NAPHTHALOCYANINE AND PHTHALOCYANINE PARTICLES

• Main Authors: SEEGER, Oliver, LEYBACH, Holger, DORMANN, Korinna, REICHELT, Helmut, REICHERT, Hans
• Format: Patent
• Language: English; French; German
• Published: 03.05.2023
• Subjects: ADHESIVES; BOOK COVERS; BOOKBINDING; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COLOUR PRINTING; CORRECTING FLUIDS; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR; DYES; FILES; FILLING PASTES; INKS; LAKES; LINING MACHINES; LOOSE LEAVES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MORDANTS; MOVABLE-STRIP WRITING OR READING APPARATUS; NATURAL RESINS; ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR; PRINTING; PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; SPECIAL PRINTED MATTER; STAMPS; TRANSPORTING; TYPEWRITERS; USE OF MATERIALS THEREFOR; WOODSTAINS

The present invention relates to particles of naphthalocyanine and phthalocyanine chromophores of formula (I) having a number average particle size in the range of from 10 nm to 80 nm with standard deviation being less than 40 nm, their use as almost colourless IR absorbers, for optical filter applications, especially for plasma display panels, or for laser welding of plastics. The compounds may be used in compositions for inks, paints and plastics, especially in a wide variety of printing systems and are particularly well-suited for security applications.