Ciba-geigy Corporation

Ciba-geigy Ag

Nalin Binduprasad Desai

Visvanathan Ramanathan

Klaus Artz

Walter Jenny

Navnitrai Nagarji Naik

Ponnusami Jayaraman

A fluorescent pigment consisting of N-substituted iminocoumarins of the general formula I, ##STR1## wherein X.sub.1 is a cyano group, a carboxamido group or an aryl or a heteroaryl radical linked directly or through a --CO or --SO.sub.2 group,

Fluorescent pigments

A styryl dye devoid of acid, water-solubilizing groups, of the formula ##STR1## wherein two radicals Z represent groups of the formula --NR'R' and one Z represents a group of the formulae --NR'R', --OR'' or --S--R'', in which each of R', R' and R'' represents hydrogen unsubstituted phenyl, substituted phenyl, benzyl, phenylethyl, cyclohexyl, or an aliphatic radical containing up to 8 carbon atoms and R' and R'' are able to form a ring containing the amino nitrogen and the radicals --NR'R' may be the same or different, Y represents a radical of the formula --CN or --CONH.sub.2, and W represents the radical of an organic compound, which contains an active methylene group and which is bonded to the --CH.dbd. group through the carbon atom of the active methylene group, and Z.sub.3 is furthermore an unsubstituted or a substituted hydrocarbon radical containing up to 8 carbon atoms.

Styryl dyestuffs containing certain amino, cyanopyridine moieties

Polycyclic compounds of the general formula I ##STR1## in which the nucleus A can be further substituted, Y is a hydrogen atom or an optionally substituted hydrocarbon radical, and R.sub.1 and R.sub.2 each denote hydrogen, aryl, aralkyl, cycloalkyl or an aliphatic radical, and R.sub.1 and R.sub.2 can form a ring containing the amine nitrogen and mixtures thereof with one another. The dyestuffs dye natural and synthetic fibres in fast yellow and orange shades.

Polycyclic compounds

Azo dyestuffs containing at least one group of formula --X--CO--NR--SO.sub.2 aryl, wherein R is hydrogen alkyl or cycloalkyl and X is an oxygen or sulphur atom or a group of formula --NR.sub.1 --, wherein R.sub.1 is hydrogen alkyl or cycloalkyl. The dyestuffs dye polyester fibers in fast shades.

Growing community of inventors

Bombay, India

Nalin Binduprasad Desai