Method for salt-free dyeing
AssigneeAmerican Emulsions, Co.
InventorsDavid M. Hall, Tony M. Leonard, Charles D. Cofield, Hugh W. Barrow
Life of this patent
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Abstract
The invention relates to a process for increasing the dyeability of textile fibers and fabrics without the need to use a salt in the dyebath. The dyeing is performed on fibers or fabrics which have been treated with sodium hydroxide and an epoxy ammonium salt of the formula: ##STR1## wherein R,R',R", and R"' are alkyl radicals having 1 to 8 carbon atoms, and X.sup.- is an anionic group selected from the group consisting of sulfate, sulfonate and halide.
Claims6
In a process for dyeing textile fibers or fabrics with a direct or reactive dye which includes the steps of washing and rinsing, the improvement which comprises the steps of a) treating the fibers or fabrics with about 0.5 to 10% by weight solution of sodium hydroxide, b) treating the fibers or fabrics with a solution about 2 to 15% by weight of an epoxy ammonium compound of the formula:
- ##STR5## wherein R, R.sup.1 and R" are alkyl radicals having 1 to 8 carbon atoms, R"' is an alkylene radicals having 1 to 8 carbon atoms and X.sup.- is an anionic group selected from the group consisting of sulfate, sulfonate and halide, and c) dyeing the fibers or fabrics in a dye bath without a salt for exhausting the dye in the dye bath at a temperature below 200.degree. F.
Dependencies are inferred from the claim text.