URETHANE COATING COMPOSITION FOR METAL SUBSTRATE

To provide polyurethane coating compositions that can be applied directly to surfaces of metal substrates without a primer or pretreatment, and have good adhesion and optimal corrosion resistance, while maintaining color and gloss on prolonged exposure to sunlight.SOLUTION: A coating composition com...

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Bibliographische Detailangaben
Hauptverfasser:	DAN HARTINGER, DONALD W BOESPFLUG, TAPAN DEBROY
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES FILLING PASTES INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	To provide polyurethane coating compositions that can be applied directly to surfaces of metal substrates without a primer or pretreatment, and have good adhesion and optimal corrosion resistance, while maintaining color and gloss on prolonged exposure to sunlight.SOLUTION: A coating composition comprises a polyol that is a product of reaction between an epoxy novolac resin and a monocarboxylic acid, and also comprises an isocyanate-functional compound as a crosslinker. The coating composition forms a corrosion-resistant film when applied directly to a metal substrate surface without a pretreatment or primer.SELECTED DRAWING: None 【課題】下塗り剤又は前処理なしで金属基材の表面に直接施用可能であり、長時間日光に晒されても色彩及び光沢を維持しながら、優れた接着力及び最適な耐食性を有するポリウレタンコーティング用組成物の提供。【解決手段】エポキシノボラック樹脂と、モノカルボン酸との反応生成物であるポリオールを含み、架橋剤としてイソシアネート官能性化合物も含む。本コーティング用組成物は、前処理又は下塗剤なしで金属基材表面に直接適用されたときに、耐食フィルムを形成する。【選択図】なし