Rope dyeing process using halogen indigo derivative and dyed art

Details Rope dyeing process using halogen indigo derivative and dyed art Rope dyeing process using halogen indigo derivative and dyed art

1990-07-09

1991-10-29

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Dye or potential dye composition, additive, treatment,...

Sulfur dye or vat dye

8111, 8504, 8918, C09B 704, D06P 122

Patent

active

050612905

ABSTRACT:
Disclosed is a dyeing process for rope dyeing denim cotton yarns a fashion blue color which comprises the steps of forming the yarns into a rope; repeatedly immersing the rope in a dye bath containing a reduced water soluble form of a halogenated indigo derivative which is air oxidizable, squeezing the rope to remove dye bath liquid therefrom exposing the damp rope air to air oxidize the reduced form of the indigo derivative in the yarn; and then further oxidizing the incompletely oxidized reduced form of the indigo derivative in the yarn forming the rope in an oxidizing bath containing a chemical oxidant, e.g., sodium perborate.

REFERENCES:
patent: 4198204 (1980-04-01), von der Eltz et al.
patent: 4613336 (1986-09-01), Quinnen
patent: 4941887 (1990-07-01), Sakagawa et al.
patent: 5034016 (1991-05-01), Koshida
H. Zollinger, "Color Chemistry" (VCH), 1987, pp. 149, 152-154 and 158-159.
E. R. Trotman, "Dyeing and Chemical Technology of Textile Fibres," Sixth Edition (Wiley-Interscience), 1984, pp. 412, 420.
Colour Index (Third Edition), vol. 4 (Soc. Dyers and Colourists), 1971, p. 4639.

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