Heat sensitive recording element

Details Heat sensitive recording element Heat sensitive recording element

1987-09-28

1989-04-04

Hess, Bruce H.

Record receiver having plural interactive leaves or a colorless

Having a colorless color-former, developer therefor, or...

Method of use, kit, or combined with marking instrument or...

427151, 428195, 428913, 428914, 503223, 503224, 503218, B41M 518

Patent

active

048187429

ABSTRACT:
A heat responsive recording element having a recording layer containing a colorless di- or tri- aryl compound having a closed ring moiety incorporating the meso carbon atom and containing a nitrogen atom directly bonded to the meso carbon. The nitrogen atom is also bonded to an arylating group that has a displaceable entity. Upon heating the recording layer imagewise the arylating group effects intramolecular arylation of the nitrogen atom with irreversible breaking of the meso carbon atom-nitrogen atom bond rendering the compound colored in the imagewise heating pattern.

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patent: 4536219 (1985-08-01), Riou et al.
patent: 4602263 (1986-06-01), Borror et al.
Kosar, J., Light-Sensitive Systems: Chemistry and Application of Nonsilver Halide Photographic Processes, New York, NY, John Wiley and Sons, Inc., 1976, pp. 402-419.

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