Marking systems containing 3-aryl-3-heterylphthalides and 3,3-bi

Details Marking systems containing 3-aryl-3-heterylphthalides and 3,3-bi Marking systems containing 3-aryl-3-heterylphthalides and 3,3-bi

1978-01-11

1980-02-19

Herbert, Jr., Thomas J.

Textiles: manufacturing

260315, 26032614R, 26032637, 427144, 427148, 427150, 427151, 427261, 428307, 428913, 428914, B41L 136, B41M 516, B41M 518

Patent

active

041891716

ABSTRACT:
3-Aryl-3-indolylphthalides, 3-aryl-3-pyrrolylphthalides and 3-aryl-3-carbazolylphthalides prepared by interaction of the appropriate 2-(heteroaryl)carbonylbenzoic acid and the appropriate phenylamine, and 3,3-bis(indolyl)phthalides prepared by the interaction of the appropriate 2-(indolyl)carbonylbenzoic acid and the appropriate indole are useful as color formers in pressure-sensitive carbonless duplicating systems, thermal marking systems and hectographic copying systems.

REFERENCES:
patent: 3427971 (1969-02-01), Steber et al.
patent: 3491111 (1970-01-01), Lin
patent: 3491116 (1970-01-01), Lin
patent: 3509173 (1970-04-01), Lin
patent: 3509174 (1970-04-01), Lin
patent: 3774539 (1973-11-01), Miyazaua et al.
patent: 3779753 (1973-12-01), Bloom et al.
patent: 3792481 (1974-02-01), Nagashima et al.
patent: 3924041 (1975-12-01), Miyayama et al.
patent: 3962526 (1976-06-01), Panken
patent: 4094877 (1978-06-01), Crounse et al.
patent: 4491112 (1970-01-01), Lin

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