Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1976-09-20
1978-07-18
Higel, Floyd D.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
260162, 260163, 260465G, 548362, C09B 2900, C09B 2936, C09B 2938, D06B 376
Patent
active
041015401
ABSTRACT:
Azopyrazolium dyes of the formula: ##STR1## in which R.sub.1 represents an alkyl group or a phenyl group which may be substituted with a halogen atom or with a nitro, alkoxy or alkyl group, R.sub.2 represents an alkyl group; R.sub.3 represents an atom of hydrogen or halogen; R.sub.4 represents the residue of a coupler R.sub.4 H free of a sulfonic or carboxylic group; and X.sup.- represents a monovalent anion, and 3-trifluoromethyl-4-aryl-5-amino pyrazoles of the formula in which R.sub.3 and R.sub.4 have the same meanings as above and R'.sub.1 represents a hydrogen atom, an alkyl group, or a phenyl group which may be substituted with a halogen atom or with a nitro, alkoxy or alkyl group, are disclosed; methods are disclosed for making these compounds and using them for the dyeing of fibers based on polymers and copolymers of acrylonitrile or on acid-modified polyesters or polyamides to pure and brilliant shades having good fastness, especially fastness to light, e.g., for using the pyrazoles to form the dyes.
REFERENCES:
patent: 2908677 (1959-10-01), Straley et al.
patent: 3515715 (1970-06-01), Straley et al.
patent: 3948878 (1976-04-01), Coispeau
Higel Floyd D.
Produits Chimiques Ugine Kuhlmann
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