Heat sensitive recording material

Details Heat sensitive recording material Heat sensitive recording material

1989-10-11

1992-01-07

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

503216, 503218, 503221, B41M 530

Patent

active

050792113

ABSTRACT:
The present invention provides a heat sensitive recording material which is less in fog in background area and has superior color toning effect with high image storage stability which contain a fluoran compound represented by the following formula in addition to an aromatic isocyanate compound and an imino compound having at least one >C.dbd.NH group which forms color upon application of heat: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 each represents a hydrogen atom, a lower alkyl group, a cyclohexyl group or an allyl group and R.sub.4 and R.sub.5 each represents a hydrogen atom, a lower alkyl group, a phenyl group, a cyclohexyl group or an aralkyl group. This heat sensitive recording material may further contain a heat fusible substance and/or a phenol compound to further improve heat responsivity or anti-fogging properties of background portion.

REFERENCES:
patent: 4824824 (1989-04-01), Matsushita et al.
patent: 4880767 (1989-11-01), Hiraishi
European Search Report and Annex to the European Search Report, 08/08/90.

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