JP2883507B2 - Painted metal body and method of manufacturing the same - Google Patents
Painted metal body and method of manufacturing the sameInfo
- Publication number
- JP2883507B2 JP2883507B2 JP5047912A JP4791293A JP2883507B2 JP 2883507 B2 JP2883507 B2 JP 2883507B2 JP 5047912 A JP5047912 A JP 5047912A JP 4791293 A JP4791293 A JP 4791293A JP 2883507 B2 JP2883507 B2 JP 2883507B2
- Authority
- JP
- Japan
- Prior art keywords
- coating
- metal body
- resin coating
- resin
- modified silicone
- 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.)
- Expired - Fee Related
Links
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は主としてトンネル内装
板、橋梁用防護柵、道路柵、標識支柱等の道路関連製品
及び建築物の内外装等に使用され、耐食性、耐候性、耐
汚染性に優れた塗装金属体およびその製造方法に関する
ものである。BACKGROUND OF THE INVENTION The present invention is mainly used for road-related products such as tunnel interior boards, bridge fences, road fences, sign posts, etc., and interior and exterior of buildings, and is used for corrosion resistance, weather resistance, and pollution resistance. The present invention relates to an excellent coated metal body and a method for manufacturing the same.
【0002】[0002]
【従来の技術】従来、トンネル内装板、橋梁用防護柵、
道路柵、標識支柱等の道路関連製品及び建築物の内外装
等に使用される塗装金属体の製造方法としては、金属体
に、アクリル樹脂やウレタン樹脂等の液状塗料を塗布す
る方法と、エポキシ樹脂、アクリル樹脂、ポリエステル
等の粉体塗料を粉体塗装する方法とがあった。2. Description of the Related Art Conventionally, tunnel interior boards, bridge protective fences,
Methods for manufacturing painted metal bodies used for road-related products such as road fences and sign posts and interior and exterior of buildings include a method of applying a liquid paint such as an acrylic resin or a urethane resin to a metal body, and a method of applying an epoxy resin. There is a method of powder-coating a powder coating such as resin, acrylic resin, and polyester.
【0003】[0003]
【発明が解決しようとする課題】しかしながら上記の如
き液状塗料を塗布する前者の製造方法にあっては、金属
体に形成される塗膜は表面の平滑性に優れているもの
の、1回の塗装で形成される塗膜の厚みが薄いため、耐
食性を向上させるためには何度も重ね塗りをして塗膜の
厚みを厚くする必要があり、塗装に時間がかかってい
た。また液状塗料は塗料中の溶剤等に起因して塗膜にピ
ンホールが生成されやすく、ピンホールが生成されてい
るとそこから腐食が容易に発生していた。さらに一般に
使用されているアクリル樹脂やウレタン樹脂からなる液
状塗料については、耐候性や耐汚染性も劣っていた。However, in the former manufacturing method of applying a liquid paint as described above, the coating film formed on the metal body has excellent surface smoothness, but the coating is performed once. In order to improve the corrosion resistance, it was necessary to repeatedly apply the coating to increase the thickness of the coating, and the coating took a long time. Further, in the liquid paint, pinholes are easily formed in the coating film due to a solvent or the like in the paint, and when the pinholes are formed, corrosion is easily generated therefrom. Further, the liquid paints of acrylic resins and urethane resins generally used were inferior in weather resistance and stain resistance.
【0004】また粉末塗料を粉体塗装する後者の方法に
あっては、粉体塗料を使用しているので、1回の塗装で
金属体に形成される塗膜の厚みが厚く、液状塗料の如く
何度も重ね塗りをする必要がないため塗装時間が短縮さ
れる。また塗料中に溶剤等を使用していないので、ピン
ホール等が発生せず耐食性にも優れていた。しかし該粉
体塗装による塗膜は、恰かも波打ったような外観を呈す
る如く表面の平滑性に劣り、また耐候性や耐汚染性につ
いても満足すべきものではなかった。In the latter method of powder coating a powder coating, since the powder coating is used, the thickness of the coating film formed on the metal body by one coating is large, and the coating of the liquid coating is difficult. The coating time is shortened because it is not necessary to repeatedly apply as many times. Further, since no solvent or the like was used in the paint, no pinholes or the like were generated and the corrosion resistance was excellent. However, the coating film formed by the powder coating had poor surface smoothness as if it had a wavy appearance, and was not satisfactory in terms of weather resistance and stain resistance.
【0005】本発明は、従来の塗装金属体の製造方法が
有していた上記の問題点を解消し、耐食性及び耐候性、
耐汚染性に優れた塗装金属体およびその製造方法を提供
せんとするものである。[0005] The present invention solves the above-mentioned problems of the conventional method of manufacturing a coated metal body, and provides corrosion resistance and weather resistance,
An object of the present invention is to provide a coated metal body having excellent stain resistance and a method for producing the same.
【0006】[0006]
【課題を解決するための手段】上記目的を達成するため
に、本発明は次のような構成としている。すなわち、こ
の発明に係る塗装金属体は、金属体に粉体塗料による樹
脂塗膜が形成され、該樹脂塗膜上にシリコーン化合物を
主成分とし、これに着色顔料又は金属超微粒子を含有す
る被覆層が形成されてなることを特徴とするものであ
り、またこの発明に係る塗装金属体の製造方法は、金属
体に粉体塗装による樹脂塗膜を通常の焼付条件より若干
低く焼付けて形成し、該樹脂塗膜上にシリコーン化合物
を主成分とする被覆層を樹脂塗膜の焼付温度と同等乃至
高い温度条件下にて焼付け形成してなることを特徴とし
ている。In order to achieve the above object, the present invention has the following arrangement. That is, in the coated metal body according to the present invention, a resin coating film of a powder coating is formed on the metal body, and a silicone compound is used as a main component on the resin coating film , which contains a coloring pigment or ultrafine metal particles . The method of manufacturing a coated metal body according to the present invention is characterized in that a resin coating film by powder coating is applied to the metal body under normal baking conditions. Slightly
Formed by baking low , and forming a coating layer containing a silicone compound as a main component on the resin coating film at a temperature equal to or higher than the baking temperature of the resin coating film.
It is characterized by being formed by baking under high temperature conditions .
【0007】以下に本発明の構成を、更に詳細に説明す
る。Hereinafter, the configuration of the present invention will be described in more detail.
【0008】本発明に使用される金属体としては、一般
に鋼、アルミニウム、銅、亜鉛、その他の金属やそれら
の合金等が適宜使用されるが、耐食性に優れたステンレ
ス鋼、亜鉛メッキ鋼、アルミニウム等が特に好適に使用
される。また金属体の形状は平板状、曲面板状、波板状
又は角柱や円柱のような柱状等、どの様な形状であって
もよく、また柱状のものにあっては、管状、棒状その他
いかなる異形断面であってもよい。As the metal body used in the present invention, generally, steel, aluminum, copper, zinc, other metals and alloys thereof are suitably used, and stainless steel, galvanized steel, and aluminum having excellent corrosion resistance are used. Etc. are particularly preferably used. Also, the shape of the metal body may be any shape such as a flat plate, a curved plate, a corrugated plate, or a column such as a prism or a cylinder. It may have an irregular cross section.
【0009】なお前記金属体の表面は、塗料との付着性
を向上させるために、予め脱脂処理をおこなってよごれ
や油分を除いたり、脱脂処理と共に該表面をサンドブラ
スト等により粗面化したり、化成処理によるリン酸塩等
のリン酸塩皮膜が形成されていてもよいし、さらに公知
のプライマー層が形成されていてもよい。The surface of the metal body is subjected to a degreasing process in advance to remove dirt and oil in order to improve the adhesion to the paint, and the surface is roughened by sand blasting or the like together with the degreasing process, A phosphate film such as a phosphate film may be formed by the treatment, or a known primer layer may be further formed.
【0010】前記金属体に樹脂塗膜を形成する粉体塗装
とは、合成樹脂からなる粉体塗料を金属体の表面で加熱
溶融させて樹脂塗膜を形成する塗装方法であって、流動
浸漬、溶射、静電塗装等の適宜塗装方法が使用される。
該粉体塗料としては特に限定されないが、一般にはエ
ポキシ樹脂、アクリル樹脂、ポリエステル等の粉体塗料
が好適に使用される。なお樹脂塗膜の焼付条件は使用さ
れる樹脂の種類や厚みによって異なるが、一般には樹脂
塗膜上にシリコーン化合物を主成分とする被覆層を形成
する際に再度加熱されるため、オーバーベークにならな
いように、通常の焼付温度より若干低い150〜170
℃程度、加熱時間10〜30分とされる。[0010] The powder coating for forming a resin coating on the metal body is a coating method for forming a resin coating by heating and melting a powder coating made of a synthetic resin on the surface of the metal body. An appropriate coating method such as thermal spraying, electrostatic coating or the like is used.
The powder coating is not particularly limited, but generally a powder coating of an epoxy resin, an acrylic resin, polyester, or the like is suitably used. The baking conditions for the resin coating vary depending on the type and thickness of the resin used.Generally, the resin coating is heated again when forming a coating layer mainly composed of a silicone compound on the resin coating. 150-170 which is slightly lower than the normal baking temperature
C. and a heating time of 10 to 30 minutes.
【0011】また形成される樹脂塗膜の厚みは特に限定
されるものではないが、一般には20〜200μmの厚
みが好適とされる。すなわち該厚みは1回の静電粉体塗
装等により得ることができる厚みの範囲内であり、且つ
20μm以下では樹脂の隠蔽力が劣り、200μm以上
になると樹脂が静電反発を起こして表面の凹凸が顕著に
現れる等の理由からである。しかし塗装を2回以上する
ことにより、表面の凹凸の発生をおさえながらさらに樹
脂塗膜の厚みを増大させてもよい。The thickness of the formed resin coating film is not particularly limited, but is generally preferably 20 to 200 μm. That is, the thickness is within the range of a thickness that can be obtained by a single electrostatic powder coating or the like, and when the thickness is 20 μm or less, the concealing power of the resin is inferior. This is because unevenness appears remarkably. However, the thickness of the resin coating film may be further increased by suppressing the occurrence of surface irregularities by performing the coating twice or more.
【0012】前記樹脂塗膜上に形成される被覆層はシリ
コーン化合物を主成分とするものであって、シリコーン
化合物を主成分とする塗料を塗布することによって形成
されるものである。該シリコーン化合物としては、一般
にはシリコーン樹脂等のシロキサン結合を主鎖とする有
機けい素化合物単体もしくは有機けい素化合物とアルキ
ッド、エポキシ、アクリル、ポリエステル、フェノー
ル、メラミン、ウレタン等の変性有機物との反応によっ
て得られるシリコーン変性ゾルの如きものが好適に使用
され、該塗料は焼付け型であって、加熱硬化することに
より硬化時間を短縮できるものが使用され、好適にはエ
ポキシ変性シリコーンゾル、ポリエステル変性シリコー
ンゾル、またはアクリル変性シリコーンゾルが用いられ
る。また上記変性有機物の含有率は有機けい素重合物に
較べて少ない方が耐候性、付着性に優れ、燃焼時におけ
るガス発生量も少なくなるので好ましい。なお該シリコ
ーン化合物を主成分とする塗料は樹脂塗膜の経年劣化を
防止するため着色されていることが必要である。The coating layer formed on the resin coating film has a silicone compound as a main component, and is formed by applying a paint containing a silicone compound as a main component. As the silicone compound, generally an organic silicon compound as a main chain a white hexane bond such as silicone resins are alone or organosilicon compound and an alkyd, epoxy, acrylic, polyester, phenolic, melamine, and modified organic material such as urethane are such ones preferably used in the silicone-modified sol obtained by the reaction, the paint is a shrink with type, it is used as it can shorten the curing time by heat curing, preferably epoxy-modified silicone sol, polyester A modified silicone sol or an acrylic-modified silicone sol is used. It is also preferable that the content of the modified organic substance is lower than that of the organic silicon polymer, because it is excellent in weather resistance and adhesion and the amount of gas generated during combustion is reduced. In addition, the paint containing the silicone compound as a main component may deteriorate the resin film over time.
It is necessary Rukoto be colored to prevent.
【0013】樹脂塗膜上に前記シリコーン化合物を主成
分とする被覆層を形成するには、該シリコーン化合物に
適宜顔料、沈降防止剤、紫外線吸収剤や金属超微粒子
(酸化亜鉛、酸化チタン、酸化鉄等)等の改質剤および
溶剤等を混入して塗料とし、該塗料を樹脂塗膜上に塗装
して硬化させればよい。焼付条件は一般には焼付温度1
60〜200℃、加熱時間15〜30分とされる。また
形成される被覆層の厚みは特に限定されるものではない
が、一般には5〜50μm程度とされる。なお該塗料を
樹脂塗膜上に塗装するには、スブレー塗り、刷毛塗り、
ローラー塗り等の公知方法が適用される。なお樹脂塗膜
と被覆層の間に接着剤の如きものが介在されていてもよ
い。In order to form a coating layer containing the above-mentioned silicone compound as a main component on a resin coating film, a pigment, an anti-settling agent, an ultraviolet absorber and ultrafine metal particles (zinc oxide, titanium oxide, A modifier such as iron) and a solvent may be mixed into a paint, and the paint may be applied on a resin coating film and cured . Baked with conditions it is generally baking temperature 1
60 to 200 ° C., Ru is the heating time 15 to 30 minutes. The thickness of the formed coating layer is not particularly limited, but is generally about 5 to 50 μm. In addition, in order to apply the paint on the resin coating, spray coating, brush coating,
A known method such as roller coating is applied. An adhesive such as an adhesive may be interposed between the resin coating film and the coating layer.
【0014】[0014]
【作用】本発明の塗装金属体およびその製造方法は、ま
ず金属体に粉体塗装により樹脂塗膜を形成することによ
り、1回の塗装で厚みの厚い樹脂塗膜を形成して塗装時
間を短縮すると共に、ピンホール等の発生をなくし、得
られる塗装金属体の耐食性を向上させている。また該樹
脂塗膜上にシリコーン化合物を主成分とする被覆層を形
成することにより、表面の平滑性を向上させると共に、
シリコーン化合物が有する優れたはっ水性、耐薬品性等
により耐食性、耐候性および耐汚染性を向上させてい
る。とくに本発明の塗装金属体に於ては、被覆層として
シリコーン化合物に着色顔料又は金属超微粒子が含有さ
れているので、該被覆層を透過する光を極力低減するこ
とによって下層にある樹脂塗膜の経年劣化を防止するこ
とが可能であって、樹脂塗膜の経年劣化に起因する被覆
層との層間剥離を長期に亘り防止することができる。又
その製造方法に於ては、樹脂塗膜の焼付条件をオーバー
ベークにならないよう通常の粉体塗料の焼付条件より1
50〜170℃と低くしたので、樹脂塗膜には反応基
(官能基)を残すことゝなり更に上層である被覆層を1
60〜200℃にて焼付けるので樹脂塗膜は再度焼付け
られるか或いはやゝ高目の温度条件で焼付けられ未反応
基が被覆層の焼付時に硬化反応することにより、上下両
層の強固な密着力が得られることゝなる。 The coated metal body and the method of manufacturing the same according to the present invention first form a resin coating by powder coating on the metal body, thereby forming a thick resin coating in a single coating to reduce the coating time. In addition to shortening, the occurrence of pinholes and the like is eliminated, and the corrosion resistance of the resulting coated metal body is improved. In addition, by forming a coating layer containing a silicone compound as a main component on the resin coating film, the surface smoothness is improved,
Corrosion resistance, weather resistance and stain resistance are improved by the excellent water repellency, chemical resistance and the like of the silicone compound. In particular, in the coated metal body of the present invention,
Silicone compounds contain color pigments or ultrafine metal particles
Light transmitted through the coating layer is reduced as much as possible.
To prevent aging of the underlying resin coating.
Is possible, and coating due to aging of the resin coating
Delamination from the layer can be prevented for a long period of time. or
In the manufacturing method, the baking conditions of the resin coating film are exceeded.
It is 1 more than the baking condition of normal powder paint to avoid baking.
Since the temperature was reduced to 50-170 ° C, the reactive coating
(Functional group) is left.
Baking at 60-200 ° C, baking the resin coating again
Or baking at higher temperature conditions, unreacted
The base undergoes a curing reaction when the coating layer is baked, so that both upper and lower
Strong adhesion of the layer is obtained.
【0015】[0015]
【実施例】以下、本発明を実施例に基づき具体的に説明
する。なお図1は本発明塗装金属体の製造方法により得
られた塗装金属体の一実施例を示す断面説明図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on embodiments. FIG. 1 is an explanatory sectional view showing one embodiment of a coated metal body obtained by the method for producing a coated metal body of the present invention.
【0016】まず図1の如く、金属体1として溶融亜鉛
メッキ鋼板を使用し、該溶融亜鉛メッキ鋼板の表面を脱
脂・化成処理した後、ポリエステル粉体塗料を静電粉体
塗装し、170℃、20分間焼き付けて膜厚50μmの
樹脂塗膜2を形成した。次いで該樹脂塗膜2上に前記粉
体塗料と同着色のシリコーン変性ゾルを主成分とする液
状塗料(固形分20%)をスプレー塗装し、170℃、
20分間焼き付けて膜厚10μmの被覆層3を形成し、
本発明実施例1による塗装金属体を得た。First, as shown in FIG. 1, a hot-dip galvanized steel sheet is used as a metal body 1, the surface of the hot-dip galvanized steel sheet is subjected to degreasing and chemical conversion treatment, and then a polyester powder paint is electrostatically powder-coated, and a temperature of 170 ° C. And baked for 20 minutes to form a resin coating film 2 having a thickness of 50 μm. Next, a liquid paint (solid content: 20%) containing a silicone-modified sol of the same color as the powder paint as a main component is spray-coated on the resin coating film 2,
Baking for 20 minutes to form a coating layer 3 having a thickness of 10 μm,
A coated metal body according to Example 1 of the present invention was obtained.
【0017】また金属体1としてステンレス鋼板(SU
S304)を使用し、該ステンレス鋼板の表面を脱脂・
水洗した後、エポキシ粉体塗料を静電粉体塗装し、17
0℃、20分間焼き付けて膜厚70μmの樹脂塗膜2を
形成した。次いで該樹脂塗膜2上に紫外線吸収剤と金属
超微粒子(酸化亜鉛、酸化チタン、酸化鉄等)を含みシ
リコーン変性ゾルを主成分とする透明の液状塗料(固形
分30%)をスプレー塗装し、180℃、20分間焼き
付けて膜厚19μmの被覆層3を形成し、本発明実施例
2による塗装金属体を得た。As the metal body 1, a stainless steel plate (SU)
S304) to degrease the surface of the stainless steel plate.
After washing with water, epoxy powder coating is applied with electrostatic powder coating, and
By baking at 0 ° C. for 20 minutes, a resin coating film 2 having a thickness of 70 μm was formed. Next, a transparent liquid paint (solid content: 30%) containing an ultraviolet absorbent and ultrafine metal particles (zinc oxide, titanium oxide, iron oxide, etc.) and containing a silicone-modified sol as a main component is spray-coated on the resin coating film 2. The coating was baked at 180 ° C. for 20 minutes to form a coating layer 3 having a thickness of 19 μm, thereby obtaining a coated metal body according to Example 2 of the present invention.
【0018】さらに金属体1としてアルミニウム板を使
用し、該アルミニウム板の表面を脱脂・水洗した後、ポ
リエステル粉体塗料を静電粉体塗装し、160℃、20
分間焼き付けて膜厚100μmの樹脂塗膜2を形成し
た。次いで該樹脂塗膜2上にシリコーン変性ゾルを主成
分とする茶色の液状塗料(固形分20%)をスプレー塗
装し、160℃、20分間焼き付けて膜厚15μmの被
覆層3を形成し、本発明実施例3による塗装金属体を得
た。Further, an aluminum plate was used as the metal body 1, the surface of the aluminum plate was degreased and washed with water, and then a polyester powder coating was electrostatically coated with a powder of 160 ° C and 20 ° C.
After baking for a minute, a resin coating film 2 having a thickness of 100 μm was formed. Next, a brown liquid paint (solid content: 20%) containing silicone-modified sol as a main component is spray-coated on the resin coating film 2 and baked at 160 ° C. for 20 minutes to form a coating layer 3 having a thickness of 15 μm. A coated metal body according to Inventive Example 3 was obtained.
【0019】次に比較例1として、溶融亜鉛メッキ鋼板
の表面を脱脂・化成処理した後、ポリエステル粉体塗料
を静電粉体塗装し、190℃、20分間焼き付けて膜厚
50μmの樹脂塗膜が形成された塗装金属体を得た。Next, as Comparative Example 1, after the surface of a hot-dip galvanized steel sheet was degreased and chemically treated, a polyester powder coating was electrostatically coated and baked at 190 ° C. for 20 minutes to form a resin coating having a thickness of 50 μm. Was obtained.
【0020】また比較例2として、ステンレス鋼板(S
US304)の表面を脱脂・水洗した後、エポキシ粉体
塗料を静電粉体塗装し、180℃、20分間焼き付けて
膜厚70μmの樹脂塗膜が形成された塗装金属体を得
た。As Comparative Example 2, a stainless steel plate (S
After the surface of US304) was degreased and washed with water, an epoxy powder coating was applied by electrostatic powder coating and baked at 180 ° C. for 20 minutes to obtain a coated metal body having a resin coating film having a thickness of 70 μm.
【0021】次に上記実施例1〜3と比較例1及び2に
よる塗装金属体について、耐食性を調べるために塩水噴
霧試験、耐候性を調べるためにサンシャインウエザオメ
ーター試験、耐汚染性試験及び表面の平滑性を調べ、そ
の結果を表1に示した。Next, with respect to the coated metal bodies according to Examples 1 to 3 and Comparative Examples 1 and 2, a salt spray test was conducted to examine corrosion resistance, a sunshine weatherometer test, a stain resistance test, and a surface test were conducted to examine weather resistance. Was examined for smoothness, and the results are shown in Table 1.
【0022】[0022]
【表1】 [Table 1]
【0023】塩水噴霧試験は、JIS−K−5400に
規定された方法により、鋭利な刃物で試験片の樹脂塗膜
を貫通して金属体の表面まで達する切り傷により交差す
る二本の対角線を描き、該試験片を塩水の霧が発生する
試験室の内に1000時間入れて、樹脂塗膜及び被覆層
にできるふくれの大きさを調べ、樹脂塗膜と金属体の密
着性を評価する塩水噴霧試験であって、表1での◎は
錆、ふくれの発生が認められなかったことを示してい
る。The salt spray test conforms to JIS-K-5400
According to the prescribed method, two diagonal lines intersecting with each other by a cut that penetrates the resin coating of the test piece with a sharp blade and reaches the surface of the metal body, and draws the test piece in a test chamber where salt water mist is generated. In a water spray test to evaluate the adhesion between the resin coating and the metal body by examining the size of the blisters formed in the resin coating and the coating layer for 1000 hours. No outbreak was observed.
【0024】サンシャインウエザオメーター試験は、J
IS−K−5400に規定された方法により、1000
時間照射後の表面の劣化状態を観察し、表1では◎は劣
化が認められず、×は劣化してチョーキングが発生して
いることを示している。The sunshine weatherometer test is described in J.
According to the method specified in IS-K-5400, 1000
Observation of the state of deterioration of the surface after irradiation for a period of time shows that in Table 1, 劣化 indicates that no deterioration was observed, and X indicates that deterioration and choking occurred.
【0025】耐汚染性試験は、JIS−K−5400に
規定された方法により、試験片の塗面に油性のマーキン
グペンで汚染し、規定した時間放置後にふきとり、塗面
の汚染程度を目視によって調べ、◎は汚染が消え、×は
汚染が消えずに残っていることを示している。また表面
の平滑性については、目視によって調べ、◎は表面が平
滑であり、×は表面が波打っていることを示している。The stain resistance test conforms to JIS-K-5400.
Using the specified method , stain the painted surface of the test piece with an oil-based marking pen, wipe it off after leaving it for the specified time, visually check the degree of contamination on the painted surface, ◎ indicates that the stain has disappeared, and × indicates that the stain has not disappeared. It shows that it remains. The surface smoothness was visually inspected. A indicates that the surface was smooth, and X indicates that the surface was wavy.
【0026】以上表1の示す通り、比較例1及び2に較
べ本発明実施例1〜3による塗装金属体は耐食性、耐候
性、耐汚染性に優れていることが判った。As shown in Table 1, the coated metal bodies according to Examples 1 to 3 of the present invention were found to be superior in corrosion resistance, weather resistance and stain resistance as compared with Comparative Examples 1 and 2.
【0027】次に、表2に示された、金属体、樹脂塗
膜、被覆層の組み合わせ、および膜厚、塗膜色、製造条
件にて本発明実施例4〜10による塗装金属体を作成
し、それら実施例4〜10について、前記と同様の条件
にて、耐食性を調べるための塩水噴霧試験、耐候性を調
べるためのサンシャインウエザオメーター試験、耐汚染
性試験及び表面の平滑性をそれぞれ調べ、その結果を表
3に示した。 Next, the metal body and resin coating shown in Table 2 were applied.
Combination of film and coating layer, film thickness, coating color, manufacturing conditions
In this case, a painted metal body according to Examples 4 to 10 of the present invention was prepared.
Then, for Examples 4 to 10, the same conditions as described above were used.
The salt spray test to check corrosion resistance and weather resistance
Sunshine weatherometer test, contamination resistance
And the surface smoothness were examined.
3 is shown.
【0028】[0028]
【表2】 [Table 2]
【0029】[0029]
【表3】 [Table 3]
【0030】表3からも明らかなように、金属体がステ
ンレス鋼、亜鉛メッキ鋼、またはアルミニウムからな
り、また樹脂塗膜が、エポキシ粉体塗料、アクリル粉体
塗料、またはポリエステル粉体塗料からなり、さらに被
覆層が、エポキシ変性シリコーンゾル、ポリエステル変
性シリコーンゾル、またはアクリル変性シリコーンゾル
からなる本発明実施例4〜10による塗装金属体は、耐
食性、耐候性、耐汚染性に優れていることが判る。 As is clear from Table 3, the metal body is
Stainless steel, galvanized steel, or aluminum
Resin coatings, epoxy powder coatings, acrylic powders
Paint or polyester powder paint,
The covering layer is made of epoxy-modified silicone sol or polyester
Silicone sol or acrylic-modified silicone sol
The coated metal bodies according to Examples 4 to 10 of the present invention
It turns out that it is excellent in corrosion resistance, weather resistance, and stain resistance.
【0031】[0031]
【発明の効果】以上詳述したように本発明塗装金属体お
よびその製造方法は、金属体に粉体塗装により樹脂塗膜
を形成しているので、1回の塗装で厚みの厚い樹脂塗膜
が形成でき塗装時間を短縮することができると共に、形
成された樹脂塗膜は、従来の如き液状塗料からなる塗膜
に較べてピンホール等の発生がないので、得られる塗装
金属体は耐食性に極めて優れている。As described in detail above, the coated metal body of the present invention and
And a method of manufacturing the same, since a resin coating is formed on a metal body by powder coating, a single coating can form a thick resin coating, thereby shortening the coating time and forming the resin coating. Since the resin coating film does not have pinholes and the like as compared with a conventional coating film made of a liquid paint, the resulting coated metal body is extremely excellent in corrosion resistance.
【0032】また本発明塗装金属体およびその製造方法
は、前記樹脂塗膜上にシリコーン化合物を主成分とする
被覆層が形成されているので、従来の如き粉体塗装のみ
からなるものに較べて、表面の平滑性に優れると共に、
シリコーン化合物が有する優れたはっ水性、耐薬品性等
により優れた耐食性、耐候性および耐汚染性を有してい
る。一方、本発明塗装金属体に於ては、被覆層としてシ
リコーン化合物に着色顔料または金属超微粒子が含有さ
れているので、被覆層により樹脂塗膜の紫外線による経
年劣化が低減され、経年劣化に起因する両層の層間剥離
が長期に亘り防止される。 又、本発明製造方法に於て
は、樹脂塗膜の焼付条件をオーバーベークにならないよ
う150〜170℃と通常の焼付温度より若干低くした
ので、樹脂塗膜は半硬化状態となり未反応基が残ること
ゝなる。一方上層である被覆層は160〜200℃と再
度の加熱を受けるか或はやゝ高目の温度で焼付けられる
ので樹脂塗膜の未反応基が被覆層の焼付時に硬化反応す
ることゝなり、上下両層の強固な密着力が得られる。 Further, in the coated metal body of the present invention and the method for producing the same, since the coating layer containing a silicone compound as a main component is formed on the resin coating film, compared with the conventional one consisting only of powder coating. , With excellent surface smoothness,
It has excellent corrosion resistance, weather resistance and stain resistance due to the excellent water repellency and chemical resistance of the silicone compound. On the other hand, in the coated metal body of the present invention, the coating
Contains color pigments or ultrafine metal particles in the silicone compound
The resin coating is exposed to ultraviolet light by the coating layer.
Aging deterioration is reduced, delamination of both layers due to aging
Is prevented for a long time. In the production method of the present invention,
Will not overbake the baking conditions of the resin coating
150 to 170 ° C, slightly lower than normal baking temperature
Therefore, the resin coating will be in a semi-cured state and unreacted groups will remain
ゝOn the other hand, the upper coating layer has a temperature of 160 to 200 ° C.
Or heated at a higher temperature
As a result, unreacted groups in the resin coating undergo a curing reaction during baking of the coating layer
In other words, a strong adhesion between the upper and lower layers can be obtained.
【図1】本発明の塗装金属体の製造方法により得られる
塗装金属体の一実施例を示す断面説明図である。FIG. 1 is an explanatory sectional view showing one embodiment of a coated metal body obtained by a method for manufacturing a coated metal body of the present invention.
1 金属体 2 樹脂塗膜 3 被覆層 1 metal body 2 resin coating 3 coating layer
フロントページの続き (56)参考文献 特開 平4−318088(JP,A) 特開 昭63−143976(JP,A) 特開 平4−28540(JP,A) 特開 昭64−38178(JP,A) 「シリコーンハンドブック」日刊工業 新聞社,平成2年(1990)8月31日発 行,第13章 変性シリコーンレジン (P.492−514)Continuation of the front page (56) References JP-A-4-318088 (JP, A) JP-A-63-143976 (JP, A) JP-A-4-28540 (JP, A) JP-A 64-38178 (JP , A) "Silicone Handbook," Nikkan Kogyo Shimbun, August 31, 1990, Chapter 13, Modified Silicone Resin (P.492-514)
Claims (4)
が形成され、該樹脂塗膜上にエポキシ変性シリコーンゾ
ル、ポリエステル変性シリコーンゾルまたはアクリル変
性シリコーンゾルの一乃至複数のシリコーン化合物を主
成分とし、これに着色顔料又は金属超微粒子を含有する
被覆層が形成されてなる塗装金属体。A resin coating of a thermosetting powder coating is formed on a metal body, and one or more silicone compounds of an epoxy-modified silicone sol, a polyester-modified silicone sol or an acrylic-modified silicone sol are formed on the resin coating. A coated metal body having a coating layer containing a coloring pigment or ultrafine metal particles as a main component.
またはアルミニウムからなる請求項1記載の塗装金属
体。2. The metal body is made of stainless steel, galvanized steel,
2. The coated metal body according to claim 1, comprising aluminum.
粉体塗料またはポリエステル粉体塗料からなる請求項1
または2記載の塗装金属体。3. The resin coating film according to claim 1, wherein said resin coating film comprises an epoxy powder coating, an acrylic powder coating or a polyester powder coating.
Or the coated metal body according to 2.
の焼付温度より若干低い150〜170℃で焼付けて樹
脂塗膜を形成し、該樹脂塗膜上にエポキシ変性シリコー
ンゾル、ポリエステル変性シリコーンゾルまたはアクリ
ル変性シリコーンゾルの一乃至複数のシリコーン化合物
を主成分とし、これに着色顔料又は金属超微粒子を含有
する塗料を塗布して160〜200℃の粉体塗料の焼付
温度と同等以上の高い温度条件下にて、該樹脂塗膜を完
全に硬化させると共に樹脂塗膜に強固に密着した被覆層
を形成することを特徴とする塗装金属体の製造方法。4. A resin coating is formed by applying a thermosetting powder coating to a metal body and baking at 150 to 170 ° C. slightly lower than a normal baking temperature to form an epoxy-modified silicone sol on the resin coating. Equivalent to a baking temperature of 160 to 200 ° C by applying a coating containing a color pigment or ultrafine metal particles to one or more silicone compounds of a polyester-modified silicone sol or an acrylic-modified silicone sol as a main component. A method for producing a coated metal body, comprising completely curing the resin coating under the above high temperature conditions and forming a coating layer firmly adhered to the resin coating.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5047912A JP2883507B2 (en) | 1993-03-09 | 1993-03-09 | Painted metal body and method of manufacturing the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5047912A JP2883507B2 (en) | 1993-03-09 | 1993-03-09 | Painted metal body and method of manufacturing the same |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06254492A JPH06254492A (en) | 1994-09-13 |
JP2883507B2 true JP2883507B2 (en) | 1999-04-19 |
Family
ID=12788585
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5047912A Expired - Fee Related JP2883507B2 (en) | 1993-03-09 | 1993-03-09 | Painted metal body and method of manufacturing the same |
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JP (1) | JP2883507B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002011406A (en) * | 2000-06-29 | 2002-01-15 | Nishimura Coating:Kk | Coated material and coating method |
JP5294122B2 (en) * | 2009-05-21 | 2013-09-18 | 株式会社栗本鐵工所 | Tube painting method |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0613109B2 (en) * | 1986-12-05 | 1994-02-23 | ナショナル住宅産業株式会社 | Anticorrosion coating structure |
JPH04318088A (en) * | 1991-04-17 | 1992-11-09 | Kansai Paint Co Ltd | Finish-coating process |
-
1993
- 1993-03-09 JP JP5047912A patent/JP2883507B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
「シリコーンハンドブック」日刊工業新聞社,平成2年(1990)8月31日発行,第13章 変性シリコーンレジン(P.492−514) |
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JPH06254492A (en) | 1994-09-13 |
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