COATED METAL PLATE, SHUTTER SLAT AND SHUTTER

To provide a coated metal plate which can achieve moldability and scratch resistance, and can suppress lowering of scratch resistance and corrosion resistance for a long period of time.SOLUTION: A coated metal plate has a metal plate, a first surface layer coated film which is arranged on one surfac...

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Bibliographische Detailangaben
Hauptverfasser: SAKADO KENJI, OWA KATSUMI
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a coated metal plate which can achieve moldability and scratch resistance, and can suppress lowering of scratch resistance and corrosion resistance for a long period of time.SOLUTION: A coated metal plate has a metal plate, a first surface layer coated film which is arranged on one surface and is composed of a cured product of a first curable resin composition, and a second surface layer coated film which is arranged on the other surface and is composed of a cured product of a second curable resin composition. The first curable resin composition and the second curable resin composition each contain a curable polyester resin, a curing agent, 2-6 mass% of fluorine resin particles (to solid content), and 0.2-1.2 mass% of polyethylene particles A modified with a fluorine resin (to solid content). The curable polyester resin of the first curable resin composition has a weight average molecular weight higher than that of the curable polyester resin of the second curable resin composition. The first curable resin composition does not substantially contain polyethylene particles B that are not modified with the fluorine resin.SELECTED DRAWING: Figure 1 【課題】成形加工性と耐傷付き性とを高度に両立することができ、かつ長期間にわたり耐傷付き性および耐食性の低下を抑制できる塗装金属板を提供する。【解決手段】塗装金属板は、金属板と、その一方の面に配置された第1硬化性樹脂組成物の硬化物からなる第1表層塗膜と、他方の面に配置された第2硬化性樹脂組成物の硬化物からなる第2表層塗膜とを有する。第1硬化性樹脂組成物および第2硬化性樹脂組成物は、それぞれ、硬化性ポリエステル樹脂と、硬化剤と、(固形分に対して)2〜6質量%のフッ素樹脂粒子と、(固形分に対して)0.2〜1.2質量%のフッ素樹脂で変性されたポリエチレン粒子Aとを含む。第1硬化性樹脂組成物の硬化性ポリエステル樹脂は、第2硬化性樹脂組成物の硬化性ポリエステル樹脂よりも重量平均分子量が高い。また、第1硬化性樹脂組成物は、フッ素樹脂で変性されていないポリエチレン粒子Bを実質的に含まない。【選択図】図1