JP2886557B2 - Pre-coated metal sheet - Google Patents
Pre-coated metal sheetInfo
- Publication number
- JP2886557B2 JP2886557B2 JP1183193A JP18319389A JP2886557B2 JP 2886557 B2 JP2886557 B2 JP 2886557B2 JP 1183193 A JP1183193 A JP 1183193A JP 18319389 A JP18319389 A JP 18319389A JP 2886557 B2 JP2886557 B2 JP 2886557B2
- Authority
- JP
- Japan
- Prior art keywords
- coating film
- coating
- resin
- acrylic
- metal sheet
- 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
- Laminated Bodies (AREA)
- Finishing Walls (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は主に外装材として用いられ、しかも一般的な
塗膜を有する金属板の塗膜上にフッソ樹脂塗膜を形成し
て耐候性、加工性（エンボス加工も含む）、耐汚染性、
および耐食性にすぐれたプレコート鋼板に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] The present invention is mainly used as an exterior material, and furthermore, a fluororesin coating film is formed on a coating film of a metal plate having a general coating film to provide weather resistance. , Workability (including embossing), stain resistance,
And a precoated steel sheet having excellent corrosion resistance.
プレコート鋼板としては２コート２ベークの板材、所
謂着色亜鉛鉄板が耐候性、加工性、コストの点で外装材
の素材として最適であった。As the precoated steel sheet, a two-coat two-bake plate material, a so-called colored zinc iron plate, was most suitable as a material for the exterior material in terms of weather resistance, workability, and cost.
しかしながら、外気環境の変化などから２コース２ベ
ークの着色亜鉛鉄板は、耐候性、耐食性、耐汚染性、お
よび耐薬品性の点において、より一層の高品質化の金属
薄板材が要請されていた。しかも、フッソ塗膜を有する
板材としては着色亜鉛鉄板をベースとした改善が望まれ
ていた。さらに、フッソ塗膜を形成するには、接着性等
の関係から高価で作業性に劣るエポキシ樹脂を介在させ
る必要があった。However, due to changes in the outside air environment and the like, a two-course, two-baked colored zinc-iron sheet requires a metal sheet material of higher quality in terms of weather resistance, corrosion resistance, stain resistance, and chemical resistance. . In addition, as a plate material having a fluorine coating film, improvement based on a colored zinc iron plate has been desired. Further, in order to form a fluorine coating film, it is necessary to interpose an epoxy resin which is expensive and inferior in workability due to adhesiveness and the like.
本発明はこのような要請に対処するため、金属板の
下、中塗り塗料としては高加工用ポリエステル樹脂を主
成分とする塗膜によって形成し、これに親和性、接着性
のあるエステル、エーテル基を有するアクリル変性フル
オロオレフィンビニールエーテル系樹脂を主成分とした
塗料により上塗り塗膜を形成し、着色亜鉛鉄板にさらに
耐食性、耐候性、耐汚染性、加工性を付加したフッソ樹
脂塗膜を有する安価な素材を提案するものである。In order to address such a demand, the present invention is formed by a coating film mainly composed of a high-processing polyester resin as an intermediate coating under a metal plate, and has an affinity, an adhesive ester, and an ether. Forming a top coat with a paint mainly composed of acrylic-modified fluoroolefin vinyl ether resin having a group, and having a fluorine resin coating with added corrosion resistance, weather resistance, stain resistance, and processability on the colored zinc iron plate It proposes cheap materials.
すなわち、本発明に係るプレコート金属板は金属基板
上に高加工用ポリエステル樹脂を主成分とする下、中塗
り塗料からなる塗膜を形成し、この塗膜上に上塗り塗
料、特にアクリル変性フルオロオレフィンビニールエー
テル系樹脂を主成分とする塗料によって塗膜を形成した
金属薄板材からなるものである。That is, the precoated metal sheet according to the present invention forms a coating film composed of an intermediate coating under a high processing polyester resin as a main component on a metal substrate, and a top coating, particularly an acrylic-modified fluoroolefin, is formed on the coating. It is made of a sheet metal material having a coating film formed by a paint containing a vinyl ether resin as a main component.
さらに詳説すると、金属基板として亜鉛メッキ鋼板、
着色亜鉛メッキ鋼板（所謂、カラー鋼板）、アルミニウ
ム板、ステンレス板などの１種からなり、特に、鋼板に
おいては周知処理によって仮成処理被膜を施した素材も
含むものである。また、下、中塗り塗膜としては主成分
としてポリエステル樹脂、特に、高加工用ポリエステル
樹脂を用い、加工性と接着性、および上塗り塗料とのヌ
レをよくするのに有効である。勿論、この主成分に着色
顔料、防錆顔料、体質顔料などを添加した塗料も含むも
のである。上塗り塗膜としては、アクリル変性フルオロ
オレフィンビニールエーテル系樹脂を主成分とし、これ
に前記したような添加物を配合し、所要の着色、透明塗
料等を原料とする。なお、上塗り塗料は熱可塑性より、
熱硬化性が耐候性、接着性においてすぐれ、上記主成分
も熱硬化性であり、かつフッ素分としてはアクリル変性
フルオロオレフィンビニールエーテル系樹脂換算で40〜
80重量％位であり、後はアクリル樹脂、その他の成分を
含有する塗料である。To explain in more detail, galvanized steel sheet as a metal substrate,
It is composed of one type such as a colored galvanized steel plate (so-called color steel plate), an aluminum plate, a stainless steel plate and the like. In particular, the steel plate includes a material provided with a temporary coating film by a well-known process. In addition, a polyester resin, particularly a polyester resin for high processing, is used as a main component for the lower and intermediate coating films, and is effective in improving workability and adhesiveness, and improving wettability with the top coating. Needless to say, a paint containing a coloring pigment, a rust preventive pigment, an extender pigment or the like added to the main component is also included. As the top coat, an acrylic-modified fluoroolefin vinyl ether-based resin is used as a main component, and the above-mentioned additives are added thereto, and a desired coloring, transparent paint or the like is used as a raw material. In addition, the top coat paint is from thermoplasticity,
The thermosetting property is excellent in weather resistance and adhesiveness, the main component is also thermosetting, and the fluorine content is 40 to 40 in terms of acrylic-modified fluoroolefin vinyl ether resin.
It is about 80% by weight, and the rest is a paint containing acrylic resin and other components.
実施例１ まず、金属基材としては亜鉛メッキ鋼板（板厚が0.35
mm）の表面に高加工用ポリエステル樹脂（下塗り塗膜）
を形成する塗料をフロコータ、ロールコータ等で塗布
し、180℃で60秒間焼付し、塗膜厚さが５μの下塗り塗
膜を形成した。次に同じ塗料を中塗りとして塗布し、18
0℃で60秒間焼付して５μの中塗り塗膜を有するカラー
鋼板を製造した。Example 1 First, a galvanized steel sheet (having a thickness of 0.35
mm) Polyester resin for high processing (undercoat film)
Was applied with a flow coater, a roll coater, or the like, and baked at 180 ° C. for 60 seconds to form an undercoat film having a thickness of 5 μm. Next, apply the same paint as the middle coat,
Baking was performed at 0 ° C. for 60 seconds to produce a color steel sheet having a 5 μm intermediate coating film.
次に、このカラー鋼板の表面にアクリル変性フルオロ
オレフィンビニールエーテル系樹脂を主成分とする上塗
り塗料をロールコータ、またはカーテンフロコータで約
35μを塗布し、その後、230℃で60秒焼付して所期のプ
レコート金属板を製造した。なお、フッ素分は60重量
％、顔料０重量％とした。また、実施例２としてはJIS
−G3312（着色亜鉛鉄板）の化粧面、特に上塗り塗料と
してポリエステル樹脂を主成分とする塗膜を有する板厚
0.35mmの化粧面にフッソ塗膜層（所謂、本発明での上塗
り塗膜）としてアクリル変性フルオロオレフィンビニー
ルエーテル系樹脂を40μ（ウエット）で塗布し、次に24
0℃で60秒焼付してプレコート金属板を製造した。Next, the surface of this color steel sheet is coated with a top coat mainly composed of an acrylic-modified fluoroolefin vinyl ether resin using a roll coater or a curtain flow coater.
35 μm was applied and then baked at 230 ° C. for 60 seconds to produce the desired precoated metal sheet. The fluorine content was 60% by weight and the pigment was 0% by weight. In addition, as the second embodiment, JIS
-Thickness of G3312 (colored zinc-iron plate) with a decorative surface, especially with a coating mainly composed of polyester resin as a top coating.
An acrylic-modified fluoroolefin vinyl ether-based resin is applied on a 0.35 mm decorative surface as a fluorine coating film layer (so-called top coating film of the present invention) with a thickness of 40 μ (wet).
Baking was performed at 0 ° C. for 60 seconds to produce a precoated metal plate.
比較例１ これに対し、JIS−G3312の着色亜鉛鉄板、比較例２と
して実施例１の中塗り塗膜の上にポリビニルデンフルオ
ライド（商品名カイナー500）を10μ（ドライ）フッ素
分74重量％、顔料０重量％施したプレコート金属板を準
備した。Comparative Example 1 On the other hand, polyvinyl denfluoride (trade name: Kynar 500) was coated on the zinc-coated zinc sheet of JIS-G3312 and Comparative Example 2 as an intermediate coating film of Example 1 with 10 μ (dry) fluorine content of 74% by weight. And a precoated metal plate coated with 0% by weight of a pigment.
そこで、実施例１、２、比較例１、２の性能試験を下
記の項目に対して行った。その結果を下記表１に示す。Therefore, performance tests of Examples 1 and 2 and Comparative Examples 1 and 2 were performed for the following items. The results are shown in Table 1 below.
耐食性：塩水噴霧試験（JIS−Z2371）1500時間後の0T
曲げ部の白錆発生状況を観察した。白錆判定は５点法で
５点は白錆なし、１点は白錆著しいものとする。Corrosion resistance: 0T after 1500 hours of salt spray test (JIS-Z2371)
The occurrence of white rust at the bent portion was observed. The white rust was determined by the five-point method, with five points having no white rust and one point having significant white rust.
加工性：エンボス加工（深さ0.8mm）、模様はスタッ
コ柄とし、この際の塗膜状況を観察した。剥離なし５、
剥離大を１、 塗膜硬度:JIS−G3312に準じて塗膜に疵のつかない最
高鉄筆硬度で示した。Workability: Embossing (depth: 0.8 mm), the pattern was stucco pattern, and the state of the coating film at this time was observed. No peeling 5,
The peeling size was 1, and the coating film hardness was indicated by the maximum iron brush hardness at which the coating film was not damaged according to JIS-G3312.
耐候性（サンシャインウェザーメータ促進試験）1500
時間後の塗膜面の光沢残有率（％）GRで示した。Weather resistance (sunshine weather meter accelerated test) 1500
The gloss retention rate (%) GR of the coating film surface after time was indicated by GR.
中塗り塗料との接着性:3000時間クロスカット部（塗
膜全体にカッターで基板に達する疵を×印に入れたも
の）のブリスター発生状況少ない１点、著しく多い５点
とする。Adhesion with intermediate coating: 3000 points for the cross-cut portion (a mark reaching the substrate with a cutter over the entire coating film is marked with a cross).
〔発明の効果〕 上述したように本発明に係るプレコート金属板によれ
ば、下、中塗り塗膜を高加工用ポリエステル樹脂を主成
分とする塗膜で形成し、これと「ヌレ」、接着性のよい
アクリル変性フルオロオレフィンビニールエーテル系樹
脂を主成分とするフッ素塗膜を形成したため、上塗りと
中塗り塗膜の密着性がよく、耐候性、耐食性にすぐれた
特徴がある。また、上塗り塗膜におけるフッ素含有量が
従前より少ないため色差、光沢残存率（GR）がすぐれて
いる特徴がある。さらに、着色金属板に対して本発明で
用いる前記上塗り塗料を塗布することがフッ素成分が少
なく、アクリル樹脂分等が多いため極めて容易であり、
コストダウン、作業性の改善が図れる特徴がある。 [Effects of the Invention] As described above, according to the pre-coated metal sheet according to the present invention, the lower and intermediate coating films are formed of a coating film containing a polyester resin for high processing as a main component, and are squeezed and adhered. Since the fluorine-based coating mainly composed of an acrylic-modified fluoroolefin vinyl ether-based resin having good properties is formed, the adhesion between the topcoat and the intermediate coating is good, and the coating is excellent in weather resistance and corrosion resistance. Further, since the fluorine content in the overcoat film is smaller than before, the color difference and the gloss retention (GR) are excellent. Furthermore, it is extremely easy to apply the top coat used in the present invention to the colored metal plate because the fluorine component is small and the acrylic resin content is large.
There are features that can reduce costs and improve workability.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) E04F 13/12 B32B 15/08 B05D 7/14 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) E04F 13/12 B32B 15/08 B05D 7/14
Claims (1)
脂を主成分とする塗料によって形成され、上塗り塗膜が
アクリル変性フルオロオレフィンビニールエーテル系樹
脂を主成分とする塗料によって形成されていることを特
徴とするプレコート金属板。The lower coating film is formed of a paint mainly composed of a polyester resin for high processing, and the upper coating film is formed of a paint mainly composed of an acrylic-modified fluoroolefin vinyl ether-based resin. A precoated metal plate, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1183193A JP2886557B2 (en) | 1989-07-15 | 1989-07-15 | Pre-coated metal sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1183193A JP2886557B2 (en) | 1989-07-15 | 1989-07-15 | Pre-coated metal sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0351467A JPH0351467A (en) | 1991-03-05 |
| JP2886557B2 true JP2886557B2 (en) | 1999-04-26 |
Family
ID=16131403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1183193A Expired - Fee Related JP2886557B2 (en) | 1989-07-15 | 1989-07-15 | Pre-coated metal sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2886557B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5783449A (en) * | 1980-11-13 | 1982-05-25 | Nippon Paint Co Ltd | Precoated metallic plate |
-
1989
- 1989-07-15 JP JP1183193A patent/JP2886557B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0351467A (en) | 1991-03-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |