Heat sensitive recording material containing chromogenic dicyano

Details Heat sensitive recording material containing chromogenic dicyano Heat sensitive recording material containing chromogenic dicyano

1990-06-18

1991-03-05

Ramsuer, Robert W.

Record receiver having plural interactive leaves or a colorless

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

Identified color-former

503223, 427151, B41M 518

Patent

active

049978055

ABSTRACT:
Chromogenic dicyanomethylenepyrazolinone for thermographic recording processes and the corresponding cyanomethylene dyes of the formula ##STR1## in which R is hydrogen, hydroxyl, amino, alkyl, cycloalkyl, aryl, aralkyl or a heterocyclic radical, T.sub.1 and T.sub.2, independently of one another, are each hydrogen, unsubstituted or halogen-, hydroxyl-, cyano- or lower alkoxy-substituted alkyl having a maximum of 12 carbon atoms, cycloalkyl having 5 to 10 carbon atoms or unsubstituted or halogen-, cyano-, lower alkyl- or lower alkoxy-(ring)substituted phenalkyl or phenyl, or T.sub.1 and T.sub.2 together with the nitrogen linking them are a five- or six-membered heterocyclic radical, and rings A and B, independently of one another, are unsubstituted or substituted by halogen, cyano, nitro, lower alkyl, lower alkoxy, (lower alkyl)carbonyl or (lower alkoxy)carbonyl.

REFERENCES:
patent: 4006178 (1977-02-01), Stagi et al.
patent: 4119622 (1978-10-01), Baumann et al.

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