Carbonless duplicating systems

Details Carbonless duplicating systems Carbonless duplicating systems

1979-03-12

1980-04-29

Hess, Bruce H.

Textiles: manufacturing

106 21, 427151, 428307, 428411, 428537, 428913, 428914, B41M 516, B41M 518, B41M 522

Patent

active

042003130

ABSTRACT:
3-[4-(Disubstituted-amino)phenyl] or (9-julolidinyl)-3-(diphenylamino)phthalides useful as color formers in pressure-sensitive and thermal marking systems are prepared by reaction of 2-[4-(disubstituted-amino)benzoyl] or (9-julolidinyl-carbonyl)benzoic acids with diphenylamines.

REFERENCES:
patent: 2997481 (1961-08-01), Wheeler et al.
patent: 4094877 (1978-06-01), Crounse et al.
Valters et al., Chem. Abstracts, vol. 84, 1976, 84:58409r.
The Ring Index, 2nd Ed., American Chemical Society, Washington, D.C., 1960, p. 452.

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