Carbonless duplicating and marking systems

Details Carbonless duplicating and marking systems Carbonless duplicating and marking systems

1981-08-06

1983-09-13

Hess, Bruce H.

Textiles: manufacturing

427150, 427151, 4283206, 4283208, 428488, 428537, 428913, 428914, B41M 516, B41M 518, B41M 522

Patent

active

044037910

ABSTRACT:
The invention provides processes for the preparation of both known and novel [bis(substituted-aryl)(indolyl)]methanes and [(substituted-aryl)(heteryl)(indolyl)]methanes, useful as color formers, particularly in carbonless duplicating and thermal marking systems, which comprises the interaction of [bis(substituted-aryl)(phenylsulfonyl)]methanes and [(substituted-aryl)(heteryl)(phenylsulfonyl)]methanes with indoles in the presence of either an alkaline or an acidic catalyst.

REFERENCES:
patent: 3637748 (1972-01-01), Psaar et al.
patent: 3642823 (1972-02-01), Raue et al.
patent: 3995088 (1976-11-01), Garner et al.
patent: 4054718 (1977-10-01), Garner et al.
Whitehead and Whitesilt, Journal of Medicinal Chemistry, 1974, vol. 17, No. 12, 1298-1304 (1974).

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