Pressure sensitive carbonless duplicating systems and thermal ma

Details Pressure sensitive carbonless duplicating systems and thermal ma Pressure sensitive carbonless duplicating systems and thermal ma

1978-11-27

1981-02-17

Smith, Ronald H.

Textiles: manufacturing

427150, 427151, 427152, 428306, 428914, B41L 120

Patent

active

042510929

ABSTRACT:
3-Heteroaryl-3-(diphenylamino)phthalides useful as color formers in pressure-sensitive carbonless duplicating systems, thermal marking systems and hectographic copying systems are prepared by reacting 2-(heteroarylcarbonyl)benzoic acids with diphenylamines.

REFERENCES:
patent: 4075224 (1978-02-01), Crounse
patent: 4104437 (1978-08-01), Vincent
patent: 4151748 (1979-05-01), Baum

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