Sandoz Gmbh

Sandoz Ltd., (sandoz Ag)

Fritz Fleck

Alec Victor Mercer

Salvatore Valenti

Horst Schmid

Ivan Joseph Bolton

Hans Balzer

Horst Aebli

Hans-Rudolf Schmid

Peter Stuart Littlewood

Hans Kittl

Juerg Heller

Achim Wiedemann

Roger Paver

Emmanuel Hervot

Malcolm Oates

Peter Merk

Hans R Schmid

Compounds of formula I ##STR1## in which X is O or S;

Thieno[3,2-b]benzofuran and benzothiophene derivatives useful as optical

A non-chromophoric conjugated derivative of 7-styryl coumarin for use as an optical brightener in which the lactone ring of the coumarinyl group may have a benzene ring fused to it to form a 3,4-benzocoumarinyl-7 group, the phenyl group of the styryl is substituted by a conjugated group which contains a group derived from an acid in its conjugation and which group is so located as to conjugate with the ethylene group.

7-Styryl coumarin derivatives

Bis-(triazinylamino)-stilbenesulphonic acids ##STR1## wherein X is optionally substituted NH.sub.2 ##STR2## Y is a radical of formula Z is --COOR.sub.4, --CO--C.sub.m H.sub.2m+1, --CN or ##STR3## R.sub.1 is H, halogen, alkyl or alkoxy, R.sub.2 is H or alkyl,

Bis-(triazinylamino)-stilbenesulphonic acids

Disclosed are compounds of formula I ##STR1## in which R.sub.1 and R.sub.4, independently, are hydrogen, a non-chromophoric second order substituent, or alkyl or alkenyl unsubstituted or substituted by a non-chromophoric group,

Substituted divinyl stilbenes as optical brighteners

Polyester, cotton, polyamide and polyacrylonitrile fabrics and foils of polyvinylchloride are optically brightened by the addition of a compound of the formula ##STR1## in which each of R.sub.1 and R.sub.2 represents a hydrogen atom or an aliphatic, alicyclic, araliphatic, halogen- or alkyl-substituted araliphatic, aromatic, or halogen- or alkyl-substituted aromatic radical,

Fluorescent 1,2,3-triazole derivatives of 3-phenylcoumarin

Stilbene derivatives having at least one further phenyl substituent in the para-position to a benzene ring in the stilbene are optical brighteners particularly suitable for incorporation on spinning masses.

Para-phenyl stilbene derivatives

Disclosed is an optical brightening process for substrates comprising or consisting of synthetic polyamide in which the optical brightener is applied to the substrate by impregnation followed by heat treatment and wherein the brightener is applied in the presence of a compound or mixture of compounds of formula I,

Improved optical brightening of polyamides

Disclosed are compounds of formula I, ##STR1## in which X signifies hydrogen, C.sub.1-4 alkyl, cyano, --COOM, --COOR.sub.1, --CONR.sub.2 R.sub.3, --SO.sub.2 NR.sub.2 R.sub.3, --SO.sub.2 R.sub.1, --SOR.sub.1, --SO.sub.3 R.sub.1 or --SO.sub.3 M,

Triazolyl stilbene triazoles

This invention relates to new di-triazolylstyrene derivatives, useful as optical brighteners for organic polymeric materials, especially when applied to or incorporated in synthetic fibres.

Triazolylstyrene compounds

Divinyl stilbenes as optical brighteners

Disclosed are compounds of formula I, ##STR1## in which either R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, each signifies a hydrogen atom, a chlorine or fluorine atom, an alkyl radical of 1 to 4 carbon atoms, an alkoxy radical of 1 to 4 carbon atoms, a cyano group, a group --SO.sub.3 M, an unsubstituted phenyl radical or a phenyl radical substituted by up to 2 substituents selected from chlorine, fluorine, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms and the group --SO.sub.3 M, with the proviso that only one of R.sub.1, R.sub.2 and R.sub.3 signifies an unsubstituted or substituted phenyl radical

1,3-Diaryl-2-pyrazoline derivatives

Disclosed are compounds of formula I, ##STR1## in which THE R.sub.1 's are the same and signify hydrogen or methyl,

Bis-(triazinylamino) stilbene compounds

Polyester, cotton, polyamide and polyacrylonitrile fabrics and foils of polyvinylchloride are optically brightened by the addition of a compound of the formula ##STR1## in which each of R.sub.1 and R.sub.2 represents a hydrogen atom or an aliphatic, alicyclic, araliphatic, halogen- or alkyl-substituted araliphatic, aromatic, or halogen- or alkyl-substituted aromatic radical, Or

Disclosed are compounds of formula I, ##STR1## in which either R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, each signifies a hydrogen atom, a chlorine or fluorine atom, an alkyl radical of 1 to 4 carbon atoms, an alkoxy radical of 1 to 4 carbon atoms, a cyano group, a group --SO.sub.3 M, an unsubstituted phenyl radical or a phenyl radical substituted by up to 2 substituents selected from chlorine, fluorine, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms and the group --SO.sub.3 M, with the proviso that only one of R.sub.1, R.sub.2 and R.sub.3 signifies an unsubstituted or substituted phenyl radical, Or two of

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Bottmingen, Switzerland

Fritz Fleck