Compositions: coating or plastic – Coating or plastic compositions – Metal-depositing composition or substrate-sensitizing...
Patent
1994-12-23
1996-09-24
Bell, Mark L.
Compositions: coating or plastic
Coating or plastic compositions
Metal-depositing composition or substrate-sensitizing...
106316, 4284022, 428913, 503200, 503201, 503204, 503209, 503213, C09D 1100
Patent
active
055586996
ABSTRACT:
A thermochromic color-memory compositions exhibiting high color contrast between high color density in a colored state and sufficiently low color density in a decolored state with high freedom of selection of the reaction medium, and highly useful as a thermochromic material. The thermochromic color-memory composition comprises a homogeneous solubilized mixture of essential three components of (a) an electron-donating color-developing organic compound, (b) an electron-accepting compound, and (c) a reaction medium for controlling a color reaction of the component (a) with the component (b); the component (c) being selected from aliphatic ketones of 10 to 22 total carbons and aryl alkyl ketones of 12 to 24 total carbons; and the composition changing the color thereof with a large hysteresis width (.DELTA.H) of from 8.degree. C. to 80.degree. C.
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Nakashima Akio
Shibahashi Yutaka
Bell Mark L.
Hertzog Scott L.
The Pilot Ink Co., Ltd.
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