Azo colorants for ball point pen and ribbon inks

Details Azo colorants for ball point pen and ribbon inks Azo colorants for ball point pen and ribbon inks

1988-09-15

1990-08-28

Higel, Floyd D.

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

106 22, 106 23, 106496, 534558, 534739, 534772, 534809, 534843, 534839, 534887, C09B 2901, C09B 2915, C09B 2933, C09B 2942

Patent

active

049526774

ABSTRACT:
Reddish-brown to yellow shade colorants suitable for ribbon and ball point inks are produced from the glassy waste by-product of pararosaniline manufacture by slurrying the residue in mineral acid, diazotizing, and coupling. the resulting colorants are useful in preparing inks.

REFERENCES:
patent: 3589897 (1971-06-01), Fox et al.
patent: 3686233 (1972-08-01), Gordon et al.
patent: 3884869 (1975-05-01), Conger
Vemratharaman, "Synthetic Dyes", Academic Press, vol. I, chapter 10 pp. 409 to 436 (1977).
Sen et al, J. Amer. Chem. Soc., vol. 46, pp. 111 to 119 (1924).

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