Recording material with a display composition including a colori

Details Recording material with a display composition including a colori Recording material with a display composition including a colori

1992-06-02

1993-01-12

Beck, Shrive

Record receiver having plural interactive leaves or a colorless

Having a colorless color-former, developer therefor, or...

Color developed by mere decomposition of color-former

503225, 106 21A, 428204, 428206, 428913, B41M 520, B32B 700, C09D 1100

Patent

active

051790653

ABSTRACT:
Disclosed herein is a display composition which comprises a dye and a clay mineral in which quaternary ammonium ions are bound between layers through ion exchange, said display composition undergoing reversible color development and color fading through the oxidation and reduction of said dye, the oxidation causing said dye to form a color and to be bound between the layers of said clay mineral through ion exchange with said quaternary ammonium ions, the reduction causing the dye to discolor and to be desorbed out of the interlaminar space of the clay mineral and also causing the quaternary ammonium ions to be bound again between the layers through ion exchange. Disclosed also herein are a coloring pigment and recording material which employ the display composition.

REFERENCES:
patent: 2695245 (1954-11-01), Compton
patent: 3950180 (1976-04-01), Kato
patent: 4341565 (1982-07-01), Martenson
patent: 4746570 (1988-05-01), Suzuki et al.
patent: 4875762 (1989-10-01), Kato et al.
patent: 4963192 (1990-10-01), Dessauer
patent: 5028351 (1991-07-01), Kato et al.
Derwent Abstract of Japanese, Published Application No. 8462 of 1975.
Patent Abstracts of Japan, vol. 6, No. 104 (p-122) [982] Jun. 15, 1982, Abstract of Japanese Published Application 57-35753 of Feb. 26, 1982.

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