Styryl dyestuffs
AssigneeBayer Aktiengesellschaft
InventorHermann Beecken
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Abstract
The invention relates to water-insoluble styryl dyestuffs of the formula ##STR1## in which X is an O- or S-atom, B is an alkylene group, R is a hydrogen atom, an alkyl or aryl or the remaining members of ring system which is fused to the ring c, Z is a cyano group or a carboxylic acid ester. The dyestuffs are outstanding suitable for the dyeing of synthetic fibre materials which are dyed in greenish-yellow shades with good fastness properties, especially good resistance to hydrolysis.
Claims4
Water-insoluble styryl dyestuffs of the formula ##STR29## wherein D and E, independently of one another, are C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, trifluoromethyl, chlorine or bromine, and D additionally is phenyl, benzyl, cyclopentyl or cyclohexyl;
- provided that when more than one substituent on the same nucleus is tetra-butyl or trifluoromethyl they are on nonadjacent carbon atoms;
- m and n, independently of one another, are numbers 0 to 4;
- B is C.sub.2 H.sub.4, --CH(CH.sub.3)CH.sub.2 --, --CH(CH.sub.2 OCH.sub.3)CH.sub.2 --, or --CH(C.sub.6 H.sub.5)CH .sub.2 --;
- R is hydrogen, C.sub.1 -C.sub.4 -alkyl, or C.sub.1 -C.sub.4 -alkyl substituted by ethoxy, methoxy, cyano, or phenyl;
- Y.sub.1 is hydrogen, C.sub.1 -C.sub.4 -alkyl, trifluoromethyl, C.sub.1 -C.sub.4 -alkoxy, or chlorine;
- Y.sub.2 is hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, or chlorine;
- x is --O--;
- and
- Z is cyano or COOR, where R.sub.1 is C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkyl substituted by methoxy, ethoxy, chlorine, cyano, or phenyl.
Dependencies are inferred from the claim text.