Thermal imaging method

Details Thermal imaging method Thermal imaging method

1987-10-29

1990-10-02

Gerstl, Robert

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548212, 548409, 548470, 548466, C07D27506, C07D491113, C07D51310

Patent

active

049609017

ABSTRACT:
A thermal imaging method is provided which comprises heating imagewise a di- or triarylmethane compound possessing within its di- or triarylmethane structure an aryl group substituted in the ortho position to the meso carbon atom with a moiety ring-closed on the meso carbon atom directly through a nitrogen atom, which nitrogen atom is also bound to a group with a masked acyl substituent that undergoes fragmentation upon heating to liberate the acyl group for effecting intramolecular acylation of said nitrogen atom to form a new group in the ortho position whereby the di- or triarylmethane compound is rendered colored in an imagewise pattern corresponding to said imagewise heating.

REFERENCES:
patent: 4228075 (1980-10-01), Bloom
patent: 4290951 (1981-09-01), Foley
patent: 4663518 (1987-05-01), Borror

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