Carbonless duplicating systems

Details Carbonless duplicating systems Carbonless duplicating systems

1979-06-14

1981-01-06

Hess, Bruce H.

Textiles: manufacturing

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

Patent

active

042432502

ABSTRACT:
Substituted furopyridinones and furopyrazinones which are useful as color formers in pressure-sensitive carbonless duplicating systems and thermal marking systems are prepared by reacting diphenylamines with substituted benzoyl (or 3-indolylcarbonyl)pyridinecarboxylic acids and substituted benzoyl (or 3-indolylcarbonyl)pyrazinecarboxylic acids, respectively.

REFERENCES:
patent: 3509171 (1970-04-01), Lin
patent: 3775424 (1973-11-01), Farber
patent: 3853869 (1974-12-01), Farber

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