SURFACE-MODIFIED (EFFECT) PIGMENTS

• Main Authors: IWASA KAZUHISA, HAHN MARCEL, BUGNON PHILIPPE
• Format: Patent
• Language: English
• Published: 15.07.2010
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; DYES; FILLING PASTES; HUMAN NECESSITIES; HYGIENE; INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS; INKS; INORGANIC CHEMISTRY; LAKES; MEDICAL OR VETERINARY SCIENCE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MORDANTS; NATURAL RESINS; ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; 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 THEREFOR; WOODSTAINS

The invention relates to pigment based on (multiple) coated platelet-shaped substrates comprising an outer layer which is obtained by treatment with a metal oxide/hydroxide and then a phosphate ester, or phosphonate, or a salt thereof, with the proviso that the phosphate ester, or phosphonate do not contain fluorine, to a method for producing said pigments and the use thereof. The outer layer provides a very good photo-stabilisation of the TiO2coated platelet-shaped substrates, such as mica, combined with a good water resistance and an anti-yellowing performance.