Thermochromic infrared dyes

The invention is in the field of intrinsically thermochromic material. We have found that infrared absorbing dyes of the azamethine type have intrinsically thermochromic properties. The use of said dyes as thermochromic material has the advantage that they can be thermally activated by infrared irra...

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Bibliographische Detailangaben
Hauptverfasser:	GRIFFITHS, JOHN, DE WIT, PAULUS P, BELLO, KASALI A, ERDHUISEN, ERWIN W. P
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMISTRY COLOUR PRINTING DYES INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER LAKES LINING MACHINES MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES PAINTS PERFORMING OPERATIONS PHYSICS POLISHES PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	The invention is in the field of intrinsically thermochromic material. We have found that infrared absorbing dyes of the azamethine type have intrinsically thermochromic properties. The use of said dyes as thermochromic material has the advantage that they can be thermally activated by infrared irradiation. Irradiation of such material with a laser causes a color change that can be used in imaging and optical data storage. The thermochromic dyes can be mixed with polymeric material and from the resulting polymer composition films can be made. If the dye contains polymerizable groups, it may be covalently incorporated into the polymer.