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US 4,083,688 AGranted
Disazo pyrazolyl dyed polyester fibers
AssigneeCiba-Geigy Corporation
InventorVisvanathan Ramanathan
Life of this patent
Estimating the term…
Abstract
Polyester fibers dyed with a disazo dyestuff consisting of two N-phenyl-pyrazole monoazo dyestuff moieties bound to each other via the phenyl groups, said phenyl groups attached to each other by an --O--, --S--, --NH--, cyclohexylidene, C.sub.1 -C.sub.2 -alkylene or --O-(C.sub.1 -C.sub.2 -alkylene)-O- divalent radical.
Claims5
Polyester fiber dyed with a disazo disperse dyestuff, free from --SO.sub.3 H groups impartingg solubility in water, and having the formula ##STR80## wherein Z is --O-- or --NH-;
- R.sub.1 and R.sub.2 each represent methyl or methoxy;
- and
- D.sub.1 and D.sub.2 each is a group of the formula ##STR81## wherein a is hydrogen, cyano, chloro, bromo, methyl, trifluoromethyl, carboxymethoxy, methylsulfonyl, nitro, methoxy, ethoxy, sulfonic acid amide, N-C.sub.1-3 alkyl sulfonic acid amide, N-isopropyloxypropyl sulfonic acid amide or N,N-di-C.sub.1-2 alkylsulfonic acid amide;
- b is hydrogen, bromo or chloro;
- c' is C.sub.1-2 -alkylcarbonyl, C.sub.1-2 -alkylaminocarbonyl, nitro, cyano C.sub.1-2 - alkylsulfonyl, carbo-C.sub.1-2 alkoxy, carbocyclohexyloxy, .beta.-chloroethylaminosulfonyl, sulfonic acid amide, N-C.sub.1-3 alkyl sulfonic acid amide, N-isopropyloxypropyl sulfonic acid amide or N,N-di-C.sub.1-2 -alkyl sulfonic acid amide.
2 more elements
Polyester fiber which is dyed with a dyestuff of the formula ##STR82##
Dependencies are inferred from the claim text.