Azo color former containing heat-sensitive recording material

Details Azo color former containing heat-sensitive recording material Azo color former containing heat-sensitive recording material

1976-02-23

1978-12-26

Higel, Floyd D.

Coating processes

Transfer or copy sheet making

Decal or embossing foil type

260196, 260205, 260206, 260207, 2602071, 427145, 427207A, 427150, 427152, 427261, 428318, 428323, 428411, 428481, 428492, 428511, 428535, 428913, B41M 518, B41M 526, C09B 2906, C09B 2908

Patent

active

041316959

ABSTRACT:
A heat-sensitive recording material which contains as color former at least one azo compound of the formula ##STR1## WHEREIN D represents a phenyl radical which is unsubstituted or substituted by halogen, alkyl, alkoxy, aryloxy, alkoxycarbonyl, N,N-dialkylaminocarbonyl, acylamino, N-acyl-N-alkylamino or the group ##STR2## wherein each of Y.sub.1 and Y.sub.2 independently represents alkyl or aryl or, together with the nitrogen atom to which they are attached, represent a heterocyclic ring which optionally contains an oxygen atom,
X.sub.1 represents hydrogen or alkyl,
X.sub.2 represents alkyl, cyanoalkyl or arylmethyl, or X.sub.1 and X.sub.2, together with the nitrogen atom to which they are attached, represent a heterocyclic ring which optionally contains an oxygen atom,
X.sub.3 represents alkyl or aryl, and n is 1 or 2; said color former being dispersed or dissolved in a fusible binder layer on a substrate, and the material also containing an electron acceptor substance as a color developer.

REFERENCES:
patent: 2970909 (1961-02-01), Slimowicz
patent: 3152038 (1964-10-01), Urbschat et al.
patent: 3508492 (1970-04-01), Seibert et al.
patent: 3598802 (1971-08-01), Weaver et al.
patent: 3647503 (1972-03-01), Mizutani et al.
patent: 3871065 (1975-03-01), Iomiyama et al.
patent: 3924041 (1975-12-01), Miyayama et al.
patent: 4011352 (1977-03-01), Janssens et al.

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