Uniformly dyed water-swellable cellulosic fibers
AssigneeBASF SE
InventorsJohannes Dehnert, Gunther Lamm, Werner Juenemann, Guenter Meyer
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AssigneeBASF SE
InventorsJohannes Dehnert, Gunther Lamm, Werner Juenemann, Guenter Meyer
Estimating the term…
Uniformly dyed water-swellable cellulosic fibers which are fast to washing, dry-cleaning, sublimation and light and have been produced by contacting water-swellable cellulose fibers sequentially or concomitantly with water, ethylene glycol or a derivative thereof and, while the fibers are still swollen, an essentially water-insoluble dye of the formula ##STR1## in which D is the radical of a diazo component; R is hydrogen, C.sub.1 to C.sub.7 alkyl, phenyl or phenyl bearing methyl as a substituent; X is cyano, carbamoyl or substituted carbamoyl; R.sup.1 is hydrogen or an aliphatic, cycloaliphatic, araliphatic or aromatic radical; R.sup.2 is hydrogen or an aliphatic, cycloaliphatic or araliphatic radical; R.sup.3 and R.sup.4 independently of one another have the same meanings as R.sup.1 and R.sup.2 ; and R.sup.1 --n--r.sup.2 and R.sup.3 --N--R.sup.4 independently of one another are saturated heterocyclic radicals.
Uniformly dyed water-swellable cellulosic fibers, said fibers being fast to washing, dry cleaning, sublimation and light and having been produced by contacting water-swellable cellulose fibers subsequently or concomitantly with water, ethylene glycol or a derivative thereof and, while the fibers are still swollen, an essentially water-insoluble dye of the formula ##STR342## in which D is phenyl substituted by cyano, trifluoromethyl, methyl, fluoro, chloro, bromo, C.sub.1 to C.sub.4 alkylsulfonyl, phenylsulfonyl, ##STR343## anthraquinonyl;
Dependencies are inferred from the claim text.