METALLIC COATING COMPOSITION

• Main Authors: TAKAMATSU TERUO, KATO HIROTADA
• Format: Patent
• Language: English
• Published: 08.06.1993
• Subjects: ADHESIVES; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; CHEMICAL PAINT OR INK REMOVERS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; CORRECTING FLUIDS; DIFFUSION TREATMENT OF METALLIC MATERIAL; DYES; FILLING PASTES; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SPRAYING OR ATOMISING IN GENERAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; USE OF MATERIALS THEREFOR; WOODSTAINS

PURPOSE:To obtain a metallic coating composition capable of providing coated products excellent in resistance to peeling from the cathode and water-resistant adhesion for a long period when used as a primer for a coating heavy-duty rust preventing urethane by adding strontium sulfate to an epoxy resin. CONSTITUTION:The objective metallic coating composition is obtained by adding (B) 50-200 pts.wt. powdery strontium sulfate (preferably anhydride) having preferably 0.1-20mum particle diameter to (A) 100 pts.wt. epoxy resin, preferably an isocyanate-cured epoxy resin prepared from preferably an epoxy-modified polyol and a polyisocyanate and, as necessary, adding a solvent, a curing catalyst, an antioxidant, a stabilizer, etc., thereto. The resultant metallic coating composition is used as a primer for coating a heavy-duty rust preventing urethane to coat a metal so as to provide 10-100mum dried film thickness. The formed coat is dried and then coated with the polyurethane heavy-duty rust preventing coating to afford coated products excellent in resistance to peeling from the cathode and water-resistant adhesion for a long period.