WATER-BASED COATING COMPOSITION, METHOD OF FORMING MULTILAYERED COATING FILM, AND COATED PRODUCT

• Main Author: KOGA KAZUHI
• Format: Patent
• Language: English
• Published: 07.11.2007
• Subjects: ADHESIVES; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; 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; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF MATERIALS THEREFOR; WOODSTAINS

An aqueous coating composition is provided to realize excellent shelf stability, energy efficiency and workability, to form a multi-layer coating film having excellent appearance and water resistance. An aqueous coating composition is used as a second aqueous coating agent for forming a multi-layer coating film through a wet-on-wet coating process including coating a first aqueous coating agent, a second aqueous coating agent and a clear coating agent, successively. The aqueous coating composition comprises, based on 100 parts by weight of the resin (on the solid content basis): (a) 40-60 parts by weight of an emulsion resin obtained by emulsion-polymerizing a monomer mixture containing 0.5-10 parts by weight of a multifunctional vinyl monomer based on the weight of the total monomers, a carboxyl-containing vinyl monomer, a hydroxyl-containing vinyl monomer, and another polymerizable vinyl monomer; (b) 1-5 parts by weight of an amide group-containing water-soluble acrylic resin; (c) 5-20 parts by weight of an urethane emulsion; and (d) 15-35 parts by weight of a curing agent.