Continuous dyeing of polyester fibers and cellulose fibers

Claim 1

A process for the continuous dyeing of polyester fibers, cellulose fibers or blends of these fibers, which process comprises: continuously applying to said fibers an aqueous dye liquor which contains I. a disperse dye for polyester fibers, and for cellulose fibers a dye selected from the group consisting of vat dyes, naphthol dyes, sulfur dyes and direct dyes, and Ii. from 0.5 to 70 g/l of said aqueous dye liquor of an antimigration agent selected from the group consisting of polyoxyalkylated amines, amine oxides of polyoxyalkylated amines and quaternized polyoxyalkylated amines which in 1% strength aqueous solution have a cloud point of at least 18° C and which are each derived from amines which contain at least 2 nitrogen atoms and at least one group which can be oxyalkylated and in which the polyoxyalkylene chain contains a. ethylene oxide units and b. a second component selected from the group consisting of propylene oxide, butylene oxide, cyclohexene oxide and styrene oxide units in the molar ratio a:b of from 10:1 to 0.1:1, said continuous application being carried out at a temperature below that at which the dye or dyes flocculate from the liquor; drying the fibers while heating at an elevated temperature sufficient to flocculate the dye or dyes from the liquor; and fixing the dye or dyes to said fibers.