Novel monoazo and disazo colorants from aminoalkylanilines and b

Details Novel monoazo and disazo colorants from aminoalkylanilines and b Novel monoazo and disazo colorants from aminoalkylanilines and b

1978-10-10

1980-08-12

Sneed, Helen M. S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260174, 260176, 260197, C09B 2922

Patent

active

042172721

ABSTRACT:
Water-insoluble azo dyestuffs of the formula ##STR1## and water-soluble acid addition salts thereof useful for coloring natural fibers, synthetic fiber-forming material and cellulosic materials as well as in the manufacture of paper, varnishes, inks, coatings and plastics in which A represents an azoic coupling radical derived from a coupling component selected from the group consisting of arylides of hydroxy-substituted carbocyclic aromatic carboxylic acids, 1-aryl-5-hydroxy-pyrazoles, 6-amino-1-naphthol-3-sulfonic acid, and compounds having an enolizable ketomethylene group of the formula ##STR2## R is hydrogen, lower-alkyl, lower-alkoxy or halogen; R.sup.2 is hydrogen, lower-alkyl, lower-alkoxy, halogen, aminomethyl or 2-aminoethyl with the proviso that A is other than .beta.-naphthol when R.sup.2 is aminomethyl or 2-aminoethyl; R.sup.1 and R.sup.3 are the same or different and are each hydrogen, lower-alkyl, lower-alkoxy, halogen or aminomethyl with the proviso that at least one of R.sup.1 and R.sup.3 is aminomethyl when R.sup.2 is other than aminomethyl or 2-aminoethyl; and n represents an integer whose value is 1 or 2 and corresponds to the number of azo linkages, which dyestuffs are obtained by coupling a diazotized amine of the formula ##STR3## in which R, R.sup.1, R.sup.2 and R.sup.3 are as defined above with said coupling component.

REFERENCES:
patent: 2128255 (1938-08-01), Krzikalla et al.
patent: 3860571 (1975-01-01), Ramanathan

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