REVERSIBLE ORGANIC OPTICAL MEMORY MATERIAL AND ITS PRODUCTION

• Main Authors: TAMAOKI TAKASHI, ICHIMURA KUNIHIRO
• Format: Patent
• Language: English
• Published: 31.07.1986
• Subjects: ADHESIVES; AUXILIARY PROCESSES IN PHOTOGRAPHY; CHEMISTRY; CINEMATOGRAPHY; DYES; ELECTROGRAPHY; HOLOGRAPHY; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES; PHOTOGRAPHY; PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHYSICS; POLISHES

PURPOSE:To increase the optical response speed and to improve the repeating reproducibility and the shelf stability of a record by dispersing a clathrate compound consisting of a specified anthracene deriv. and gamma-cyclodextrin in a resin binder. CONSTITUTION:An anthracene deriv. represented by the formula (where R is a hydrophilic substituent) and gamma-cyclodextrin are dissolved in an aqueous medium to form a clathrate compound, and light is irradiated to dimerize the anthracene deriv. in the clathrate compound. A resin binder is dissolved in the soln. and formed into a film, and the dimer of the anthracene deriv. in the clathrate compound dispersed in the resin film is depolymerized by irradiating light on the resin film or heating the film. Thus,a reversible org. optical memory material showing photochromism by a reversible photodimerization reaction in the resin binder is obtd. The optical memory material has a satisfactory optical response property and superior reversibility in the writing of information and gives a record with superior shelf stability and processability. It is used as an optical information storing or recording material.