Nitro-phthalides, their manufacture and their use in recording s

Details Nitro-phthalides, their manufacture and their use in recording s Nitro-phthalides, their manufacture and their use in recording s

1976-03-15

1977-10-25

Love, Ethel G.

Textiles: manufacturing

106 145, 26032614R, 2603433R, 428307, B41L 136, C07D20920

Patent

active

040553582

ABSTRACT:
Nitro-phthalides of the formula ##STR1## in which E is a radical of the formula ##STR2## X and X' each represents alkyl with 1 to 12 carbon atoms, alkoxy with 1 to 12 carbon atoms or acyloxy with 2 to 12 carbon atoms, and X may also be hydrogen. Z represents hydrogen, alkyl having 1 to 12 carbon atoms or phenyl, Y represents hydrogen, alkyl having 1 to 12 carbon atoms, benzyl or cyanoethyl, R.sub.1, R.sub.2, R.sub.1 ' and R.sub.2 ', independently of the other, represents hydrogen, alkyl with 1 to 12 carbon atoms, alkoxyalkyl with 2 to 8 carbon atoms, cycloalkyl with 5 or 6 carbon atoms, benzyl or phenyl and the benzene ring B may be further substituted by halogen, nitro or an amino group optionally substituted by alkyl with 1 to 6 carbon atoms.
The nitro-phthalides are particularly useful as color formers which give intense green, blue-green or blue colors when they are brought into contact with an electron-accepting co-reactant.

REFERENCES:
patent: 3016308 (1962-01-01), Macaulay
patent: 3594369 (1971-07-01), Lin et al.
patent: 3703397 (1972-11-01), Lin et al.
patent: 3829322 (1974-08-01), Ozutsumi et al.
patent: 3954799 (1976-05-01), Borror

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