WATER-BASED COLOR COATING MATERIAL, AQUEOUS DISPERSION OF HYDROPHOBIC MELAMINE RESIN AND PROCESS FOR PRODUCING THE SAME, WATER-BASED COATING COMPOSITION, AND METHOD OF FORMING MULTILAYERED FILM

• Main Authors: YAMADA, SHINYA, FURUTA, SHINYA, HAYASHI, KOUKI, YONEDA, HIROTO, OHARA, KOUICHI, ANDO, HIROKI, ASAI, TOMOHITO
• Format: Patent
• Language: English; French; Japanese
• Published: 26.05.2006
• 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; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; 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

A process for producing an aqueous hydrophobic-melamine-resin dispersion which has excellent storage stability and can give a coating film excellent in adhesion and surface smoothness; and a water-based color coating material capable of giving a coating film excellent in coloration, adhesion in re-coating, chipping resistance, and wet adhesion. The water-based color coating material comprises a film-forming resin, a hardener, and a pigment, wherein the film-forming resin comprises an acrylic resin emulsion produced by emulsion polymerization having an acid value of 1-30 mg-KOH/g and a hydroxy value of 10-150 and the hardener comprises an aqueous dispersion of a hydrophobic melamine resin having a particle diameter of 20-140 nm. L'invention concerne un procédé de production de dispersion de résine de mélamine hydrophobe aqueuse à excellente capacité de stockage et pouvant donner un film de revêtement à excellent pouvoir adhésif et excellente texture de surface lisse. On décrit aussi un matériau de revêtement en couleur à base d'eau capable de donner un film de revêtement à excellentes propriétés de coloration, d'adhésion de deuxième revêtement, de résistance à l'écaillage et d'adhésion humide. Ledit matériau comprend une résine filmogène, un durcisseur et un pigment. La résine comprend une émulsion de résine acrylique produite par polymérisation d'émulsion, à valeur acide de 1-30 mg-KOH/g et valeur hydroxy de 10-150, et le durcisseur comprend une dispersion aqueuse de résine de mélamine hydrophobe dont les particules ont un diamètre de 20-140 nm.