Preparation of a dye for coloring protein-based fibers and cellu

Details Preparation of a dye for coloring protein-based fibers and cellu Preparation of a dye for coloring protein-based fibers and cellu

1997-09-30

1999-07-13

Diamond, Alan

Bleaching and dyeing; fluid treatment and chemical modification

Dyeing involving animal-derived natural fiber material ,...

8406, 8438, 8524, 8638, 8641, 8649, 8650, 8652, 8658, 8662, 8680, 8681, 8916, 8917, 8918, 8919, D06P 306, D06P 304, D06P 130

Patent

active

059220856

ABSTRACT:
A process of preparing a dye composition and a resultant dye composition. The process includes preparing a mixture comprising a triphenylmethane dye and oxidation products by reacting methylenedianiline, aniline, an oxidation catalyst, and an oxidant; separating the oxidation products from the triphenylmethane dye to produce an aqueous solution of oxidation products; treating the solution of oxidation products with a basic compound; separating unreacted aniline from the solution of oxidation products and forming a mixture of oxidation products; and sulfonating the mixture of oxidation products to form a dye composition.

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Colour Index, Third Edition, vol. 4, p. 4393 (month unknown), 1971.
Green et al., J. Soc. Dyers Colourists, 29, pp. 105-115, Apr. 1913.

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