Water-soluble vinyl sulfonyl-type reactive monoazo yellow dyestuffs mixtures with high color yield
AssigneeHoechst Celanese Corporation
InventorsThomas S. Phillips, Anthony J. Corso
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Abstract
This invention is directed to mixtures of water-soluble, fiber reactive yellow dyestuffs which exhibit superior build-up and color properties over those properties obtained with the individual components of the mixtures. The dyestuffs disclosed herein have the following general formula in their free acid form: ##STR1## wherein R is lower alkyl, lower alkoxy or hydrogen and wherein X is --CH.dbd.CH.sub.2 or --CH.sub.2 CH.sub.2 --Z wherein Z is --OH, --Cl, --Br, --OSO.sub.3 H, --SSO.sub.3 H, OPO.sub.3 H.sub.2 or --N(R.sub.1).sub.2, and wherein R.sub.1 is lower alkyl or hydrogen.
Claims16
A water-soluble, fiber-reactive, yellow, azo dyestuff mixture comprising a first and a second, azo dyestuff having the following general formula in their free acid form:
- ##STR15## wherein X is --CH.dbd.CH.sub.2 or --CH.sub.2 --CH.sub.2 --Z wherein Z is --OH, --Cl, --Br, --OSO.sub.3 H, --SSO.sub.3 H, --OPO.sub.3 H.sub.2 or --N(R.sub.1).sub.2, wherein R.sub.1 is independently selected from a one to four carbon-atom, lower alkyl and hydrogen;
- wherein said first dye, the moieties R are positioned in ring positions 2,5,2',5' and wherein the moieties --SO, --X, --HO.sub.3 S-- are positioned in ring positions 4,4';
- wherein said second dye, the moieties R are positioned in ring positions 2,5,2',4' and the moiety --HO.sub.3 S-- is positioned in ring position 4 and the moiety --SO.sub.2 --X is positioned in ring position 5';
- wherein the moiety R is independently selected from lower alkyl and lower alkoxy having one to four carbon atoms with the proviso:
- (1) that said first or said second dye contain at least one R moiety selected from lower alkyl;
- (2) that each of said dye contain at least two R moieties selected from lower alkoxy and (3) that the mixture of said dye has a higher color yield value than the color yield value of said first or said second dyestuff.
Dependencies are inferred from the claim text.