Textiles: manufacturing
Patent
1979-10-03
1982-09-14
Hess, Bruce H.
Textiles: manufacturing
427151, 427152, 428537, 428913, 428914, 4283208, 430200, 430348, B41M 516, B41M 518, B41M 522
Patent
active
043492185
ABSTRACT:
Fluoran compounds of the formula ##STR1## wherein one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represents n-alkyl having 6 to 12 carbon atoms and the other R's, independently of each other, represent hydrogen, alkyl having 1 to 12 carbon atoms, alkoxyalkyl having 2 to 8 carbon atoms or benzyl optionally substituted in the ring by nitro, halogen or alkyl having 1 to 6 carbon atoms.
The fluoran compounds are particularly useful as color formers which give intense dark green color when they are brought into contact with an electron-accepting co-reactant.
REFERENCES:
patent: 3244549 (1966-04-01), Farnham et al.
patent: 3501331 (1970-03-01), Kimura et al.
patent: 3669711 (1972-06-01), Kimura et al.
patent: 3825432 (1974-07-01), Futaki et al.
patent: 3825561 (1974-07-01), Akamatsu et al.
patent: 3929831 (1975-12-01), Garner et al.
patent: 4007195 (1977-02-01), Garner et al.
Ioffe et al., Jour. Org. Chem., U.S.S.R., vol. 6(2), Feb. 1970, pp. 356-358.
Garner Robert
Petitpierre Jean C.
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