JP6949543B2 - Anti-corrosive paint composition - Google Patents
Anti-corrosive paint composition Download PDFInfo
- Publication number
- JP6949543B2 JP6949543B2 JP2017088116A JP2017088116A JP6949543B2 JP 6949543 B2 JP6949543 B2 JP 6949543B2 JP 2017088116 A JP2017088116 A JP 2017088116A JP 2017088116 A JP2017088116 A JP 2017088116A JP 6949543 B2 JP6949543 B2 JP 6949543B2
- Authority
- JP
- Japan
- Prior art keywords
- rust
- chelating agent
- coating composition
- solvent
- agent
- 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.)
- Active
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- 239000003973 paint Substances 0.000 title description 14
- 239000000203 mixture Substances 0.000 title description 13
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 98
- 239000008199 coating composition Substances 0.000 claims description 55
- 230000003449 preventive effect Effects 0.000 claims description 53
- 239000002738 chelating agent Substances 0.000 claims description 45
- 239000002904 solvent Substances 0.000 claims description 44
- 229910052751 metal Inorganic materials 0.000 claims description 24
- 239000002184 metal Substances 0.000 claims description 24
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- KXDHJXZQYSOELW-UHFFFAOYSA-N Carbamic acid Chemical compound NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 8
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- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 4
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- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 4
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- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 3
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- 239000000454 talc Substances 0.000 description 3
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- XNCSCQSQSGDGES-UHFFFAOYSA-N 2-[2-[bis(carboxymethyl)amino]propyl-(carboxymethyl)amino]acetic acid Chemical compound OC(=O)CN(CC(O)=O)C(C)CN(CC(O)=O)CC(O)=O XNCSCQSQSGDGES-UHFFFAOYSA-N 0.000 description 2
- GJYCVCVHRSWLNY-UHFFFAOYSA-N 2-butylphenol Chemical compound CCCCC1=CC=CC=C1O GJYCVCVHRSWLNY-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
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- YNAVUWVOSKDBBP-UHFFFAOYSA-N Morpholine Chemical compound C1COCCN1 YNAVUWVOSKDBBP-UHFFFAOYSA-N 0.000 description 2
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- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 239000005083 Zinc sulfide Substances 0.000 description 1
- WPWNSTTVSOUHRP-UHFFFAOYSA-N [1-(aminomethyl)naphthalen-2-yl]methanamine Chemical compound C1=CC=CC2=C(CN)C(CN)=CC=C21 WPWNSTTVSOUHRP-UHFFFAOYSA-N 0.000 description 1
- GKXVJHDEWHKBFH-UHFFFAOYSA-N [2-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=CC=C1CN GKXVJHDEWHKBFH-UHFFFAOYSA-N 0.000 description 1
- ISKQADXMHQSTHK-UHFFFAOYSA-N [4-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=C(CN)C=C1 ISKQADXMHQSTHK-UHFFFAOYSA-N 0.000 description 1
- YDONNITUKPKTIG-UHFFFAOYSA-N [Nitrilotris(methylene)]trisphosphonic acid Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CP(O)(O)=O YDONNITUKPKTIG-UHFFFAOYSA-N 0.000 description 1
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- FJMNNXLGOUYVHO-UHFFFAOYSA-N aluminum zinc Chemical compound [Al].[Zn] FJMNNXLGOUYVHO-UHFFFAOYSA-N 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 125000004202 aminomethyl group Chemical group [H]N([H])C([H])([H])* 0.000 description 1
- 230000003254 anti-foaming effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 description 1
- HFACYLZERDEVSX-UHFFFAOYSA-N benzidine Chemical group C1=CC(N)=CC=C1C1=CC=C(N)C=C1 HFACYLZERDEVSX-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- ZLSMCQSGRWNEGX-UHFFFAOYSA-N bis(4-aminophenyl)methanone Chemical compound C1=CC(N)=CC=C1C(=O)C1=CC=C(N)C=C1 ZLSMCQSGRWNEGX-UHFFFAOYSA-N 0.000 description 1
- MRNZSTMRDWRNNR-UHFFFAOYSA-N bis(hexamethylene)triamine Chemical compound NCCCCCCNCCCCCCN MRNZSTMRDWRNNR-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- UMUXBDSQTCDPJZ-UHFFFAOYSA-N chromium titanium Chemical compound [Ti].[Cr] UMUXBDSQTCDPJZ-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- VKIRRGRTJUUZHS-UHFFFAOYSA-N cyclohexane-1,4-diamine Chemical compound NC1CCC(N)CC1 VKIRRGRTJUUZHS-UHFFFAOYSA-N 0.000 description 1
- YQLZOAVZWJBZSY-UHFFFAOYSA-N decane-1,10-diamine Chemical compound NCCCCCCCCCCN YQLZOAVZWJBZSY-UHFFFAOYSA-N 0.000 description 1
- WMWXXXSCZVGQAR-UHFFFAOYSA-N dialuminum;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3] WMWXXXSCZVGQAR-UHFFFAOYSA-N 0.000 description 1
- KEIQPMUPONZJJH-UHFFFAOYSA-N dicyclohexylmethanediamine Chemical compound C1CCCCC1C(N)(N)C1CCCCC1 KEIQPMUPONZJJH-UHFFFAOYSA-N 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- ZZTCPWRAHWXWCH-UHFFFAOYSA-N diphenylmethanediamine Chemical compound C=1C=CC=CC=1C(N)(N)C1=CC=CC=C1 ZZTCPWRAHWXWCH-UHFFFAOYSA-N 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N dodecane Chemical compound CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- DEFVIWRASFVYLL-UHFFFAOYSA-N ethylene glycol bis(2-aminoethyl)tetraacetic acid Chemical compound OC(=O)CN(CC(O)=O)CCOCCOCCN(CC(O)=O)CC(O)=O DEFVIWRASFVYLL-UHFFFAOYSA-N 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 1
- IZKZIDXHCDIZKY-UHFFFAOYSA-N heptane-1,1-diamine Chemical compound CCCCCCC(N)N IZKZIDXHCDIZKY-UHFFFAOYSA-N 0.000 description 1
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- WTFXARWRTYJXII-UHFFFAOYSA-N iron(2+);iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Fe+2].[Fe+3].[Fe+3] WTFXARWRTYJXII-UHFFFAOYSA-N 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- ZUBZATZOEPUUQF-UHFFFAOYSA-N isononane Chemical compound CCCCCCC(C)C ZUBZATZOEPUUQF-UHFFFAOYSA-N 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- DJQJFMSHHYAZJD-UHFFFAOYSA-N lidofenin Chemical compound CC1=CC=CC(C)=C1NC(=O)CN(CC(O)=O)CC(O)=O DJQJFMSHHYAZJD-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000006224 matting agent Substances 0.000 description 1
- RTWNYYOXLSILQN-UHFFFAOYSA-N methanediamine Chemical compound NCN RTWNYYOXLSILQN-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- LSHROXHEILXKHM-UHFFFAOYSA-N n'-[2-[2-[2-(2-aminoethylamino)ethylamino]ethylamino]ethyl]ethane-1,2-diamine Chemical compound NCCNCCNCCNCCNCCN LSHROXHEILXKHM-UHFFFAOYSA-N 0.000 description 1
- UJCISEHKQQMVCI-UHFFFAOYSA-N n,n'-bis(2-aminoethyl)-2,2-bis[(2-aminoethylamino)methyl]propane-1,3-diamine Chemical compound NCCNCC(CNCCN)(CNCCN)CNCCN UJCISEHKQQMVCI-UHFFFAOYSA-N 0.000 description 1
- FTQWRYSLUYAIRQ-UHFFFAOYSA-N n-[(octadecanoylamino)methyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCNC(=O)CCCCCCCCCCCCCCCCC FTQWRYSLUYAIRQ-UHFFFAOYSA-N 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- 229940094933 n-dodecane Drugs 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- SXJVFQLYZSNZBT-UHFFFAOYSA-N nonane-1,9-diamine Chemical compound NCCCCCCCCCN SXJVFQLYZSNZBT-UHFFFAOYSA-N 0.000 description 1
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 239000002987 primer (paints) Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- AOHJOMMDDJHIJH-UHFFFAOYSA-N propylenediamine Chemical compound CC(N)CN AOHJOMMDDJHIJH-UHFFFAOYSA-N 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000001054 red pigment Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 235000015096 spirit Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000011269 tar Substances 0.000 description 1
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 125000003258 trimethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])[*:1] 0.000 description 1
- 235000013799 ultramarine blue Nutrition 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
- 239000001052 yellow pigment Substances 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
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
- XAEWLETZEZXLHR-UHFFFAOYSA-N zinc;dioxido(dioxo)molybdenum Chemical compound [Zn+2].[O-][Mo]([O-])(=O)=O XAEWLETZEZXLHR-UHFFFAOYSA-N 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
Description
本発明は、金属の表面に対して用いられる防錆塗料組成物に関する。 The present invention relates to a rust preventive coating composition used for a metal surface.
近来、社会インフラの老朽化対策として橋梁、鉄塔などの鋼構造物の塗装メンテナンスが重要視されている。屋外構造物は長期間の暴露により塗膜表面に油、埃、ごみ、ヤニ、その他の各種汚れが付着することに加え、塗膜の劣化腐食により鋼製の基材から生じる錆（赤錆）の発生があり、これらをケレンにより取り除く塗替え塗装が行われている。特に鋼構造物は適切に錆（赤錆）を除去することが重要であるが、ボルト等の接合部や鋼材が組み合わさった角部、あるいは、中空部分は、電動工具が使えずブラシやサンドペーパーなどを用いて手動で錆（赤錆）を除去しなければならないので、作業が非効率になる。そこで、ケレンをせず、塗布するだけで鋼材の表面の赤錆を黒錆に転換させ、鋼構造物改修の省工程に寄与できる水溶性の防錆塗料組成物が提案されている（例えば、特許文献１参照）。特許文献１に記載された防錆塗料組成物に含まれるタンニン酸は、その水溶液において還元性リン酸系鉱酸により還元された赤錆とキレート反応し、最終的に黒錆を形成する。黒錆は赤錆と比較して粒子が小さく安定である。これにより、鋼材の表面に防錆皮膜を形成できる。 Recently, painting maintenance of steel structures such as bridges and steel towers has been regarded as important as a measure against the deterioration of social infrastructure. In addition to oil, dust, dust, tar, and various other stains adhering to the surface of the coating film due to long-term exposure to outdoor structures, rust (red rust) generated from the steel base material due to deterioration and corrosion of the coating film There are occurrences, and repainting is performed to remove these with keren. In particular, it is important to properly remove rust (red rust) from steel structures, but brushes and sandpaper cannot be used for joints such as bolts, corners where steel materials are combined, or hollow parts. Since the rust (red rust) must be manually removed by using a tool such as, the work becomes inefficient. Therefore, a water-soluble rust preventive coating composition has been proposed that can convert red rust on the surface of a steel material into black rust and contribute to the process saving of steel structure repair by simply applying it without cleaning (for example, patent). Reference 1). Tannic acid contained in the rust-preventive coating composition described in Patent Document 1 undergoes a chelate reaction with red rust reduced by reducing phosphoric acid-based mineral acid in its aqueous solution to finally form black rust. Black rust has smaller particles and is more stable than red rust. As a result, a rust preventive film can be formed on the surface of the steel material.
また、ジンクリッチペイントの鉄に対する防食効果は古くから知られており、亜鉛を高濃度で含む防食塗料組成物が使用されている（例えば特許文献２参照）。特許文献２に記載された防食塗料組成物に含まれる還元剤は、ジンクリッチペイント塗装後の鋼材表面に生じた赤錆を還元し、亜鉛粉末と鋼材との間に通電性を付与する。これにより、防食性を長時間発揮できる防食皮膜を形成できる。 Further, the anticorrosion effect of zinc rich paint on iron has been known for a long time, and an anticorrosion coating composition containing a high concentration of zinc is used (see, for example, Patent Document 2). The reducing agent contained in the anticorrosion coating composition described in Patent Document 2 reduces red rust generated on the surface of the steel material after coating with zinc rich paint, and imparts electrical conductivity between the zinc powder and the steel material. As a result, it is possible to form an anticorrosion film capable of exhibiting anticorrosion properties for a long time.
一方で、寒冷地から高温地までの屋外環境に広く対応できる溶剤系塗料組成物は、ＶＯＣ規制や作業環境に対する観点から、環境配慮志向に対応した弱溶剤に可溶な塗料組成物への需要が高まっている。 On the other hand, solvent-based paint compositions that can be widely used in outdoor environments from cold regions to high-temperature regions are in demand for weak solvent-soluble paint compositions that are environmentally friendly from the viewpoint of VOC regulations and work environment. Is increasing.
しかしながら、タンニン酸は、例えばキシレン等の強溶剤に加えターペン等の弱溶剤などに対しても十分に分散しない。そのため、タンニン酸を含んだ防錆塗料組成物は、塗料の安定性が劣り、防錆皮膜を形成できない場合がある。 However, tannic acid is not sufficiently dispersed not only in a strong solvent such as xylene but also in a weak solvent such as tarpen. Therefore, the rust-preventive coating composition containing tannic acid may have poor coating stability and may not be able to form a rust-preventive film.
一方で、特許文献２に記載された技術では、酸化物で鋼材の表面を覆ってしまうと通電性が小さく又はなくなり、ジンクリッチとしての効果（犠牲防食効果）がなくなる。そのため、特許文献２に記載された技術は、鋼材表面に防錆皮膜を形成する技術とは抜本的に思想が異なる。 On the other hand, in the technique described in Patent Document 2, if the surface of the steel material is covered with an oxide, the electrical conductivity is reduced or eliminated, and the effect as zinc rich (sacrificial anticorrosion effect) is lost. Therefore, the technique described in Patent Document 2 is drastically different from the technique of forming a rust preventive film on the surface of a steel material.
本発明は、溶剤に対しての安定性が優れ、防錆皮膜を形成できる防錆塗料組成物を提供することを目的とする。 An object of the present invention is to provide a rust-preventive coating composition having excellent stability against a solvent and capable of forming a rust-preventive film.
本発明は、金属の表面に対して用いられる防錆塗料組成物であって、エポキシ樹脂（ａ）と、キレート化剤（ｃ）とを含み、前記キレート化剤（ｃ）は、キレート金属塩、アミノカルボン酸系キレート剤及びホスホン酸系キレート剤からなる群より選ばれる少なくとも一種であり、前記キレート化剤（ｃ）の合計含有量は、前記エポキシ樹脂（ａ）の固形分に対し、０．１〜２０質量％である防錆塗料組成物に関する。 The present invention is a rust preventive coating composition used for a metal surface, which contains an epoxy resin (a) and a chelating agent (c), and the chelating agent (c) is a chelating metal salt. , At least one selected from the group consisting of an aminocarboxylic acid-based chelating agent and a phosphonic acid-based chelating agent, and the total content of the chelating agent (c) is 0 with respect to the solid content of the epoxy resin (a). .. 1 to 20% by mass of anti-corrosion coating composition.
また、ポリアミン（ｂ）を更に含むことが好ましい。 Further, it is preferable that the polyamine (b) is further contained.
また、弱溶剤を更に含むことが好ましい。 Further, it is preferable to further contain a weak solvent.
また、前記キレート化剤（ｃ）は、アミノカルボン酸系キレート剤であることが好ましい。 Further, the chelating agent (c) is preferably an aminocarboxylic acid-based chelating agent.
本発明によれば、溶剤に対しての安定性が優れ、防錆皮膜を形成できる防錆塗料組成物を提供することができる。 According to the present invention, it is possible to provide a rust-preventive coating composition having excellent stability against a solvent and capable of forming a rust-preventive film.
以下、本発明の実施形態について説明する。なお、本発明は以下の実施形態に限定されない。
本実施形態に係る防錆塗料組成物は、金属の表面に対して用いられる。なお、上記防錆塗料組成物は、鋼材に限定されず様々な金属の表面の錆を安定化するために用いることができるが、以下の説明においては、上記防錆塗料組成物が鋼材の表面に対して用いられる例について説明する。
Hereinafter, embodiments of the present invention will be described. The present invention is not limited to the following embodiments.
The rust preventive coating composition according to this embodiment is used for a metal surface. The rust preventive paint composition is not limited to the steel material and can be used to stabilize rust on the surface of various metals. However, in the following description, the rust preventive paint composition is the surface of the steel material. An example used for will be described.
上記防錆塗料組成物は、鋼材の表面に防錆皮膜を形成するために用いられる。なお、本明細書において防錆とは、鋼材の表面に析出している錆（例えば、赤錆）を安定化すること、錆（例えば、赤錆）の析出を予防することの両方の意味を含む。 The rust preventive coating composition is used to form a rust preventive film on the surface of a steel material. In addition, in this specification, rust prevention includes both meanings of stabilizing rust (for example, red rust) deposited on the surface of a steel material and preventing precipitation of rust (for example, red rust).
上記防錆塗料組成物は、金属の表面に対して用いられ、主剤（Ｉ）からなる一液型、又は主剤（Ｉ）及び硬化剤（ＩＩ）からなる二液型の塗料組成物である。また、防錆塗料組成物は、キレート化剤（ｃ）を含む。
主剤（Ｉ）は、エポキシ樹脂（ａ）を含み、硬化剤（ＩＩ）は、ポリアミン（ｂ）を含む。主剤（Ｉ）は、更に顔料やシランカップリング剤を含むことが好ましい。また、溶剤としては、ミネラルスピリット等の弱溶剤が用いられることが好ましい。
The rust preventive coating composition is used for a metal surface and is a one-component coating composition composed of a main agent (I) or a two-component coating composition composed of a main agent (I) and a curing agent (II). The rust preventive coating composition also contains a chelating agent (c).
The main agent (I) contains an epoxy resin (a), and the curing agent (II) contains a polyamine (b). The main agent (I) preferably further contains a pigment or a silane coupling agent. Further, as the solvent, it is preferable to use a weak solvent such as mineral spirit.
＜エポキシ樹脂（ａ）＞
本実施形態に係る防錆塗料組成物は、エポキシ樹脂（ａ）を含む。そのため、ミネラルスピリット等の弱溶剤にも溶解しやすく安定した防錆塗料組成物が得られる。また、ブラスト鋼板、ショップ塗装鋼板、有機ジンク塗装鋼板等の基材に対する付着性を改善することもできる。
<Epoxy resin (a)>
The rust preventive coating composition according to this embodiment contains an epoxy resin (a). Therefore, a stable rust-preventive coating composition can be obtained that is easily dissolved in a weak solvent such as mineral spirit. It is also possible to improve the adhesiveness to a base material such as a blasted steel sheet, a shop-coated steel sheet, and an organic zinc-coated steel sheet.
上記エポキシ樹脂（ａ）としては、例えば、いわゆる純エポキシ樹脂、変性エポキシ樹脂、又はこれらの混合物等が挙げられる。
純エポキシ樹脂としては、例えば、Ｄ．Ｅ．Ｒ．６７１−Ｘ７５（ダウケミカル日本株式会社製）が挙げられる。変性エポキシ樹脂としては、アラキード９２０１Ｎ（荒川化学工業株式会社製）、ターペン可溶変性エポキシ樹脂であるエピクロン ５９２０−７０ＭＳ（ＤＩＣ社製）が挙げられる。
Examples of the epoxy resin (a) include so-called pure epoxy resins, modified epoxy resins, and mixtures thereof.
Examples of the pure epoxy resin include D.I. E. R. 671-X75 (manufactured by Dow Chemical Japan Co., Ltd.) can be mentioned. Examples of the modified epoxy resin include Arakid 9201N (manufactured by Arakawa Chemical Industry Co., Ltd.) and Epicron 5920-70MS (manufactured by DIC Corporation), which is a turpen-soluble modified epoxy resin.
＜ポリアミン（ｂ）＞
ポリアミン（ｂ）は、上記防錆塗料組成物が二液型の塗料組成物である場合の硬化剤（ＩＩ）の主成分である。ポリアミン（ｂ）は、特に限定されないが、例えば、脂環式ポリアミン（ｂ−１）、脂環式ポリアミンを含まないポリアミン（ｂ−２）、アルキルフェノール（ｂ−３）を含んでもよい。また、ポリアミンは（ｂ）はミネラルスピリット等の弱溶剤に可溶な構造に変性されてもよい。
<Polyamine (b)>
The polyamine (b) is the main component of the curing agent (II) when the rust preventive coating composition is a two-component coating composition. The polyamine (b) is not particularly limited, and may include, for example, an alicyclic polyamine (b-1), a polyamine containing no alicyclic polyamine (b-2), and an alkylphenol (b-3). Further, the polyamine (b) may be modified to a structure soluble in a weak solvent such as mineral spirit.
脂環式ポリアミン（ｂ−１）としては、例えば、１，４−シクロヘキサンジアミン、４，４’−メチレンビスシクロヘキシルアミン、４，４’−イソプロピリデンビスシクロヘキシルアミン、ノルボルナジアミン、ビス（アミノメチル）シクロヘキサン、ジアミノジシクロヘキシルメタン、イソホロンジアミン、メンセンジアミン（ＭＤＡ）等が挙げられる。 Examples of the alicyclic polyamine (b-1) include 1,4-cyclohexanediamine, 4,4'-methylenebiscyclohexylamine, 4,4'-isopropylidenebiscyclohexylamine, norbornadiamine, and bis (aminomethyl). ) Cyclohexane, diaminodicyclohexylmethane, isophoronediamine, mensendiamine (MDA) and the like.
脂環式ポリアミンを含まないポリアミン（ｂ−２）としては、例えば、脂肪族系アミン、芳香族系アミン、複素環系アミン等が挙げられる。 Examples of the polyamine (b-2) containing no alicyclic polyamine include aliphatic amines, aromatic amines, and heterocyclic amines.
脂肪族系アミンとしては、例えば、アルキレンポリアミン、ポリアルキレンポリアミン、その他の脂肪族系アミン等が挙げられる。
アルキレンポリアミンとしては、例えば、Ｈ２Ｎ−Ｒ１−ＮＨ２（式中、Ｒ１は、１個以上の炭素数１〜１０の炭化水素基で置換されていてもよい炭素数１〜１２の二価の炭化水素基である。）で表されるポリアミン化合物が挙げられる。より具体的には、メチレンジアミン、エチレンジアミン、１，２−ジアミノプロパン、１，３−ジアミノプロパン、１，４−ジアミノブタン、１，５−ジアミノペンタン、１，６−ジアミノヘキサン、１，７−ジアミノヘプタン、１，８−ジアミノオクタン、１，９−ジアミノノナン、１，１０−ジアミノデカン等が挙げられる。
ポリアルキレンポリアミンとしては、例えば、ジエチレントリアミン、トリエチレンテトラミン、テトラエチレンペンタミン、ペンタエチレンヘキサミン、ヘキサメチレンテトラミン等が挙げられる。
その他の脂肪族系アミンとしては、例えば、テトラ（アミノメチル）メタン、テトラキス（２−アミノエチルアミノメチル）メタン、１，３−ビス（２’−アミノエチルアミノ）プロパン、トリエチレン−ビス（トリメチレン）ヘキサミン、ビス（３−アミノエチル）アミン、ビスヘキサメチレントリアミン［Ｈ２Ｎ（ＣＨ２）６ＮＨ（ＣＨ２）６ＮＨ２］等が挙げられる。
Examples of the aliphatic amine include alkylene polyamines, polyalkylene polyamines, and other aliphatic amines.
Examples of the alkylene polyamine include H 2 N-R 1- NH 2 (in the formula, R 1 has 1 to 12 carbon atoms which may be substituted with one or more hydrocarbon groups having 1 to 10 carbon atoms. A polyamine compound represented by a divalent hydrocarbon group) can be mentioned. More specifically, methylenediamine, ethylenediamine, 1,2-diaminopropane, 1,3-diaminopropane, 1,4-diaminobutane, 1,5-diaminopentane, 1,6-diaminohexane, 1,7- Examples thereof include diaminoheptane, 1,8-diaminooctane, 1,9-diaminononane, and 1,10-diaminodecane.
Examples of the polyalkylene polyamine include diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, hexamethylenetetramine and the like.
Examples of other aliphatic amines include tetra (aminomethyl) methane, tetrakis (2-aminoethylaminomethyl) methane, 1,3-bis (2'-aminoethylamino) propane, and triethylene-bis (trimethylene). ) Hexamine, bis (3-aminoethyl) amine, bishexamethylenetriamine [H 2 N (CH 2 ) 6NH (CH 2 ) 6NH 2 ] and the like can be mentioned.
芳香族系アミンとしては、例えば、ビス（アミノアルキル）ベンゼン、ビス（アミノアルキル）ナフタレン、ベンゼン環に結合した２個以上の１級アミノ基を有する芳香族ポリアミン化合物、及びその他の芳香族系ポリアミン化合物等が挙げられる。芳香族系アミンは特に限定されるものではないが、より具体的には、ビス（シアノエチル）ジエチレントリアミン、ｏ−キシリレンジアミン、ｍ−キシリレンジアミン（ＭＸＤＡ）、ｐ−キシリレンジアミン、フェニレンジアミン、ナフチレンジアミン、ジアミノジフェニルメタン、ジアミノジエチルフェニルメタン、２，２−ビス（４−アミノフェニル）プロパン、４，４’−ジアミノジフェニルエーテル、４，４’−ジアミノベンゾフェノン、４，４’−ジアミノジフェニルスルホン、２，２’−ジメチル−４，４’−ジアミノジフェニルメタン、２，４’−ジアミノビフェニル、２，３’−ジメチル−４，４’−ジアミノビフェニル、３，３’−ジメトキシ−４，４’−ジアミノビフェニル、ビス（アミノメチル）ナフタレン、ビス（アミノエチル）ナフタレン等が挙げられる。 Examples of the aromatic amine include bis (aminoalkyl) benzene, bis (aminoalkyl) naphthalene, an aromatic polyamine compound having two or more primary amino groups bonded to a benzene ring, and other aromatic polyamines. Examples include compounds. The aromatic amine is not particularly limited, but more specifically, bis (cyanoethyl) diethylenetriamine, o-xylylenediamine, m-xylylenediamine (MXDA), p-xylylenediamine, phenylenediamine, etc. Naftylenediamine, diaminodiphenylmethane, diaminodiethylphenylmethane, 2,2-bis (4-aminophenyl) propane, 4,4'-diaminodiphenyl ether, 4,4'-diaminobenzophenone, 4,4'-diaminodiphenylsulfone, 2,2'-dimethyl-4,4'-diaminodiphenylmethane, 2,4'-diaminobiphenyl, 2,3'-dimethyl-4,4'-diaminobiphenyl, 3,3'-dimethoxy-4,4'- Examples thereof include diaminobiphenyl, bis (aminomethyl) naphthalene and bis (aminoethyl) naphthalene.
複素環系アミンとしては、例えば、Ｎ−メチルピペラジン［ＣＨ３−Ｎ（ＣＨ２ＣＨ２）２ＮＨ］、モルホリン［ＨＮ（ＣＨ２ＣＨ２）２Ｏ］、１，４−ビス−（８−アミノプロピル）−ピペラジン、ピペラジン−１，４−ジアザシクロヘプタン、１−（２’−アミノエチルピペラジン）、１−［２’−（２’’−アミノエチルアミノ）エチル］ピペラジン、１，１１−ジアザシクロエイコサン、１，１５−ジアザシクロオクタコサン等が挙げられる。 Examples of heterocyclic amines include N-methylpiperazine [CH 3- N (CH 2 CH 2 ) 2NH], morpholine [HN (CH 2 CH 2 ) 2O], 1,4-bis- (8-aminopropyl). )-Piperazine, piperazine-1,4-diazacycloheptane, 1- (2'-aminoethyl piperazine), 1- [2'-(2''-aminoethylamino) ethyl] piperazine, 1,11-dia Examples thereof include the cycloeikosan and 1,15-diazacyclooctakosan.
アルキルフェノール（ｂ−３）としては、例えば、メチルフェノール（ｏ，ｍ，ｐ−クレゾール）、エチルフェノール、ブチルフェノール、ターシャリブチルフェノール、オクチルフェノール、ノニルフェノール、ドデシルフェノール、ジノニルフェノール等の１価フェノールが挙げられる。
アルキルフェノール（ｂ−３）のアルキル基の炭素数は、１〜１０であることが好ましく、１〜５であることがより好ましい。
Examples of the alkylphenol (b-3) include monovalent phenols such as methylphenol (o, m, p-cresol), ethylphenol, butylphenol, tertiary butylphenol, octylphenol, nonylphenol, dodecylphenol, and dinonylphenol.
The alkyl group of the alkylphenol (b-3) preferably has 1 to 10 carbon atoms, more preferably 1 to 5 carbon atoms.
＜キレート化剤（ｃ）＞
本実施形態に係るキレート化剤（ｃ）は、鋼材表面の赤錆に含まれる３価の鉄イオン（Ｆｅ３＋）とキレート反応し、黒錆（Ｆｅ２Ｏ３）を形成する。これにより、防錆効果が高い（特に、鋼材の表面に析出している錆（赤錆）を安定化する効果が高い）皮膜を形成できる。なお、本明細書において、上記キレート化剤（ｃ）は、タンニン酸やその金属塩を含まないものとして説明する。
<Chelating agent (c)>
The chelating agent (c) according to the present embodiment chelate-reacts with trivalent iron ions (Fe 3+ ) contained in red rust on the surface of the steel material to form black rust (Fe 2 O 3). As a result, a film having a high rust preventive effect (particularly, a high effect of stabilizing rust (red rust) deposited on the surface of the steel material) can be formed. In this specification, the chelating agent (c) will be described as not containing tannic acid or a metal salt thereof.
上記キレート化剤（ｃ）の合計含有量は、上記エポキシ樹脂（ａ）の固形分に対し０．１〜２０質量％であり、より好ましくは、１〜１５質量％である。２０質量％を超えると、塗料の安定性が劣る場合がある。また、０．１質量％未満であると、キレート化剤（ｃ）が錆の安定化に十分に寄与しない場合がある。 The total content of the chelating agent (c) is 0.1 to 20% by mass, more preferably 1 to 15% by mass, based on the solid content of the epoxy resin (a). If it exceeds 20% by mass, the stability of the paint may be inferior. If it is less than 0.1% by mass, the chelating agent (c) may not sufficiently contribute to the stabilization of rust.
上記キレート化剤（ｃ）は、キレート金属塩、アミノカルボン酸系キレート剤、ホスホン酸系キレート剤からなる群より選ばれる少なくとも一種である。この中でもアミノカルボン酸系キレート剤であることが特に好ましい。 The chelating agent (c) is at least one selected from the group consisting of a chelating metal salt, an aminocarboxylic acid-based chelating agent, and a phosphonic acid-based chelating agent. Of these, an aminocarboxylic acid-based chelating agent is particularly preferable.
キレート金属塩としては、例えば、ＥＤＴＡ金属塩、ＤＴＰＡ金属塩、その他の金属塩（例えば、ＰＤＴＡ金属塩）が挙げられる。
アミノカルボン酸系キレート剤としては、例えば、ＥＤＴＡ、ＮＴＡ、ＤＴＰＡ、ＨＥＤＴＡ、ＴＴＨＡ、ＰＤＴＡ、ＤＰＴＡ−ＯＨ、ＨＩＤＡ、ＤＨＥＧ、ＧＥＤＴＡ、ＣＭＧＡ、ＥＤＤＳ等が挙げられる。
ホスホン酸系キレート剤としては、例えば、ＨＥＤＰ、ＮＴＭＰ、ＰＢＴＣ、ＥＤＴＭＰ等が挙げられる。
Examples of the chelated metal salt include EDTA metal salt, DTPA metal salt, and other metal salts (for example, PDTA metal salt).
Examples of the aminocarboxylic acid-based chelating agent include EDTA, NTA, DTPA, HEADTA, TTHA, PDTA, DPTA-OH, HIDA, DHEG, GEDTA, CMGA, EDDS and the like.
Examples of the phosphonic acid-based chelating agent include HEDP, NTMP, PBTC, EDTMP and the like.
＜添加剤＞
本実施形態に係る防錆塗料組成物の主剤（Ｉ）には、顔料、シランカップリング剤、その他の添加剤が含有されてもよい。
<Additives>
The main agent (I) of the rust preventive coating composition according to the present embodiment may contain a pigment, a silane coupling agent, and other additives.
顔料としては、体質顔料、着色顔料、防錆顔料のうちの１種のみが用いられてもよく、２種以上を用いてもよい。 As the pigment, only one of the extender pigment, the coloring pigment, and the rust preventive pigment may be used, or two or more kinds may be used.
体質顔料としては、例えば、タルク、クレー、炭酸カルシウム、炭酸マグネシウム、硫酸バリウム、ケイ酸、ケイ酸塩、酸化アルミニウム水和物、硫酸カルシウム、石膏、雲母状酸化鉄（ＭＩＯ）、ガラスフレーク、スゾライト・マイカ、クラライト・マイカ等が挙げられる。石膏を用いる場合には、焼石膏（ＣａＳＯ４・１／２Ｈ２Ｏ）を含有させることで、防錆塗膜の耐水性、防食性をより向上させることができる。具体的には、商品名で「ＰＨ２００」（焼石膏、丸石石膏社製）等を用いることができる。焼石膏を用いる場合、その添加量は、防錆塗料組成物の固形分中、２〜３０質量％とすることが好ましい。２質量％未満であると、効果が認められず、３０質量％を超えると、防錆塗膜の表面への析出、白化現象が生じ、防錆塗膜の外観異常をきたす。 Examples of extender pigments include talc, clay, calcium carbonate, magnesium carbonate, barium sulfate, silicic acid, silicate, aluminum oxide hydrate, calcium sulfate, gypsum, mica-like iron oxide (MIO), glass flakes, and suzolite.・ Mica, clarite, mica, etc. can be mentioned. When using the plaster, by the inclusion of calcined gypsum (CaSO 4 · 1 / 2H 2 O), it is possible to further improve water resistance of Bosabinurimaku, corrosion resistance. Specifically, "PH 200 " (Yaki gypsum, manufactured by Maruishi Gypsum Co., Ltd.) or the like can be used as a trade name. When gypsum is used, the amount added is preferably 2 to 30% by mass based on the solid content of the rust preventive coating composition. If it is less than 2% by mass, no effect is observed, and if it exceeds 30% by mass, precipitation and whitening of the rust-preventive coating film occur, and the appearance of the rust-preventive coating film becomes abnormal.
着色顔料としては、酸化チタン、カーボンブラック、鉛白、黒鉛、硫化亜鉛、酸化亜鉛（亜鉛華）、酸化クロム、黄色ニッケルチタン、黄色クロムチタン、黄色酸化鉄、赤色酸化鉄、黒色酸化鉄、フタロシアニンブルー、フタロシアニングリーン、ウルトラマリンブルー、キナクリドン類、アゾ系赤・黄色顔料等が挙げられる。 Color pigments include titanium oxide, carbon black, lead white, graphite, zinc sulfide, zinc oxide (zinc white), chromium oxide, yellow nickel titanium, yellow chromium titanium, yellow iron oxide, red iron oxide, black iron oxide, and phthalocyanine. Examples include blue, phthalocyanine green, ultramarine blue, quinacridones, and azo red / yellow pigments.
防錆顔料としては、モリブデン酸亜鉛、モリブデン酸アルミニウム、亜鉛末（Ｚｎ）、リン酸亜鉛、アルミ粉（Ａｌ）等が挙げられる。
防錆顔料により、防錆効果が高い（特に、鋼材の表面に錆（赤錆）の析出を予防する効果が高い）皮膜を形成できる。
Examples of the rust preventive pigment include zinc molybdate, aluminum molybdate, zinc powder (Zn), zinc phosphate, aluminum powder (Al) and the like.
The rust preventive pigment can form a film having a high rust preventive effect (particularly, a high effect of preventing the precipitation of rust (red rust) on the surface of the steel material).
シランカップリング剤は、有機ポリマー（硬化樹脂等）に対して反応性及び／又は親和性を示す有機官能基と、無機系材料（防錆塗料組成物に含有される顔料等）に対して反応性及び／又は親和性を示す有機官能基とを併せ持つ化合物である。シランカップリング剤を用いることにより、有機ポリマーと無機系材料とが接する界面の接着性等を向上させることが可能となる。また、例えば、リメトキシシリル基又はトリエトキシシリル基を有する化合物を用いることにより、防錆塗膜の防食性や基材との付着性を向上させることができる。 The silane coupling agent reacts with an organic functional group exhibiting reactivity and / or affinity with an organic polymer (cured resin, etc.) and an inorganic material (pigment, etc. contained in a rust preventive coating composition). It is a compound having an organic functional group exhibiting sex and / or affinity. By using a silane coupling agent, it is possible to improve the adhesiveness of the interface between the organic polymer and the inorganic material. Further, for example, by using a compound having a remethoxysilyl group or a triethoxysilyl group, the corrosion resistance of the rust preventive coating film and the adhesion to the substrate can be improved.
本発明においては、シランカップリング剤として、１種又は２種以上のシランカップリング剤を用いることができる。シランカップリング剤は、主剤（Ｉ）の総質量に対して、０．５〜５質量％の割合で用いられることが好ましい。この割合でシランカップリング剤を用いることにより、防錆塗料組成物から形成される防錆塗膜と基材との付着性や防錆塗膜の耐膨れ性をより優れたものとすることができる。 In the present invention, one kind or two or more kinds of silane coupling agents can be used as the silane coupling agent. The silane coupling agent is preferably used in a proportion of 0.5 to 5% by mass with respect to the total mass of the main agent (I). By using a silane coupling agent in this ratio, the adhesion between the rust-preventive coating film formed from the rust-preventive coating composition and the base material and the swelling resistance of the rust-preventive coating film can be made more excellent. can.
その他の主剤（Ｉ）に対する添加剤としては例えば、併用樹脂、タレ止め・沈降防止剤、色分れ防止剤、消泡・ワキ防止剤、レベリング剤、ツヤ消し剤等が挙げられる。 Examples of the additive to the other main agent (I) include a combined resin, a sagging / sedimentation inhibitor, a color separation inhibitor, a defoaming / armpit inhibitor, a leveling agent, a matting agent, and the like.
併用樹脂としては、例えば、石油系樹脂（キシレン樹脂等）、アクリル樹脂、ポリエステル樹脂等を用いることができる。これらの併用樹脂を用いることにより、防錆塗膜の物性を改善することができる。 As the combined resin, for example, a petroleum-based resin (xylene resin or the like), an acrylic resin, a polyester resin or the like can be used. By using these combined resins, the physical characteristics of the rust preventive coating film can be improved.
タレ止め・沈降防止剤としては、当該分野において通常用いられるものを用いることができ、例えば、商品名で「ディスパロン ６７００」（脂肪族ビスアマイド揺変剤、楠本化成社製）等を好ましく用いることができる。色分れ防止剤としては、例えば、商品名で「ディスパロン ２１００」（シリコン添加脂肪族系多価カルボン酸、楠本化成社製）等を好ましく用いることができる。消泡・ワキ防止剤としては、例えば、商品名で「ディスパロン １９５０」（特殊ビニル系重合物、楠本化成社製）等を好ましく用いることができる。 As the anti-sagging / sedimentation inhibitor, those usually used in the art can be used. For example, "Disparon 6700" (aliphatic bisamide rocking agent, manufactured by Kusumoto Kasei Co., Ltd.) or the like under the trade name is preferably used. can. As the color separation inhibitor, for example, "Disparon 2100" (silicon-added aliphatic polyvalent carboxylic acid, manufactured by Kusumoto Kasei Co., Ltd.) or the like can be preferably used under the trade name. As the antifoaming / armpit inhibitor, for example, "Disparon 1950" (special vinyl polymer, manufactured by Kusumoto Kasei Co., Ltd.) under the trade name can be preferably used.
その他の主剤（Ｉ）に対する添加剤として、塗料の安定性に影響のない範囲でタンニン酸ナトリウムを用いることもできる。タンニン酸ナトリウムにより、防錆効果が高い（特に、鋼材の表面に析出している錆（赤錆）を安定化する効果が高い）皮膜を形成できる。 As an additive to the other main agent (I), sodium tannate can also be used as long as it does not affect the stability of the coating material. Sodium tannate can form a film having a high rust preventive effect (particularly, a high effect of stabilizing rust (red rust) deposited on the surface of a steel material).
＜溶剤＞
本実施形態に係る防錆塗料組成物は、溶剤として弱溶剤を含むことが好ましい。防錆塗料組成物が二液型の防錆塗料組成物の場合、主剤（Ｉ）又は硬化剤（ＩＩ）の少なくともいずれか一方の溶剤として弱溶剤が用いられることが好ましく、主剤（Ｉ）及び硬化剤（ＩＩ）の溶剤として弱溶剤が用いられてもよい。
<Solvent>
The rust preventive coating composition according to the present embodiment preferably contains a weak solvent as the solvent. When the rust-preventive coating composition is a two-component rust-preventive coating composition, a weak solvent is preferably used as a solvent for at least one of the main agent (I) and the curing agent (II), and the main agent (I) and A weak solvent may be used as the solvent for the curing agent (II).
弱溶剤とは、脂肪族炭化水素系溶剤であり、ミネラルスピリットやターペン等に代表されるような高引火点、高沸点、低有害性であるものをいう。より具体的な弱溶剤としては、ミネラルスピリット、ホワイトスピリット、ミネラルターペン、イソパラフィン、ソルベント灯油、ＶＭ＆Ｐナフサ、ソルベントナフサ等が挙げられる。 The weak solvent is an aliphatic hydrocarbon solvent having a high flash point, a high boiling point, and a low toxicity as typified by mineral spirits and turpens. More specific weak solvents include mineral spirit, white spirit, mineral tarpen, isoparaffin, solvent kerosene , VM & P naphtha, solvent naphtha and the like.
弱溶剤の市販品としては、いずれも商品名で「ソルベッソ１００」、「ソルベッソ１５０」、「ソルベッソ２００」（いずれもエッソ石油社製）や、いずれも商品名で「スワゾール３１０」、「スワゾール１０００」、「スワゾール１５００」（いずれもコスモ石油社製）等が挙げられる。この他、単成分溶剤としてはｎ−ブタン、ｎ−ヘキサン、ｎ−ヘプタン、ｎ−オクタン、イソノナン、ｎ−デカン、ｎ−ドデカン、シクロペンタン、シクロヘキサン、シクロブタン等の脂肪族炭化水素類等が挙げられる。 As commercial products of weak solvents, the product names are "Solbesso 100", "Solbesso 150", "Solvesso 200" (all manufactured by Esso Oil Co., Ltd.), and the product names are "Swazole 310" and "Swazole 1000". , "Swazole 1500" (both manufactured by Cosmo Oil Co., Ltd.) and the like. In addition, examples of the single component solvent include aliphatic hydrocarbons such as n-butane, n-hexane, n-heptane, n-octane, isononan, n-decane, n-dodecane, cyclopentane, cyclohexane, and cyclobutane. Be done.
主剤（Ｉ）の溶剤としての弱溶剤は、主剤（Ｉ）の総質量に対して、５〜５０質量％含まれることが好ましい。弱溶剤が５〜５０質量％含まれることにより、塗り重ね性を向上させる効果、臭気を低減させる効果、外観異常（ちぢみ）を抑制させる効果を十分に得ることができる。 The weak solvent as the solvent of the main agent (I) is preferably contained in an amount of 5 to 50% by mass with respect to the total mass of the main agent (I). By containing 5 to 50% by mass of the weak solvent, it is possible to sufficiently obtain the effect of improving the recoatability, the effect of reducing the odor, and the effect of suppressing the appearance abnormality (smallness).
上記防錆塗料組成物が主剤（Ｉ）及び硬化剤（ＩＩ）からなる二液型の塗料組成物である場合、主剤（Ｉ）及び硬化剤（ＩＩ）の調製方法としては、特別の方法を必要とせず、当業者において通常用いられる方法を使用することができる。上記調製方法としては特に限定されず、例えば主剤（Ｉ）の調製方法としては、エポキシ樹脂（ａ）と、キレート化剤（ｃ）、更に必要に応じて上述した顔料、シランカップリング剤、その他の添加剤等のその他の成分を混入し、ディスパー、ボールミル、Ｓ．Ｇ．ミル、ロールミル等の分散機で混合・分散することにより調製する方法を挙げることができる。 When the rust preventive coating composition is a two-component coating composition composed of a main agent (I) and a curing agent (II), a special method is used as a method for preparing the main agent (I) and the curing agent (II). It is not necessary and the methods commonly used by those skilled in the art can be used. The preparation method is not particularly limited, and for example, the preparation method of the main agent (I) includes an epoxy resin (a), a chelating agent (c), and if necessary, a pigment, a silane coupling agent, and the like described above. Incorporating other ingredients such as additives from Dispar, Ball Mill, S.A. G. Examples thereof include a method of preparing by mixing and dispersing with a disperser such as a mill or a roll mill.
＜塗装方法＞
本実施形態に係る防錆塗料組成物の塗装は、刷毛、ローラー、スプレー等の一般的な方法により行なうことができる。防錆塗料組成物が二液型の防錆塗料組成物である場合、使用する直前に、主剤（Ｉ）と硬化剤（ＩＩ）とを混合することにより得られる塗料を、上記方法を用いて塗布する。かかる主剤（Ｉ）と硬化剤（ＩＩ）とを混合することにより得られる塗料の塗装は、主剤（Ｉ）と硬化剤（ＩＩ）との混合後、可使時間内に行なう。本実施形態に係る防錆塗料組成物は、典型的には、３０分〜８時間程度の可使時間を示す。溶剤の量によっては、２〜８時間程度を示す。塗装を行なった後は、エポキシ基−アミノ基間の硬化反応やシランカップリング剤によるカップリング反応等が進行することによって硬化反応が進行するため、低温硬化性が優れた防錆塗料組成物を得ることができる。
<Painting method>
The rust preventive coating composition according to the present embodiment can be coated by a general method such as a brush, a roller, or a spray. When the rust preventive paint composition is a two-component rust preventive paint composition, a paint obtained by mixing the main agent (I) and the curing agent (II) immediately before use can be obtained by using the above method. Apply. The coating material obtained by mixing the main agent (I) and the curing agent (II) is applied within the pot life after the main agent (I) and the curing agent (II) are mixed. The rust preventive coating composition according to the present embodiment typically exhibits a pot life of about 30 minutes to 8 hours. Depending on the amount of solvent, it takes about 2 to 8 hours. After coating, the curing reaction proceeds as the curing reaction between the epoxy group and the amino group and the coupling reaction with the silane coupling agent proceed, so that a rust-preventive coating composition having excellent low-temperature curability can be obtained. Obtainable.
＜被塗物＞
被塗物（本実施形態に係る防錆塗料組成物が塗装される対象物）としては、防錆を必要とする鋼材（金属）であれば特に限定されるものではないが、例えば、船舶、車両（例えば、鉄道車両、大型車両）、航空機、橋梁、海上構築物、プラント、タンク（例えば、石油タンク）、パイプ、鋼管、鋳鉄管等、又は鋼製構造物、建築物等の鋼材（金属）が挙げられる。また、旧塗膜の残る被塗物に対して適用された場合にも、防錆塗料組成物は良好な防錆皮膜を形成できる。
<Object to be coated>
The object to be coated (the object to which the rust preventive coating composition according to the present embodiment is coated) is not particularly limited as long as it is a steel material (metal) that requires rust prevention, but for example, a ship or the like. Vehicles (for example, railroad vehicles, large vehicles), aircraft, bridges, marine structures, plants, tanks (for example, oil tanks), pipes, steel pipes, cast iron pipes, etc., or steel structures (metals) such as steel structures and buildings. Can be mentioned. Further, the rust preventive coating composition can form a good rust preventive film even when applied to an object to be coated in which the old coating film remains.
被塗物の表面は、予めブラスト処理されたものであってもよく、さび止め塗装、ショップ塗装、有機又は無機ジンクプライマー塗装が施されたものであってもよい。 The surface of the object to be coated may be previously blasted, or may have been subjected to rust preventive coating, shop coating, or organic or inorganic zinc primer coating.
以上説明したように、本実施形態における防錆塗料組成物は、金属の表面に対して用いられる防錆塗料組成物であって、エポキシ樹脂（ａ）と、キレート化剤（ｃ）とを含み、キレート化剤（ｃ）は、キレート金属塩、アミノカルボン酸系キレート剤及びホスホン酸系キレート剤からなる群より選ばれる少なくとも一種であり、キレート化剤（ｃ）の合計含有量は、エポキシ樹脂（ａ）の固形分に対し、０．１〜２０質量％である。これにより、溶剤に対しての安定性が優れ、防錆性が高い皮膜（防錆皮膜）を形成できる。 As described above, the rust-preventive coating composition in the present embodiment is a rust-preventive coating composition used for a metal surface, and contains an epoxy resin (a) and a chelating agent (c). , The chelating agent (c) is at least one selected from the group consisting of a chelating metal salt, an aminocarboxylic acid-based chelating agent and a phosphonic acid-based chelating agent, and the total content of the chelating agent (c) is an epoxy resin. It is 0.1 to 20% by mass with respect to the solid content of (a). As a result, a film (rust-preventive film) having excellent stability against a solvent and high rust-preventive property can be formed.
また、防錆塗料組成物は、ポリアミン（ｂ）を更に含む。これにより、防錆塗料組成物を二液型の塗料組成物として用いることができる。 The rust preventive coating composition further contains a polyamine (b). Thereby, the rust preventive coating composition can be used as a two-component coating composition.
また、防錆塗料組成物は、弱溶剤を更に含む。これにより、環境への負荷を低減できる。 The rust preventive coating composition further contains a weak solvent. As a result, the load on the environment can be reduced.
また、キレート化剤（ｃ）は、アミノカルボン酸系キレート剤である。そのため、キレート化剤（ｃ）は、鋼材表面の赤錆に含まれる３価の鉄イオン（Ｆｅ３＋）と十分にキレート反応し、黒錆（Ｆｅ２Ｏ３）を形成する。これにより、より防錆効果が高い皮膜（防錆皮膜）を形成できる。 The chelating agent (c) is an aminocarboxylic acid-based chelating agent. Therefore, the chelating agent (c) sufficiently chelate with the trivalent iron ions (Fe 3+ ) contained in the red rust on the surface of the steel material to form black rust (Fe 2 O 3). As a result, a film having a higher rust preventive effect (rust preventive film) can be formed.
本発明は上記実施形態に限定されるものではなく、本発明の目的を達成できる範囲での変形、改良等は本発明に含まれる。 The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the range in which the object of the present invention can be achieved are included in the present invention.
例えば、上記防錆塗料組成物は、上記キレート化剤（ｃ）として、タンニン酸やその金属塩を含まない例について説明をしたが、添加剤等としてタンニン酸やその金属塩をとして含んでもよい。 For example, although the example in which the rust preventive coating composition does not contain tannic acid or a metal salt thereof as the chelating agent (c) has been described, tannic acid or a metal salt thereof may be contained as an additive or the like. ..
以下に、実施例に基づいて本発明をより詳細に説明するが、本発明はこれらの実施例によって限定されるものではない。 Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples.
＜実施例１＞
エポキシ樹脂（ａ）としての変性エポキシ樹脂１００質量％と、キレート化剤（ｃ）２．５質量％と、防錆顔料４０質量％と、体質顔料４０質量％と、溶剤２００質量％とを混合・分散することにより、実施例１の防錆塗料組成物を得た。
<Example 1>
A mixture of 100% by mass of the modified epoxy resin as the epoxy resin (a), 2.5% by mass of the chelating agent (c), 40% by mass of the rust preventive pigment, 40% by mass of the extender pigment, and 200% by mass of the solvent. -By dispersing, the rust preventive coating composition of Example 1 was obtained.
＜実施例２〜１３＞
硬化剤（ＩＩ）として変性ポリアミドアミンを更に加えたことを除いて実施例１と同様に、表１に示した配合を用いて、実施例２〜１３の防錆塗料組成物を得た。
<Examples 2 to 13>
The rust preventive coating compositions of Examples 2 to 13 were obtained using the formulations shown in Table 1 in the same manner as in Example 1 except that the modified polyamide amine was further added as the curing agent (II).
＜比較例１、２＞
キレート化剤としてタンニン酸ナトリウムを用いたことを除いて実施例１と同様に、表１に示した配合を用いて、比較例１、２の防錆塗料組成物を得た。
<Comparative Examples 1 and 2>
The rust preventive coating compositions of Comparative Examples 1 and 2 were obtained using the formulations shown in Table 1 in the same manner as in Example 1 except that sodium tannate was used as the chelating agent.
＜比較例３、４＞
キレート化剤（ｃ）を２５質量％含むことを除いて実施例１と同様に、表１に示した配合を用いて、比較例１、２の防錆塗料組成物を得た。
<Comparative Examples 3 and 4>
The rust preventive coating compositions of Comparative Examples 1 and 2 were obtained using the formulations shown in Table 1 in the same manner as in Example 1 except that the chelating agent (c) was contained in an amount of 25% by mass.
なお、表１中の数値は、化成処理剤の各成分の含有量（質量％）を示し、表１中の各成分として以下の材料を用いた。
＜エポキシ樹脂＞
純エポキシ： Ｄ．Ｅ．Ｒ．６７１−Ｘ７５（ダウケミカル日本社製）
ターペン可溶変性エポキシ ：エピクロン ５９２０−７０ＭＳ（ＤＩＣ社製）
変性エポキシ：アラキード９２０１Ｎ（荒川化学工業社製）
＜硬化剤＞
ポリアミンＡ：バーサミド１００ＸＢ−６５（ＢＡＳＦ社製）
ポリアミンＢ：ラッカマイドＢ−２３００−９０ＭＳ（ＤＩＣ社製）
＜キレート化剤＞
ＥＤＴＡ４Ｎａ：Ｔｒｉｌｏｎ Ｂ ｐｏｗｄｅｒ（ＢＡＳＦ社製）
ＨＥＤＰ・４Ｎａ：キレストＰＨ−２１４（キレスト株式会社製）
＜タンニン酸＞
タンニン酸：タンニン酸ナトリウム（富士化学工業製）
＜添加剤＞
防錆顔料 ：ＣＬＦ−１０２（トリポリ燐酸アルミニウム亜鉛）（Ｇｕａｎｇｓｉ Ｘｉｎｊｉｎｇ Ｓｃｉａｎｃｅ＆Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，ＬＴＤ．）
体質顔料：ＳＰ−４２（タルク）（富士タルク工業社製）
＜溶剤＞
強溶剤：キシレン、プロピレングリコールモノメチルエーテル及びイソプロピルアルコールの混合物
弱溶剤：トクソル
The numerical values in Table 1 indicate the content (mass%) of each component of the chemical conversion treatment agent, and the following materials were used as each component in Table 1.
<Epoxy resin>
Pure epoxy: D. E. R. 671-X75 (Made by Dow Chemical Japan)
Turpen soluble modified epoxy: Epicron 5920-70MS (manufactured by DIC Corporation)
Modified Epoxy: Arakid 9201N (manufactured by Arakawa Chemical Industry Co., Ltd.)
<Hardener>
Polyamine A: Versamide 100XB-65 (manufactured by BASF)
Polyamine B: Lacamide B-2300-90MS (manufactured by DIC Corporation)
<Chelating agent>
EDTA4Na: Trilon B powder (manufactured by BASF)
HEDP ・ 4Na: Kirest PH-214 (manufactured by Kirest Co., Ltd.)
<Tannic acid>
Tannic acid: Sodium tannate (manufactured by Fuji Chemical Industry Co., Ltd.)
<Additives>
Anti-corrosion pigment: CLF-102 (Aluminum Zinc Tripoliphosphate) (Guangxi Xinjing Science & Technology Co., LTD.)
Constituent pigment: SP-42 (talc) (manufactured by Fuji Talc Industry Co., Ltd.)
<Solvent>
Strong solvent: Mixture of xylene, propylene glycol monomethyl ether and isopropyl alcohol Weak solvent: Toxol
＜塗料安定性＞
各実施例、比較例の防錆塗料組成物を５０℃で１か月保管した。塗料の状態を確認し、以下の評価基準で塗料安定性を評価した。結果を表１に示した。
（評価基準）
３：貯蔵時の粘度変化なし
２：粘度変化は有るが実使用可
１：実使用不可（高粘度化、硬沈降）
<Paint stability>
The rust preventive coating compositions of each Example and Comparative Example were stored at 50 ° C. for 1 month. The condition of the paint was confirmed, and the paint stability was evaluated according to the following evaluation criteria. The results are shown in Table 1.
(Evaluation criteria)
3: No change in viscosity during storage 2: There is a change in viscosity but it can be used in practice 1: It cannot be used in practice (high viscosity, hard sedimentation)
＜塗膜評価＞
ＳＳ４００鋼板（板厚１．６ｍｍ）表面をサンドブラスト研磨し、海岸地域にて３か月間曝露した板を錆板として使用した。錆板をマジックロン（登録商標，三共理化学社製）等の手工具を用いて３種ケレンし、試験用の基材とした。当該基材上に、各実施例の防錆塗料組成物の塗布量を算出し、膜厚３０μｍとなるように刷毛塗り塗装を行った。塗装後の鋼材を２３℃にて７日間養生した。これにより、塗膜評価用の各実施例の試験体を得た。なお、塗膜評価用の各比較例の試験体は、各比較例の防錆塗料組成物が実使用不可であったため、得られなかった。
<Coating film evaluation>
The surface of the SS400 steel plate (thickness 1.6 mm) was sandblasted, and the plate exposed in the coastal area for 3 months was used as a rust plate. The rust plate was used as a base material for testing by using a hand tool such as Magicron (registered trademark, manufactured by Sankyo Rikagaku Co., Ltd.) to clean three types. The coating amount of the rust-preventive coating composition of each example was calculated on the base material, and brush coating was performed so as to have a film thickness of 30 μm. The painted steel material was cured at 23 ° C. for 7 days. As a result, a test piece of each example for evaluation of the coating film was obtained. The test specimens of each Comparative Example for coating film evaluation could not be obtained because the rust preventive coating composition of each Comparative Example could not be actually used.
各実施例の試験体を用いて、ＪＩＳ Ｋ５６００−７−９のサイクルＤに準じて、６００サイクルまで複合サイクル試験を実施した。試験体に生じた一般部（試験体の塗膜中で、流れ錆を確認するためにつけた切り込み傷以外の部分）の錆の状態を確認し、ＪＩＳ Ｋ５６００−８−３（さびの等級参照）に準じた以下の評価基準で防錆性を評価した。結果を表１に示した。
（評価基準）
３：Ｒｉ（ｄｅｇｒｅｅ ＯＦ ｒｕｓｔｉｎｇ）０
２：Ｒｉ１または２
１：Ｒｉ３以上
Using the test specimens of each example, a combined cycle test was carried out up to 600 cycles according to cycle D of JIS K5600-7-9. Check the rust condition of the general part (the part other than the notch scratches made to check the flow rust in the coating film of the test piece) on the test piece, and check JIS K5600-8-3 (see rust grade). The rust prevention property was evaluated according to the following evaluation criteria according to the above. The results are shown in Table 1.
(Evaluation criteria)
3: Ri (degree OF rusting) 0
2: Ri1 or 2
1: Ri3 or higher
防錆性と同様の試験後、試験体に生じた流れ錆を確認し、以下の評価基準で錆の安定化を評価した。結果を表１に示した。
（評価基準）
３：流れ錆なし（カット部周囲に滞留なし）
２：カット部周囲に滞留あり
１：流れ錆あり
After the same test as the rust prevention property, the flow rust generated on the test piece was confirmed, and the stabilization of rust was evaluated according to the following evaluation criteria. The results are shown in Table 1.
(Evaluation criteria)
3: No flow rust (no retention around the cut part)
2: There is retention around the cut part 1: There is flow rust
各実施例の試験体を用いて、ＪＩＳ Ｋ５６００−７−２に準じた耐湿性試験機により５０℃で試験を実施した。２週間後に各実施例の試験体を引き上げ、塗膜の膨れ状態を確認し、ＪＩＳ Ｋ５６００−８−２（膨れの等級参照）に準じた以下の評価基準で塗膜の耐水性を評価した。結果を表１に示した。
（評価基準）
３：Ｒｉ（ｄｅｇｒｅｅ ＯＦ ｒｕｓｔｉｎｇ）０
２：Ｒｉ１または２
１：Ｒｉ３以上
Using the test body of each example, the test was carried out at 50 ° C. by a moisture resistance tester according to JIS K5600-7-2. After 2 weeks, the test piece of each example was pulled up, the swelling state of the coating film was confirmed, and the water resistance of the coating film was evaluated according to the following evaluation criteria according to JIS K5600-8-2 (see swelling grade). The results are shown in Table 1.
(Evaluation criteria)
3: Ri (degree OF rusting) 0
2: Ri1 or 2
1: Ri3 or higher
表１に示した塗料安定性の評価から、実施例１〜１５と、比較例１〜４とを比較することで、上記キレート化剤（ｃ）の合計含有量がエポキシ樹脂（ａ）の固形分に対し、０．１〜２０質量％であることにより、上記防錆塗料組成物は溶剤に対しての安定性が優れることが確認された。また、表１に示した防錆性の評価から、上記キレート化剤（ｃ）の合計含有量がエポキシ樹脂（ａ）の固形分に対し、０．１〜２０質量％であることにより、上記防錆塗料組成物は、防錆性が高い皮膜（防錆皮膜）を形成できることが確認された。 From the evaluation of the coating stability shown in Table 1, by comparing Examples 1 to 15 and Comparative Examples 1 to 4, the total content of the chelating agent (c) is the solid of the epoxy resin (a). It was confirmed that the rust-preventive coating composition was excellent in stability with respect to a solvent when the content was 0.1 to 20% by mass based on the amount. Further, from the evaluation of the rust preventive property shown in Table 1, the total content of the chelating agent (c) was 0.1 to 20% by mass with respect to the solid content of the epoxy resin (a). It was confirmed that the rust-preventive coating composition can form a film having high rust-preventive properties (rust-preventive film).
また、表１に示した錆の安定化の評価結果及び塗膜の耐水性の評価結果から、実施例１、３〜６、８、１０〜１３、１５と、実施例２、７、９、１４とを比較することで、上記キレート化剤（ｃ）の合計含有量がエポキシ樹脂（ａ）の固形分に対し、１〜１５質量％であることにより、上記防錆塗料組成物は、十分に金属の表面の錆を安定化することができ、耐水性の良好な防錆皮膜を形成できることが確認された。 Further, from the evaluation results of rust stabilization and the evaluation results of water resistance of the coating film shown in Table 1, Examples 1, 3 to 6, 8, 10 to 13, 15 and Examples 2, 7, 9, were found. By comparing with 14, the total content of the chelating agent (c) is 1 to 15% by mass with respect to the solid content of the epoxy resin (a), so that the rust preventive coating composition is sufficient. It was confirmed that the rust on the surface of the metal can be stabilized and a rust preventive film having good water resistance can be formed.
Claims (3)
エポキシ樹脂（ａ）と、ポリアミン（ｂ）と、キレート化剤（ｃ）と、溶剤とを含み、
前記キレート化剤（ｃ）は、アミノカルボン酸系キレート剤の金属塩、ホスホン酸系キレート剤の金属塩、アミノカルボン酸系キレート剤及びホスホン酸系キレート剤からなる群より選ばれる少なくとも一種であり、
前記溶剤は、強溶剤または弱溶剤であり、
前記強溶剤は、キシレン、プロピレングリコールモノメチルエーテル及びイソプロピルアルコールからなる群より選ばれる少なくとも一種であり、
前記弱溶剤は、脂肪族炭化水素系溶剤であり、
前記キレート化剤（ｃ）の合計含有量は、前記エポキシ樹脂（ａ）の固形分に対し、０．１〜２０質量％である防錆塗料組成物。 A rust preventive coating composition used for metal surfaces.
It contains an epoxy resin (a), a polyamine (b), a chelating agent (c), and a solvent.
The chelating agent (c) is at least one selected from the group consisting of a metal salt of an aminocarboxylic acid-based chelating agent, a metal salt of a phosphonic acid-based chelating agent, an aminocarboxylic acid-based chelating agent, and a phosphonic acid-based chelating agent. ,
The solvent is a strong solvent or a weak solvent.
The strong solvent is at least one selected from the group consisting of xylene, propylene glycol monomethyl ether and isopropyl alcohol.
The weak solvent is an aliphatic hydrocarbon solvent, and is
The rust preventive coating composition in which the total content of the chelating agent (c) is 0.1 to 20% by mass with respect to the solid content of the epoxy resin (a).
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