| 摘要 |
This invention relates to an apparatus for changing color utilizing new materials, the color of which changes, disappears or appears at the stimulation by, for example, light, heat, ions, electricity, pressure or radioactive rays. The materials are new styryl-like compounds having the below mentioned chemical formula: <IMAGE> (1) Wherein Q represents a benzene ring with or without substituted radicals and/or condensed ring(s); R1 and R2 represent lower alkyl radicals, hydroxyalkyl radicals or alkoxyalkyl radicals of the same or different kinds,; R3 represents hydrogen, an alkyl radical, alkoxy radical, halogen, nitrile radical, aromatic radical or phenoxy radical; Y represents oxygen (O) or sulphur (S); Z represents an alkylene radical of 2 to 4 carbon atoms with or without alkyl substitution radical(s) necessary to form a ring structure together with <IMAGE> A represents a condensation reaction residue of an aromatic aldehyde, heterocyclic aldehyde, aromatic nitroso compound, or heterocyclic nitroso compound.
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