Reversible thermosensitive coloring composition and reversible t

Details Reversible thermosensitive coloring composition and reversible t Reversible thermosensitive coloring composition and reversible t

1999-01-27

2000-05-16

Klemanski, Helene

Compositions: coating or plastic

Coating or plastic compositions

Marking

106 3118, 106 3123, C09D 1100

Patent

active

060631732

ABSTRACT:
A reversible thermosensitive coloring composition is provided, which contains (a) an electron-donating coloring compound; and (b) an electron-accepting compound, which is an aromatic carboxylic acid compound comprising at least one hydrocarbon group, which induces color formation in the electron-donating coloring compound. The reversible thermosensitive coloring composition reversibly assumes a color-developed state or a decolorized state, in response to at least one of (1) the temperature thereof when heated and (2) the cooling rate of the reversible thermosensitive coloring composition when cooled after the heating thereof. A reversible thermosensitive recording medium using the coloring composition is also provided.

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