Reversible thermochromic composition

C - Chemistry – Metallurgy – 09 – K

Patent

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Details

C09K 9/02 (2006.01) B41M 5/30 (2006.01) B41M 5/327 (2006.01) B41M 5/28 (2006.01)

Patent

CA 2249519

A reversible thermochromic composition is provided which contains a specified diazarhodamine lactone derivative as an electron-donating color-developing organic compound, an electron-accepting compound, and a reaction medium for causing an electron exchange reaction between the components and reversibly at a specified temperature range. This reversible thermochromic composition develops clear reddish color at a colored state, and becomes colorless at a decolored state without residual color.

Divulgation d'une préparation thermochromique réversible renfermant un dérivé déterminé de la lactone de diazarhodamine, employé comme composé organique, chromogène, donneur d'électrons, un électroaccepteur et un milieu de réaction qui provoque une réaction d'échange d'ions entre les constituants et qui inverse cette réaction dans une plage de températures donnée. Cette préparation thermochromique réversible produit une couleur rouge clair, à l'état coloré, et devient parfaitement incolore, à l'état décoloré.

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