Reversible Thermochromic Compositions

摘要

The present invention pertains to a reversible thermochromic system comprising a &bgr;-phenylvinylketone or a ω-phenyl polyacetylenyl ketone with at least one acidic hydrogen and a base and to a reversible thermochromic composition comprising the reversible thermochromic system and a carrier material and to novel substituted &bgr;-phenylvinylketones or ω-phenyl polyacetylenyl ketones with at least one acidic hydrogen.