Derivatives of dianhydrides as vinyl color formers

Details Derivatives of dianhydrides as vinyl color formers Derivatives of dianhydrides as vinyl color formers

1975-04-10

1977-05-31

Love, Ethel G.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

106 19, 106 21, 2602403, 260295B, 260295F, 260295T, 260315, 26032614R, 26032625, 26032627, 26032634, 2603433R, C09B 2300

Patent

active

040268837

ABSTRACT:
A chromogenic compound of normally colorless form is disclosed having the following structural formula: ##STR1## wherein A and B can be ##STR2## T, X, Y and Z can be, among several others, hydrogen, alkyl, alkoxy, aryl, and heterocyclic, substituted and unsubstituted; and E can be a broad family of aromatic and heterocyclic structures. The compound is eligible for use in pressure-sensitive record materials and manifold marking systems. Because of light absorption characteristics, selected compounds of this invention are especially useful where machine readability and machine copiability are important.

REFERENCES:
patent: 3491117 (1970-01-01), Lin
Chem. Abstracts 83:10978c.
Chem. Abstracts 54:8422c.

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