Record receiver having plural interactive leaves or a colorless – Having a colorless color-former – developer therefor – or... – Identified organic electron acceptor other than phenolic resin
Patent
1995-07-20
1997-09-09
Hess, Bruce H.
Record receiver having plural interactive leaves or a colorless
Having a colorless color-former, developer therefor, or...
Identified organic electron acceptor other than phenolic resin
503209, 503225, B41M 530
Patent
active
056656750
ABSTRACT:
In a thermal recording medium or an optically recordable thermal recording medium including a substrate having thereon a recording layer containing a colorless or pale colored dye precursor and a color developer reactable with the dye precursor to develop a color as main ingredients, the color developer includes at least one aminobenzenesulfonamide derivative of Formula (1): ##STR1## (wherein X denotes oxygen atom or sulfur atom; and R denotes substituted or unsubstituted phenyl group, naphthyl group, aralkyl group, a lower alkyl group of 1 to 6 carbon atoms, cycloalkyl group, or a lower alkenyl group of 2 to 6 carbon atoms. Z denotes a lower alkyl group of 1 to 6 carbon atoms or an electron attracting group. n is an integer from 0 to 4.).
REFERENCES:
patent: 4507670 (1985-03-01), Motosugi et al.
patent: 4517580 (1985-05-01), Iiyama et al.
"Near-Infra Red Dyes", Chemical Industries, vol. 43, May 1986, pp. 379-387 (and partial translation).
Hamada Kaoru
Nagai Tomoaki
Sekine Akio
Hess Bruce H.
Nippon Paper Industries Co. Ltd.
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