Composite powder and coloring composition containing the same, and their usage

• Main Authors: KIMURA, ASA, HINENO, TERUHIKO
• Format: Patent
• Language: English
• Published: 21.06.2004
• Edition: 7
• Subjects: 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; HUMAN NECESSITIES; HYGIENE; INKS; MEDICAL OR VETERINARY SCIENCE; 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; POLISHES; PREPARATION OF CARBON BLACK; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES; USE OF MATERIALS AS ADHESIVES; USE OF MATERIALS THEREFOR; WOODSTAINS

This invention is to provide a new composite powder in which defects known in conventional pigments having pearl luster have been dissolved and color due to interference color is visible, and to provide means for utilizing the powder in various fields. This composite powder is prepared by coating the surface of globular particles (e.g. silicon dioxide) as cores having a refractive index of 1.40-1.60 with a component (e.g. titanium dioxide) having a refractive index of 2.00-2.90 in a filmy state. The group of the composite powders subjected to size classification or a coloring composition containing the composite powder is applied on the surface to be coated and causes coloring due to optical interference caused in the composite powder layer formed on the coated surface.