（モル比)共重合体〔分子量：１００万、固形分８％、ＳＮＦ社製、「Ｄ６０３０」（商品名）〕
Ａ−５：ＤＡＤＭＡＣ−ＡＭ共重合体［ＤＡＤＭＡＣ：ＡＭ＝２０：８０（モル比)共重合体〔分子量：１００万、固形分１０％、ＳＮＦ社製、「Ｄ６０２０」（商品名）〕
Ａ−６：ＤＡＤＭＡＣ−ＡＭ共重合体［ＤＡＤＭＡＣ：ＡＭ＝１０:９０（モル比)共重合体〔分子量：１００万、固形分１０％：ＳＮＦ社製、「Ｄ６０１０」（商品名）〕
EXAMPLES The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited to the following examples.
[Diallyldimethylammonium chloride-acrylic acid amide (DADMAC-AM) copolymer]
A-1: DADMAC-AM copolymer [DADMAC: AM = 90: 10 (molar ratio) copolymer [molecular weight: 1 million, solid content: 8%]
A-2: DADMAC-AM copolymer [DADMAC: AM = 80: 20 (molar ratio) copolymer [molecular weight: 1 million, solid content: 10%, manufactured by SNF, “D6080” (trade name)]
A-3: DADMAC-AM copolymer [DADMAC: AM = 70: 30 (molar ratio) copolymer [molecular weight: 1 million, solid content: 10%, manufactured by SNF, “D6070” (trade name)]
A-4: DADMAC-AM copolymer [DADMAC: AM = 30: 70 (molar ratio) copolymer [Molecular weight: 1 million, solid content: 8%, manufactured by SNF, “D6030” (trade name)]
A-5: DADMAC-AM copolymer [DADMAC: AM = 20: 80 (molar ratio) copolymer [Molecular weight: 1 million, solid content: 10%, "S6020" (trade name)]
A-6: DADMAC-AM copolymer [DADMAC: AM = 10: 90 (molar ratio) copolymer [molecular weight: 1,000,000, solid content: 10%: “D6010” (trade name) manufactured by SNF Corporation]
〔本発明以外のカチオン性重合体〕
Ｂ−１：ポリジアリルジメチルアンモニウムクロライド（ＤＡＤＭＡＣ）（固形分２０％、分子量７０万）〔「ＰＲＰ４５２０」（商品名）、ＳＮＦ社製〕
Ｂ−２：ポリアクリルアミド（分子量６００万）〔「ダイヤフロックＮＰ−８００Ｌ」（商品名）、ダイヤフロック（株）製〕
Ｂ−３：ポリエチレンイミン（固形分：３０％、分子量７万）〔「エポミンＰ−１０００」（商品名）、日本触媒（株）製〕
Ｂ−４：ジメチルアミン−エピクロルヒドリン縮合物（固形分５０、分子量５万）〔旭電化工業（株）製〕
Ｂ−５：ジメチルアミン−ジメチルアミン-エピクロルヒドリン−アンモニア縮合物（固形分４５％、分子量８万）〔旭電化工業（株）製〕
Ｂ−６：ジメチルアミノエチルメタクリレート硫酸塩−アクリルアミド共重合物（分子量３００万）〔「スミフロックＦＣ−２５０Ｇ」（商品名）、住友化学工業（株）製〕
Ｂ−７：ジメチルアミノエチルメタクリレート硫酸塩−アクリル酸−アクリルアミド共重合物（分子量５５０万）〔「アロンフロックＣＸ−１００」（商品名）、東亜合成（株）製〕
[Cationic polymer other than the present invention]
B-1: Polydiallyldimethylammonium chloride (DADMAC) (solid content 20%, molecular weight 700,000) ["PRP4520" (trade name), manufactured by SNF]
B-2: Polyacrylamide (molecular weight: 6 million) ["Diafloc NP-800L" (trade name), manufactured by Diafloc Co., Ltd.]
B-3: Polyethyleneimine (solid content: 30%, molecular weight 70,000) ["Epomin P-1000" (trade name), manufactured by Nippon Shokubai Co., Ltd.]
B-4: Dimethylamine-epichlorohydrin condensate (solid content 50, molecular weight 50,000) [Asahi Denka Kogyo Co., Ltd.]
B-5: Dimethylamine-dimethylamine-epichlorohydrin-ammonia condensate (solid content 45%, molecular weight 80,000) [manufactured by Asahi Denka Kogyo Co., Ltd.]
B-6: Dimethylaminoethyl methacrylate sulfate-acrylamide copolymer (molecular weight: 3 million) ["Sumifloc FC-250G" (trade name), manufactured by Sumitomo Chemical Co., Ltd.]
B-7: Dimethylaminoethyl methacrylate sulfate-acrylic acid-acrylamide copolymer (molecular weight 5.5 million) ["Aron Flock CX-100" (trade name), manufactured by Toa Gosei Co., Ltd.]
〔その他処理剤〕
Ｃ−１：アルミン酸ナトリウム（Ａｌとして１０．６％含有）〔「ＳＡ−２０１９」（商品名）、昭和軽金属（株）製〕
Ｃ−２：ポリ塩化アルミニウム溶液（Ａｌとして５．８％含有）〔住友化学工業（株）製〕
Ｃ−３：硫酸バンド溶液（Ａｌとして４．２％含有）〔住友化学工業（株）製〕
Ｃ−４：硝酸アルミニウム〔和光純薬（株）製試薬〕
Ｃ−５：メラミン−ホルムアルデヒド樹脂酸コロイド〔メラミン：ホルムアルデヒド＝１：２．１９（重量比）のメチロール化メラミン１００ｇを１．３５％の塩酸溶液１Ｌ中に攪拌下、添加して酸コロイドを作成した。〕
Ｃ−６：カゼインナトリウム〔関東化学（株）試薬〕
[Other treatment agents]
C-1: Sodium aluminate (containing 10.6% as Al) ["SA-2019" (trade name), manufactured by Showa Light Metal Co., Ltd.]
C-2: Polyaluminum chloride solution (containing 5.8% as Al) [manufactured by Sumitomo Chemical Co., Ltd.]
C-3: Sulfate band solution (containing 4.2% as Al) [manufactured by Sumitomo Chemical Co., Ltd.]
C-4: Aluminum nitrate [Reagent manufactured by Wako Pure Chemical Industries, Ltd.]
C-5: Melamine-formaldehyde resin acid colloid [melamine: formaldehyde = 1: 2.19 (weight ratio) 100 g of methylolated melamine is added to 1 L of 1.35% hydrochloric acid solution with stirring to form an acid colloid did. ]
C-6: Sodium caseinate [Reagent of Kanto Chemical Co., Inc.]
（塗料不粘着化試験）
図１に示した試験装置（保有水量は１００リットル、循環水量は５０リットル／分）を用いて試験を行った。市水１００Ｌを循環水ピット１に入れ、ＤＡＤＭＡＣ−ＡＭ共重合体（Ａ−１）を７５ｇ添加し、循環ポンプ３を作動させて水を循環させ、ＤＡＤＭＡＣ−ＡＭ共重合体（Ａ−１）均一に溶解させた。希塩酸あるいは希水酸化ナトリウム水溶液でＤＡＤＭＡＣ−ＡＭ共重合体（Ａ−１）水溶液のｐＨを７．５に調製し、塗料不粘着化試験用の循環水２とした。循環水２を５０Ｌ／分で循環させながら、スプレーガン６と圧縮空気８を用いて油性塗料〔機械部品用アミノアルキッド樹脂系焼き付け油性塗料、日本ペイント（株）製、「オルガセレクト１００スーパーホワイト」（商品名）、不揮発分４０％〕７を塗料捕集部５に向けて２０分間で６０ｇをスプレー塗布した。スプレー終了後、浮上分離した塗料滓９を取り出し、指触にて不粘着化効果を判定した。指触による不粘着化の判定は、「○：不粘着化良好」、「×：不粘着化不良」とした。同様にして、種々のＤＡＤＭＡＣ−ＡＭ共重合体及びその他の処理剤を用いて塗料不粘着化試験を行った。その結果を表１に示した。
(Paint detackification test)
The test was performed using the test apparatus shown in FIG. 1 (the amount of retained water is 100 liters and the amount of circulating water is 50 liters / minute). 100L of city water is put in the circulating water pit 1, 75 g of DADMAC-AM copolymer (A-1) is added, the circulation pump 3 is operated to circulate water, and the DADMAC-AM copolymer (A-1) It was dissolved uniformly. The pH of the DADMAC-AM copolymer (A-1) aqueous solution was adjusted to 7.5 with dilute hydrochloric acid or dilute sodium hydroxide aqueous solution, and used as circulating
低不揮発分（４０％）油性塗料を使用する湿式塗装ブースにおいて、本発明のＤＡＤＭＡＣ−ＡＭ系共重合体によりブース循環水中の未塗着塗料は不粘着化され、浮上分離あるいは遠心分離などにより該不粘着化された塗料滓の固液分離が容易となり、更に分離した水は循環して再度使用が可能となる。 In a wet painting booth using a low non-volatile content (40%) oil-based paint, the uncoated paint in the booth circulating water is made non-tacky by the DADMAC-AM copolymer of the present invention, and the paint is floated or centrifuged. Solid-liquid separation of the non-tacked paint cake becomes easy, and the separated water can be circulated and used again.
１：循環水ピット
２：循環水
３：循環ポンプ
４：循環水配管
５：塗料捕集部
６：スプレーガン
７：塗料
８：圧縮空気
９：塗料滓
1: Circulating water pit 2: Circulating water 3: Circulating pump 4: Circulating water piping 5: Paint collecting part 6: Spray gun 7: Paint 8: Compressed air 9: Paint bottle
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006311662A JP2008126109A (en) | 2006-11-17 | 2006-11-17 | Treatment method of circulating water of wet coating booth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006311662A JP2008126109A (en) | 2006-11-17 | 2006-11-17 | Treatment method of circulating water of wet coating booth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2008126109A true JP2008126109A (en) | 2008-06-05 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2006311662A Pending JP2008126109A (en) | 2006-11-17 | 2006-11-17 | Treatment method of circulating water of wet coating booth |
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| Country | Link |
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| JP (1) | JP2008126109A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009240928A (en) * | 2008-03-31 | 2009-10-22 | Hakuto Co Ltd | Method of treating circulating water for the wet coating booth |
| CN103359812A (en) * | 2012-04-06 | 2013-10-23 | 成都环川科技有限公司 | Efficient spray processing method for spray room |
| CN105236533A (en) * | 2015-09-30 | 2016-01-13 | 成都环川科技有限公司 | High efficient paint mist processing agent for spray booth |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63310695A (en) * | 1987-05-26 | 1988-12-19 | カルゴン コーポレーション | Method of removing viscosity of spray coating waste by melamine formaldehyde |
| JP2001212571A (en) * | 2000-02-04 | 2001-08-07 | Hakuto Co Ltd | Method for treating circulating water of wet coating booth |
-
2006
- 2006-11-17 JP JP2006311662A patent/JP2008126109A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63310695A (en) * | 1987-05-26 | 1988-12-19 | カルゴン コーポレーション | Method of removing viscosity of spray coating waste by melamine formaldehyde |
| JP2001212571A (en) * | 2000-02-04 | 2001-08-07 | Hakuto Co Ltd | Method for treating circulating water of wet coating booth |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009240928A (en) * | 2008-03-31 | 2009-10-22 | Hakuto Co Ltd | Method of treating circulating water for the wet coating booth |
| CN103359812A (en) * | 2012-04-06 | 2013-10-23 | 成都环川科技有限公司 | Efficient spray processing method for spray room |
| CN105236533A (en) * | 2015-09-30 | 2016-01-13 | 成都环川科技有限公司 | High efficient paint mist processing agent for spray booth |
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