POLYOLEFIN COATED STEEL MATERIAL HAVING POWDER EPOXY PRIMER LAYER, AND POWDER EPOXY PRIMER USED THEREFOR

PROBLEM TO BE SOLVED: To provide a polyolefin coated steel material with high corrosion resistance which uses a powder epoxy primer, and to provide the epoxy primer which can be manufactured even at low temperature and has sufficient hot-cold cyclicity.SOLUTION: Low-temperature coating at up to 160°...

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Hauptverfasser:	KURIYAMA HIROSHI, YOSHIZAKI NOBUKI, FUNATSU SHINICHI, HIROMOTO KEIICHI
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES FILLING PASTES INKS LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS POLISHES TRANSPORTING USE OF MATERIALS AS ADHESIVES USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a polyolefin coated steel material with high corrosion resistance which uses a powder epoxy primer, and to provide the epoxy primer which can be manufactured even at low temperature and has sufficient hot-cold cyclicity.SOLUTION: Low-temperature coating at up to 160°C is achieved with a polyolefin coated steel material having a polyolefin adhesive layer 4 and a polyolefin layer 5 laminated in order on a steel material 1 having been subjected to ground processing after a primer layer 3 of 10-500 μm is formed with an epoxy resin, obtained by mixing a bisphenol A type epoxy resin and a bisphenol F type epoxy resin as a powder epoxy paint at 90/10 to 50/50 in weight proportion, as a composition by using the blend of a phenol-based curing agent, an imidazole-based and/or imidazoline-based curing accelerator, and a 20-100 parts by weight of an inorganic filler having a median size of 5-20 μm. Further, hot-cold stress peeling in outdoor use, which is a problem as thick-film coating increases in stress strain of coating, can be greatly suppressed.