Concentrated aqueous solutions of cationic colorant and procedure for their preparation

The present invention provides concentrated aqueous acid solutions of the colorant having the formula: in which A(-) represents the formate, acetate or propionate anion. The solutions are prepared starting with the corresponding chloride or sulfomethylate by forming the m- or p-nitrobenzoate, dissol...

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Bibliographic Details
Main Author DURANT; MARCEL
Format Patent
LanguageEnglish
Published 28.04.1981
Subjects
ADHESIVES
CHEMISTRY
DYES
LAKES
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
MORDANTS
NATURAL RESINS
ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES
PAINTS
POLISHES
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Summary:The present invention provides concentrated aqueous acid solutions of the colorant having the formula: in which A(-) represents the formate, acetate or propionate anion. The solutions are prepared starting with the corresponding chloride or sulfomethylate by forming the m- or p-nitrobenzoate, dissolving said salt in formic, acetic or propionic acid and eliminating the nitrobenzoic acid which is precipitated. The solutions of the invention can be used for coloring and printing fibers containing acid groups, and particularly acrylic fibers.
Bibliography:Application Number: US19790094615