JPH04154999A - Electrodeposition coating method - Google Patents
Electrodeposition coating methodInfo
- Publication number
- JPH04154999A JPH04154999A JP27864990A JP27864990A JPH04154999A JP H04154999 A JPH04154999 A JP H04154999A JP 27864990 A JP27864990 A JP 27864990A JP 27864990 A JP27864990 A JP 27864990A JP H04154999 A JPH04154999 A JP H04154999A
- Authority
- JP
- Japan
- Prior art keywords
- coating
- electrodeposition paint
- electrodeposition
- aluminum
- pigment
- 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
- 238000000576 coating method Methods 0.000 title claims abstract description 52
- 238000004070 electrodeposition Methods 0.000 title claims abstract description 52
- 239000011248 coating agent Substances 0.000 claims abstract description 38
- 239000003973 paint Substances 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 7
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 7
- 125000000129 anionic group Chemical group 0.000 claims abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 31
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 31
- 239000012860 organic pigment Substances 0.000 claims description 11
- 229910000838 Al alloy Inorganic materials 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 239000000049 pigment Substances 0.000 abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 12
- 229920000877 Melamine resin Polymers 0.000 abstract description 9
- 230000014759 maintenance of location Effects 0.000 abstract description 7
- 239000004640 Melamine resin Substances 0.000 abstract description 6
- 229910045601 alloy Inorganic materials 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 abstract description 3
- 239000010407 anodic oxide Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 21
- 238000012360 testing method Methods 0.000 description 14
- 239000002585 base Substances 0.000 description 9
- 239000001023 inorganic pigment Substances 0.000 description 7
- 239000007864 aqueous solution Substances 0.000 description 5
- 238000004040 coloring Methods 0.000 description 5
- 238000010422 painting Methods 0.000 description 5
- 239000003086 colorant Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- JHPBZFOKBAGZBL-UHFFFAOYSA-N (3-hydroxy-2,2,4-trimethylpentyl) 2-methylprop-2-enoate Chemical compound CC(C)C(O)C(C)(C)COC(=O)C(C)=C JHPBZFOKBAGZBL-UHFFFAOYSA-N 0.000 description 1
- QGKMIGUHVLGJBR-UHFFFAOYSA-M (4z)-1-(3-methylbutyl)-4-[[1-(3-methylbutyl)quinolin-1-ium-4-yl]methylidene]quinoline;iodide Chemical compound [I-].C12=CC=CC=C2N(CCC(C)C)C=CC1=CC1=CC=[N+](CCC(C)C)C2=CC=CC=C12 QGKMIGUHVLGJBR-UHFFFAOYSA-M 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-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
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- NRCMAYZCPIVABH-UHFFFAOYSA-N Quinacridone Chemical compound N1C2=CC=CC=C2C(=O)C2=C1C=C1C(=O)C3=CC=CC=C3NC1=C2 NRCMAYZCPIVABH-UHFFFAOYSA-N 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 125000005396 acrylic acid ester group Chemical group 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000002048 anodisation reaction Methods 0.000 description 1
- 238000007743 anodising Methods 0.000 description 1
- 239000000981 basic dye Substances 0.000 description 1
- 229910001593 boehmite Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 150000004696 coordination complex Chemical class 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 1
- WMYWOWFOOVUPFY-UHFFFAOYSA-L dihydroxy(dioxo)chromium;phosphoric acid Chemical compound OP(O)(O)=O.O[Cr](O)(=O)=O WMYWOWFOOVUPFY-UHFFFAOYSA-L 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000007610 electrostatic coating method Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- PXZQEOJJUGGUIB-UHFFFAOYSA-N isoindolin-1-one Chemical compound C1=CC=C2C(=O)NCC2=C1 PXZQEOJJUGGUIB-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 125000003367 polycyclic group Chemical group 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005406 washing Methods 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
- Application Of Or Painting With Fluid Materials (AREA)
- Paints Or Removers (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、表面に皮膜を形成したアルミニウムおよびア
ルミニウム合金を、有機顔料を含んだ電着塗料中で塗装
する電着塗装法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electrodeposition coating method in which aluminum and aluminum alloys with a film formed on the surface are coated in an electrodeposition paint containing an organic pigment. .
［従来の技術と発明が解決しようとする課題］従来より
、アルミニウムおよびその合金は、その特性を活かして
建築用品、厨房用品、装飾用品あるいは光学部品など様
々な方面で使用されている。そして、これらの用途に供
するために、予めアルミニウムおよびその合金に各種の
表面処理を施しているのが一般的である。表面処理の中
でも、最近、製品に対する多色化が要求され始めてきて
いることから、着色方法の技術開発が盛んに行なわれて
きている。[Prior Art and Problems to be Solved by the Invention] Conventionally, aluminum and its alloys have been used in various fields such as building products, kitchen products, decorative products, and optical components by taking advantage of their characteristics. In order to use these materials, aluminum and its alloys are generally subjected to various surface treatments in advance. Among surface treatments, recently there has been a demand for multi-colored products, and therefore, technical development of coloring methods has been actively carried out.
ところで、着色方法を大別すると、二次電解着色法と塗
装法とに分類される。By the way, coloring methods can be roughly divided into secondary electrolytic coloring methods and painting methods.
前記二次電解着色法によって得られる色は少なく、これ
では製品が持つデザインを強調するために適切な色を自
由に選びたいという要求には応えられない。そのため、
多色化の要求に応えるためにはどうしても塗装法で対応
するしかない。塗装法であれば、金属色を含めたより広
い色彩範囲から適切な色を自由に選択できるので都合が
よい。There are only a few colors that can be obtained by the secondary electrolytic coloring method, and this method cannot meet the demand for freely selecting an appropriate color to emphasize the design of a product. Therefore,
In order to meet the demand for multiple colors, there is no choice but to use a painting method. Painting is convenient because it allows you to freely select an appropriate color from a wider range of colors, including metallic colors.
塗装法は、さらに、電着塗装法とそれ以外の塗装方法（
例えば、静電塗装法、ロールコータ−塗装法等）に分類
される。The coating method further includes the electrodeposition coating method and other coating methods (
For example, it is classified into electrostatic coating method, roll coater coating method, etc.).
電着塗装性以外の塗装方法によって、製品を量産化する
場合には、塗料の配合量の微妙な違い、形成する塗膜の
厚みの違い、塗装時における環境の経時的な変化などの
要因が相乗的に働いて、得られる製品間に色相や彩度の
変化、所謂色彩バラツキが発生してしまう。そこで、量
産化の時は電着塗装法が採用されている。When mass-producing products using painting methods other than electro-deposition, factors such as subtle differences in the amount of paint mixed, differences in the thickness of the coating film formed, and changes in the environment during painting over time are important. Working synergistically, they cause changes in hue and saturation, or so-called color variations, between the resulting products. Therefore, the electrodeposition coating method is used for mass production.
現在、電着塗装法にあっては、隠蔽力が大きく、色褪せ
し難い無機顔料が用いられている。Currently, in the electrodeposition coating method, inorganic pigments that have a large hiding power and are resistant to fading are used.
しかし、このような無機顔料を、例えばポリマーを水溶
化してなる水溶性電着塗料に混合して電着塗装を行なう
際、電着塗料中において無機顔料の沈降が激しいために
、電着塗料を常時循環しておかなければならなかった。However, when such inorganic pigments are mixed with a water-soluble electrodeposition paint made by dissolving a polymer in water for electrodeposition coating, the inorganic pigment sediments rapidly in the electrodeposition paint, making it difficult to use the electrodeposition paint. It had to be kept in constant circulation.
また、電着塗料を循環していても無機顔料が二次凝集等
を起こしてしまい、塗装に有効な顔料濃度が得られない
。この状態で電着塗装を続けると、色の濃い製品や淡い
製品が得られることになる。さらに、無機物質が有機塗
膜中に存在する場合、無機顔料と有機塗膜との間の密着
性が乏しく、延いては塗膜の劣化を招いていた。Further, even if the electrodeposition paint is circulated, secondary aggregation of the inorganic pigment occurs, making it impossible to obtain an effective pigment concentration for coating. If electrodeposition coating is continued in this state, a product with a dark color or a product with a light color will be obtained. Furthermore, when an inorganic substance is present in an organic coating film, the adhesion between the inorganic pigment and the organic coating film is poor, leading to deterioration of the coating film.
そこで、上記の問題を解決しようと、前記無機顔料にか
えて有機顔料を電着塗料中に混合して電着塗装する試み
がなされた。しかし、ただ単に有機顔料を電着塗料中に
混合させただけでは、上記した分散性などの問題は解決
されず、現在のところ電着塗料用の有機顔料は見出され
ていなのが実情である。Therefore, in an attempt to solve the above-mentioned problems, attempts have been made to mix organic pigments into electrodeposition paints instead of the inorganic pigments and perform electrodeposition coating. However, simply mixing organic pigments into electrodeposition paints does not solve the above-mentioned problems such as dispersibility, and the reality is that no organic pigments for electrodeposition paints have been found at present. .
発明者らは、有機顔料の研究をさらに進め、ついに、電
着塗装に使用し得る有機顔料を見出し本発明に至った。The inventors further advanced their research on organic pigments, and finally discovered an organic pigment that can be used for electrodeposition coating, leading to the present invention.
［課題を解決するための手段および作用］本発明は、ア
ルミニウムおよびアルミニウム合金で構成されるアルミ
ニウム基材の表面に皮膜を形成した後、このアルミニウ
ム基材をアニオン系電着塗料中で塗装する電着塗装法に
おいて、粒子表面にアクリル樹脂をコーティングしてな
る有機顔料（以下、「コーティング顔料」という）を、
アニオン系電着塗料中に分散させたことを特徴とする電
着塗装法である。[Means and effects for solving the problem] The present invention is an electroplating method in which a film is formed on the surface of an aluminum base material made of aluminum and an aluminum alloy, and then the aluminum base material is coated in an anionic electrodeposition paint. In the coating method, an organic pigment whose particle surface is coated with acrylic resin (hereinafter referred to as "coated pigment") is
This is an electrodeposition coating method characterized by dispersion in anionic electrodeposition paint.
アルミニウム基材の表面に皮膜を形成する方法としては
、例えば、陽極酸化処理あるいは酸性またはアルカリ性
の水溶液で化学的に表面に皮膜を形成させる化成処理な
どによる方法が挙げられる。化成処理の具体例としては
、アルカリクロメート法、クロム酸塩法、リン酸クロム
酸塩法、リン酸亜鉛法あるいはベーマイト法などが挙げ
られる。Examples of methods for forming a film on the surface of the aluminum base material include methods such as anodizing treatment or chemical conversion treatment in which a film is chemically formed on the surface with an acidic or alkaline aqueous solution. Specific examples of the chemical conversion treatment include an alkali chromate method, a chromate method, a phosphate chromate method, a zinc phosphate method, and a boehmite method.
本発明の電着塗装に使用されるアニオン系電着塗料樹脂
としては、例えば、アクリル−メラミン樹脂、フッ素−
メラミン樹脂などが挙げられる。これら電着塗料樹脂は
、電着塗料中に、５〜２０重量％含まれていることが好
ましく、゛ ８〜１０重量％含まれていることがさ
らに好ましい。Examples of the anionic electrodeposition paint resin used in the electrodeposition coating of the present invention include acrylic-melamine resin, fluorine-based
Examples include melamine resin. These electrodeposition paint resins are preferably contained in the electrodeposition paint in an amount of 5 to 20% by weight, more preferably 8 to 10% by weight.
有機顔料としては、例えば、アゾ顔料、多環＝ ５−
式顔料、金属錯体顔料、酸性および塩基性染料レーキ、
あるいはこれらの混合物などが挙げられ、粒子径１０μ
ｍ以下のものが好ましい。Examples of organic pigments include azo pigments, polycyclic 5-type pigments, metal complex pigments, acidic and basic dye lakes,
Alternatively, a mixture of these can be mentioned, and the particle size is 10μ.
m or less is preferable.
アクリル樹脂としては、特に限定はなく、アクリル酸、
アクリル酸エステル、アクリルアミド、アクリロニトリ
ル、メタクリル酸、メタクリル酸エステルなどの重合体
および共重合体などが挙げられる。There are no particular limitations on the acrylic resin, including acrylic acid,
Examples include polymers and copolymers of acrylic acid ester, acrylamide, acrylonitrile, methacrylic acid, and methacrylic ester.
有機顔料の粒子表面にアクリル樹脂をコーティングする
方法としては、例えば、スプレーコーティングによる方
法が挙げられるが、これに限定されるものではない。Examples of methods for coating the surfaces of organic pigment particles with acrylic resin include, but are not limited to, spray coating.
コーティング顔料の具体例としては、キナクリドンにコ
ーティングしたフジＳＰピンク９５２７、シアニンにコ
ーティングしたフジＳＰブルー６１６５あるいはイソイ
ンドリノンにコーティングしたフジＳＰイエロー４１１
５（いずれも富士色素■製）等が挙げられる。Specific examples of coating pigments include Fuji SP Pink 9527 coated on quinacridone, Fuji SP Blue 6165 coated on cyanine, or Fuji SP Yellow 411 coated on isoindolinone.
5 (all manufactured by Fuji Shiroki ■), etc.
有機顔料の使用割合は、特に限定はないが、通常、電着
塗料１１に対して０．５〜３０ｇであるのが好ましい。The proportion of the organic pigment to be used is not particularly limited, but it is usually preferably 0.5 to 30 g based on the electrodeposition paint 11.
次に、アルミニウムおよびアルミニウム合金で構成され
るアルミニウム基材を着色する方法の一例を説明する。Next, an example of a method for coloring an aluminum base material made of aluminum and an aluminum alloy will be described.
アクリル樹脂の重合体にメラミン樹脂を混合させてなる
アクリル−メラミン樹脂を、アンモニア、ジエチルアミ
ン、トリエチルアミン等のアミン類を用いて親水化させ
た。このようにして得た水溶性アクリル−メラミン樹脂
に水を加えて濃度を調節し、水溶性電着塗料を得た。An acrylic-melamine resin made by mixing a melamine resin with an acrylic resin polymer was made hydrophilic using amines such as ammonia, diethylamine, and triethylamine. Water was added to the thus obtained water-soluble acrylic-melamine resin to adjust the concentration to obtain a water-soluble electrodeposition paint.
次いで、コーティング顔料を水溶性電着塗料に分散させ
た。この際、コーティング顔料は水溶性電着塗料中にお
いて沈降せず均一に分散した。これにより、電着塗料を
循環する必要はなかった。その後、この電着塗料中に、
表面に皮膜を形成させたアルミニウム基材を陽極として
浸漬し、直流電流を流して電着塗装を行なった。The coating pigment was then dispersed in the water-soluble electrodeposition paint. At this time, the coating pigment was uniformly dispersed in the water-soluble electrodeposition paint without settling. Thereby, there was no need to circulate the electrodeposition paint. Then, in this electrodeposition paint,
An aluminum base material with a film formed on its surface was immersed as an anode, and a direct current was applied to perform electrodeposition coating.
陰極としては、例えば、ステンレス板、アルミニウム板
などが使用される。また、この際の直流電流の電゛圧値
は、通常は１２０〜１５０■であり、通電時間としては
、特に限定はないが通常２分〜５分である。As the cathode, for example, a stainless steel plate, an aluminum plate, etc. are used. Further, the voltage value of the direct current at this time is usually 120 to 150 cm, and the current application time is usually 2 minutes to 5 minutes, although there is no particular limitation.
通電を行なった後、アルミニウム基材を取り出して水洗
し焼付は乾燥を行なった。この際の乾燥温度および時間
は特に限定されるものではないが、通常１５０〜２００
℃、２０〜４５分である。After energizing, the aluminum base material was taken out, washed with water, and baked and dried. The drying temperature and time at this time are not particularly limited, but usually 150 to 200
°C for 20 to 45 minutes.
上記の方法により形成する電着塗膜は、電着塗料中に無
機顔料を使用した従来法に比べ、より優れた鮮明度、保
色性および透明度を有しており、しかも、耐候性および
保色性に優れたものであった。また、特有の金属色を有
するアルミニウム基材の上に、上記した塗膜が形成する
ため、メタリック調の色調を生かすことができた。The electrodeposition coating film formed by the above method has better definition, color retention, and transparency than the conventional method that uses inorganic pigments in the electrodeposition paint, and also has better weather resistance and retention. It had excellent color properties. Furthermore, since the above-mentioned coating film was formed on an aluminum base material having a unique metallic color, it was possible to take advantage of the metallic color tone.
さらに、アルミニウム基材が複雑な形状のものであって
も、本発明の電着塗装によれば、このアルミニウム基材
の表面に耐候性および保色性に優れ色彩バラツキがなく
均一で美麗な色調の塗膜を形成することができる。した
がって、本発明の電着塗料法により得られる製品を装飾
品などに好適に使用することができる。Furthermore, even if the aluminum base material has a complicated shape, the electrodeposition coating of the present invention provides the surface of the aluminum base material with excellent weather resistance and color retention, and a uniform and beautiful color tone with no color variation. It is possible to form a coating film of Therefore, products obtained by the electrodeposition coating method of the present invention can be suitably used for decorative items and the like.
［実施例］ 次に、実施例により本発明をさらに詳細に説明する。[Example] Next, the present invention will be explained in more detail with reference to Examples.
実施例ｌ
Ａ３０５２Ｐ−Ｈ３２のアルミニウム板（７０ｍｍＸ
１５０ｍｍＸ １． ５ｍｍ）を表面から油分および酸
化皮膜を取り除くために、１０％硝酸水溶液に室温で１
０分間浸漬した後水洗した。次に５０℃に加温した５％
苛性ソーダ水溶液に３分間浸漬した後に水洗し、１０％
硝酸水溶液に室温で５分間浸漬中和した後に水洗した。Example l A3052P-H32 aluminum plate (70mm
150mmX 1. 5mm) in 10% nitric acid aqueous solution at room temperature to remove oil and oxide film from the surface.
After being immersed for 0 minutes, it was washed with water. Next, 5% heated to 50℃
After soaking in caustic soda aqueous solution for 3 minutes and washing with water, 10%
After being neutralized by immersion in a nitric acid aqueous solution at room temperature for 5 minutes, it was washed with water.
以上の前処理工程によりアルミニウム板の表面を洗浄し
た後、液温２０℃の１５％硫酸水溶液に浸漬し、陰極に
カーボン板を使用して、電流密度１、ＯＡ／ｄｍ２を有
する直流電流で３０分間陽極酸化をおこなった。その後
水洗し、膜厚９μｍの陽極酸化皮膜がアルミニウム板の
表面に形成した。After cleaning the surface of the aluminum plate through the above pretreatment process, it was immersed in a 15% sulfuric acid aqueous solution at a temperature of 20°C, and using a carbon plate as a cathode, a DC current with a current density of 1 and OA/dm2 was applied for 30 minutes. Anodic oxidation was performed for minutes. Thereafter, the aluminum plate was washed with water, and an anodic oxide film with a thickness of 9 μm was formed on the surface of the aluminum plate.
＝ ９ ＝
このようにして得た陽極酸化皮膜を有するアルミニウム
板を、１１中にフジＳＰピンク９５２７（冨士色素婚製
のコーティング顔料）を５ｇ含有する８％水溶性アクリ
ル−メラミン電着塗料中に浸漬し、陰極にステンレス板
を用いて、直流電圧１５０■で３分間通電した。なお、
前記コーティング顔料は、電着塗料中において沈降せず
均一に分散していた。その後、アルミニウム板を水洗し
て、１８０℃の乾燥炉内で３０分間焼き付は乾燥を行な
った。このようにして得た塗膜は９．６μｍの膜厚を有
し、鮮明なピンク色を呈していた。また、耐候性の優れ
た透明度の有る電着塗膜が得られた。 なお、耐候性に
関しては、本実施例で塗膜を形成させたアルミニウム板
について次のような試験を行ない、その結果により評価
した。= 9 = The aluminum plate having the anodized film thus obtained was placed in an 8% water-soluble acrylic-melamine electrodeposition paint containing 5 g of Fuji SP Pink 9527 (coating pigment manufactured by Fuji Shikikon Co., Ltd.) in 11. The sample was immersed in water and energized for 3 minutes at a DC voltage of 150 cm using a stainless steel plate as a cathode. In addition,
The coating pigment did not settle and was uniformly dispersed in the electrodeposition paint. Thereafter, the aluminum plate was washed with water and baked and dried in a drying oven at 180°C for 30 minutes. The coating film thus obtained had a film thickness of 9.6 μm and exhibited a clear pink color. Further, an electrodeposition coating film with excellent weather resistance and transparency was obtained. Regarding weather resistance, the following tests were conducted on the aluminum plate on which the coating film was formed in this example, and evaluation was made based on the results.
促進耐候性試験
サンシャインカーボンアーク燈式耐候性試験機で２５０
時間試験を行なった。Accelerated weather resistance test 250 with Sunshine carbon arc light weather resistance tester
I did a time test.
■光沢保持率（ＪＩＳ Ｚ ８７４１の光沢度測定
方法による）
試験前の光沢が試験後にどれだけ保持されているか調べ
た。光沢は光沢針により測定し、光沢保持率を、
試験後の光沢、□。０
試験前の光沢
として算出した。本実施例における試験結果は、９０％
であった。■Gloss retention rate (according to the gloss measurement method of JIS Z 8741) It was investigated how much the gloss before the test was retained after the test. Gloss is measured with a gloss needle, and the gloss retention rate is the gloss after the test, □. 0 Calculated as the gloss before the test. The test results in this example are 90%
Met.
なお、ＪＩＳ−Ｈ８６０２における規格値は、「７５％
以上」とある。The standard value in JIS-H8602 is “75%
That's all.''
■外観（変色）の観察
試験後の塗膜において、色が変化しているかどうかを目
視により判定した。(2) Observation of appearance (discoloration) After the test, whether or not the color of the coating film had changed was visually determined.
その結果、何ら変化はなつかた。As a result, no changes were made.
腐食促進試験
ＪＩＳ Ｈ８６８１のキャス試験に従って、腐食試験
を行なった。Corrosion acceleration test A corrosion test was conducted in accordance with the Cath test of JIS H8681.
その結果、Ｊ Ｉ ５−Ｈ３６０２に規定されている数
値よりも優位な数値が得られた。As a result, numerical values superior to those specified in J I 5-H3602 were obtained.
１１ 一
実施例２
実施例１と同じ方法で得た陽極酸化皮膜を有するアルミ
ニウム板を、１１中にフジＳＰブルー６１６５ （富士
色素■製のコーティング顔料）を１０ｇ含有する８％水
溶性アクリル−メラミン電着塗料中に浸漬し、陰極にス
テンレス板を用いて、直流電圧１２０ｖで５分間通電し
た。11 Example 2 An aluminum plate with an anodized film obtained by the same method as Example 1 was coated with 8% water-soluble acrylic-melamine containing 10 g of Fuji SP Blue 6165 (coating pigment manufactured by Fuji Shiroki ■). It was immersed in electrodeposition paint, and a stainless steel plate was used as a cathode, and electricity was applied for 5 minutes at a DC voltage of 120 V.
なお、前記コーティング顔料は、電着塗料中において沈
降せず均一に分散していた。その後、アルミニウム板を
水洗して、１８０℃の乾燥炉内で３０分間焼き付は乾燥
をおこなった。このようにして得た塗膜は鮮明な青色を
呈し、耐候性の優れた透明感の有るカラー電着塗膜が得
られた。The coating pigment was uniformly dispersed in the electrodeposition paint without settling. Thereafter, the aluminum plate was washed with water and baked and dried in a drying oven at 180°C for 30 minutes. The coating film thus obtained exhibited a clear blue color, and a transparent colored electrodeposited coating film with excellent weather resistance was obtained.
なお、本実施例における耐候性に関しては、実施例１と
同じ試験を行ない、その結果により評価した。本実施例
においては、実施例１と同等かより優位な結果が得られ
た。Regarding the weather resistance in this example, the same test as in Example 1 was conducted and the results were evaluated. In this example, results equivalent to or superior to Example 1 were obtained.
実施例３
Ａ１２００Ｐ−Ｈ２４のアルミニウム板（７０＋ｎｍＸ
１５０ｍｍＸ １． ５ｍｍ）を実施例１と同様の方
法で前処理および陽極酸化処理を行なった。Example 3 A1200P-H24 aluminum plate (70+nmX
150mmX 1. 5 mm) was subjected to pretreatment and anodization treatment in the same manner as in Example 1.
このようにして得られた陽極酸化皮膜を有するアルミニ
ウム板を、１１中にフジＳＰイエロー４１１５ （富士
色素■製のコーティング顔料）を１０ｇ含有する８％水
溶性アクリル−メラミン電着塗料中に浸漬し、陰極にス
テンレス板を用いて、直流電圧１５０ｖで３分間通電し
た。The aluminum plate with the anodized film thus obtained was immersed in an 8% water-soluble acrylic-melamine electrodeposition paint containing 10 g of Fuji SP Yellow 4115 (coating pigment manufactured by Fuji Shiroki ■) in 11. A stainless steel plate was used as the cathode, and a DC voltage of 150 V was applied for 3 minutes.
なお、前記コーティング顔料は、電着塗料中において沈
降せず均一に分散していた。その後、アルミニウム板を
水洗して、１８０℃の乾燥炉内で３０分間焼き付は乾燥
を行なった。このようにして得た塗膜は鮮明な黄色を呈
し、耐候性に優れた透明感を有するカラー電着塗膜が得
られた。The coating pigment was uniformly dispersed in the electrodeposition paint without settling. Thereafter, the aluminum plate was washed with water and baked and dried in a drying oven at 180°C for 30 minutes. The coating film thus obtained exhibited a clear yellow color, and a color electrodeposited coating film with excellent weather resistance and transparency was obtained.
なお、本実施例における耐候性に関しては、実施例１と
同じ試験を行ない、その結果により評価した。本実施例
においては、実施例１と同等かより優位な結果が得られ
た。Regarding the weather resistance in this example, the same test as in Example 1 was conducted and the results were evaluated. In this example, results equivalent to or superior to Example 1 were obtained.
［発明の効果］
本発明の電着塗料法によれば、用いる電着塗料を常に循
環しておくような必要がなく、アルミニウムおよびアル
ミニウム合金の上に耐候性に優れた塗膜を形成すること
ができる。[Effects of the Invention] According to the electrodeposition coating method of the present invention, there is no need to constantly circulate the electrodeposition coating used, and a coating film with excellent weather resistance can be formed on aluminum and aluminum alloys. I can do it.
特許出願人 株式会社日本電気化学工業所−１４＝Patent applicant: Nihon Denki Kagaku Kogyo Co., Ltd.-14=
Claims (1)
アルミニウム基材の表面に皮膜を形成した後、このアル
ミニウム基材をアニオン系電着塗料中で塗装する電着塗
装法において、 粒子表面にアクリル樹脂をコーティングしてなる有機顔
料を、アニオン系電着塗料中に分散させたことを特徴と
する電着塗装法。[Claims] 1. In an electrodeposition coating method in which a film is formed on the surface of an aluminum base material composed of aluminum and an aluminum alloy, and then this aluminum base material is coated in an anionic electrodeposition paint, the particle surface An electrodeposition coating method characterized by dispersing an organic pigment obtained by coating an acrylic resin on an anionic electrodeposition paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2278649A JPH0676680B2 (en) | 1990-10-16 | 1990-10-16 | Electrodeposition coating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2278649A JPH0676680B2 (en) | 1990-10-16 | 1990-10-16 | Electrodeposition coating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04154999A true JPH04154999A (en) | 1992-05-27 |
| JPH0676680B2 JPH0676680B2 (en) | 1994-09-28 |
Family
ID=17600223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2278649A Expired - Fee Related JPH0676680B2 (en) | 1990-10-16 | 1990-10-16 | Electrodeposition coating method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0676680B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093571C (en) * | 1998-12-01 | 2002-10-30 | 陈渭贤 | Process for preparing colour Al-alloy products by colour-complementary electric deposition |
| JP2007291525A (en) * | 2003-03-25 | 2007-11-08 | Nippon Paint Co Ltd | Method of managing electrodeposition bath in cationic electrodeposition coating and electrodeposition coating system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6436796A (en) * | 1987-08-01 | 1989-02-07 | Ota Toshuki | Electrodeposition coating method |
-
1990
- 1990-10-16 JP JP2278649A patent/JPH0676680B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6436796A (en) * | 1987-08-01 | 1989-02-07 | Ota Toshuki | Electrodeposition coating method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093571C (en) * | 1998-12-01 | 2002-10-30 | 陈渭贤 | Process for preparing colour Al-alloy products by colour-complementary electric deposition |
| JP2007291525A (en) * | 2003-03-25 | 2007-11-08 | Nippon Paint Co Ltd | Method of managing electrodeposition bath in cationic electrodeposition coating and electrodeposition coating system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0676680B2 (en) | 1994-09-28 |
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