One-bath dyeing of polyester-cellulosic blends using disperse and sulfur dyes
AssigneeSandoz Ltd.
InventorsMark S. Carlough, Laszlo A. Meszaros
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Abstract
Polyester-cotton blend textile substrates are dyed with a disperse dye and then with a sulfur dye from the same dyebath which is maintained at a temperature no higher than 105.degree. C. when the sulfur dye is present therein and which preferably contains glucose as the reducing agent for the sulfur dye.
Claims24
A method for the one-bath dyeing of a polyester-cellulosic blend substrate, which comprises exhaust dyeing said substrate with a disperse dye in an aqueous medium and subsequently exhaust dyeing said substrate with a water-soluble or water-dispersible sulfur dye under alkaline conditions and in the presence of a reducing agent in the same aqueous medium, said method being characterized in that the temperature of said aqueous medium is kept at or below 100.degree. C. after the sulfur dye has been added thereto.
Dependencies are inferred from the claim text.