Record receiver having plural interactive leaves or a colorless – Having a colorless color-former – developer therefor – or... – Having nonchromogenic liquid spread-control or...
Patent
1993-08-18
1994-09-13
Hess, B. Hamilton
Record receiver having plural interactive leaves or a colorless
Having a colorless color-former, developer therefor, or...
Having nonchromogenic liquid spread-control or...
503210, 503211, 503212, 503216, 503225, B41M 530
Patent
active
053468783
ABSTRACT:
The heat-sensitive recording material disclosed comprises a colorless or pale colored dyestuff precursor, one or more salicylic acid derivative of the formula (1) or metal salt of the derivative and an aliphatic amide compound having 18.about.60 carbon atoms in molecular structure, and is excellent in thermal response and preservation stability of white portions and images. ##STR1## wherein X.sub.1 and X.sub.2 are a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an aralkyl group or an aryl group, Y.sub.1 and Y.sub.2 are an oxygen atom or a sulfur atom, R.sub.1 is a hydrogen atom, an alkyl group, an aralkyl group or an aryl group, and R.sub.2 is an alkyl group, an alkenyl group, an aralkyl group or an aryl group.
REFERENCES:
patent: 4824824 (1989-04-01), Matsushita et al.
patent: 4992411 (1991-02-01), Okhuru
Koike Naomasa
Nakatsuka Masakatsu
Okada Akinori
Hess B. Hamilton
Mitsubishi Paper Mills Limited
Mitsui Toatsu Chemicals Inc.
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