WO2015145479A1 - 湿式塗装ブース循環水処理剤及び処理方法 - Google Patents

湿式塗装ブース循環水処理剤及び処理方法 Download PDF

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Publication number
WO2015145479A1
WO2015145479A1 PCT/JP2014/001669 JP2014001669W WO2015145479A1 WO 2015145479 A1 WO2015145479 A1 WO 2015145479A1 JP 2014001669 W JP2014001669 W JP 2014001669W WO 2015145479 A1 WO2015145479 A1 WO 2015145479A1
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Prior art keywords
paint
circulating water
booth
booth circulating
water
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PCT/JP2014/001669
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English (en)
French (fr)
Japanese (ja)
Inventor
伊藤　仁
舟一 牛場
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伯東株式会社
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Application filed by 伯東株式会社 filed Critical 伯東株式会社
Priority to KR1020187025308A priority Critical patent/KR20180100719A/ko
Priority to KR1020167021733A priority patent/KR20160106168A/ko
Priority to PCT/JP2014/001669 priority patent/WO2015145479A1/ja
Priority to JP2016509606A priority patent/JP6120470B2/ja
Priority to CN201480077140.7A priority patent/CN106458639A/zh
Publication of WO2015145479A1 publication Critical patent/WO2015145479A1/ja

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
    • A01N37/52—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing groups, e.g. carboxylic acid amidines
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/14—Paint wastes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/02—Odour removal or prevention of malodour

Definitions

  • the present invention relates to a treatment agent and a treatment method for circulating water in a wet painting booth. More specifically, the present invention relates to a treatment agent and a treatment method for wet paint booth circulating water containing a specific ⁇ -chlorobenzaldoxime compound, which exhibits an excellent effect in preventing bad smell and clarification of the wet paint booth circulating water.
  • This wet painting booth has a painting chamber for spraying paint on an object to be coated, a duct having a fan for sucking air in the painting chamber, and a contact portion for bringing the sucked air and the booth circulating water into contact with each other. And a pit capable of storing booth circulating water.
  • uncoated paint that has not been applied to the object to be coated is sucked into the duct together with air by the fan.
  • the uncoated paint is collected in contact with the booth circulating water at the contact portion, and separated by settling or floating the uncoated paint. The uncoated paint thus separated is collected and discarded.
  • a part of the unpainted paint floats and circulates in the booth circulating water without being separated, and adheres to the inner surface of the piping and reduces the circulating water volume of the booth circulating water. Furthermore, if the amount of circulating water is drastically reduced, the painting operation may even have to be stopped. In order to prevent such problems, a paint treatment agent is added to the booth circulating water in advance to detack the unpainted paint floating in the booth circulating water and facilitate solid-liquid separation. Yes.
  • paint treating agents include oil-based paints such as alkaline agents such as caustic soda, cationic polymers, inorganic flocculants, and melamine-aldehyde resin acid colloids (see Patent Document 1).
  • alkaline agent saponifies the surface of the uncoated oil-based paint to make it non-tacky, thereby preventing the non-coated oil-based paint from adhering to the pipe.
  • the cationic polymer, the inorganic flocculant and the melamine-aldehyde resin acid colloid adhere to the surface of the uncoated paint and become non-tacky to facilitate solid-liquid separation.
  • a paint treatment agent containing polyethyleneimine as a component for uncoated water-based paints, a paint treatment agent containing polyethyleneimine as a component (see Patent Document 2) or a paint treatment agent containing a cationic organic compound and an anionic organic compound (see Patent Document 3). Etc. are used. These paint treatment agents facilitate solid-liquid separation of uncoated water-based paints that are uniformly dispersed or dissolved in Booth circulating water.
  • the operating system of the painting booth such as a booth and a painting booth that uses a mixture of water-based paint and oil-based paint, has become complex and diverse, and along with this, paint components and solvent components that dissolve or disperse in the booth circulating water are also increasing. Because of increasing complexity and increasing, new problems have arisen due to this situation.
  • the first of these new problems is the worsening of bad odor
  • the second is the increase in the concentration of turbid components.
  • the concentration and increase of turbid components in the booth circulation water promote the generation of insect pests such as butterflies and chironomids, leading to deterioration of the working environment and an increase in painting defects.
  • Patent Document 4 a paint treatment agent containing hexahydro-1,3,5-tris (2-hydroxyethyl) -S-triazine as a bactericidal agent (see Patent Document 4) and a paint treatment containing a tetraalkylphosphonium salt An agent (see Patent Document 5) has been proposed, and the use of ozone (see Patent Document 6) has been proposed.
  • JP-A-8-323255 Japanese Patent Publication No. 6-2259 JP-A-61-74607 JP-A 63-42706 Japanese Unexamined Patent Publication No. 6-31281 JP 2007-238537 A JP-A-8-323255
  • the present invention has been made in view of the above-mentioned conventional circumstances, and the recent significant increase in the use of water-based paints, the complexity of the operation mode of paint booths, It is an object to be solved to provide a wet coating booth treatment agent and a treatment method that can cope with a high concentration of turbid components.
  • the present inventors have intensively studied, and as a result, the specific ⁇ -chlorobenzaldoxime compound has an excellent effect of preventing the bad odor of the wet paint booth circulating water. It has been found that it has the effect of clarifying by removing turbid components from the paint booth circulating water, and this specific ⁇ -chlorobenzaldoxime compound can be used in oil paints alone, water paints alone, water paints and oil paints.
  • the present invention has been completed by confirming that the above-mentioned effects can be stably exhibited even in coating booths of different operation modes that are mixed and used.
  • ⁇ -chlorobenzaldoxime compounds are generally used as water-based disinfectants
  • the present inventors have determined that specific ⁇ -chlorobenzaldoxime compounds used in the present invention can be used under the condition of using an oil-based paint alone.
  • the odor prevention effect could be expected, a stable odor prevention effect was obtained even under the condition of using a water-based paint alone and under the condition of using a mixture of a water-based paint and an oil-based paint. It was impossible to predict the effect of clarifying by removing the quality component.
  • the present invention relates to a wet paint booth circulating water treatment agent characterized by containing an ⁇ -chlorobenzaldoxime compound represented by the following general formula (1).
  • R 1 represents a hydrogen atom or a chlorine atom
  • R 2 represents a hydrogen atom or an acetyl group.
  • the present invention provides a wet paint booth circulating water treatment agent in which the compound represented by the general formula (1) is ⁇ -chloro-p-chlorobenzaldoxime.
  • the present invention is sensitive to a wet paint booth circulating water treatment method characterized by adding an ⁇ -chlorobenzaldoxime compound represented by the following general formula (1) to wet paint booth circulating water.
  • R 1 represents a hydrogen atom or a chlorine atom
  • R 2 represents a hydrogen atom or an acetyl group.
  • the present invention is characterized in that the ⁇ -chlorobenzaldoxime compound represented by the general formula (1) is added so that the concentration in the wet paint booth circulating water is 0.1 to 100 mg / L.
  • a wet paint booth circulating water treatment method is provided.
  • the present invention also provides a wet paint booth circulating water treatment method in which the ⁇ -chlorobenzaldoxime compound represented by the general formula (1) is ⁇ -chloro-p-chlorobenzaldoxime. .
  • wet coating booth there are no particular restrictions on the type of wet coating booth to be treated by the wet coating booth circulating water treatment agent and processing method of the present invention, water curtain type, venturi type, no pump type and variations of these types, as well as these types It also includes a painting booth where various incidental facilities are connected to the painting booth.
  • the oil-based paint to be treated is not particularly limited.
  • epoxy resin paint, polyester resin paint, urethane resin paint, alkyd resin paint, amino resin paint examples include vinyl resin paints, acrylic resin paints, phenol resin paints, cellulose derivative paints, and alcoholic paints.
  • the water-based paint to be treated is not particularly limited, and examples thereof include a water-based alkyd resin paint, a water-based polyester resin paint, a water-based acrylic resin paint, and a water-based polyurethane resin paint.
  • the usage form of the paint in the wet paint booth to be treated by the wet paint booth circulating water treatment agent and treatment method of the present invention, the oil paint alone use, the water paint alone use, and the water paint and oil paint
  • the present invention can be applied to any use booth of mixed use.
  • ⁇ -chlorobenzaldoxime compounds used in the wet coating booth circulating water treatment agent and treatment method of the present invention include, for example, ⁇ -chlorobenzaldoxime, ⁇ -chloro-p-chlorobenzaldoxime, ⁇ - Examples thereof include chloro-benzaldoxime acetate and ⁇ -chloro-p-chlorobenzaldoxime acetate. Among them, ⁇ -chloro-p-chlorobenzaldoxime is preferable in terms of the clarification effect.
  • the wet coating booth circulating water treatment agent of the present invention has a specific ⁇ -chlorobenzaldoxime compound, which is an active ingredient, which is hardly soluble in water.
  • Hydrophilic solvents include alcohols such as methanol and ethanol, glycols such as ethylene glycol, propylene glycol, diethylene glycol and dipropylene glycol, methyl cellosolve, phenyl cellosolve, diethylene glycol monomethyl ether, dipropylene glycol monoethyl ether, and tripropylene glycol.
  • Glycol ethers such as monomethyl ether, alcohols having up to 8 carbon atoms or methyl acetate, ethyl acetate, 3-methoxydibutyl acetate, esters such as 2-ethoxymethyl acetate, 2-ethoxyethyl acetate, propylene carbonate, dimethylformamide, etc.
  • amides Of the amides.
  • a specific ⁇ -chlorobenzaldoxime compound as an active ingredient is dispersed in water using a cationic surfactant, an anionic surfactant, a nonionic surfactant or an amphoteric surfactant.
  • nonionic surfactants are preferred, higher alcohol ethylene oxide adducts, alkylphenol ethylene oxide adducts, fatty acid ethylene oxide adducts, polyhydric alcohol fatty acid ester ethylene oxide adducts, higher alkylamine ethylene oxides.
  • Examples include adducts, ethylene oxide adducts of fatty acid amides, fatty acid esters of glycerin, fatty acid esters of pentaerythritol, fatty acid esters of sorbitol and sorbitan, fatty acid esters of sucrose, alkyl ethers of polyhydric alcohols, alkylolamides, and the like.
  • the place for adding the wet paint booth circulating water treatment agent of the present invention in the wet paint booth is not particularly limited, but may be any place where the treating agent is easily mixed in the booth circulating water, and is preferably in front of the circulation pump.
  • the addition method is not particularly limited, but can be appropriately selected such as continuous addition with a metering pump or intermittent addition.
  • the amount of the wet coating booth circulating water treatment agent of the present invention varies depending on the type of coating booth to be treated, the paint used, the operating conditions, etc., but usually a specific ⁇ -chlorobenzaldoxime is added to the booth circulating water.
  • the concentration of the compound is 0.1 to 100 mg / L, preferably 1 to 20 mg / L. When the amount is less than 0.1 mg / L, sufficient malodor prevention and clarification effects may not be obtained. When the amount is more than 100 mg / L, the obtained effect is sufficient. In some cases, the effect corresponding to the increase cannot be obtained, which is not preferable from an economic viewpoint.
  • the wet paint booth circulating water treatment agent of the present invention may contain other known components as long as the effects of the present invention are not impaired.
  • other known components include viscosity modifiers, antifoaming agents, and bactericides that contribute to the stability of the preparation.
  • the wet painting booth circulating water treatment method of the present invention is a wet painting booth circulating water treatment method characterized by adding a specific ⁇ -chlorobenzaldoxime compound to the wet painting booth circulating water,
  • the coating booth circulating water treatment agent containing the specific ⁇ -chlorobenzaldoxime compound may be used, or the specific ⁇ -chlorobenzaldoxime compound may be added directly to the wet coating booth circulating water.
  • paint treating agents such as paint detackifying agents, cationic coagulants, and flocculants, which have been conventionally used as treatment agents for wet paint booths, and known dissipators.
  • a foaming agent, a disinfectant, etc. can be used together.
  • paint tackifiers include sodium hydroxide, sodium silicate, sodium zincate, alumina sol, silica sol, sodium aluminate, polyaluminum chloride, aluminum sulfate, ferric chloride, polyferric sulfate, melamine- Formaldehyde condensate, phenol-formaldehyde condensate, bentonite, sepiolite, higher alcohol or derivative thereof, higher fatty acid or derivative thereof, polyethylene wax or derivative thereof, paraffin wax or derivative thereof, polystyrene or derivative thereof, polyvinyl alcohol or derivative thereof, diallyl Examples thereof include dimethylammonium chloride-acrylamide copolymer.
  • alumina sol sodium aluminate, polyaluminum chloride, aluminum sulfate, melamine-formaldehyde condensate, phenol-formaldehyde condensate, higher fatty acids or derivatives thereof, polyethylene wax or derivatives thereof supplement the non-adhesive effect and the clarification effect. It is preferable in terms of effect.
  • cationic coagulants include (meth) acrylic acid esters (esters of alcohols having 1 to 4 carbon atoms) / (meth) acrylaminoethyltrimethylammonium copolymer, (meth) acrylamide / (meth) acrylaminoethyltrimethylammonium Copolymer, (meth) acrylaminodialkyl (alkyl group having 1 to 4 carbon atoms) / (meth) acrylaminoethyltrimethylammonium copolymer, (meth) acrylaminoethyl such as poly (meth) acrylaminoethyltrimethylammonium Trimethylammonium copolymer; Dicyandiamide condensate such as dicyandiamide-formaldehyde condensate, dicyandiamide-diethylenetriamine condensate; dimethylamine-epichlorohydrin condensate, diethylamine-epich
  • the molecular weight of the cationic coagulant is not particularly limited, but is preferably in the range of 2,000 to 500,000. This is because if the molecular weight is within this range, the setting effect of the aqueous paint is particularly excellent.
  • the flocculant is a water-soluble anionic, cationic or nonionic polymer having a molecular weight of 1,500,000 to 20,000,000, preferably 2,000,000 to 15,000,000. It is a polymer.
  • the flocculant has an effect of further facilitating the recovery by cross-linking and coarsening the paint particles solidified and solidified by coagulation and non-adhesion with a paint non-tackifier and / or a cationic coagulant.
  • the flocculant examples include polyacrylamide, acrylamide-acrylic acid copolymer, acrylamide-acrylaminoethyltrimethylammonium chloride copolymer, acrylamide-methacrylaminoethyltrimethylammonium chloride copolymer, acrylamide- [2- (acryloyloxy) And ethyl] benzyldimethylammonium chloride / [2- (acryloyloxy) ethyl] trimethylammonium copolymer, acrylamide-vinyl sulfonic acid copolymer and salts thereof, polyvinyl imidazoline, and polyethylene oxide.
  • polyacrylamide polyacrylamide, acrylamide-acrylic acid copolymer, acrylamide-acrylaminoethyltrimethylammonium chloride copolymer, acrylamide-methacrylaminoethyltrimethylammonium chloride copolymer, acrylamide- [2- (acryloyloxy) ethyl] A benzyldimethylammonium chloride / [2- (acryloyloxy) ethyl] trimethylammonium copolymer is preferred.
  • the paint detackifier and flocculant can be used in booths that use either oil paint alone, water paint alone, or mixed use of water paint and oil paint.
  • the addition method and the addition amount can be selected as appropriate in combination with the kind of the drug.
  • the cationic coagulant is mainly used in a booth in the form of a single use of an aqueous paint or a mixed use of an aqueous paint and an oil paint, and it is also preferable to control the addition amount of the cationic coagulant by the amount of charge in the booth circulating water.
  • the amount of charge in the booth circulating water varies greatly depending on the amount of cationic coagulant added. If the amount of charge in the booth circulating water is -200 to +200 ⁇ eq / L, the paint particles can be easily separated from the water and recovered. It becomes extremely easy.
  • the amount of cationic coagulant added is controlled by the amount of charge in Booth circulating water, it can be measured by methods such as colloid titration, particle charge measurement (PCD method), electrophoresis, etc., and these methods are known. The detailed description thereof is omitted.
  • antifoaming agent and disinfectant used in the wet paint booth circulating water general known antifoaming agents and disinfectants used in water systems such as process water and waste water in various industries can be applied.
  • the coating agent, the antifoaming agent, the disinfectant, etc. are applied in the conventional manner regardless of the application of the specific ⁇ -chlorobenzaldoxime compound of the present invention. Can be used.
  • the test wet coating booth shown in FIG. 1 was used.
  • This booth simulates a general large-scale wet painting booth, and includes a painting chamber 1, a circulating water pit 2, and a concentration collection tank 3.
  • the paint 4 is sprayed in the painting chamber 1, and the uncoated paint is collected in contact with the booth circulating water 6 supplied to the painting chamber 1 at the contact portion 5 and flows down to the circulating water pit 2.
  • this test wet coating booth there is no object to be coated, and all the sprayed paint becomes uncoated paint.
  • the unpainted paint collected in the booth circulating water 6 at the contact portion 5 floats and separates in the form of sludge in the circulating water pit 2 and is sucked together with the booth circulating water by the concentrated recovery tank feed pump 7 to the concentrated recovery tank 3.
  • the concentration and recovery tank 3 the sludge of the uncoated paint is concentrated by the pressure floating action, and the concentrated sludge 8 is recovered and carried out of the system.
  • the treated water 9 separated from the sludge in the concentration recovery tank 3 returns to the circulating water pit 2.
  • the booth circulating water stored in the circulating water pit 2 is sent to the painting chamber as the booth circulating water 6 by the circulation pump 10. 11, 12, and 13 are the addition positions of the chemicals in Examples and Comparative Examples.
  • the treatment agent and the cationic coagulant of the present invention are added, and in the addition position 12, the coating tackifier is added and added.
  • a flocculant is added.
  • the test wet coating booth has 500L of water, the circulating water volume of the booth circulating water by the circulation pump 10 is 100L / min, and the water supply volume to the concentration recovery tank 3 by the concentration recovery tank feed pump 7 is 30L / min. All examples and comparative examples were tested under the conditions.
  • A-1 Agent prepared by dissolving 2 parts by weight of ⁇ -chloro-p-chlorobenzaldoxime in 98 parts by weight of diethylene glycol (treatment agent of the present invention )
  • A-2 Agent prepared by dissolving 2 parts by weight of ⁇ -chlorobenzaldoxime in 98 parts by weight of diethylene glycol (the treatment agent of the present invention)
  • A-4 A drug prepared by dissolving 2 parts by weight of hexahydro-1,3,5-tris (2-hydroxyethyl) -S-triazine and 5 parts by weight of sodium hydroxide in 93 parts by weight of pure water (known in the art) Odor control agent)
  • A-5 Drug prepared by dissolving 2 parts by weight
  • Cationic coagulant C-1 Dimethylamine-epichlorohydrin condensate [“Wastex T-101-50” manufactured by Nagase & Co., Ltd.]
  • C-2 Polyethyleneimine [“Epomin P-1000” manufactured by Nippon Shokubai Co., Ltd.]
  • C-3 diallyldimethylammonium chloride-acrylamide copolymer [“Senka Flock DC-7513” manufactured by SENKA Co., Ltd.]
  • D Flocculant D-1: Acrylamide-acrylaminoethyltrimethylammonium chloride copolymer [“Aron Flock 3390” manufactured by MT Aquapolymer Co., Ltd.]
  • D-2 Acrylamide-acrylic acid copolymer [“Acofloc 2360” manufactured by MT Aquapolymer Co., Ltd.]
  • the circulating pump 10 circulates the booth circulating water at 100 L / min, and the concentrated recovery tank feed pump 7 concentrates and collects the booth circulating water.
  • Water is fed to the tank 3 at 30 L / min, and the turbidity in the circulating water is concentrated in the concentration and recovery tank 3 by the pressure floating action, and the concentrated sludge 8 is recovered and carried out of the system.
  • A-1 as a treating agent of the present invention was added once a day from the addition site 11 so that the active ingredient was 10 mg / L with respect to the booth circulating water. In this test, the paint was not sprayed, and no chemicals other than the treatment agent of the present invention were added.
  • Comparative Example 1 In Comparative Example 1, the drug to be added was changed from A-1 instead of A-1, and was added once a day from the addition site 11 so that the active ingredient was 10 mg / L with respect to the booth circulating water. The test was performed in the same manner as in Example 1 except that.
  • Comparative Example 2 In Comparative Example 2, the drug to be added is changed from A-1 to A-5 once a day so as to be 10 mg / L of the booth circulating water as an active ingredient instead of A-1. The test was performed in the same manner as in Example 1 except that.
  • Comparative Example 3 In Comparative Example 3, the test was performed in the same manner as in Example 1 without adding the treatment agent of the present invention and without adding other chemicals. In other words, this is an example of no processing.
  • Table 1 shows the turbidity measurement results and the odor intensity determination results of the booth circulating water after completion of the tests of Example 1 and Comparative Examples 1 to 3.
  • the wet paint booth circulating water treatment agent containing the specific ⁇ -chlorobenzaldoxime compound of the present invention is superior in the odor prevention effect as compared with the conventionally known odor prevention agents.
  • Booth circulating water treatment test (1) (water paint and oil paint mixing conditions) (Example 2) 500 L of fresh water is introduced into the circulating water pit 2 of the test wet coating booth shown in FIG. 1, the booth circulating water is circulated at 100 L / min by the circulation pump 10, and the concentration recovery tank feed pump 7 moves to the concentration recovery tank 3. Water is fed at a rate of 30 L / min, turbidity in the circulating water is concentrated in the concentration and recovery tank 3 by the pressurized floating action, and the concentrated sludge 8 is recovered and carried out of the system. While adding the additive agent shown in Example 2 of Table 3 to this system in the addition amount shown in Example 2 of Table 3, each of the aqueous paint and the oil paint is directed toward the booth circulating water in the coating chamber 1.
  • Spraying was continued for 5 hours a day at 5 g / min.
  • a water-based top coat for automobiles manufactured by Nippon Paint Co., Ltd.
  • a solvent clear paint for automobiles manufactured by Nippon Paint Co., Ltd.
  • the additive A-1 which is the treatment agent of the present invention was added from the addition site 11 once a day so as to be 10 mg / L as an active ingredient with respect to the booth circulating water.
  • the additive C-1 was added at 1 part by weight as an active ingredient from the addition site 11 during spraying with respect to the weight of the water-based paint sprayed at the coating booth.
  • the charge of the booth circulating water was measured, and a cationic coagulant was added so that the charge was -200 to +200 ( ⁇ eq / L-booth circulating water).
  • the amount of the cationic coagulant added in the booth circulating water within a predetermined charge range is confirmed in advance by a preliminary test, and the amount of the cationic coagulant shown in Table 3 is determined.
  • the charge of the booth circulating water was measured by colloid titration. About the water
  • Examples 3 to 13, Comparative Examples 4 to 6 In Examples 3 to 13 and Comparative Examples 4 to 6, Examples were added except that the additive agents shown in each Example and each Comparative Example in Table 3 were added in the addition amounts shown in each Example and each Comparative Example in Table 3.
  • the treatment test (1) of the booth circulating water was conducted in the same manner as 2 and the test results were obtained.
  • Comparative Example 7 In Comparative Example 7, the treatment test (1) of the booth circulating water was performed without adding the chemical, and the test result was obtained. In other words, this is an example of no processing.
  • Table 3 shows the turbidity measurement results and odor intensity determination results of the booth circulating water after the tests of Examples 2 to 13 and Comparative Examples 4 to 7, and the average value of the booth circulating water charge during the test.
  • Addition amount indicates mg / L vs. amount of water retained in circulating water
  • drugs B and D indicate% by weight with respect to total paint weight
  • drug C indicates% by weight with respect to water-based paint weight.
  • the booth circulating water has a charge of ⁇ 200 to +200 ( ⁇ eq / L ⁇ In Examples 2 to 13 in which the addition amount of the cationic coagulant was adjusted so that the booth circulated water), an excellent effect with a turbidity of 110 degrees or less and an odor intensity of 2 or less was exhibited.
  • Comparative Example 4 the treatment agent of the present invention was not added, and the paint detackifying agent, the cationic coagulant and the flocculant were added to adjust the booth circulating water charge to an appropriate range.
  • the turbidity is as high as 285 degrees, and the odor intensity is as high as 3-4. It is clear that the booth circulating water is not sufficiently clear and smells.
  • Comparative Example 5 or Comparative Example 6 the charge of Booth circulating water is adjusted to an appropriate range by adding a conventionally known malodor prevention agent, a coating tackifier, a cationic coagulant and a flocculant.
  • the turbidity is as high as 282 to 310 degrees
  • the odor intensity is as high as 3 to 4
  • the clearness of the booth circulating water is not sufficient, which indicates that it is odorous. From the comparison of the results of Examples 2 to 13 and Comparative Examples 4 to 7, the excellent clarification effect and malodor prevention effect of the wet coating booth circulating water of the present invention were clearly shown.
  • Comparative Example 11 In Comparative Example 11, the treatment test (2) of the booth circulating water was performed without adding the chemical, and the test result was obtained. In other words, this is an example of no processing.
  • Table 4 shows the turbidity measurement results and odor intensity determination results of the booth circulating water after the tests of Examples 14 to 18 and Comparative Examples 8 to 11, and the average value of the booth circulating water charge during the test.
  • Addition amount indicates mg / L vs. amount of water retained in circulating water
  • drugs B and D indicate% by weight with respect to total paint weight
  • drug C indicates% by weight with respect to water-based paint weight.
  • Examples 14 to 18 of the present invention showed excellent effects with turbidity of 60 degrees or less and odor intensity of 2 or less.
  • Comparative Examples 8 to 10 in which the treatment agent of the present invention is not added the turbidity is 180 degrees or more, the odor intensity is 3, the clarity of the booth circulating water is not sufficient, and it can be seen that the odor. From the comparison of the results of Examples 14 to 18 and Comparative Examples 8 to 11 described above, the excellent clarification effect and bad odor prevention effect of the wet coating booth circulating water of the present invention were clearly shown.
  • Comparative Example 15 In Comparative Example 15, the booth circulating water treatment test (3) was performed without adding any chemicals, and the test results were obtained. In other words, this is an example of no processing.
  • Table 5 shows the turbidity measurement results and odor intensity determination results of the booth circulating water after completion of the tests of Examples 19 to 22 and Comparative Examples 12 to 15, and the average value of the booth circulating water charge during the test.
  • Addition amount indicates mg / L vs. amount of water retained in circulating water
  • drugs B and D indicate% by weight with respect to total paint weight
  • drug C indicates% by weight with respect to water-based paint weight.
  • Examples 19 to 22 of the present invention showed excellent effects with turbidity of 40 degrees or less and odor intensity of 1 or less.
  • Comparative Examples 12 to 14 in which the treatment agent of the present invention is not added the turbidity is 230 degrees or more, the odor intensity is 3 to 4, the booth circulating water is not sufficiently clarified, and it can be seen that the smell is bad. From the comparison of the results of Examples 19 to 22 and Comparative Examples 12 to 15 described above, the excellent clarification effect and malodor prevention effect of the wet coating booth circulating water of the present invention were clearly shown.
  • the present invention can be applied to a wet paint booth where the bad smell and turbidity problem of the circulating water in the booth is particularly serious due to the use of water-based paint, and can obtain an excellent foul odor prevention effect and clarification effect.

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JP6389978B1 (ja) * 2018-07-10 2018-09-12 伯東株式会社 湿式塗装ブース循環水処理剤及び処理方法
JP2020151682A (ja) * 2019-03-22 2020-09-24 伯東株式会社 湿式塗装ブース循環水処理剤及び処理方法

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