Indigo dye process

Bleaching and dyeing; fluid treatment and chemical modification – Inorganic additive for dye composition – dye composition... – Group iiia metal

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Details

8631, 8148, 8653, 8930, 8111, D06P 134, D06P 360

Patent

active

056118228

ABSTRACT:
This invention provides processes for dyeing fibers with indigo including placing the fibers in a substantially enclosed compartment of a commercial dye apparatus, which is equipped with means for introducing a non-oxidizing gas into the compartment; prior to or following placing the fibers in the compartment, introducing a non-oxidizing gas into the compartment to produce a substantially non-oxidizing atmosphere therein; contacting the fibers with a dye liquor comprising leuco indigo in the compartment such that the leuco (reduced) indigo is taken up by the fibers; and oxidizing the leuco indigo taken up by the fibers to produce a blue color in the fibers.

REFERENCES:
patent: 678 (1838-04-01), Woodcroft
patent: 83502 (1863-10-01), Iversen
patent: 4166717 (1979-09-01), Fono et al.
patent: 4247295 (1981-01-01), Patxot
patent: 4283198 (1981-08-01), Fletcher
patent: 4378246 (1983-03-01), Gurley
patent: 4613336 (1986-09-01), Quinnen
patent: 4752301 (1988-06-01), Koch
patent: 4845789 (1989-07-01), Morton et al.
Trotman, E.R., "Dyeing and Chemical Technology of Textile Fibres," 6th Ed., (1984) Edward Arnold, A div. of Hodder & Stoughton, London Melbourne Auckland, pp. 306-309, no month available 1984.
Bliss, Ann, "A Handbook of Dyes from Natural Materials," Charles Scribner Sons (1981) pp. 38-39 no month available 1981.
Yoshii, A. et al., "Studies on the dyeing behavior of indigo in nitrogen," from Chemical Abstract CA109(22)192037f, no month available 1987.

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