Reversible thermosensitive coloring composition and reversible t

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

1997-06-06

1999-09-21

McPherson, John A.

Radiation imagery chemistry: process, composition, or product th

Erasable imaging

503216, 503217, 503225, 430964, B41M 530

Patent

active

059552255

ABSTRACT:
A reversible thermosensitive composition including a coloring agent and a developer and capable of assuming a colored state and a discolored state depending upon the thermal hysteresis thereof. The developer is a phenol compound represented by the formula: ##STR1## wherein R.sup.1 and R.sup.3 represent, independently from each other, a substituted or non-substituted hydrocarbon group, R.sup.2 represents a substituted or non-substituted aliphatic hydrocarbon group having at least two carbon atoms, with the proviso that the total number of carbon atoms of R.sup.1, R.sup.2 and R.sup.3 is at least 8, X and Y represent, independently from each other, a divalent group having a nitrogen atom or an oxygen atom and r is an integer of between 1 and 3.

REFERENCES:
patent: 5395815 (1995-03-01), Ikeda et al.
patent: 5498772 (1996-03-01), Maruyama et al.

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