Reversible thermal recording medium

Details Reversible thermal recording medium Reversible thermal recording medium

1996-05-31

1998-12-15

Hess, Bruce H.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

503204, 503208, 503209, 503216, 503217, B41M 534

Patent

active

058496513

ABSTRACT:
A reversible thermal recording medium comprises a composition containing a color former, a developer, a reversible material capable of reversibly changing the state of the composition by supplying heat energies with two different values, and, as required, a phase separation controller which permits changing the phase separation speed of the developer at temperatures in the vicinity of the melting point of the phase separation controller, at least 80% by weight of the reversible material being a sterol compound in which the carbon-to-carbon bond between 2- and 3-positions of the stroid skeleton is a single bond, the carbon-to-carbon bond between 3- and 4-positions of the steroid skeleton is a single bond, a hydroxyl group is attached to the carbon atom in at least the 3-position of the steroid skeleton, and a specified chemical structure is bonded at 16- and 17-positions of the stroid skeleton, and the phase separation controller being provided by a low molecular organic material, the maximum carbon chain length there of being at least 10.

REFERENCES:
patent: 5296439 (1994-03-01), Maruyama et al.
Katsuyuki Naito, "Amorphous-Crystal Transition of Organic Dye Assemblies: Application to Rewritable Color Recording Media", Appl. Phys. Lett., vol. 67, (pp. 211-213), Jul. 10, 1995.
Yasuro Yokota, et al., "Rewritable Thermal Recording Material", Japan Hardcopy, 1993.

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