Hard water-tolerant dye solutions

Details Hard water-tolerant dye solutions Hard water-tolerant dye solutions

1976-03-22

1977-03-29

Schofer, Joseph L.

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

8 85A, 8 88, C09B 100, C09B 562, D06P 120

Patent

active

040146464

ABSTRACT:
Improved concentrated dye solutions comprising anionic monosulfonated anthraquinone dye, the cations including alkanolammonium cations, in a mixed solvent of water and an inert organic cosolvent, the improvement comprising the addition thereto of about 0.03 to 0.20 part by weight, per part of dye of ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, or N-hydroxyethylethylenediaminetriacetic acid, said dye solution containing no more than about 0.2 percent, based on total solution weight, of cations other than alkanolammonium cations.

REFERENCES:
patent: 1131516 (1915-03-01), Herzberg et al.
patent: 2314356 (1943-03-01), Lee et al.
patent: 2992064 (1961-07-01), Musser
Summersgill, J. Soc. Dyers and Colourists, 1953, 70, 278-283.
"Keys to Chelation with Versene Chelation Agents", Dow Chemical Co. Bulletin.

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