Chromenoindole color formers

Details Chromenoindole color formers Chromenoindole color formers

1978-08-21

1979-11-20

Lesmes, George F.

Textiles: manufacturing

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

Patent

active

041748565

ABSTRACT:
A chromenoindole compound of the formula ##STR1## wherein R.sub.1 and R.sub.2 independently of one another represent hydrogen, alkyl which has at most 12 carbon atoms and is unsubstituted or substituted by halogen, hydroxyl, cyano or lower alkoxy; cycloalkyl, phenyl, benzyl, or phenyl or benzyl which are substituted by halogen, lower alkyl or lower alkoxy, or R.sub.1 and R.sub.2, together with the nitrogen atom which links them, represent a 5-membered or 6-membered heterocyclic radical, Q is hydrogen, lower alkyl, phenyl, benzyl or the groups of the formulae (1a) or (1b) ##STR2## X and X' each represent hydrogen, halogen, lower alkyl or lower alkoxy, Y represents hydrogen, alkyl of 1 to 12 carbon atoms, phenyl or benzyl and the rings A and B independently of one another are unsubstituted or substituted by halogen, nitro, lower alkyl, lower alkoxy, phenoxy, amino or amino substituted by lower alkyl, phenyl or benzyl; these compounds are particularly useful as color formers which give intense red to blue color shades of excellent light fastness when they are brought into contact with an electron acceptor.

REFERENCES:
patent: 3929829 (1975-12-01), Borror

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