Bleaching and dyeing; fluid treatment and chemical modification – Reactive dye composition – process – or product – Alkylene sulfato – halotriazine – halodiazine,...
Patent
1997-07-22
1998-11-10
Einsmann, Margaret
Bleaching and dyeing; fluid treatment and chemical modification
Reactive dye composition, process, or product
Alkylene sulfato, halotriazine, halodiazine,...
8606, 8576, 8918, 8930, D06P 366, D06P 1165
Patent
active
058337202
ABSTRACT:
A method of dyeing cellulosic textile fibers with a dye which normally requires an exhaust salt. The method includes the step of forming a dye site, which includes the steps of treating the fibers with a dilute alkali solution containing an epoxy ammonium compound having an epoxy-reactive group which will permanently attach to cellulose hydroxyl groups to form a permanent cationic dye site, rinsing the fibers to remove any excess epoxy ammonium compound and at least some of the dilute alkali solution, and neutralizing any remaining alkali solution with a mild acid.
The method also includes the steps of dyeing the fibers in a dyebath containing a bifunctional reactive dye without a salt and at a temperature at or below 30.degree. C. (86.degree. F.) to dye exhaustion.
Kent Johnny Joe
Lee Eric C.S.
Yu Sui-Fung
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