JPH03183798A - Electrodeposition coating method and electrodeposition coated material - Google Patents
Electrodeposition coating method and electrodeposition coated materialInfo
- Publication number
- JPH03183798A JPH03183798A JP32111289A JP32111289A JPH03183798A JP H03183798 A JPH03183798 A JP H03183798A JP 32111289 A JP32111289 A JP 32111289A JP 32111289 A JP32111289 A JP 32111289A JP H03183798 A JPH03183798 A JP H03183798A
- Authority
- JP
- Japan
- Prior art keywords
- film
- coating
- pigment
- electrodeposition
- paint
- 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 88
- 238000004070 electrodeposition Methods 0.000 title claims abstract description 41
- 239000000463 material Substances 0.000 title claims abstract description 24
- 239000011248 coating agent Substances 0.000 claims abstract description 70
- 239000003973 paint Substances 0.000 claims abstract description 58
- 239000000049 pigment Substances 0.000 claims abstract description 43
- 238000002834 transmittance Methods 0.000 claims abstract description 34
- 230000003647 oxidation Effects 0.000 claims abstract description 13
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 13
- 239000000956 alloy Substances 0.000 claims abstract description 11
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 45
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 45
- 239000002131 composite material Substances 0.000 claims description 37
- 238000004040 coloring Methods 0.000 claims description 19
- 238000007743 anodising Methods 0.000 claims description 5
- 238000011282 treatment Methods 0.000 abstract description 29
- 229910000906 Bronze Inorganic materials 0.000 abstract description 18
- 239000010974 bronze Substances 0.000 abstract description 18
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 abstract description 18
- 239000004925 Acrylic resin Substances 0.000 abstract description 8
- 229920000178 Acrylic resin Polymers 0.000 abstract description 8
- 229920001187 thermosetting polymer Polymers 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 208000012641 Pigmentation disease Diseases 0.000 abstract 3
- 230000019612 pigmentation Effects 0.000 abstract 3
- 230000001105 regulatory effect Effects 0.000 abstract 3
- VVOLVFOSOPJKED-UHFFFAOYSA-N copper phthalocyanine Chemical compound [Cu].N=1C2=NC(C3=CC=CC=C33)=NC3=NC(C3=CC=CC=C33)=NC3=NC(C3=CC=CC=C33)=NC3=NC=1C1=CC=CC=C12 VVOLVFOSOPJKED-UHFFFAOYSA-N 0.000 abstract 1
- 238000001579 optical reflectometry Methods 0.000 abstract 1
- 239000003086 colorant Substances 0.000 description 18
- 239000010407 anodic oxide Substances 0.000 description 12
- 230000003595 spectral effect Effects 0.000 description 12
- 238000005259 measurement Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 238000001125 extrusion Methods 0.000 description 9
- 239000002245 particle Substances 0.000 description 8
- 210000003298 dental enamel Anatomy 0.000 description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 238000003618 dip coating Methods 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 5
- 239000001055 blue pigment Substances 0.000 description 5
- 239000000975 dye Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 239000003513 alkali Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 230000002195 synergetic effect Effects 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000001045 blue dye Substances 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000002659 electrodeposit Substances 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 239000002932 luster Substances 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 2
- 239000001054 red pigment Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910021592 Copper(II) chloride Inorganic materials 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 238000002048 anodisation reaction Methods 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 1
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 1
- NWFNSTOSIVLCJA-UHFFFAOYSA-L copper;diacetate;hydrate Chemical compound O.[Cu+2].CC([O-])=O.CC([O-])=O NWFNSTOSIVLCJA-UHFFFAOYSA-L 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000001056 green pigment Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- -1 inductron blue Chemical compound 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000001053 orange pigment Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007592 spray painting technique Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- SWGJCIMEBVHMTA-UHFFFAOYSA-K trisodium;6-oxido-4-sulfo-5-[(4-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-2-sulfonate Chemical compound [Na+].[Na+].[Na+].C1=CC=C2C(N=NC3=C4C(=CC(=CC4=CC=C3O)S([O-])(=O)=O)S([O-])(=O)=O)=CC=C(S([O-])(=O)=O)C2=C1 SWGJCIMEBVHMTA-UHFFFAOYSA-K 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000012463 white pigment Substances 0.000 description 1
- 239000001052 yellow pigment Substances 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、アルミニウム材またはアルミニウム合金材の
電着塗装方法および電着塗装物に関し、特に、一種類の
塗料を用いて、耐食性、装飾性に優れ、かつ、グレート
ーンを呈する陽極酸化塗装複合皮膜を形成させる電着塗
装方法および電着塗装物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 for aluminum materials or aluminum alloy materials, and to electrodeposition coatings, and in particular, to improve corrosion resistance and decorative properties by using one type of paint. The present invention relates to an electrodeposition coating method for forming an anodic oxidation coating composite film that is excellent in color and exhibits a gray tone, and to an electrodeposition coated product.
［従来の技術］
近年、アルミニウムまたはアルミニウム合金ｃ以下、ア
ルミと称する］ （材）を用いた住宅用アルミサツシの
色として、白あるいは黒といった無彩色系統の色が好ま
れている。[Prior Art] In recent years, achromatic colors such as white or black have been preferred as colors for residential aluminum sashes made of aluminum or aluminum alloy (hereinafter referred to as aluminum).
このような嗜好に応じて、建材メーカー各社においては
、Ｔｉｅ、入り電着塗料により白の着色を、電解着色に
より黒の着色を行なっている。In response to such preferences, building material manufacturers are coloring products white using electrodeposition paint containing Tie and black using electrolytic coloring.
さらに、最近では、この両極端の色ではない中間色、す
なわちグレー系の色を望む声が高くなっている。Furthermore, recently, there has been an increasing demand for neutral colors that are not between these two extremes, that is, gray colors.
しかしながら、ユーザーから要望される色は、グレー色
を基調としながらも、明度、彩度が多岐に渡っている。However, although the colors requested by users are based on gray, they have a wide range of lightness and saturation.
したがって、ユーザーの要望にこたえるために、種々の
顔料により調色した塗料による静電スプレー塗装方法、
あるいは発色性元素Ｓｉ等を添加した発色合金を陽極酸
化する方法を用いてアルミへの着色が、行なわれている
。Therefore, in order to meet the needs of users, electrostatic spray painting methods using paints toned with various pigments,
Alternatively, aluminum is colored using a method of anodizing a color-forming alloy to which a color-forming element such as Si is added.
前者の方法は、塗装用スプレーガンを用いて、スプレー
ガンとアルミ被塗物との間に高い電場をかけ、スプレー
ガンから噴霧した、種々の顔料により調色した塗料粒子
を、電場の力でアルミ被塗物に引き寄せ、！！！装する
方法である。The former method uses a paint spray gun to apply a high electric field between the spray gun and the aluminum object to be coated, and the paint particles sprayed from the spray gun and colored with various pigments are colored by the force of the electric field. Attracts it to aluminum objects! ! ! This is a method of equipping.
後者の方法は、例えば、アルミ中にＳｉを添加した発色
合金を陽極酸化することにより、Ｓｉを溶解させずに陽
極酸化皮膜中に残存させ、グレー色を与える方法である
。The latter method is a method in which, for example, a color-forming alloy in which Si is added to aluminum is anodized, so that the Si remains in the anodized film without being dissolved, giving it a gray color.
［発明が解決しようとする課題］
しかしながら１種々の顔料により調色した塗料による静
電スプレー塗装方法は、顔料の変更により、色度えは容
易であるが、塗装単価が高く、また、生産性が低いとい
う問題点があった。[Problems to be Solved by the Invention] However, the electrostatic spray coating method using paints toned with various pigments makes it easy to achieve color saturation by changing the pigments, but the unit cost of coating is high, and productivity is low. There was a problem that the value was low.
また、発色元素を添加した発色合金を陽極酸化する方法
によりグレー色を与える場合には、素材となる発色合金
の単価が高いという問題点があった。Furthermore, when a gray color is imparted by a method of anodizing a color-forming alloy to which a color-forming element is added, there is a problem in that the unit price of the color-forming alloy as a raw material is high.
本発明の目的は、調色に手数がかからず、また、単価の
安い素材を用いて、グレートーンの着色塗装をすること
ができる電着塗装方法および電着塗装物を提供すること
である。An object of the present invention is to provide an electrodeposition coating method and an electrodeposition coated article that do not require much labor for color matching and can be colored in gray tones using inexpensive materials. .
［課題を解決するための手段］
本発明の電着塗装方法は、アルミニウム材またはアルミ
ニウム合金材に、陽極酸化処理を施し。[Means for Solving the Problems] In the electrodeposition coating method of the present invention, an aluminum material or an aluminum alloy material is subjected to anodizing treatment.
次に、電解着色処理によりブロンズ色系の電解着色皮膜
を形成した後、波長３８０ｎｍ〜５６０ｎｍに光線反射
率のピークを有する顔料を含む電着塗料を用いて、光線
透過率の積分値が５％〜３５％の塗膜を形成することに
より、陽極酸化塗装複合皮膜を形成することを特徴とす
る。Next, after forming a bronze-colored electrolytically colored film by electrolytic coloring treatment, an electrodeposition paint containing a pigment having a light reflectance peak at a wavelength of 380 nm to 560 nm is used to achieve an integrated value of light transmittance of 5%. It is characterized by forming an anodic oxidation coating composite film by forming a coating film of ~35%.
本発明の電着塗装方法は、前記塗膜の厚さを変化させる
ことにより、前記陽極酸化塗装複合皮膜の色を変化させ
ることができる。In the electrodeposition coating method of the present invention, the color of the anodized composite film can be changed by changing the thickness of the coating film.
また、前記ブロンズ色系の電解着色皮膜の色を変化させ
ることにより、前記陽極酸化塗装複合皮膜の色を変化さ
せることができる。Further, by changing the color of the bronze-colored electrolytically colored film, the color of the anodized composite film can be changed.
本発明の電着塗装物は、陽極酸化処理を施したアルミニ
ウム材またはアルミニウム合金材の上に、ブロンズ色系
の電解着色皮膜を有し、さらに、その上に、波長３８０
ｎ−〜５６０ｎｍに光線反射率のピークを有する顔料を
含む、光線透過率の積分値が５％〜３５％の塗膜を有す
ることを特徴とする。The electrodeposited product of the present invention has a bronze-colored electrolytically colored film on an anodized aluminum material or an aluminum alloy material, and further has a bronze-colored electrolytically colored film on the anodized aluminum material or aluminum alloy material.
It is characterized by having a coating film containing a pigment having a light reflectance peak at n-560 nm and having an integral value of light transmittance of 5% to 35%.
本発明の電着塗装方法により、種々の明度および彩度を
有するグレートーンの着色を行なうことができる。By the electrodeposition coating method of the present invention, gray tone coloring having various lightness and chroma can be performed.
なお、本願中で、グレートーンとは、陽極酸化塗装複合
皮膜の分光反射率曲線において、波長４００ｎｍ〜７０
０ｎｍの範囲の反射率の最大値と最小値との差を、分光
反射率曲線を関数ｇ （ｘ）として、波長４００ｎｉｅ
〜７００ｎｍの範囲で積分した値、
ｆ：：： ｇ （ｘ ）ｄｘ
で除した値が、０．７５以下のものを意味する。In addition, in this application, gray tone refers to a wavelength range of 400 nm to 70 nm in the spectral reflectance curve of an anodized composite film.
The difference between the maximum value and the minimum value of reflectance in the range of 0 nm is calculated using the spectral reflectance curve as a function g (x), and the wavelength is 400 nie.
It means that the value integrated over the range of ~700 nm, divided by f:::g(x)dx, is 0.75 or less.
本発明に従えば、電解着色皮膜の色、あるいは、電着塗
装により形成される塗膜の光線透過率を変化させること
により、アルミ材にグレー色を基調とした。明度、彩度
の異なるグレートーンを得ることができる。According to the present invention, by changing the color of the electrolytically colored film or the light transmittance of the coating film formed by electrodeposition, a gray color is imparted to the aluminum material. You can obtain gray tones with different brightness and saturation.
以下、本発明の工程について詳しく説明する。Hereinafter, the steps of the present invention will be explained in detail.
まず、アルミ材に前処理を施す。First, the aluminum material is pretreated.
前処理としては、陽極酸化処理を行なう場合に通常行な
われる処理が行なわれる。すなわち、アルミ表面の油を
除去する脱脂処理、ＮａＯＨ（アルカリ）でアルミ表面
を溶解して小さな凹凸を形成し、金属光沢をなくすエツ
チング処理、アルミ中に添加されている成分のうち、ア
ルカリで溶解せず、表面に付着しているスマット（汚れ
）を、除去するための中和処理、の３つの処理である。As the pretreatment, a treatment that is normally performed when anodizing treatment is performed is performed. Namely, degreasing treatment to remove oil from the aluminum surface, etching treatment to dissolve the aluminum surface with NaOH (alkali) to form small irregularities and eliminate metallic luster, and components added to aluminum that are dissolved with alkali. There are three treatments: neutralization treatment to remove smut (dirt) adhering to the surface.
次に、アルミ材に陽極酸化処理を行ない、陽極酸化皮膜
を生成する。Next, the aluminum material is anodized to form an anodized film.
形成された陽極酸化皮膜には、電解着色処理を行なうこ
とにより、着色を施す。The formed anodic oxide film is colored by electrolytic coloring treatment.
電解着色処理は、Ｎｉ、Ｓｎ等の金属塩を含有する水溶
液中で、交流、直流、あるいは、パルス波形の電圧を印
加して行なう。The electrolytic coloring treatment is performed in an aqueous solution containing a metal salt such as Ni or Sn by applying an alternating current, direct current, or pulse waveform voltage.
電解着色処理において、通電条件を変化させることによ
り、第１図に示すように１種々の色の着色皮膜を得るこ
とができる。In the electrolytic coloring process, by changing the energization conditions, colored films of various colors can be obtained as shown in FIG. 1.
このようにして得られる色は、すべてブロンズ系の濃淡
色である。The colors obtained in this way are all bronze-based shades of light and dark.
ブロンズ系の色とは、波長３８０〜７８０ｎ＋＊には、
光線反射率のピークを有さす、すべての可視光を反射し
、波長が長くなるとともに、反射率が増加する特性を有
する色をいう。−殻内には、茶褐色系の色の慣用名とし
て、建材業界で使われている色である。Bronze colors have wavelengths of 380 to 780n+*.
A color that has a peak light reflectance, reflects all visible light, and has the characteristic that the reflectance increases as the wavelength becomes longer. -The color inside the shell is a common name for the brown color, which is used in the building materials industry.
また、ブロンズ系の色について、ＪＩＳ規格による物体
色の測定方法に基づいて潤色を行ない、表色系、Ｌ＊Ｂ
＊ｂ＊で判断基準を示すと、ダークブロンズは、Ｌ＊が
２７〜３５．ブロンズは３５〜５０、ライトブロンズは
５０〜６５で示される。In addition, for bronze colors, coloring is performed based on the object color measurement method according to the JIS standard, and the color system, L*B
If *b* indicates the judgment criteria, dark bronze has an L* of 27 to 35. Bronze is indicated by 35-50, and light bronze is indicated by 50-65.
本願中で、光線透過率の積分値とは、塗膜の分光透過率
曲線を関数ｆ （ｘ）とし、波長４００ｎｍ〜７００ｎ
ｍの範囲で積分した値、
７” ４００ ｆ （ｘ ） ｄｘ
である。In this application, the integral value of light transmittance is defined as the spectral transmittance curve of the coating film as a function f (x), and the wavelength is 400 nm to 700 nm.
The value integrated over the range of m is 7'' 400 f (x) dx.
塗膜の分光透過率曲線のグラフを、第２図に示す。A graph of the spectral transmittance curve of the coating film is shown in FIG.
その光線透過率の積分値は、陽極酸化塗装複合皮膜の分
光反射率曲線の波長４００ｎｍ〜７００ｒｖの範囲の光
線反射率の最大値と最小値との差を、分光反射率曲線を
関数ｇ （ｘ）として波長４００ｎ１１〜７００ｎ１１
の範囲で積分した値、ｆ ４１１０ ｇ （ｘ ）
ｄＸで除した値との関係、すなわち、グレートーンの
範囲との関係より、５％〜３５％であり、好ましくは８
％〜２７％、特に好ましくは１０％〜２０％である。The integral value of the light transmittance is calculated by calculating the difference between the maximum value and the minimum value of the light reflectance in the wavelength range of 400 nm to 700 rv on the spectral reflectance curve of the anodized composite film, and converting the spectral reflectance curve into a function g (x ) as wavelength 400n11 ~ 700n11
The value integrated over the range of f 4110 g (x)
From the relationship with the value divided by dX, that is, the relationship with the gray tone range, it is 5% to 35%, preferably 8
% to 27%, particularly preferably 10% to 20%.
この範囲以外では、グレートーンの色から外れる。５％
以下では、塗膜により隠蔽されて塗膜独自の色となる。Outside this range, the color deviates from the gray tone. 5%
Below, it is hidden by the paint film and becomes a color unique to the paint film.
また、３５％以上では、′！４解着色皮膜とかわらない
色となって、塗膜と電解着色皮膜との相乗効果による種
々の色が出現されない。Also, at 35% or more, '! 4 The color is the same as that of the electrolytically colored film, and various colors due to the synergistic effect of the coating film and the electrolytically colored film do not appear.
第３図に、４４５ｎｍに光線反射率のピークを有する青
色の顔料を添加した塗料による、塗膜の光線透過率と、
光線反射率の最大値と最小値との差を所定の積分値で除
した値との関係を、グラフに示す。FIG. 3 shows the light transmittance of a paint film using a paint containing a blue pigment having a light reflectance peak at 445 nm.
The graph shows the relationship between the difference between the maximum value and the minimum value of light reflectance divided by a predetermined integral value.
第３図の場合、光線透過率の積分値は、５％〜３５％の
範囲で選択される。In the case of FIG. 3, the integral value of the light transmittance is selected in the range of 5% to 35%.
本発明に適用できる電着塗料は、アルミ材の陽極酸化皮
膜上に電着塗装できるタイプの塗料であればいかなる塗
料であっても良く、例えば、アクリル、ポリエステル、
アルキッド、フッ素系などの塗料を使用することができ
る。好ましくは、アクリル、フッ素等、耐候性が良好で
あり、黄変性を有しない塗料を選択することが望ましい
。The electrodeposition paint that can be applied to the present invention may be any type of paint that can be electrodeposited onto the anodic oxide film of aluminum, such as acrylic, polyester,
Paints such as alkyd and fluorine-based paints can be used. It is preferable to select a paint that has good weather resistance and does not cause yellowing, such as acrylic or fluorine paint.
着色顔料としては、波長３８０ｎｍ〜５６０ｎ−に光線
反射率のピークを有する顔料を使用する。As the colored pigment, a pigment having a light reflectance peak at a wavelength of 380 nm to 560 nm is used.
３８０ｎｍ未満の波長では、紫外線となるため、３８０
ｎ−未満の波長に光線反射率のピークを有する顔料は、
グレートーンの色に関係しない。Wavelengths less than 380 nm are ultraviolet rays, so 380 nm
A pigment having a peak of light reflectance at a wavelength less than n- is
It has nothing to do with gray tone colors.
また、波長５７０ｎ鳳〜７８０ｎｓ＋（黄、だいだい、
赤、紫赤）にピークまたは最大値を有する顔料を使用し
た場合、塗膜内に入射した光線は、短波長側よりも長波
長側で反射率が大きくなる。In addition, the wavelength 570n ~ 780ns + (yellow, large,
When using a pigment that has a peak or maximum value in the red, purple-red), the reflectance of light rays entering the coating film will be greater on the long wavelength side than on the short wavelength side.
この結果、第５図に示すように、複合皮膜の色は、電解
着色皮膜の色と大差がなくなり、長波長側にピークを有
する顔料は、グレートーンの色を得ることができない。As a result, as shown in FIG. 5, the color of the composite film is not much different from the color of the electrolytically colored film, and the pigment having a peak on the long wavelength side cannot obtain a gray tone color.
一方、３８０ｎｍ 〜５６０ｎｍ （紫、青、緑青、青
緑、緑）にピークを有する顔料を使用した場合には、入
射した光線は、塗膜内で、長波長側よりも短波長側で強
く反射する。このため、複合皮膜の色は、第６図に示す
ように、可視領域全域において、同程度の光線反射率を
有するようになる。On the other hand, when using pigments that have a peak between 380 nm and 560 nm (purple, blue, verdigris, blue-green, and green), the incident light rays are reflected more strongly on the short wavelength side than on the long wavelength side within the coating. do. Therefore, as shown in FIG. 6, the color of the composite film has the same level of light reflectance throughout the visible region.
この結果、３８０ｎｍ〜５６０ｒｖ （紫、青、緑青、
青緑、緑）にピークを有する顔料は、グレートーンの色
を得ることができる。As a result, 380nm to 560rv (purple, blue, green-blue,
Pigments with peaks in blue-green, green) can obtain gray-tone colors.
また、顔料は、単独系のほか、白顔料、黒顔料、赤顔料
、黄顔料等との混合系で用いることができる。Further, the pigment can be used alone or in a mixed system with a white pigment, a black pigment, a red pigment, a yellow pigment, etc.
顔料は、顔料粒径が０．０１μｍ〜２０μＬ好ましくは
、０．０１μｍ〜１０μ園の範囲の大きさとなるように
塗料中で分散される。The pigment is dispersed in the paint so that the pigment particle size ranges from 0.01 μm to 20 μL, preferably from 0.01 μm to 10 μL.
粒径が０．０１μ璽以下の場合には、塗膜中での反射を
利用することができず、２０μ園以上の場合には、塗膜
の外観が良くないからである。If the particle size is 0.01 μm or less, reflection in the coating film cannot be utilized, and if the particle size is 20 μm or more, the appearance of the coating film is not good.
顔料としては５例えば、単独系として、フタロシアニン
ブルー インダクトロンブルー、フタロシアニングリー
ン、塩臭素化フタロシアニングリーン等を使用すること
ができる。As the pigment, for example, phthalocyanine blue, inductron blue, phthalocyanine green, chlorobrominated phthalocyanine green, etc. can be used as a single system.
塗膜厚さは、５μ１１〜５ｏμＬ好ましくは、１０μｍ
〜３０μ閣の範囲で選択される。The coating film thickness is 5μ11 to 5oμL, preferably 10μm
Selected within the range of ~30 μm.
５μｍ以下の塗膜厚さでは、顔料粒子が塗膜表面に露出
して塗膜性能を低下させ、また、５０μｍ以上では、塗
膜外観がゆず肌になり適切でないためである。This is because if the coating thickness is less than 5 μm, the pigment particles will be exposed on the surface of the coating, reducing the coating performance, and if it is greater than 50 μm, the coating will have an orange-like appearance, which is not appropriate.
塗料中の顔料濃度は、塗膜厚さとの関係で、塗膜の透過
率の積分値が５％〜３５％になる量である。その濃度は
、通常、塗料中の重量％として、０．０５重量％〜１５
重量％が良いが、好ましくは、０．３重量％〜８重量％
が望ましい。The pigment concentration in the paint is such that the integral value of the transmittance of the paint film is 5% to 35% in relation to the paint film thickness. Its concentration is usually 0.05% to 15% by weight in the paint.
Weight% is good, preferably 0.3% to 8% by weight
is desirable.
顔料濃度がこの範囲にあるとき、塗膜表面、塗膜中（顔
料粒子）、塗Ｉｌｌ／素地界面の各々の反射を利用して
、塗膜と電解着色皮膜との相乗効果により、アルミ上に
グレートーンの色を得ることができる。When the pigment concentration is within this range, the synergistic effect between the paint film and the electrolytically colored film takes advantage of the reflections on the paint film surface, in the paint film (pigment particles), and at the paint/substrate interface, resulting in a coating on aluminum. You can get gray tone colors.
顔料濃度が、０．０５重量％以下では、塗膜中（顔料粒
子）の反射が不十分で、顔料の色の効果が発揮できず、
また、１５重量％以上では、塗膜の隠蔽性のため塗膜独
自の色となり、塗膜と電解着色皮膜との相乗効果による
種々の色が出現されない。When the pigment concentration is 0.05% by weight or less, the reflection in the coating film (pigment particles) is insufficient and the color effect of the pigment cannot be exhibited.
Moreover, if it is 15% by weight or more, the coating film will have its own color due to its hiding property, and various colors due to the synergistic effect of the coating film and the electrolytically colored film will not appear.
本塗料にて、電着塗装を実施する場合の電着塗料浴の固
形分濃度としては、３〜１５重量％が好適である。When carrying out electrodeposition coating with this paint, the solid content concentration of the electrodeposition paint bath is preferably 3 to 15% by weight.
固形分濃度が、３重量％以下では、前述した所定の塗膜
厚さを得難く、１５重量％以上では、塗装系の系外への
損失が大きく経済的でないからである。If the solid content concentration is 3% by weight or less, it is difficult to obtain the above-mentioned predetermined coating film thickness, and if it is 15% by weight or more, the loss to the outside of the coating system is large and it is not economical.
塗膜厚さ、顔料濃度、および、光線透過率の積分値との
関係を、第８図に示す。The relationship between coating film thickness, pigment concentration, and integral value of light transmittance is shown in FIG.
電着塗装は、電着塗料浴温が１５〜３５℃、塗装電圧が
８０〜３００Ｖ、処理時間が１〜５分の条件で１通常、
行われる。Electrodeposition coating is performed under the following conditions: the electrocoat bath temperature is 15 to 35°C, the coating voltage is 80 to 300V, and the processing time is 1 to 5 minutes.
It will be done.
電着塗装されたアルミ被塗物は、水洗いされ、ついで、
１５０〜２００℃で１５〜６０分間、加熱硬化される。The electrodeposited aluminum object is washed with water, and then
It is heat cured at 150 to 200°C for 15 to 60 minutes.
加熱硬化させる前に水洗いするのは、水洗いしないとき
、電着されたアルミ被塗物の表面に付着している、電着
されていない塗料が加熱硬化されて、電着表面の均一性
を失い、所望の色の電着塗膜が得られないためである。Washing with water before heating and curing is because if you do not wash with water, the unelectrodeposited paint that is attached to the surface of the electrodeposited aluminum object will be heated and hardened, causing the electrodeposited surface to lose its uniformity. This is because an electrodeposited coating film of the desired color cannot be obtained.
このようにして得られた塗膜と電解着色皮膜との相乗効
果により、再現性良く、種々の色が出現することが確認
された。It was confirmed that various colors appeared with good reproducibility due to the synergistic effect of the coating film thus obtained and the electrolytically colored film.
本発明により種々の色が出現する機構は、十分に明らか
ではないが、第４図に示すように推察される。Although the mechanism by which various colors appear according to the present invention is not fully clear, it is inferred as shown in FIG. 4.
まず、入射した光は、矢印（ａ）で示すように、塗膜表
面で一部反射し、残りは塗膜中へ入射する。First, as shown by arrow (a), part of the incident light is reflected on the surface of the coating film, and the rest enters into the coating film.
塗膜中に入射した光は、顔料粒子にぶつかり。The light that enters the paint film hits the pigment particles.
散乱あるいは反射吸収を繰り返しながら、矢印（ｂ）の
ように塗膜中を透過し、塗膜／皮膜界面に達し、一部は
矢印（ｃ）のように反射され、残りは矢印（ｄ）に示す
ように、陽極酸化皮膜へ入射する。While repeating scattering, reflection and absorption, it passes through the paint film as shown by the arrow (b) and reaches the paint film/film interface, where some of it is reflected as shown by the arrow (c) and the rest goes in the direction of the arrow (d). As shown, the light is incident on the anodic oxide film.
陽極酸化皮膜に入射した光は、電析した金属あるいは酸
化物に吸収されながら皮膜／アルミ素地界面に達して、
矢印（ｅ）に示すように反射される。The light incident on the anodic oxide film reaches the film/aluminum substrate interface while being absorbed by the deposited metal or oxide.
It is reflected as shown by arrow (e).
このような光学的機構により、塗膜と陽極酸化皮膜との
複合された色を呈するものと考えられる。It is thought that such an optical mechanism provides a composite color of the coating film and the anodic oxide film.
ここで、顔料の径および顔料濃度が所望の状態に調整さ
れた塗料を使用する場合、複合皮膜の色を左右する因子
として、塗膜の光線透過率と電解着色した陽極酸化皮膜
の明度との二つがある。When using a paint whose pigment diameter and pigment concentration are adjusted to the desired state, the factors that affect the color of the composite film are the light transmittance of the paint film and the brightness of the electrolytically colored anodic oxide film. There are two.
この二つの因子は、それぞれ複合皮膜の色に及ぼす効果
が異なっている。These two factors have different effects on the color of the composite film.
塗膜の透過率は、塗膜の厚さと反比例の関係にあり、塗
膜の厚さが厚くなると、陽極酸化皮膜への入射光が減少
し、塗膜中での散乱、反射、吸収が増加して彩度が大き
くなる。The transmittance of a paint film is inversely proportional to the thickness of the paint film; as the thickness of the paint film increases, the amount of light incident on the anodized film decreases, and scattering, reflection, and absorption within the paint film increases. The color saturation increases.
一方、電解着色処理により皮膜中の電析物の量を増加さ
せ、陽極酸化皮膜の明度を低くすると。On the other hand, if the amount of electrodeposit in the film is increased by electrolytic coloring treatment and the brightness of the anodic oxide film is lowered.
電析物による光の吸収が増して、反射されて戻ってくる
光が減るため、複合皮膜は、明度の低い色となる。The composite film has a lower brightness color because more light is absorbed by the deposits and less light is reflected back.
次に、本発明の電着塗装方法を、電解着色した陽極酸化
皮膜を染料で染色し、混色を出現させる方法と比較して
、その明らかな違いについて説明する。Next, the obvious differences between the electrodeposition coating method of the present invention and a method of dyeing an electrolytically colored anodic oxide film with a dye to create mixed colors will be explained.
例えば、青色系染料でブロンズ色の電解着色皮膜を染色
すると、第７図に示す分光反射率曲線を有し、５５０ｎ
ｍにピークを持つ緑色を呈する。For example, when a bronze-colored electrolytically colored film is dyed with a blue dye, it has a spectral reflectance curve shown in Figure 7, with a 550 nm
It exhibits a green color with a peak at m.
この理由は、入射した光が、陽極酸化皮膜に吸着した染
料の層で、散乱や反射現象を伴わず、電析物の層で吸収
され、さらに、皮膜／アルミ素地界面で反射されるため
である。The reason for this is that the incident light is absorbed by the dye layer adsorbed on the anodic oxide film, without any scattering or reflection phenomenon, and is then reflected by the electrodeposit layer and then reflected at the film/aluminum substrate interface. be.
電解着色皮膜に、染料を添加した塗料で電着塗装した場
合も、同様である。The same applies when the electrolytically colored film is electrodeposited with a paint containing a dye.
このように、青色系染料を使用した場合には、使用した
染料の色相とは異なる色相を呈する。In this way, when a blue dye is used, the color exhibits a hue different from that of the dye used.
これに対して、青色系顔料を使用した場合には、塗膜中
で散乱および反射が起こるため、色の変化が極めて少な
く、グレー色を基調とした明度、彩度の異なるグレート
ーンが出現する。On the other hand, when blue pigments are used, scattering and reflection occur in the paint film, resulting in very little color change and the appearance of gray tones with different brightness and saturation based on gray color. .
従って、本発明の電着塗装方法は、染料で染色し、混色
を出現させる方法とは、異なっている。Therefore, the electrodeposition coating method of the present invention is different from a method of dyeing with a dye to create mixed colors.
また、電着塗装方法と同様、安価な塗装方法として、浸
漬塗装方法があり、一部で使用されている。Further, similar to the electrodeposition coating method, there is a dip coating method as an inexpensive coating method, and it is used in some cases.
しかしながら、浸漬塗装方法は、以下の点で好ましくな
い。However, the dip coating method is not preferable due to the following points.
アルミ押出し型材の表面は、平滑でなく、その表面には
、数多くの凹凸がある。アルミの押出し加工を行なうと
、ダイ（金型）の表面状態がそのままアルミの表面に写
しだされ、ダイマーク（ダイスマーク）が付けられる。The surface of an aluminum extrusion material is not smooth and has many irregularities. When aluminum is extruded, the surface condition of the die (mold) is directly copied onto the aluminum surface, creating a die mark.
浸漬塗装方法では、コーナ一部分およびアルミ素地表面
に付けられたダイマークの凸部の塗膜厚さが薄くなる。In the dip coating method, the coating film thickness is thinner at some corners and at the convex portion of the die mark attached to the surface of the aluminum substrate.
従って、浸漬塗装方法では、塗膜が箇所によって厚さが
違うため、その箇所によって塗膜の光線透過率が異なる
。その結果、浸漬塗装方法では、箇所によって色が異な
り、全体として、本発明で用いる電着塗装方法のような
均一な色を得ることができないので、電着塗装方法の代
わりに浸漬塗装方法を用いることは、好ましくない。Therefore, in the dip coating method, since the thickness of the coating film differs depending on the location, the light transmittance of the coating film differs depending on the location. As a result, with the dip coating method, the color varies depending on the location, and it is not possible to obtain a uniform color as a whole like the electrodeposition coating method used in the present invention, so the dip coating method is used instead of the electrodeposition coating method. That's not good.
［実施例］ 以下、本発明の実施例について説明する。[Example] Examples of the present invention will be described below.
まず、光線透過率の測定、光線反射率の測定、並びに、
皮膜および塗膜の厚さの測定について述べる。First, measurement of light transmittance, measurement of light reflectance, and
The measurement of film and coating thickness will be described.
（光線透過率の測定）
アルミ材を陽極酸化、電解着色、電着塗装後、１８０℃
で３０分間焼き付ける。(Measurement of light transmittance) After anodic oxidation, electrolytic coloring, and electrodeposition coating of aluminum material, 180℃
Bake for 30 minutes.
次に１ｗＩ４定面の反対側から塗膜、皮膜をそれぞれ剥
離後、ＮａＯＨで溶解する。Next, the coating film and film were peeled off from the opposite side of the 1wI4 constant surface, and then dissolved with NaOH.
そして、Ａｌ素地を、０．１Ｍ濃度のＣｕＣｌ２と２０
％ＨＣＩの混合液を用いて、浸漬溶解する。Then, the Al substrate was coated with CuCl2 at a concentration of 0.1M and 20
Dissolve by immersion using a mixed solution of % HCI.
このようにして得られた塗膜と陽極酸化皮膜のフィルム
状複合皮膜を、２０℃の５％ＨＮ Ｏ、水溶液に２０分
間浸漬し、電解着色皮膜のみ化学溶解する。The film-like composite film of the coating film and the anodized film thus obtained is immersed in a 5% HN O aqueous solution at 20° C. for 20 minutes to chemically dissolve only the electrolytically colored film.
塗膜の皮膜に接する側の表面には、小さな凹凸が数多く
あり、拡散反射して真の透過率が得られないため、塗膜
の皮膜に接する側に、常温乾燥タイプの透明アクリル塗
料を塗布し、乾燥する。The surface of the paint film that comes in contact with the film has many small irregularities that cause diffuse reflection and prevent true transmittance. Therefore, a transparent acrylic paint that dries at room temperature is applied to the side of the paint film that comes into contact with the film. and dry.
素地のアルミおよび陽極酸化皮膜を溶解した塗膜１を、
第９図で示す分光光度計の図の位置に取り付ける。Coating film 1 in which the base aluminum and anodized film are dissolved,
Attach the spectrophotometer to the position shown in Figure 9.
そして、塗膜１の透過率を、以下のような分光光度計に
より、所定の波長の光を入射して、測定する。Then, the transmittance of the coating film 1 is measured using a spectrophotometer as described below, with light of a predetermined wavelength being incident thereon.
分光光度計の積分球２の内側には、酸化マグネシウムが
塗られており、完全拡散反射面を有している。そのため
、透過した光は、白色板３で反射された後、積分球２内
で多重反射を繰返すので。The inside of the integrating sphere 2 of the spectrophotometer is coated with magnesium oxide and has a completely diffuse reflective surface. Therefore, the transmitted light undergoes multiple reflections within the integrating sphere 2 after being reflected by the white plate 3.
積分球２のどの位置で測定しても、光の強さは同じ状態
になっている。No matter where the measurement is made on the integrating sphere 2, the intensity of the light remains the same.
そこで、積分球２の一部に、光電管検出器を設置し、左
側から何もない状態で入射した光との強度比で測定を行
なう。Therefore, a phototube detector is installed in a part of the integrating sphere 2, and measurements are made based on the intensity ratio of the light incident from the left side without any light.
このような操作を３８０ｎｍ〜７８０ｎｍの範囲で２ｎ
ｍごとに行なう。This operation was performed at 2n in the range of 380nm to 780nm.
Do this every m.
（光線反射率の測定）
アルミ材を陽極酸化処理、電解着色処理、および、電着
塗装処理後、１８０℃で３０分間焼き付けて複合皮膜を
作成する。(Measurement of light reflectance) After the aluminum material is anodized, electrolytically colored, and electrodeposited, it is baked at 180° C. for 30 minutes to create a composite film.
その試料の陽極酸化塗装複合皮膜４を１分光光度計の第
１０図に示す位置に取り付け、分光光度計により、光線
透過率の測定とほぼ同様の測定原理で測定する。The anodized composite coating 4 of the sample is attached to a spectrophotometer at the position shown in FIG. 10, and measured using the spectrophotometer using almost the same measurement principle as the measurement of light transmittance.
（皮膜および塗膜の厚さの測定）
ＪＩＳ Ｈ８６８０に規定のうず電流式厚さ測定器を
用いて、測定する。(Measurement of thickness of film and coating) Measurement is performed using an eddy current thickness measuring device specified in JIS H8680.
［実施例１］
アルミ押出材（ＪＩＳ Ｈ４１００に規定のＡ６０６
３−７５）に通常の前処理を施した。[Example 1] Aluminum extrusion material (A606 specified in JIS H4100)
3-75) was subjected to usual pretreatment.
通常の前処理とは、アルミ表面の油を除去する脱脂処理
、ＮａＯＨ（アルカリ）でアルミ表面を溶解して小さな
凹凸を形成し、金属光沢をなくすエツチング処理、アル
ミ中に添加されている成分のうち、アルカリで溶解せず
に表面に付着しているスマット（汚れ）を除去するため
の中和処理の３つの処理である。Typical pretreatments include degreasing to remove oil from the aluminum surface, etching to dissolve the aluminum surface with NaOH (alkali) to form small irregularities and eliminate metallic luster, and remove ingredients added to the aluminum. Among these, three treatments are neutralization treatment to remove smut (dirt) that is not dissolved by alkali and adheres to the surface.
次に、液温２０℃の１５０ｇ／Ｑの硫酸液中で陽極電解
処理し、９μｍの陽極酸化皮膜を形成した。Next, anodic electrolysis treatment was performed in a 150 g/Q sulfuric acid solution at a liquid temperature of 20° C. to form an anodic oxide film of 9 μm.
次に、Ｎｉを含む金属塩水溶液中で、対極を陽極として
所定の通電時間、電解着色を行い、ライトブロンズの着
色皮膜を得た。Next, electrolytic coloring was performed in a metal salt aqueous solution containing Ni for a predetermined energization time using the counter electrode as an anode to obtain a light bronze colored film.
さらに、顔料濃度（灰分）２％、４４５ｒｖ＋に光線反
射率のピークを有する、青顔料入り熱硬化型アクリル樹
脂塗料パワーマイトエナメル（日本ペイント社製）を用
いて、塗膜厚さ１５μｍ（光線透過率の積分値は１５％
）の電着塗装を行った。Furthermore, using Power Mite Enamel (manufactured by Nippon Paint Co., Ltd.), a thermosetting acrylic resin paint containing blue pigment, which has a pigment concentration (ash content) of 2% and a light reflectance peak at 445 rv+, a coating film thickness of 15 μm (light transmission The integral value of the rate is 15%
) was applied by electrodeposition.
この結果、ライトグレーの複合皮膜が得られた。As a result, a light gray composite film was obtained.
なお、色の判定は、色彩計を使用して行なった。Note that the color was determined using a colorimeter.
［実施例２］
アルミ押出材（ＪＩＳ ）１ ４１００に規定のＡ６
０６３−Ｔ５）に対し、実施例１と同様に、通常の前処
理を施した後、液温２０℃、１５０ｇ／Ｑの硫酸液中で
陽極電解処理し、９μ鳳の陽極酸化皮膜を形成した。[Example 2] Aluminum extrusion material (JIS) A6 specified in 1 4100
063-T5) was subjected to the usual pretreatment in the same manner as in Example 1, and then subjected to anodic electrolysis treatment in a 150 g/Q sulfuric acid solution at a liquid temperature of 20°C to form an anodic oxide film of 9μ. .
次に、Ｎｉを含む金属塩水溶液中で、対極を陽極として
所定の通電時間、電解着色を行い、ブロンズの着色皮膜
を得た。Next, electrolytic coloring was performed in a metal salt aqueous solution containing Ni for a predetermined energization time using the counter electrode as an anode to obtain a bronze colored film.
さらに、実施例１と同様に、光線透過率の積分値が１５
％となる電着塗装を行った。Furthermore, as in Example 1, the integral value of the light transmittance was 15
% electrodeposition coating was performed.
この結果、グレーの複合皮膜が得られた。As a result, a gray composite film was obtained.
［実施例３］
実施例１，２と同様のアルミ押出材（Ａ６０６３−Ｔ５
）に、実施例１，２と同様に通常の前処理を施した後、
液温２０℃、１５０ｇ／Ｑの硫酸液中で陽極電解処理し
、９μｍの陽極酸化皮膜を形成した。[Example 3] Aluminum extrusion material similar to Examples 1 and 2 (A6063-T5
) was subjected to the usual pretreatment in the same manner as in Examples 1 and 2,
Anodic electrolysis treatment was carried out in a 150 g/Q sulfuric acid solution at a liquid temperature of 20° C. to form an anodic oxide film of 9 μm.
次に、Ｎｉを含む金属塩水溶液中で、対極を陽極として
所定の通電時間、電解着色を行い、ダークブロンズの着
色皮膜を得た。Next, electrolytic coloring was performed in a metal salt aqueous solution containing Ni for a predetermined energization time using the counter electrode as an anode to obtain a dark bronze colored film.
さらに、実施例１，２と同様の、青顔料入り熱硬化型ア
クリル樹脂塗料パワーマイトエナメル（日本ペイント社
製）を用いて、塗膜厚さ１５μｍ（光線透過率の積分値
は１５％）の電着塗装を行った。Furthermore, using the same blue pigmented thermosetting acrylic resin paint Powermite Enamel (manufactured by Nippon Paint Co., Ltd.) as in Examples 1 and 2, a coating film thickness of 15 μm (integrated value of light transmittance was 15%) was applied. Electrodeposition painting was performed.
この結果、ダークグレーの複合皮膜が得られた。As a result, a dark gray composite film was obtained.
［実施例４］
上記実施例と同様のアルミ押出材（Ａ６０６３−Ｔ５）
に、第３実施例と同様の前処理、陽極酸化処理、および
、所定の通電時間の電解着色処理を行い、ダークブロン
ズの着色皮膜を得た。[Example 4] Aluminum extrusion material (A6063-T5) similar to the above example
Then, the same pretreatment, anodic oxidation treatment, and electrolytic coloring treatment as in the third example were performed, and a dark bronze colored film was obtained.
次に、上記実施例と同様の、青顔料入り熱硬化型アクリ
ル樹脂塗料パワーマイトエナメル（日本ペイン１−社製
）を用いて、塗膜厚さ２０μｌ＋（光線透過率の積分値
は１０％）の電着塗装を行った。Next, using the same blue pigmented thermosetting acrylic resin paint Powermite Enamel (manufactured by Nippon Pain 1- Co., Ltd.) as in the above example, a coating film thickness of 20 μl + (integrated value of light transmittance was 10%) was applied. Electrodeposition coating was performed.
この結果、ダークグレイッシュの複合皮膜が得られた。As a result, a dark grayish composite film was obtained.
［実施例５コ
上記実施例と同様のアルミ押出材（＾６０６３−７５）
に、第２実施例と同様の前処理、陽極酸化処理、および
、所定の通電時間の電解着色処理を行い、ブロンズの着
色皮膜を得た。[Example 5] Aluminum extrusion material similar to the above example (6063-75)
Then, the same pretreatment, anodic oxidation treatment, and electrolytic coloring treatment for a predetermined energization time as in the second example were performed to obtain a bronze colored film.
次に、顔料濃度（灰分）５％、５０７ｎｎ＋に光線反射
率のピークを有する、緑顔料入り熱硬化型アクリル樹脂
塗料パワーマイトエナメル（日本ペイント社製）を用い
て、塗膜厚さ１５μｍ（光線透過率の積分値は１０％）
の電着塗装を行った。Next, using Power Mite Enamel (manufactured by Nippon Paint Co., Ltd.), a thermosetting acrylic resin paint containing green pigment, which has a pigment concentration (ash content) of 5% and a light reflectance peak at 507 nn+, a coating film thickness of 15 μm (light beam The integral value of transmittance is 10%)
Electrodeposition coating was performed.
この結果、グレー系の複合皮膜が得られた。As a result, a gray composite film was obtained.
［比較例１コ
上記実施例と同様のアルミ押出材（Ａ６０６３−Ｔ５）
に、実施例２と同様の前処理、陽極酸化処理、および、
電解着色処理を行い、ブロンズの着色皮膜を得た。[Comparative Example 1] Aluminum extrusion material (A6063-T5) similar to the above example
The same pretreatment as in Example 2, anodization treatment, and
Electrolytic coloring treatment was performed to obtain a bronze colored film.
次に、顔料濃度（灰分）０．５％、４４５ｎ鵬に光線反
射率のピークを有する。青顔料入り熱硬化型アクリル樹
脂塗料パワーマイトエナメル（日本ペイント社製）を用
いて、塗膜厚さ１５μｍ（光線透過率の積分値は４０％
）の電着塗装を行った。Next, when the pigment concentration (ash content) is 0.5%, the light reflectance has a peak at 445 nm. Using Power Mite Enamel (manufactured by Nippon Paint Co., Ltd.), a thermosetting acrylic resin paint containing blue pigment, the coating thickness was 15 μm (the integrated value of light transmittance was 40%).
) was applied by electrodeposition.
この結果、ブロンズの複合皮膜が得られ、グレー系の複
合皮膜を得ることはできなかった。As a result, a bronze composite film was obtained, and a gray composite film could not be obtained.
［比較例２］
上記実施例と同様のアルミ押出材（Ａ６０６３−Ｔ５）
に、実施例２と同様の前処理、陽極酸化処理、および電
解着色処理を行い、ブロンズの着色皮膜を得た。[Comparative Example 2] Aluminum extrusion material (A6063-T5) similar to the above example
Then, the same pretreatment, anodic oxidation treatment, and electrolytic coloring treatment as in Example 2 were performed to obtain a bronze colored film.
次に、顔料濃度（灰分）１５％、４４５ｎｍに光線反射
率のピークを有する。青顔料入り熱硬化型アクリル樹脂
塗料パワーマイトエナメル（日本ペイント社製）を用い
て、塗膜厚さ１０μＩｌ（光線透過率の積分値は０％）
の電着塗装を行った。Next, the pigment concentration (ash content) is 15%, and the light reflectance has a peak at 445 nm. Using Power Mite Enamel (manufactured by Nippon Paint Co., Ltd.), a thermosetting acrylic resin paint containing blue pigment, the coating thickness was 10μIl (integral value of light transmittance was 0%).
Electrodeposition coating was performed.
この結果、ブルー系の複合皮膜が得られ、グレー系の複
合皮膜を得ることはできなかった。As a result, a blue-colored composite film was obtained, and a gray-based composite film could not be obtained.
［比較例３］
上記実施例と同様のアルミ押出材（Ａ６０６３−Ｔ５）
に、実施例２と同様の前処理、陽極酸化処理及び電解着
色処理を行い、ブロンズの着色皮膜を得た。[Comparative Example 3] Aluminum extrusion material (A6063-T5) similar to the above example
Then, the same pretreatment, anodic oxidation treatment, and electrolytic coloring treatment as in Example 2 were performed to obtain a bronze colored film.
次に、顔料濃度（灰分）５％、６０５ｎｍに光線反射率
のピークを有する、オレンジ顔料入り熱硬化型アクリル
樹脂塗料パワーマイトエナメル（日本ペイント社製）を
用いて、塗膜厚さ１５μ■（光線透過率の積分値は１０
％）の電着塗装を行った・
この結果、ダル・ブロンズ系の複合皮膜が得られ、グレ
ー系の複合皮膜を得ることはできなかった。Next, using Power Mite Enamel (manufactured by Nippon Paint Co., Ltd.), a thermosetting acrylic resin paint containing orange pigment, which has a pigment concentration (ash content) of 5% and a light reflectance peak at 605 nm, a coating film thickness of 15 μm ( The integral value of light transmittance is 10
%). As a result, a dull bronze composite film was obtained, and a gray composite film could not be obtained.
上記実施例および比較例の結果を、以下に、表に示す。The results of the above Examples and Comparative Examples are shown in the table below.
［発明の効果］
本発明によれば、一般に、安価とされる電着塗装方法を
用いて、アルミ上にグレー色を基調とした種々の明度と
彩度に加えて深みのある高級な透明感を有する複合皮膜
を、材料に無駄がなく経済的に形成することができる。[Effects of the Invention] According to the present invention, by using an electrodeposition coating method that is generally considered to be inexpensive, aluminum can be coated with various lightness and saturation based on gray color, as well as deep and high-grade transparency. It is possible to economically form a composite film with no waste of materials.
発現されたグレートーンのアルミ塗装物は、深みのある
魅力的な透明感をそなえており、用途の拡大面からも産
業上極めて有用である。The gray-tone aluminum coating that has been developed has a deep and attractive transparency, and is extremely useful industrially in terms of expanding its applications.
【図面の簡単な説明】
第１図は電解着色皮膜の分光反射率曲線を示すグラフ、
第２図は塗膜の分光透過率曲線を示すグラフ、第３図は
塗膜の光線透過率と、陽極酸化塗装複合皮膜の光線反射
率の最大値から最小値を引いたものを積分値で除したも
のとの関係を示すグラフ、第４図は陽極酸化複合皮膜の
光学的な機構を説明するための複合皮膜の概略断面図、
第５図は赤系の顔料を使用した複合皮膜の分光反射率曲
線を示すグラフ、第６図は前糸の顔料を使用した複合皮
膜の分光反射率曲線を示すグラフ、第７図は前糸の染料
で染色した電界着色皮膜の分光反射率曲線を示すグラフ
、第８図は顔料濃度および厚さと光線透過率の積分値と
の関係を示すグラフ、第９図は光線透過率の測定に用い
られる分光光度計の概略断面図、第１０図は光線反射率
の測定に用いられる分光光度計の概略断面図である。
１・・・塗膜、２・・・積分球、３・・・白色板、４・
・・陽極酸化塗装複合皮膜。
光線透過率
（＠／、）[Brief explanation of the drawings] Figure 1 is a graph showing the spectral reflectance curve of the electrolytically colored film.
Figure 2 is a graph showing the spectral transmittance curve of the paint film, and Figure 3 is the integral value of the light transmittance of the paint film and the minimum value subtracted from the maximum value of the light reflectance of the anodized composite film. Figure 4 is a schematic cross-sectional view of the composite film to explain the optical mechanism of the anodized composite film.
Figure 5 is a graph showing the spectral reflectance curve of a composite film using red pigment, Figure 6 is a graph showing the spectral reflectance curve of a composite film using the pigment of the front thread, and Figure 7 is a graph showing the spectral reflectance curve of the composite film using the pigment of the front thread. Figure 8 is a graph showing the relationship between pigment concentration and thickness and the integral value of light transmittance, and Figure 9 is a graph showing the relationship between the pigment concentration and thickness and the integral value of light transmittance. FIG. 10 is a schematic cross-sectional view of a spectrophotometer used for measuring light reflectance. 1... Paint film, 2... Integrating sphere, 3... White plate, 4...
...Anodic oxidation coating composite film. Light transmittance (@/,)
Claims (1)
酸化処理を施し、次に、電解着色処理によりブロンズ色
系の電解着色皮膜を形成した後、波長３８０ｎｍ〜５６
０ｎｍに光線反射率のピークを有する顔料を含む電着塗
料を用いて、光線透過率の積分値が５％〜３５％の塗膜
を形成することにより、陽極酸化塗装複合皮膜を形成す
ることを特徴とする電着塗装方法。 ２、前記塗膜の厚さを変化させることにより、前記陽極
酸化塗装複合皮膜の色を変化させることを特徴とする請
求項１記載の電着塗装方法。 ３、前記ブロンズ色系の電解着色皮膜の色を変化させる
ことにより、前記陽極酸化塗装複合皮膜の色を変化させ
ることを特徴とする請求項１または２記載の電着塗装方
法。 ４、陽極酸化処理を施したアルミニウム材またはアルミ
ニウム合金材の上に、ブロンズ色系の電解着色皮膜を有
し、さらに、その上に、波長３８０ｎｍ〜５６０ｎｍに
光線反射率のピークを有する顔料を含む、光線透過率の
積分値が５％〜３５％の塗膜を有することを特徴とする
電着塗装物。[Claims] 1. After anodizing an aluminum material or an aluminum alloy material and then forming a bronze-colored electrolytically colored film by electrolytic coloring,
It is possible to form an anodic oxidation coating composite film by forming a coating film with an integral value of light transmittance of 5% to 35% using an electrodeposition paint containing a pigment having a light reflectance peak at 0 nm. Characteristic electrodeposition coating method. 2. The electrodeposition coating method according to claim 1, wherein the color of the anodized composite film is changed by changing the thickness of the coating film. 3. The electrodeposition coating method according to claim 1 or 2, wherein the color of the anodized composite film is changed by changing the color of the bronze-colored electrolytically colored film. 4. It has a bronze-colored electrolytically colored film on the anodized aluminum material or aluminum alloy material, and further contains a pigment having a light reflectance peak at a wavelength of 380 nm to 560 nm. An electrodeposition coated article having a coating film having an integral value of light transmittance of 5% to 35%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32111289A JP2895537B2 (en) | 1989-12-11 | 1989-12-11 | Electrodeposition method and electrodeposition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32111289A JP2895537B2 (en) | 1989-12-11 | 1989-12-11 | Electrodeposition method and electrodeposition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03183798A true JPH03183798A (en) | 1991-08-09 |
| JP2895537B2 JP2895537B2 (en) | 1999-05-24 |
Family
ID=18128957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32111289A Expired - Fee Related JP2895537B2 (en) | 1989-12-11 | 1989-12-11 | Electrodeposition method and electrodeposition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2895537B2 (en) |
-
1989
- 1989-12-11 JP JP32111289A patent/JP2895537B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2895537B2 (en) | 1999-05-24 |
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