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
1994-03-07
1995-09-12
Hess, B. Hamilton
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
427150, 427151, 503225, B41M 530
Patent
active
054496578
ABSTRACT:
A thermosensitive recording material having an enhanced color-developing property and a high persistency of the resultant colored images formed thereon, is provided with a thermosensitive colored image-forming layer formed on a substrate sheet and comprising a substantially colorless dye precursor and a color developing agent comprising at least one aromatic compound of the formulae (I) and (II): ##STR1## wherein X and Y are an oxygen or sulfur atom, R.sup.1 is an alkyl, cycloalkyl, alkenyl or alkynyl group or a hetero atom-containing alkyl, cycloalkyl or alkenyl group having at least one hetero atom included in a backbone group thereof, R.sup.2 is an aryl or aralkyl group or a substituted aralkyl group having at least one hetero atom substituent, R.sup.3 is an unsubstituted aralkyl group or substituted aralkyl group having at least one hetero atom substituted in an aliphatic hydrocarbon group thereof, and R.sup.4 is an unsubstituted or substituted alkyl group, unsubstituted aralkyl group, aryl group, substituted alkyl group, or substituted aralkyl group having at least one hetero atom substituted in an aliphatic hydrocarbon group thereof, an aromatic hydrocarbon ring group included in each of the groups represented by R.sup.1 to R.sup.4 optionally having at least one substituent.
REFERENCES:
patent: 3539375 (1970-11-01), Baum
patent: 5246906 (1993-09-01), Takahashi et al.
Hess B. Hamilton
New Oji Paper Co. Ltd.
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