JPH04290582A - Surface treated steel sheet excellent in coating property - Google Patents
Surface treated steel sheet excellent in coating propertyInfo
- Publication number
- JPH04290582A JPH04290582A JP7581291A JP7581291A JPH04290582A JP H04290582 A JPH04290582 A JP H04290582A JP 7581291 A JP7581291 A JP 7581291A JP 7581291 A JP7581291 A JP 7581291A JP H04290582 A JPH04290582 A JP H04290582A
- Authority
- JP
- Japan
- Prior art keywords
- film
- ester
- steel sheet
- methacrylic acid
- plated steel
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 45
- 239000010959 steel Substances 0.000 title claims abstract description 45
- 238000000576 coating method Methods 0.000 title abstract description 23
- 239000011248 coating agent Substances 0.000 title abstract description 22
- 150000002148 esters Chemical class 0.000 claims abstract description 25
- 229920005989 resin Polymers 0.000 claims abstract description 24
- 239000011347 resin Substances 0.000 claims abstract description 24
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000178 monomer Substances 0.000 claims abstract description 16
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 15
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000314 lubricant Substances 0.000 claims abstract description 12
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229920006026 co-polymeric resin Polymers 0.000 claims description 6
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 238000007334 copolymerization reaction Methods 0.000 claims 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 229920003145 methacrylic acid copolymer Polymers 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000000740 bleeding effect Effects 0.000 abstract 1
- 229920001577 copolymer Polymers 0.000 description 13
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 7
- 125000005395 methacrylic acid group Chemical group 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 5
- 239000003973 paint Substances 0.000 description 5
- 239000004925 Acrylic resin Substances 0.000 description 4
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- 229920002126 Acrylic acid copolymer Polymers 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 3
- 229920000298 Cellophane Polymers 0.000 description 3
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 3
- -1 zinc-aluminum-magnesium Chemical compound 0.000 description 3
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 2
- MUZDXNQOSGWMJJ-UHFFFAOYSA-N 2-methylprop-2-enoic acid;prop-2-enoic acid Chemical compound OC(=O)C=C.CC(=C)C(O)=O MUZDXNQOSGWMJJ-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 229910000599 Cr alloy Inorganic materials 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- 229910000914 Mn alloy Inorganic materials 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 2
- 229920002845 Poly(methacrylic acid) Polymers 0.000 description 2
- 229920002125 Sokalan® Polymers 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 2
- 239000000788 chromium alloy Substances 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 2
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000004584 polyacrylic acid Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N 1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylic acid Chemical compound C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-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
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000005639 Lauric acid Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical class [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 229910000611 Zinc aluminium Inorganic materials 0.000 description 1
- KPCKTYTYYAWIMI-UHFFFAOYSA-N [Cr].[Co].[Zn] Chemical compound [Cr].[Co].[Zn] KPCKTYTYYAWIMI-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 description 1
- QQHSIRTYSFLSRM-UHFFFAOYSA-N alumanylidynechromium Chemical compound [Al].[Cr] QQHSIRTYSFLSRM-UHFFFAOYSA-N 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- QHIWVLPBUQWDMQ-UHFFFAOYSA-N butyl prop-2-enoate;methyl 2-methylprop-2-enoate;prop-2-enoic acid Chemical compound OC(=O)C=C.COC(=O)C(C)=C.CCCCOC(=O)C=C QHIWVLPBUQWDMQ-UHFFFAOYSA-N 0.000 description 1
- 238000006757 chemical reactions by type Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- DQIPXGFHRRCVHY-UHFFFAOYSA-N chromium zinc Chemical compound [Cr].[Zn] DQIPXGFHRRCVHY-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- QNDQILQPPKQROV-UHFFFAOYSA-N dizinc Chemical compound [Zn]=[Zn] QNDQILQPPKQROV-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- KFZAUHNPPZCSCR-UHFFFAOYSA-N iron zinc Chemical compound [Fe].[Zn] KFZAUHNPPZCSCR-UHFFFAOYSA-N 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- WJZHMLNIAZSFDO-UHFFFAOYSA-N manganese zinc Chemical compound [Mn].[Zn] WJZHMLNIAZSFDO-UHFFFAOYSA-N 0.000 description 1
- 229940117841 methacrylic acid copolymer Drugs 0.000 description 1
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 1
- SNVLJLYUUXKWOJ-UHFFFAOYSA-N methylidenecarbene Chemical compound C=[C] SNVLJLYUUXKWOJ-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 150000005846 sugar alcohols Chemical class 0.000 description 1
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical compound S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【００１】001
【産業上の利用分野】本発明は、塗膜密着性に優れた表
面処理鋼板に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface-treated steel sheet with excellent coating film adhesion.
【００２】002]
【従来技術】従来より亜鉛（亜鉛系合金）めっき鋼板、
アルミニウム（アルミニウム系合金）めっき鋼板などの
めっき鋼板は自動車、家電、建築などの分野に広く使用
されているが、近年、このような表面処理鋼板には、耐
食性のほか塗装前処理の省略化、加工性や耐指紋性の向
上などが要求されている。このため、後処理として、単
にクロメート処理を施しただけでは不充分で、クロメー
ト皮膜の上に膜厚５μｍ以下の薄い有機樹脂皮膜を形成
して、塗装前処理を施さなくともその有機樹脂皮膜の上
に上塗り塗料を直接塗装できるようにしたものが種々開
発されている。また、このうち、一部のものは、樹脂皮
膜中に潤滑剤を添加して、皮膜に潤滑性を付与し、加工
しても皮膜に疵が生じないようにしている。[Prior art] Conventionally, zinc (zinc-based alloy) plated steel sheets,
Coated steel sheets such as aluminum (aluminum alloy) plated steel sheets are widely used in fields such as automobiles, home appliances, and architecture, but in recent years, surface-treated steel sheets have been developed to have corrosion resistance, as well as to eliminate pre-painting treatment. Improvements in processability and fingerprint resistance are required. For this reason, simply applying chromate treatment as a post-treatment is not sufficient; a thin organic resin film with a thickness of 5 μm or less is formed on the chromate film, and the organic resin film can be removed without pre-painting treatment. Various products have been developed that allow a top coat to be applied directly onto the surface. In addition, some of these resin coatings have a lubricant added to the resin coating to impart lubricity to the coating and prevent scratches from occurring in the coating even when processed.
【００３】この種の表面処理鋼板では皮膜樹脂に水可溶
性もしくは水分散性のものを使用しているものが多く、
とくに、塗膜密着性、耐食性に優れたアクリル系樹脂が
使用されている。このアクリル系樹脂として従来使用さ
れているものは、ポリアクリル酸およびその共重合体、
ポリアクリル酸エステルおよびその共重合体のようなア
クリル酸系樹脂、ポリメタクリル酸およびその共重合体
、ポリメタクリル酸エステルおよびその共重合体のよう
なメタクリル酸系樹脂などで、共重合体の場合はアクリ
ルもしくはメタクリル以外のモノマ−を共重させていた
。[003] Many of these types of surface-treated steel sheets use water-soluble or water-dispersible coating resins.
In particular, acrylic resins are used because they have excellent coating film adhesion and corrosion resistance. Conventionally used acrylic resins include polyacrylic acid and its copolymers,
Acrylic acid resins such as polyacrylic acid esters and their copolymers, methacrylic acid resins such as polymethacrylic acid and their copolymers, polymethacrylic acid esters and their copolymers, and in the case of copolymers. had copolymerized monomers other than acrylic or methacrylic.
【００４】004
【発明が解決しようとする課題】しかしながら、このよ
うなアクリル系樹脂のうち、アクリル酸系樹脂皮膜は、
皮膜に潤滑剤を添加した場合、潤滑剤が皮膜表面より浸
出し、皮膜の上に上塗り塗料を塗装すると、上塗り塗膜
の密着性が低下してしまうという問題もあった。また、
メタクリル酸系樹脂皮膜の場合は、上塗り塗膜の密着性
、特に、耐水密着性が劣るという問題があった。本発明
は、これらの欠点を解消した表面処理鋼板を提供するも
のである。[Problems to be Solved by the Invention] However, among such acrylic resins, acrylic acid resin films are
When a lubricant is added to the film, there is also the problem that the lubricant leaches from the surface of the film, and when a top coat is applied on top of the film, the adhesion of the top coat decreases. Also,
In the case of methacrylic acid resin films, there was a problem in that the topcoat film had poor adhesion, particularly poor water resistant adhesion. The present invention provides a surface-treated steel sheet that eliminates these drawbacks.
【００５】005]
【課題を解決するための手段】本発明は、めっき鋼板の
表面にクロメート皮膜を形成し、そのクロメート皮膜の
上に（Ａ）一般式ＣＨ２＝Ｃ（ＣＨ３）−ＣＯＯＲ（Ｒ
は水素か、炭素数が１〜８のアルキル基）で示されるメ
タクリル酸もしくはそのエステルとアクリル酸もしくは
そのエステルとの共重合体樹脂、または、（Ｂ）前記構
造のメタクリル酸もしくはそのエステル、アクリル酸も
しくはそのエステルおよびこれらと共重合可能なモノマ
−との共重合体樹脂（但し、共重合可能なモノマ−のモ
ル比率は５０％未満）で、メタクリル酸およびそのエス
テル成分がモル比率で２０％以下であるものの皮膜、ま
たは、この皮膜に樹脂１００重量部当たり１〜２５重量
部添加したものを形成した。[Means for Solving the Problems] The present invention forms a chromate film on the surface of a plated steel sheet, and applies the general formula (A) CH2=C(CH3)-COOR(R
is hydrogen or an alkyl group having 1 to 8 carbon atoms), a copolymer resin of methacrylic acid or its ester and acrylic acid or its ester, or (B) methacrylic acid or its ester with the above structure, acrylic A copolymer resin of an acid or its ester and a monomer copolymerizable with these (however, the molar ratio of the copolymerizable monomer is less than 50%), where the molar ratio of methacrylic acid and its ester component is 20%. A film of the following or a film containing 1 to 25 parts by weight per 100 parts by weight of resin was formed.
【００６】006]
【作用】メタクリル酸樹脂やメタクリル酸共重合体樹脂
は硬く、上塗り塗膜との密着性が劣るため、上塗り塗装
を施した場合の耐水密着性に劣る。一方、アクリル酸樹
脂やアクリル酸共重合体樹脂は、柔らかく、上塗り塗膜
との密着性が優れているため、耐水密着性に優れている
が、潤滑剤を添加した場合表面に浸出してくる。そこで
、この両者を共重合させるか、それらと共重合可能なモ
ノマ−を共重合させれば、上塗り塗装した場合の耐水密
着性を改善でき、皮膜表面からの潤滑剤浸出を抑制でき
る。しかし、皮膜はメタクリル酸およびそのエステル成
分がモル比率で２０％を越えると、上塗り塗膜との耐水
密着性が低下してしまう。[Action] Methacrylic acid resin and methacrylic acid copolymer resin are hard and have poor adhesion to top coats, resulting in poor water resistant adhesion when top coats are applied. On the other hand, acrylic acid resins and acrylic acid copolymer resins are soft and have excellent adhesion to the top coat, so they have excellent water-resistant adhesion, but when lubricants are added, they leach onto the surface. . Therefore, by copolymerizing these two or copolymerizing a monomer copolymerizable with them, it is possible to improve the water-resistant adhesion when topcoating and suppress lubricant leaching from the surface of the film. However, if the molar ratio of methacrylic acid and its ester component exceeds 20%, the film will have poor water-resistant adhesion to the top coat.
【００７】図１は、クロメート処理した電気亜鉛めっき
鋼板（板厚０．６ｍｍ、めっき付着量２０ｇ／ｍ２）に
メチルメタクリレ−トとエチルアクリレ−トの共重合体
のメチルメタクリレ−ト成分量を種々変更したものを塗
布して、乾燥した後、アクリル系溶剤型塗料［日本ペイ
ント（株）製ス−パ−ラックＦ４７］を塗装して、乾燥
し、その後沸水中に２時間浸漬して、上塗り塗膜の密着
性を調査した結果を示すものである。密着性試験は、ゴ
バン目６ｍｍ張り出し加工して、加工部にセロテ−プ貼
付け、剥離を施し、残存塗膜率（％）を算出する方法で
行った。図１から明らかなように、メチルメタクリレ−
トのモル比率が２０％を越えると、耐水密着性が急激に
低下してしまう。Figure 1 shows the amount of methyl methacrylate in a copolymer of methyl methacrylate and ethyl acrylate on a chromate-treated electrogalvanized steel sheet (thickness 0.6 mm, coating weight 20 g/m2). After applying various modifications of , and drying, acrylic solvent-based paint [Superlac F47 manufactured by Nippon Paint Co., Ltd.] was applied, dried, and then immersed in boiling water for 2 hours. , which shows the results of investigating the adhesion of the top coat film. The adhesion test was carried out by a method in which a 6 mm protrusion process was performed, cellotape was applied to the processed area, and then peeled off, and the remaining coating film rate (%) was calculated. As is clear from Figure 1, methyl methacrylate
If the molar ratio of t exceeds 20%, the water resistant adhesion will drop sharply.
【００８】本発明の皮膜に使用する樹脂としては、メタ
クリル酸−アクリル酸共重合体、メタクリル酸−アクリ
ル酸エステル共重合体、メタクリル酸エステル−アクリ
ル酸共重合体、メタクリル酸エステル−アクリル酸エス
テル共重合体、メタクリル酸−アクリル酸−第３モノマ
−共重合体、メタクリル酸−アクリル酸エステル−第３
モノマ−共重合体、メタクリル酸エステル−アクリル酸
−第３モノマ−共重合体、メタクリル酸エステル−アク
リル酸エステル−第３モノマ−共重合体である。[008] As the resin used for the film of the present invention, methacrylic acid-acrylic acid copolymer, methacrylic acid-acrylic ester copolymer, methacrylic ester-acrylic acid copolymer, methacrylic ester-acrylic ester copolymer, methacrylic acid-acrylic acid-third monomer copolymer, methacrylic acid-acrylic acid ester-third monomer
They are a monomer copolymer, a methacrylic ester-acrylic acid-third monomer copolymer, and a methacrylic ester-acrylic ester-third monomer copolymer.
【００９】ここで、メタクリル酸エステルとしては、メ
チルメタクリレ−ト、エチルメタクリレ−ト、ブチルメ
タクリレ−トなどが掲げられる。また、アクリル酸エス
テルとしては、メチルアクリレ−ト、エチルアクリレ−
ト、ブチルアクリレ−ト、２−エチルヘキシルアクリレ
−トなどが掲げられる。さらに、メタクリル酸およびそ
のエステル並びにアクリル酸およびそのエステルと共重
合可能なモノマ−としては、アクリロニトリル、アクリ
ルアミド、スチレン、ブタジエン、ビニルアセテ−トな
どが掲げられる。なお、皮膜厚は、５μｍ以下、好まし
くは０．１〜２．５μｍにする。[009] Examples of the methacrylic acid ester include methyl methacrylate, ethyl methacrylate, and butyl methacrylate. In addition, acrylic esters include methyl acrylate and ethyl acrylate.
Examples include ester, butyl acrylate, and 2-ethylhexyl acrylate. Further, monomers copolymerizable with methacrylic acid and its esters and acrylic acid and its esters include acrylonitrile, acrylamide, styrene, butadiene, vinyl acetate, and the like. Note that the film thickness is 5 μm or less, preferably 0.1 to 2.5 μm.
【０１０】本発明でのめっき鋼板は、クロメート処理に
より耐食性を向上させることのできるものであればよい
。例えば、亜鉛めっき鋼板、亜鉛−鉄合金めっき鋼板、
亜鉛−ニッケル合金めっき鋼板、亜鉛−マンガン合金め
っき鋼板、亜鉛−アルミニウム合金めっき鋼板、亜鉛−
マグネシウム合金めっき鋼板、亜鉛−クロム合金めっき
鋼板、亜鉛−アルミニウム−マグネシウム合金めっき鋼
板、亜鉛−コバルト−クロム合金めっき鋼板などの亜鉛
系めっき鋼板、アルミニウムめっき鋼板、アルミニウム
−シリコン合金めっき鋼板、アルミニウム−クロム合金
めっき鋼板、アルミニウム−マンガン合金めっき鋼板、
アルミニウム−ニッケル合金めっき鋼板などのアルミニ
ウム系めっき鋼板、銅めっき鋼板、銅合金めっき鋼板な
どである。[010] The plated steel sheet used in the present invention may be any plated steel sheet as long as its corrosion resistance can be improved by chromate treatment. For example, galvanized steel sheet, zinc-iron alloy plated steel sheet,
Zinc-nickel alloy plated steel sheet, zinc-manganese alloy plated steel sheet, zinc-aluminum alloy plated steel sheet, zinc-
Zinc-based plated steel sheets such as magnesium alloy plated steel sheets, zinc-chromium alloy plated steel sheets, zinc-aluminum-magnesium alloy plated steel sheets, zinc-cobalt-chromium alloy plated steel sheets, aluminum plated steel sheets, aluminum-silicon alloy plated steel sheets, aluminum-chromium Alloy plated steel plate, aluminum-manganese alloy plated steel plate,
These include aluminum-plated steel sheets such as aluminum-nickel alloy plated steel sheets, copper-plated steel sheets, and copper alloy-plated steel sheets.
【０１１】クロメート皮膜も従来のクロメート処理法で
形成したものでよい。すなわち、クロメート処理法には
、塗布型、反応型、電解型などがあるが、これらのいず
れの方法で形成したものでもよい。また、皮膜量は、従
来５〜２００ｍｇ／ｍ２にしているが、この範囲でよい
。The chromate film may also be formed by a conventional chromate treatment method. That is, chromate treatment methods include coating type, reaction type, electrolytic type, etc., and any of these methods may be used. Further, although the coating amount has conventionally been set to 5 to 200 mg/m2, it may be within this range.
【０１２】有機樹脂皮膜に潤滑剤を添加する場合の添加
剤も従来のものでよい。例えば、有機系のものとして、
従来、ポリエチレンワックス、天然パラフィンなど炭化
水素系のもの、ラウリル酸、ステアリン酸など脂肪酸系
のもの、脂肪酸の低級アルコ−ルエステルや脂肪酸の多
価アルコ−ルエステルなどのようなエステル系のものが
使用されているが、これらでよい。無機系のものとして
は、グラファイト、二硫化モリブデン、二硫化タングス
テンなどが使用されているが、これらでもよい。[012] When a lubricant is added to the organic resin film, conventional additives may be used. For example, as an organic type,
Conventionally, hydrocarbon-based products such as polyethylene wax and natural paraffin, fatty acid-based products such as lauric acid and stearic acid, and ester-based products such as lower alcohol esters of fatty acids and polyhydric alcohol esters of fatty acids have been used. However, these are fine. Graphite, molybdenum disulfide, tungsten disulfide, etc. are used as inorganic materials, but these may also be used.
【０１３】有機樹脂皮膜中への潤滑剤添加量は、樹脂１
００重量部当たり１重量部未満であると、添加効果があ
まりなく、２５重量部を越えると、皮膜処理液への分散
不良、ゲル化が生じ、皮膜の密着性も低下するため、従
来１〜２５重量部にしていたが、この範囲でよい。[013] The amount of lubricant added to the organic resin film is as follows:
If the amount is less than 1 part by weight per 00 parts by weight, the addition effect will not be so great, and if it exceeds 25 parts by weight, poor dispersion into the film treatment solution, gelation, and poor adhesion of the film will occur. Although the amount was set at 25 parts by weight, it may be within this range.
【０１４】014]
【実施例】塗布型クロメート処理を施した亜鉛−ニッケ
ル合金めっき鋼板（板厚０．７ｍｍ、めっき付着量２０
ｇ／ｍ２、めっき層のＮｉ含有率１１．８ｍａｓｓ％）
または反応型クロメート処理を施した溶融アルミニウム
めっき鋼板（板厚１．０ｍｍ、めっき付着量４３ｇ／ｍ
２、めっき層のＳｉ含有率９．１ｍａｓｓ％）に有機樹
脂を被覆して、塗膜密着性試験を行った。なお、めっき
鋼板へのクロメート処理は、次のようにして行った。[Example] Zinc-nickel alloy plated steel plate with coating type chromate treatment (thickness 0.7 mm, coating weight 20
g/m2, Ni content of plating layer 11.8 mass%)
Or hot-dip aluminum plated steel plate with reactive chromate treatment (thickness 1.0mm, coating weight 43g/m
2. The plating layer (Si content: 9.1 mass%) was coated with an organic resin, and a coating film adhesion test was conducted. Note that the chromate treatment on the plated steel sheet was performed as follows.
【０１５】（１）塗布型クロメート処理全Ｃｒ２５ｇ／
ｌ、Ｃｒ３＋／全Ｃｒの比０．４、シリカゾル７５ｇ／
ｌ、リン酸８ｇ／ｌ、ホウ酸２ｇ／ｌからなるクロメー
ト処理液をロ−ルコ−タ−でめっき鋼板に塗布して、全
Ｃｒ量が５０ｍｇ／ｍ２のクロメート皮膜を形成し、２
００℃で乾燥した。
（２）反応型クロメート処理
無水クロム酸８ｇ／ｌ、リン酸１５ｇ／ｌ、フッ酸１ｇ
／ｌからなるクロメート処理液にめっき鋼板を浸漬して
、引き上げ後絞りロ−ルで絞り、全Ｃｒ量が２０ｍｇ／
ｍ２のクロメート皮膜を形成した。(1) Coating type chromate treatment Total Cr25g/
l, Cr3+/total Cr ratio 0.4, silica sol 75g/
A chromate treatment solution consisting of 8 g/l of phosphoric acid and 2 g/l of boric acid was applied to a plated steel plate using a roll coater to form a chromate film with a total Cr content of 50 mg/m2.
It was dried at 00°C. (2) Reactive chromate treatment Chromic anhydride 8g/l, phosphoric acid 15g/l, hydrofluoric acid 1g
A plated steel plate was immersed in a chromate treatment solution consisting of Cr/l, pulled up and then squeezed with a squeezing roll until the total amount of Cr was 20mg/l.
A chromate film of m2 was formed.
【０１６】また、有機樹脂の被覆は、アクリル酸もしく
はそのエステルのモノマ−、メタクリル酸もしくはその
エステルのモノマ−および共重合可能なモノマ−のモル
比率を変えたそれらの共重合体樹脂を製造して、そのエ
マルジョンを調製し、これを乾燥塗膜厚が１．０〜１．
５μｍとなるようにクロメート処理めっき鋼板に塗布し
、１００℃で乾燥した。また、一部のエマルジョンには
、有機系または無機系潤滑剤を樹脂１００重量部当たり
１０〜１５重量部添加して塗布した。第１〜３表に表面
処理鋼板の構造を示す。[016] For coating with an organic resin, a copolymer resin of acrylic acid or its ester monomer, a methacrylic acid or its ester monomer, and a copolymerizable monomer with different molar ratios can be produced. Then, an emulsion was prepared, and the dry coating thickness was 1.0 to 1.
It was applied to a chromate-treated plated steel plate to a thickness of 5 μm and dried at 100°C. In addition, 10 to 15 parts by weight of an organic or inorganic lubricant was added to some of the emulsions per 100 parts by weight of the resin. Tables 1 to 3 show the structures of the surface-treated steel sheets.
【０１７】さらに、塗膜密着性は、有機樹脂被覆鋼板に
アクリル系溶剤型塗料［日本ペイント（株）製ス−パ−
ラックＦ４７］を乾燥塗膜厚が３０μｍになるように塗
布し、１６０℃で１０分間加熱乾燥し、冷却後そのまま
又は沸水中に２時間浸漬後塗膜密着性試験を行った。塗
膜密着性試験は、碁盤目セロハンテ−プ剥離、碁盤目６
ｍｍ張り出し加工後セロハンテ−プ剥離を施し、セロハ
ンテ−プ剥離後の塗膜残存率（％）で評価した。第４表
にこの結果を示す。Furthermore, the adhesion of the paint film was evaluated using an acrylic solvent-based paint [Super Nippon Paint Co., Ltd.] on the organic resin-coated steel plate.
Rack F47] was applied to a dry film thickness of 30 μm, dried by heating at 160° C. for 10 minutes, and after cooling, a film adhesion test was conducted as it was or after immersed in boiling water for 2 hours. Paint film adhesion test consists of cellophane tape peeling in a grid pattern and 6 in a grid pattern.
After the bulging process was performed, cellophane tape was peeled off, and the coating film remaining rate (%) after the cellophane tape was peeled off was evaluated. Table 4 shows the results.
【０１８】018]
【第１表】
ＭＡ：メチルアクリレ−ト、ＢＡ：ブチルアクリレ−ト
、ＥＡ：エチルアクリレ−ト、２ＥＨＡ：２−エチルヘ
キシルアクリレ−ト、Ａｃ：アクリル酸、[Table 1] MA: methyl acrylate, BA: butyl acrylate, EA: ethyl acrylate, 2EHA: 2-ethylhexyl acrylate, Ac: acrylic acid,
【０１９】019]
【第２表】
ＭＭＡ：メチルメタクリレ−ト、ＢＭＡ：ブチルメタク
リレ−ト、ＥＭＡ：エチルメタクリレ−ト、ＭＡｃ：メ
タクリル酸[Table 2] MMA: Methyl methacrylate, BMA: Butyl methacrylate, EMA: Ethyl methacrylate, MAc: Methacrylic acid
【０２０】020]
【第３表】[Table 3]
【０２１】021]
【第４表】[Table 4]
【０２２【発明の効果】以上のように、本発明の表面処
理鋼板は、上塗り塗装した場合の塗膜耐水密着性が向上
し、有機樹脂皮膜に潤滑剤を添加しても、上塗り塗膜と
の密着性が低下することがない。Effects of the Invention As described above, the surface-treated steel sheet of the present invention has improved water-resistant adhesion of the paint film when applied with a top coat, and even if a lubricant is added to the organic resin film, the surface treated steel sheet does not adhere to the top coat. There is no reduction in adhesion.
【図１】メチルメタクリレ−ト−エチルアクリレ−ト共
重合体皮膜中のメチルメタクリレ−ト量と上塗り塗膜の
密着性との関係を示すグラフである。FIG. 1 is a graph showing the relationship between the amount of methyl methacrylate in a methyl methacrylate-ethyl acrylate copolymer film and the adhesion of the top coat.
Claims (2)
形成し、そのクロメート皮膜の上に（Ａ）一般式ＣＨ２
＝Ｃ（ＣＨ３）−ＣＯＯＲ（Ｒは水素か、炭素数が１〜
８のアルキル基）で示されるメタクリル酸もしくはその
エステルとアクリル酸もしくはそのエステルとの共重合
体樹脂、または、（Ｂ）前記構造のメタクリル酸もしく
はそのエステル、アクリル酸もしくはそのエステルおよ
びこれらと共重合可能なモノマ−との共重合体樹脂（但
し、共重合可能なモノマ−のモル比率は５０％未満）で
、メタクリル酸およびそのエステル成分がモル比率で２
０％以下であるものの皮膜を形成したことを特徴とする
塗装性に優れた表面処理鋼板。Claim 1: A chromate film is formed on the surface of a plated steel sheet, and (A) general formula CH2 is formed on the chromate film.
=C(CH3)-COOR (R is hydrogen or the number of carbon atoms is 1 to
A copolymer resin of methacrylic acid or its ester and acrylic acid or its ester, or (B) methacrylic acid or its ester, acrylic acid or its ester, and copolymerization thereof with the above structure A copolymer resin with possible monomers (however, the molar ratio of copolymerizable monomers is less than 50%), with a molar ratio of methacrylic acid and its ester components
A surface-treated steel sheet with excellent paintability, characterized by forming a film of 0% or less.
を樹脂１００重量部当たり１〜２５重量部添加したこと
を特徴とする塗装性に優れた表面処理鋼板。2. A surface-treated steel sheet with excellent paintability, characterized in that a lubricant is added to the copolymer resin film according to claim 1 in an amount of 1 to 25 parts by weight per 100 parts by weight of the resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7581291A JP2868332B2 (en) | 1991-03-15 | 1991-03-15 | Surface-treated steel sheet with excellent paintability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7581291A JP2868332B2 (en) | 1991-03-15 | 1991-03-15 | Surface-treated steel sheet with excellent paintability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04290582A true JPH04290582A (en) | 1992-10-15 |
| JP2868332B2 JP2868332B2 (en) | 1999-03-10 |
Family
ID=13586969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7581291A Expired - Fee Related JP2868332B2 (en) | 1991-03-15 | 1991-03-15 | Surface-treated steel sheet with excellent paintability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2868332B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0783924A1 (en) | 1996-01-10 | 1997-07-16 | Nkk Corporation | Organic composite coated steel plate |
-
1991
- 1991-03-15 JP JP7581291A patent/JP2868332B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0783924A1 (en) | 1996-01-10 | 1997-07-16 | Nkk Corporation | Organic composite coated steel plate |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2868332B2 (en) | 1999-03-10 |
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