Duplicating and marking systems

Details Duplicating and marking systems Duplicating and marking systems

1980-08-29

1982-08-10

Hess, Bruce H.

Textiles: manufacturing

427151, 428537, 428913, 428914, 4283208, 548463, 549299, B41M 516, B41M 518, B41M 522

Patent

active

043434932

ABSTRACT:
This invention relates to 3,7-bis(disubstituted aminophenyl- or indolyl)-3,7-bis(diphenylamino)pyromellitides, 3,5-bis(disubstituted aminophenyl- or indolyl)-3,5-bis(diphenylamino)pyromellitides and mixtures thereof useful as color formers, particularly in carbonless duplicating and thermal marking systems, which are prepared by the interaction of 2,5-bis(disubstituted aminophenyl- or indolyl)carbonyl-1,4-benzenedicarboxylic acids or 2,4-bis(disubstituted aminophenyl- or indolyl)carbonyl-1,5-benzenedicarboxylic acids and mixtures thereof with diphenylamines.

REFERENCES:
patent: 3268537 (1966-08-01), Gosnell et al.
patent: 3491117 (1970-01-01), Lin
patent: 4168378 (1979-09-01), Schmidt et al.
patent: 4182714 (1980-01-01), Schmidt et al.
patent: 4200313 (1981-04-01), Schmidt et al.
J. Org. Chem., 42 (17), pp. 2929-2930 (1977).

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