JP2003071434A - Method for treating recirculated water in spray booth and treating agent for spray booth - Google Patents
Method for treating recirculated water in spray booth and treating agent for spray boothInfo
- Publication number
- JP2003071434A JP2003071434A JP2001266035A JP2001266035A JP2003071434A JP 2003071434 A JP2003071434 A JP 2003071434A JP 2001266035 A JP2001266035 A JP 2001266035A JP 2001266035 A JP2001266035 A JP 2001266035A JP 2003071434 A JP2003071434 A JP 2003071434A
- Authority
- JP
- Japan
- Prior art keywords
- circulating water
- coating
- paint
- resin emulsion
- cationic resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 13
- 239000007921 spray Substances 0.000 title abstract description 4
- 239000011248 coating agent Substances 0.000 claims abstract description 70
- 238000000576 coating method Methods 0.000 claims abstract description 70
- 229920005989 resin Polymers 0.000 claims abstract description 46
- 239000011347 resin Substances 0.000 claims abstract description 46
- 239000000839 emulsion Substances 0.000 claims abstract description 38
- 125000002091 cationic group Chemical group 0.000 claims abstract description 37
- 239000003973 paint Substances 0.000 claims description 56
- 239000000178 monomer Substances 0.000 claims description 12
- JKNCOURZONDCGV-UHFFFAOYSA-N 2-(dimethylamino)ethyl 2-methylprop-2-enoate Chemical compound CN(C)CCOC(=O)C(C)=C JKNCOURZONDCGV-UHFFFAOYSA-N 0.000 claims description 6
- DPBJAVGHACCNRL-UHFFFAOYSA-N 2-(dimethylamino)ethyl prop-2-enoate Chemical group CN(C)CCOC(=O)C=C DPBJAVGHACCNRL-UHFFFAOYSA-N 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- 230000001804 emulsifying effect Effects 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- KGIGUEBEKRSTEW-UHFFFAOYSA-N 2-vinylpyridine Chemical compound C=CC1=CC=CC=N1 KGIGUEBEKRSTEW-UHFFFAOYSA-N 0.000 claims description 3
- FLCAEMBIQVZWIF-UHFFFAOYSA-N 6-(dimethylamino)-2-methylhex-2-enamide Chemical compound CN(C)CCCC=C(C)C(N)=O FLCAEMBIQVZWIF-UHFFFAOYSA-N 0.000 claims description 3
- UZNHKBFIBYXPDV-UHFFFAOYSA-N trimethyl-[3-(2-methylprop-2-enoylamino)propyl]azanium;chloride Chemical compound [Cl-].CC(=C)C(=O)NCCC[N+](C)(C)C UZNHKBFIBYXPDV-UHFFFAOYSA-N 0.000 claims description 3
- KGJBAJISQICDQC-UHFFFAOYSA-N methyl-[3-(2-methylprop-2-enoyloxy)propyl]azanium;chloride Chemical compound Cl.CNCCCOC(=O)C(C)=C KGJBAJISQICDQC-UHFFFAOYSA-N 0.000 claims description 2
- UGIJCMNGQCUTPI-UHFFFAOYSA-N 2-aminoethyl prop-2-enoate Chemical compound NCCOC(=O)C=C UGIJCMNGQCUTPI-UHFFFAOYSA-N 0.000 claims 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims 1
- 239000010802 sludge Substances 0.000 abstract description 35
- 239000002270 dispersing agent Substances 0.000 abstract description 15
- 238000007667 floating Methods 0.000 abstract description 14
- 239000000463 material Substances 0.000 abstract description 9
- 238000012423 maintenance Methods 0.000 abstract description 3
- -1 colloidal silica aluminum compound Chemical class 0.000 description 15
- 239000004113 Sepiolite Substances 0.000 description 11
- 229910052624 sepiolite Inorganic materials 0.000 description 11
- 235000019355 sepiolite Nutrition 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 5
- 239000002585 base Substances 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 5
- 239000010419 fine particle Substances 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 229920000877 Melamine resin Polymers 0.000 description 4
- 239000004480 active ingredient Substances 0.000 description 4
- 239000000084 colloidal system Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000003995 emulsifying agent Substances 0.000 description 4
- 238000007720 emulsion polymerization reaction Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 3
- 150000001768 cations Chemical group 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000005215 alkyl ethers Chemical class 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000003093 cationic surfactant Substances 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 238000004070 electrodeposition Methods 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical compound O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 2
- 239000002736 nonionic surfactant Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- LUOPFCDZQGKIDO-UHFFFAOYSA-N 2-(hydroxymethyl)prop-2-enamide Chemical compound NC(=O)C(=C)CO LUOPFCDZQGKIDO-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Natural products OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 229920001214 Polysorbate 60 Polymers 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- HZPJYWIXRJUAGH-UHFFFAOYSA-N [2-hydroxy-3-(2-methylprop-2-enoyloxy)propyl]-methylazanium;chloride Chemical compound [Cl-].C[NH2+]CC(O)COC(=O)C(C)=C HZPJYWIXRJUAGH-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M acrylate group Chemical group C(C=C)(=O)[O-] NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 150000003973 alkyl amines Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910001593 boehmite Inorganic materials 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- AFSIMBWBBOJPJG-UHFFFAOYSA-N ethenyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC=C AFSIMBWBBOJPJG-UHFFFAOYSA-N 0.000 description 1
- UIWXSTHGICQLQT-UHFFFAOYSA-N ethenyl propanoate Chemical compound CCC(=O)OC=C UIWXSTHGICQLQT-UHFFFAOYSA-N 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002506 iron compounds Chemical class 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000007591 painting process Methods 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 229940079827 sodium hydrogen sulfite Drugs 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 0.000 description 1
Landscapes
- Agricultural Chemicals And Associated Chemicals (AREA)
- Separation Of Particles Using Liquids (AREA)
- Physical Water Treatments (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は塗装ブース循環水の
処理方法及び塗装ブース処理剤に係り、特に、湿式塗装
ブースにおいて、オーバースプレーされた余剰塗料を捕
集するために噴霧される循環水系において、循環水中の
余剰塗料を不粘着化して循環水槽で浮上分離することに
より、系内の塗料スラッジの沈降、堆積を防止する湿式
塗装ブース循環水の処理方法及び塗装ブース処理剤に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating booth circulating water treatment method and a coating booth treating agent, and more particularly to a circulating water system sprayed to collect excess oversprayed paint in a wet coating booth. The present invention relates to a method for treating circulating water in a wet coating booth and a coating booth treating agent, which prevent sedimentation and accumulation of paint sludge in a system by making surplus coating material in the circulating water tack-free and floating in a circulating water tank.
【０００２】[0002]
【従来の技術】自動車の車体の塗装では、下地処理とし
ての電着下地塗装の後、中塗塗装、上塗ベース塗装、及
び上塗クリア塗装の３つの湿式塗装工程が行われる。2. Description of the Related Art In coating a vehicle body of an automobile, three wet coating processes are performed, namely, an electrodeposition base coating as a base treatment, an intermediate coating coating, a top coating base coating, and a top coating clear coating.
【０００３】下塗塗装においては、まず、ボディ鉄板の
油落しを行った後、鉄板と塗料との接着性を良くするた
めに、鉄板表面にリン酸亜鉛の皮膜を形成し、その後、
エポキシ系塗料を電着し、この電着塗料を加熱硬化させ
る。中塗塗装においては、ポリエステル系塗料を用いた
中塗りを行い、次いでこの中塗塗料を加熱硬化させる。
上塗塗装においては、まず、アクリル樹脂等からなるベ
ース塗料を塗布し、次いでその上にアクリル樹脂からな
るクリア塗料を塗布し、その後、ベース塗料及びクリア
塗料の加熱硬化が行われる。In the undercoating, first, the body iron plate is oil-removed, and then a zinc phosphate film is formed on the surface of the iron plate in order to improve the adhesion between the iron plate and the paint.
The epoxy-based paint is electrodeposited, and the electrodeposition paint is heated and cured. In the intermediate coating, an intermediate coating using a polyester-based coating is performed, and then this intermediate coating is heat-cured.
In the top coating, first, a base paint made of an acrylic resin or the like is applied, then a clear paint made of an acrylic resin is applied thereon, and then the base paint and the clear paint are heat-cured.
【０００４】車体の湿式塗装工程では、一般に車体に噴
霧された塗料の歩留りは５０〜７０％であり、使用塗料
の５０〜３０％は次工程で除去すべき過剰塗料である。
この過剰に噴霧された余剰塗料は、通常、水洗による湿
式塗装ブースで捕集処理されており、水洗水は循環使用
される。In the wet painting process of a vehicle body, the yield of the paint sprayed on the vehicle body is generally 50 to 70%, and 50 to 30% of the paint used is excess paint to be removed in the next step.
The excessively sprayed excess paint is usually collected in a wet coating booth by washing with water, and the washing water is circulated.
【０００５】図１は、この湿式塗装ブースにおける循環
水系を示す系統図であり、循環水槽１内の水は、ポンプ
Ｐ１を有する配管１１により湿式塗装ブース２に送水さ
れ、湿式塗装ブース２内に散水される。湿式塗装ブース
２内に散水され、余剰塗料を捕集した水は配管１２によ
り循環水槽１に返送される。循環水槽１内の水は、ポン
プＰ２を有する配管１３より遠心分離機３等の固液分離
装置に送水され、塗料スラッジが分離回収される。回収
された塗料スラッジは乾燥し再生塗料粉末としてリサイ
クルされる。この遠心分離機３で塗料スラッジが除去さ
れた処理水は配管１４より循環水槽１に返送される。循
環水槽１内には、通常の場合、撹拌装置あるいは水中ミ
キサー（図示せず）を配置し、塗料スラッジ含有水を強
制撹拌することで塗料スラッジを循環水中に分散し易く
している。また、循環水槽１或いは、循環配管１１，１
２等には、捕集された余剰塗料を不粘着化すると共に水
中で分散し易くするための薬剤が添加される。FIG. 1 is a system diagram showing a circulating water system in the wet coating booth. The water in the circulating water tank 1 is sent to the wet coating booth 2 through a pipe 11 having a pump P 1, and the inside of the wet coating booth 2 is shown. Is sprinkled on. Water that has been sprayed in the wet coating booth 2 and that has collected excess paint is returned to the circulating water tank 1 through the pipe 12. The water in the circulating water tank 1 is sent from a pipe 13 having a pump P 2 to a solid-liquid separation device such as a centrifugal separator 3 to separate and collect paint sludge. The collected paint sludge is dried and recycled as recycled paint powder. The treated water from which the paint sludge has been removed by the centrifugal separator 3 is returned to the circulating water tank 1 through the pipe 14. Usually, a stirring device or a submersible mixer (not shown) is arranged in the circulating water tank 1 to forcibly stir the paint sludge-containing water to facilitate dispersion of the paint sludge in the circulating water. Also, the circulating water tank 1 or the circulating pipes 11, 1
To 2 and the like, a chemical agent is added to make the collected excess paint tack-free and to facilitate dispersion in water.
【０００６】[0006]
【発明が解決しようとする課題】このような分散方式の
塗装ブース循環水系においては、塗料スラッジは粒子径
１５〜３０μｍ程度の微細粒子となって循環水中に分散
しているが、塗装ブース循環水系では、多量の塗料スラ
ッジ（ＳＳ）を系内に保有しているため、汚れ易く、特
に、休日などの塗装ラインの運転停止時において塗料ス
ラッジの沈降量が多くなり、循環配管や循環水槽などに
多量に堆積する。循環配管や循環水槽内に堆積した塗料
スラッジは、経時により厚密化して塊状に肥大するた
め、再浮上は困難であり、ポンプにより回収系へ移送し
て処理することは殆ど不可能である。In such a dispersion type coating booth circulating water system, the coating sludge is dispersed in the circulating water as fine particles having a particle size of about 15 to 30 μm. Since a large amount of paint sludge (SS) is stored in the system, it easily gets dirty, and especially when the paint line operation is stopped, such as during holidays, the amount of paint sludge settling increases, causing it to circulate in circulating pipes and circulating water tanks. Accumulate in large quantities. The paint sludge accumulated in the circulation pipe or the circulating water tank becomes thick and lumpy and expands over time, so that it is difficult to re-float and it is almost impossible to transfer it to a recovery system by a pump for treatment.
【０００７】このため、従来においては、清掃等により
この堆積物を除去するなどして対応しているが、この堆
積物の除去のための作業が、保守管理に要する手間や時
間の増大につながっている。For this reason, in the past, this deposit has been dealt with by cleaning or the like, but the work for removing this deposit leads to an increase in labor and time required for maintenance. ing.
【０００８】本発明は、塗料スラッジを循環水槽内で浮
上させて、効率的に分離することにより、塗料スラッジ
の堆積の問題を解決する塗装ブース循環水の処理方法及
び塗装ブース処理剤を提供することを目的とする。The present invention provides a coating booth circulating water treating method and a coating booth treating agent which solve the problem of paint sludge accumulation by floating the coating sludge in a circulating water tank and efficiently separating it. The purpose is to
【０００９】[0009]
【課題を解決するための手段】本発明の塗装ブース循環
水の処理方法は、塗装ブース循環水に、該循環水中の余
剰塗料を不粘着化する薬剤及びカチオン性樹脂エマルシ
ョンを添加することを特徴とする。A method for treating circulating water in a coating booth according to the present invention is characterized in that a chemical and a cationic resin emulsion for detackifying excess coating material in the circulating water are added to the circulating water in the coating booth. And
【００１０】請求項２の塗装ブース循環水の処理方法
は、この方法において、前記カチオン性樹脂エマルショ
ンが、カチオン基を有するモノマーの重合体を水性エマ
ルションとして水に乳化したものであって、更に前記重
合体が、ジメチルアミノエチルアクリレート、ジメチル
アミノエチルメタクリレート、ジメチルアミノエチルア
クリレートの４級化合物、ジメチルアミノエチルメタク
リレートの４級化合物、メタクリルアミドプロピルトリ
メチルアンモニウムクロライド、ジメチルアミノプロピ
ルメタクリルアミド、２−ヒドロキシ−３−メタクリル
オキシプロピルメチルアンモニウムクロライド、及びビ
ニルピリジンよりなる群から選ばれる１種又は２種以上
のモノマー単位を含有していることを特徴とする。A method for treating circulating water in a coating booth according to claim 2 is the method in which the cationic resin emulsion is obtained by emulsifying a polymer of a monomer having a cationic group as an aqueous emulsion in water. The polymer is dimethylaminoethyl acrylate, dimethylaminoethyl methacrylate, quaternary compound of dimethylaminoethyl acrylate, quaternary compound of dimethylaminoethyl methacrylate, methacrylamidopropyl trimethylammonium chloride, dimethylaminopropyl methacrylamide, 2-hydroxy-3. -It is characterized by containing one or more kinds of monomer units selected from the group consisting of methacryloxypropylmethylammonium chloride and vinylpyridine.
【００１１】本発明の塗装ブース処理剤は、カチオン性
樹脂エマルションを含有することを特徴とする。The coating booth treating agent of the present invention is characterized by containing a cationic resin emulsion.
【００１２】塗装ブース循環水系において、余剰塗料を
不粘着化する薬剤及びカチオン性樹脂エマルションを添
加すると、塗料スラッジの微細粒子は循環水槽内で浮上
分離し、塗装ブース循環水系内における塗料スラッジの
堆積の問題を解消することができる。[0012] In the coating booth circulating water system, when a chemical and a cationic resin emulsion for making the excess paint non-tacky are added, fine particles of the paint sludge are floated and separated in the circulating water tank, and the coating sludge is accumulated in the circulating water system of the coating booth. The problem of can be solved.
【００１３】即ち、カチオン性樹脂エマルションはその
カチオン性により塗料スラッジの微細粒子の表面に、軽
く、強固で疎水性、撥水性に優れた樹脂皮膜を形成す
る。このカチオン性樹脂エマルションによる樹脂皮膜が
形成された塗料スラッジは、微細粒子のまま嵩高くなる
こともなく、その表面の軽量な樹脂皮膜の疎水性、撥水
性により、浮上速度が高められ浮上分離が促進される。That is, the cationic resin emulsion forms a light, strong, hydrophobic, and water-repellent resin film on the surface of fine particles of coating sludge due to its cationic property. The coating sludge on which the resin film is formed by this cationic resin emulsion does not become bulky as fine particles, and the hydrophobicity and water repellency of the lightweight resin film on the surface of the paint sludge enhances the floating speed, resulting in floating separation. Be promoted.
【００１４】[0014]
【発明の実施の形態】以下に本発明の塗装ブース循環水
の処理方法及び塗装ブース処理剤の実施の形態を詳細に
説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a method for treating circulating water in a coating booth and a coating booth treating agent according to the present invention will be described in detail below.
【００１５】本発明においては、循環水中の余剰塗料を
不粘着化する薬剤及びカチオン性樹脂エマルションを添
加し、不粘着化した塗料スラッジを循環槽内で浮上分離
する。In the present invention, a chemical for detackifying surplus paint in circulating water and a cationic resin emulsion are added, and the detackified paint sludge is floated and separated in a circulation tank.
【００１６】従って、本発明においては、循環水槽内に
浮上した塗料スラッジをスキマー等の浮上物掻き寄せ装
置により分離して系外へ排出すれば良く、従って、図１
における遠心分離機を不要とすることができる。Therefore, in the present invention, the paint sludge floating in the circulating water tank may be separated by a floating object scraping device such as a skimmer and discharged from the system.
It is possible to dispense with the centrifuge in.
【００１７】本発明において用いる塗料の不粘着化のた
めの薬剤（以下「不粘着化分散剤」と称す場合があ
る。）としては、余剰塗料を不粘着化させると共に分散
させる効果を有する薬剤であれば良く、特に制限はない
が、
セピオライト
メラミンホルムアルデヒド縮合物の酸コロイド
コロイダルシリカ
アルミニウム化合物（ポリ塩化アルミニウム、硫酸
アルミニウム、アルミナゾル（ベーマイト）等）
鉄化合物（塩化第二鉄、ポリ塩化鉄）
などの１種又は２種以上を用いることができ、特に添加
効果の面からセピオライトが好適である。セピオライト
はＭｇ８Ｓｉ１２Ｏ３０（ＯＨ）４（ＯＨ２）４・８Ｈ
２Ｏで表される含水マグネシウムケイ酸塩で、多くのミ
クロポアを有する鎖状構造の繊維状鉱物であるため、塗
装ブース循環水系に添加されたセピオライトは、塗料粒
子と反応してそのミクロポアの内に塗料粒子を吸着する
ことによって塗料を効果的に不粘着化すると共に分散状
態を安定化させることができる。不粘着化分散剤として
用いるセピオライトとしては、天然に産出する粘土鉱物
のセピオライト、或いは、これを精製加工した市販品を
用いることができ、不粘着化効果の点からその粒子の大
きさは、繊維長として５０μｍ以下、特に１０μｍ以下
であることが好ましい。The agent for making the coating material tack-free (hereinafter sometimes referred to as "tack-free dispersant") used in the present invention is a chemical agent that has the effect of making the excess coating material tack-free and dispersing it. There is no particular limitation as long as it is an acid colloid of sepiolite melamine formaldehyde condensate colloidal silica aluminum compound (polyaluminum chloride, aluminum sulfate, alumina sol (boehmite), etc.) iron compound (ferric chloride, polyferric chloride), etc. One kind or two or more kinds can be used, and sepiolite is particularly preferable from the viewpoint of addition effect. Sepiolite Mg 8 Si 12 O 30 (OH ) 4 (OH 2) 4 · 8H
Since it is a hydrous magnesium silicate represented by 2 O and is a fibrous mineral with a chain structure having many micropores, sepiolite added to the coating booth circulating water system reacts with the paint particles and becomes one of the micropores. By adsorbing the paint particles to the paint, the paint can be effectively made tack-free and the dispersion state can be stabilized. As the sepiolite used as the tack-free dispersant, a naturally occurring clay mineral sepiolite, or a commercially available product obtained by purifying and processing the same can be used. The length is preferably 50 μm or less, and particularly preferably 10 μm or less.
【００１８】セピオライト等の不粘着化分散剤の添加箇
所としては、図１において、配管１１，１２或いは循環
水槽１等が挙げられ、これらのうちの２箇所以上に添加
しても良い。不粘着化分散剤の添加量は、多い程、塗料
粒子が微細化して高い不粘着化効果が得られる。不粘着
化分散剤は、処理対象とする塗料の種類等によっても異
なるが、一般的には循環水中の濃度、即ち、配管１１内
を送水される水中の濃度が１ｍｇ／Ｌ以上、特に１０ｍ
ｇ／Ｌ以上、とりわけ５００ｍｇ／Ｌ以上となるよう
に、循環水中に持ち込まれる塗料ミストに対して０．１
重量％以上、特に１〜５重量％とりわけ１〜２重量％と
なるように添加するのが好ましい。この場合、不粘着化
分散剤は余剰塗料に付着して消耗すると共に浮上分離し
て回収されるＳＳに伴って排出されるので、この濃度と
なるように、セピオライト等の不粘着化分散剤を連続注
入又はバッチ注入して補充するのが好ましい。As the location where the detackifying dispersant such as sepiolite is added, the pipes 11 and 12, the circulating water tank 1 and the like in FIG. 1 can be mentioned, and the location may be added to two or more locations. The larger the amount of the non-tackifying dispersant added, the finer the paint particles and the higher the non-tacking effect. The tack-free dispersant varies depending on the type of coating material to be treated, etc., but in general, the concentration in circulating water, that is, the concentration in water fed through the pipe 11 is 1 mg / L or more, particularly 10 m.
g / L or more, especially 500 mg / L or more, with respect to the paint mist brought into the circulating water, 0.1
It is preferable to add it in an amount of not less than 1% by weight, especially 1 to 5% by weight, especially 1 to 2% by weight. In this case, the non-tackifying dispersant adheres to the excess paint and is exhausted, and is discharged along with the SS that is floated and separated and collected, so that the non-tacking dispersant such as sepiolite is adjusted to this concentration. It is preferable to replenish by continuous injection or batch injection.
【００１９】不粘着化分散剤の添加形態については特に
制限はないが、０．１〜２０重量％程度の水分散液とし
て、或いは０．１〜２０重量％の水溶液として添加する
のが好ましい。The addition form of the tack-free dispersant is not particularly limited, but it is preferably added as an aqueous dispersion of about 0.1 to 20% by weight or an aqueous solution of 0.1 to 20% by weight.
【００２０】本発明においては、このような不粘着化分
散剤により微細粒子として分散させた塗料スラッジの浮
上分離性を高めるために、更にカチオン性樹脂エマルシ
ョンを添加する。In the present invention, a cationic resin emulsion is further added in order to improve the floating separation property of the paint sludge dispersed as fine particles by such a tack-free dispersant.
【００２１】カチオン性樹脂エマルションは、樹脂構造
中にカチオン基を有する樹脂が水性エマルションとして
水に乳化したものであり、カチオン基を有する樹脂とし
ては、カチオン基を有するモノマーの重合体や、樹脂を
カチオン変性したものなどがある。The cationic resin emulsion is obtained by emulsifying a resin having a cation group in the resin structure in water as an aqueous emulsion. As the resin having a cation group, a polymer of a monomer having a cation group or a resin is used. Some include cation-modified.
【００２２】カチオン性樹脂エマルションのカチオン基
を有するモノマー単位としては、ジメチルアミノエチル
アクリレート、ジメチルアミノエチルメタクリレート、
ジメチルアミノエチルアクリレートの４級化合物、ジメ
チルアミノエチルメタクリレートの４級化合物、メタク
リルアミドプロピルトリメチルアンモニウムクロライ
ド、ジメチルアミノプロピルメタクリルアミド、２−ヒ
ドロキシ−３−メタクリルオキシプロピルメチルアンモ
ニウムクロライド、ビニルピリジンなどがあり、これら
は１種以上含まれていればよい。As the monomer unit having a cationic group of the cationic resin emulsion, dimethylaminoethyl acrylate, dimethylaminoethyl methacrylate,
There are quaternary compounds of dimethylaminoethyl acrylate, quaternary compounds of dimethylaminoethyl methacrylate, methacrylamidopropyltrimethylammonium chloride, dimethylaminopropylmethacrylamide, 2-hydroxy-3-methacryloxypropylmethylammonium chloride, vinylpyridine, etc., These may be contained in one or more kinds.
【００２３】上記樹脂はこれらのモノマー単位のほかに
酢酸ビニルエステル、プロピオン酸ビニルエステル、バ
ーサチック酸ビニルエステル、ステアリン酸ビニルエス
テル、アクリル酸エステル、メタクリル酸エステル、マ
レイン酸エステル、フマール酸エステル、エチレン、ブ
タジエン、クロロプレン、イソプレン、アクリロニトリ
ル、スチレン、α−メチルスチレン、塩化ビニル、塩化
ビニリデン、アクリルアマイド、メチロールアクリルア
マイド、グリシジルメタクリレートなどの非イオン性の
モノマー単位を１種以上含むものが好ましい。特に、カ
チオン性樹脂エマルションによる皮膜形成性及び皮膜の
疎水性、撥水性を良くするためには、炭素数３以上のア
ルキル基を有するアクリル酸エステル単位を含むことが
好ましい。In addition to these monomer units, the above-mentioned resins include vinyl acetate, vinyl propionate, vinyl versatate, vinyl stearate, acrylic acid, methacrylic acid ester, maleic acid ester, fumaric acid ester, ethylene, Those containing at least one nonionic monomer unit such as butadiene, chloroprene, isoprene, acrylonitrile, styrene, α-methylstyrene, vinyl chloride, vinylidene chloride, acrylic amide, methylol acrylic amide, and glycidyl methacrylate are preferable. In particular, in order to improve the film-forming property of the cationic resin emulsion, the hydrophobic property of the film, and the water repellency, it is preferable to contain an acrylate unit having an alkyl group having 3 or more carbon atoms.
【００２４】これらの樹脂を水性エマルションとして乳
化する乳化剤としてはノニオン性又はカチオン性の界面
活性剤や保護コロイドが好ましく、ノニオン性界面活性
剤としてはポリオキシエチレンアルキルエーテル、ポリ
オキシエチレンアルキルアリルエーテル、ポリオキシエ
チレンソルビタン脂肪酸エステル、ポリオキシエチレン
アルキルアミン、ポリオキシエチレン脂肪酸エステルな
どがあり、カチオン性界面活性剤としては脂肪族炭化水
素基を有する第１級アミン塩、第２級アミン塩、第３級
アミン塩、第４級アンモニウム塩などがあり、保護コロ
イドとしてはポリビニルアルコールなどがある。Nonionic or cationic surfactants and protective colloids are preferred as emulsifiers for emulsifying these resins as an aqueous emulsion, and polyoxyethylene alkyl ethers, polyoxyethylene alkyl allyl ethers, as nonionic surfactants, There are polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkylamine, polyoxyethylene fatty acid ester and the like, and as the cationic surfactant, a primary amine salt having an aliphatic hydrocarbon group, a secondary amine salt, and a tertiary amine salt. There are secondary amine salts, quaternary ammonium salts and the like, and protective colloids include polyvinyl alcohol and the like.
【００２５】カチオン性樹脂エマルションは、それぞれ
の樹脂を上記乳化剤で水に乳化して製造してもよいが、
それぞれのモノマーから乳化重合によって製造するのが
好ましい。乳化重合の方法は、例えばカチオン基を有す
るモノマー及び非イオン性のモノマーを上記乳化剤とと
もに水中に撹拌分散し、Ｎ２ガスを吹込みながら加温
し、過酸化ベンゾイル、過硫酸塩、過酸化水素等の触
媒、又はこれらの酸化剤とチオ硫酸ナトリウム、亜硫酸
水素ナトリウム等の還元剤とを組合わせたレドックス触
媒などを添加して乳化重合を行い、水性エマルションを
得ることができる。The cationic resin emulsion may be produced by emulsifying each resin in water with the above emulsifier.
It is preferable to produce each monomer by emulsion polymerization. The method of emulsion polymerization is, for example, stirring and dispersing a monomer having a cationic group and a nonionic monomer in water together with the emulsifier, heating while blowing N 2 gas, benzoyl peroxide, persulfate, and hydrogen peroxide. Etc., or a redox catalyst in which these oxidizing agents are combined with a reducing agent such as sodium thiosulfate or sodium hydrogen sulfite is added to carry out emulsion polymerization to obtain an aqueous emulsion.
【００２６】カチオン性樹脂エマルションの樹脂中に含
まれるカチオン基を有するモノマー単位の量は０．１〜
２０重量％が好ましく、またエマルション中のこれらの
樹脂固形分の量は５〜６０重量％、乳化剤の量は０．１
〜５重量％であることが好ましい。The amount of the monomer unit having a cationic group contained in the resin of the cationic resin emulsion is 0.1 to 0.1.
20% by weight is preferred, the amount of these resin solids in the emulsion is 5 to 60% by weight and the amount of emulsifier is 0.1%.
It is preferably about 5% by weight.
【００２７】カチオン性樹脂エマルションは、セピオラ
イト等の不粘着化分散剤と共に添加しても良く、各々別
々に添加しても良いが、好ましくは、循環水槽１に各々
別々に添加することが好ましい。The cationic resin emulsion may be added together with the detackifying dispersant such as sepiolite, or may be added separately, but it is preferable to add the cationic resin emulsion to the circulating water tank 1 separately.
【００２８】カチオン性樹脂エマルションの添加量が少
な過ぎるとカチオン性樹脂エマルションを添加したこと
による塗料スラッジの浮上分離性の向上効果を十分に得
ることができず、多過ぎると発泡の原因となり、また薬
剤費が高くつき不経済であることから、カチオン性樹脂
エマルションの添加量は有効成分（樹脂固形分量）とし
て循環水に対して１ｍｇ／Ｌ以上、好ましくは１０ｍｇ
／Ｌ以上、特に２０〜５０ｍｇ／Ｌとするのが好まし
い。If the amount of the cationic resin emulsion added is too small, the effect of improving the floating separation property of the paint sludge due to the addition of the cationic resin emulsion cannot be sufficiently obtained, and if it is too large, it causes foaming. Since the drug cost is high and it is uneconomical, the amount of the cationic resin emulsion added is 1 mg / L or more, preferably 10 mg, as the active ingredient (resin solid content) with respect to circulating water.
/ L or more, and particularly preferably 20 to 50 mg / L.
【００２９】カチオン性樹脂エマルションは、不粘着化
分散剤と同様に、塗料スラッジに付着して消耗すると共
に、塗料スラッジと共に系外へ排出されるため、循環水
中の濃度が上記濃度となるように連続注入又はバッチ注
入して補充することが好ましく、特に、循環水系に捕集
される余剰塗料量に比例して連続注入することが望まし
い。この場合、カチオン性樹脂エマルションは有効成分
量として、塗料に対して０．１重量％以上、特に０．５
重量％以上、とりわけ０．６〜１．０重量％の割合で連
続注入することが好ましい。As with the detackifying dispersant, the cationic resin emulsion adheres to and is consumed by the coating sludge and is discharged out of the system together with the coating sludge, so that the concentration in the circulating water becomes the above concentration. It is preferable to replenish by continuous injection or batch injection, and it is particularly preferable to inject continuously in proportion to the amount of surplus paint collected in the circulating water system. In this case, the cationic resin emulsion is used as an active ingredient in an amount of 0.1% by weight or more, especially 0.5% by weight based on the coating material.
It is preferable to continuously inject at a ratio of not less than wt%, especially 0.6 to 1.0 wt%.
【００３０】カチオン性樹脂エマルションは、樹脂固形
分濃度１０〜３０重量％程度のエマルションとして、必
要に応じて水で希釈して循環水系に添加するのが好まし
い。The cationic resin emulsion is preferably added to the circulating water system as an emulsion having a resin solid content concentration of about 10 to 30% by weight, if necessary diluted with water.
【００３１】カチオン性樹脂エマルションを添加するこ
とにより、塗料スラッジの浮上分離性を高め、循環水槽
において塗料スラッジを速やかに浮上させて、これを分
離回収することができるようになる。By adding the cationic resin emulsion, the floating separation property of the paint sludge can be enhanced, and the paint sludge can be quickly floated in the circulating water tank to be separated and recovered.
【００３２】本発明の塗装ブース処理剤は、このような
カチオン性樹脂エマルションを含有するものであり、更
に、上述の不粘着化分散剤を含むものであっても良い。The coating booth treating agent of the present invention contains such a cationic resin emulsion, and may further contain the above-mentioned tack-free dispersant.
【００３３】本発明の塗装ブース処理剤がカチオン性樹
脂エマルションと不粘着化分散剤とを含む場合、その好
適な割合は、各々有効成分量として、不粘着化分散剤１
００重量部に対してカチオン性樹脂エマルション２０〜
８０重量部、特に３０〜６０重量部である。When the coating booth treating agent of the present invention contains a cationic resin emulsion and a non-tackifying dispersant, a suitable ratio thereof is that of the non-tacking dispersant 1 as the amount of each active ingredient.
Cationic resin emulsion 20 to 100 parts by weight
80 parts by weight, especially 30 to 60 parts by weight.
【００３４】[0034]
【実施例】以下に実施例及び比較例を挙げて本発明をよ
り具体的に説明する。EXAMPLES The present invention will be described more specifically with reference to Examples and Comparative Examples below.
【００３５】なお、以下の実施例及び比較例において用
いた薬剤は次の通りである。
セピオライト：近江鉱業（株）製セピオライト「ミ
ラクレー登録商標Ｐ−８０Ｖ」繊維長２μｍ未満
メラミンホルムアルデヒド酸コロイド：メラミン１
モルに対して２モルのホルムアルデヒドを反応させて得
られたメチロール化メラミン０．０５モルを１．３５重
量％塩酸水溶液１００ｍＬに加えて調製したもの（以下
「Ｍ／Ｆ」と略記する。）
ポリ塩化アルミニウム：ＰＡＣと略記する。
カチオン性樹脂エマルション：メタクリル酸メチル
３０重量％、アクリル酸ブチル５５重量％、ジメチルア
ミノエチルアクリレート１０重量％及びポリオキシエチ
レンアルキルエーテル５重量％を常法により乳化重合し
たもの。樹脂固形分量２５重量％The chemicals used in the following Examples and Comparative Examples are as follows. Sepiolite: Sepiolite "Mira clay registered trademark P-80V" manufactured by Omi Mining Co., Ltd. Fiber length less than 2 μm Melamine formaldehyde acid colloid: Melamine 1
Prepared by adding 0.05 mol of methylolated melamine obtained by reacting 2 mol of formaldehyde to 100 mol of a 1.35 wt% hydrochloric acid aqueous solution (hereinafter abbreviated as "M / F"). Aluminum chloride: Abbreviated as PAC. Cationic resin emulsion: Emulsion polymerization of 30% by weight of methyl methacrylate, 55% by weight of butyl acrylate, 10% by weight of dimethylaminoethyl acrylate and 5% by weight of polyoxyethylene alkyl ether by an ordinary method. Resin solid content 25% by weight
【００３６】また、塗料としては、自動車ボディ用塗料
として、下記３種について試験を行った。
溶剤型中塗塗料（溶剤中塗）
溶剤系クリア塗料（溶剤クリア）
水性上塗塗料（水性上塗）As the paints, the following three kinds of paints for automobile bodies were tested. Solvent-based intermediate coating (solvent-based coating) Solvent-based clear coating (solvent-clear) Water-based top coating (water-based top coating)
【００３７】実施例１〜１０，比較例１〜５
保有水量５０Ｌの試験装置を用いて、循環水量１００Ｌ
／分として試験を行った。塗料のスプレー条件は２０ｇ
／分の速度で１０分吹き付けとし、表１に示す塗料の循
環水系において、表１に示す薬剤を表１に示す添加量
（有効成分量。ＰＡＣはＡｌ２Ｏ３換算添加量であ
る。）で試験水槽に連続的に添加し、循環水槽における
塗料スラッジの浮上量（循環水槽内の全塗料スラッジ量
に対する浮上している塗料スラッジ量の割合）と浮上速
度を調べ結果を表１に示した。Examples 1 to 10 and Comparative Examples 1 to 5 Using a test apparatus having a water holding amount of 50 L, a circulating water amount of 100 L
The test was performed as / minute. Spray condition of paint is 20g
Spraying was carried out for 10 minutes at a speed of 1 / min, and in the circulating water system of the coating material shown in Table 1, the amounts of the agents shown in Table 1 were added (the amount of active ingredient. PAC is the amount added in terms of Al 2 O 3 ). Was continuously added to the test water tank, and the floating amount of paint sludge in the circulating water tank (ratio of the amount of paint sludge floating to the total amount of paint sludge in the circulating water tank) and the floating speed were investigated and the results are shown in Table 1. .
【００３８】[0038]
【表１】 [Table 1]
【００３９】表１より、本発明によれば、不粘着化した
塗料スラッジを循環水槽内で効率的に浮上分離すること
ができ、塗料スラッジの沈降、堆積による問題を解消す
ることができることがわかる。From Table 1, it can be seen that according to the present invention, the tack-free paint sludge can be efficiently floated and separated in the circulating water tank, and the problems due to the sedimentation and accumulation of paint sludge can be solved. .
【００４０】[0040]
【発明の効果】以上詳述した通り、本発明の塗装ブース
循環水の処理方法及び塗装ブース処理剤によれば、塗装
ブース循環水系内において不粘着化した塗料スラッジ
を、循環水槽内で効率的に浮上させて分離することによ
り、系内の塗料スラッジの沈降、堆積量、更には保有ス
ラッジ量を大幅に低減させることができる。これによ
り、塗装ブース循環水系の保守管理に要する手間と時間
を大幅に軽減し、安定処理を可能とすると共に、塗料ス
ラッジの回収効率も高めることができる。As described in detail above, according to the coating booth circulating water treatment method and the coating booth treating agent of the present invention, the paint sludge detackified in the coating booth circulating water system can be efficiently treated in the circulating water tank. It is possible to greatly reduce the amount of paint sludge settling and depositing in the system, and further the amount of retained sludge, by floating and separating. As a result, the labor and time required for maintenance and management of the circulating water system of the coating booth can be significantly reduced, stable treatment can be performed, and the efficiency of collecting paint sludge can be improved.
【図１】湿式塗装ブースの循環水系を説明する系統図で
ある。FIG. 1 is a system diagram illustrating a circulating water system of a wet coating booth.
１ 循環水槽 ２ 湿式塗装ブース ３ 遠心分離機 1 circulating water tank 2 Wet coating booth 3 centrifuge
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ０５Ｂ 15/12 Ｂ０５Ｂ 15/12 (72)発明者 大熊 清 東京都新宿区西新宿三丁目４番７号 栗田 工業株式会社内 Ｆターム(参考） 4D032 AC01 DA04 4D037 AA08 AB02 BA01 BB08 4D073 AA01 BB03 DD01 DD40 4H011 AA02 BA01 BB04 BB09 DA12 DD01 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) B05B 15/12 B05B 15/12 (72) Inventor Kiyoshi Okuma 3-4-7 Nishishinjuku, Shinjuku-ku, Tokyo Kurita Industry Co., Ltd. F term (reference) 4D032 AC01 DA04 4D037 AA08 AB02 BA01 BB08 4D073 AA01 BB03 DD01 DD40 4H011 AA02 BA01 BB04 BB09 DA12 DD01
Claims (3)
塗料を不粘着化する薬剤及びカチオン性樹脂エマルショ
ンを添加することを特徴とする塗装ブース循環水の処理
方法。1. A method for treating circulating water in a coating booth, which comprises adding to the circulating water in a coating booth a chemical for detackifying excess paint in the circulating water and a cationic resin emulsion.
チオン基を有するモノマーの重合体を水性エマルション
として水に乳化したものであって、 更に前記重合体が、ジメチルアミノエチルアクリレー
ト、ジメチルアミノエチルメタクリレート、ジメチルア
ミノエチルアクリレートの４級化合物、ジメチルアミノ
エチルメタクリレートの４級化合物、メタクリルアミド
プロピルトリメチルアンモニウムクロライド、ジメチル
アミノプロピルメタクリルアミド、２−ヒドロキシ−３
−メタクリルオキシプロピルメチルアンモニウムクロラ
イド、及びビニルピリジンよりなる群から選ばれる１種
又は２種以上のモノマー単位を含有していることを特徴
とする請求項１に記載の塗装ブース循環水の処理方法。2. The cationic resin emulsion is obtained by emulsifying a polymer of a monomer having a cationic group in water as an aqueous emulsion, wherein the polymer is dimethylaminoethyl acrylate, dimethylaminoethyl methacrylate, dimethyl. Aminoethyl acrylate quaternary compound, dimethylaminoethyl methacrylate quaternary compound, methacrylamidopropyl trimethyl ammonium chloride, dimethylaminopropyl methacrylamide, 2-hydroxy-3
The method for treating circulating water in a coating booth according to claim 1, characterized in that it contains one or more monomer units selected from the group consisting of methacryloxypropylmethylammonium chloride and vinylpyridine.
ことを特徴とする塗装ブース処理剤。3. A coating booth treating agent containing a cationic resin emulsion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001266035A JP2003071434A (en) | 2001-09-03 | 2001-09-03 | Method for treating recirculated water in spray booth and treating agent for spray booth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001266035A JP2003071434A (en) | 2001-09-03 | 2001-09-03 | Method for treating recirculated water in spray booth and treating agent for spray booth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003071434A true JP2003071434A (en) | 2003-03-11 |
Family
ID=19092412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001266035A Pending JP2003071434A (en) | 2001-09-03 | 2001-09-03 | Method for treating recirculated water in spray booth and treating agent for spray booth |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003071434A (en) |
Cited By (6)
| 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 |
| JP2009269024A (en) * | 2008-04-11 | 2009-11-19 | Mac Technical Systems Kk | Flotation method for cleaning circulating water of wet paint booth by using air bubble |
| JP2011072866A (en) * | 2009-09-29 | 2011-04-14 | Kurita Water Ind Ltd | Treatment method of wet coating booth circulating water |
| JP2011194306A (en) * | 2010-03-18 | 2011-10-06 | Kurita Water Ind Ltd | Method for treating wet coating booth-circulating water |
| CN102762502A (en) * | 2010-02-25 | 2012-10-31 | 阿尔法拉瓦尔股份有限公司 | Exhaust gas and gas scrubber fluid cleaning equipment and method |
| JP2013188658A (en) * | 2012-03-13 | 2013-09-26 | Parker Corp | Paint mist treatment agent for wet paint booth circulating water, and wet paint booth circulating water recovery apparatus |
-
2001
- 2001-09-03 JP JP2001266035A patent/JP2003071434A/en active Pending
Cited By (9)
| 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 |
| JP2009269024A (en) * | 2008-04-11 | 2009-11-19 | Mac Technical Systems Kk | Flotation method for cleaning circulating water of wet paint booth by using air bubble |
| JP4590481B2 (en) * | 2008-04-11 | 2010-12-01 | マックテクニカルシステムズ株式会社 | Floating separation purification method using air bubbles in wet paint booth circulating water |
| JP2011072866A (en) * | 2009-09-29 | 2011-04-14 | Kurita Water Ind Ltd | Treatment method of wet coating booth circulating water |
| CN102762502A (en) * | 2010-02-25 | 2012-10-31 | 阿尔法拉瓦尔股份有限公司 | Exhaust gas and gas scrubber fluid cleaning equipment and method |
| CN105156179A (en) * | 2010-02-25 | 2015-12-16 | 阿尔法拉瓦尔股份有限公司 | Exhaust gas and gas scrubber fluid cleaning equipment and method |
| US9266055B2 (en) | 2010-02-25 | 2016-02-23 | Alfa Laval Corporate Ab | Exhaust gas and gas scrubber fluid cleaning equipment and method |
| JP2011194306A (en) * | 2010-03-18 | 2011-10-06 | Kurita Water Ind Ltd | Method for treating wet coating booth-circulating water |
| JP2013188658A (en) * | 2012-03-13 | 2013-09-26 | Parker Corp | Paint mist treatment agent for wet paint booth circulating water, and wet paint booth circulating water recovery apparatus |
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