Abstract: Compounds of formula I ##STR1## in which X is O or S;Y is O, S or NR.sub.3 where R.sub.3 is hydrogen or C.sub.1-4 alkyl (preferably methyl or ethyl) and rings A and B may be further substituted by non-chromophoric substituents.

Abstract: 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.

Abstract: 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,R.sub.3 is H, optionally substituted alkyl, cycloalkyl or phenyl or ##STR4## R.sub.4 is optionally substituted alkyl, R.sub.3 and R.sub.6 are H, alkyl, hydroxyalkyl or form together with N a heterocyclem is a whole number from 1 to 5 andn is 1 or 2,are optical brighteners suitable for cellulosic fibres, polyamide and polyurethane fibres and paper.

Abstract: 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,R.sub.2 and R.sub.5, independently, are hydrogen or alkyl or alkenyl, unsubstituted or substituted by a non-chromophoric group,R.sub.3 and R.sub.6, independently, are hydrogen, alkyl, carboxyl or a non-chromophoric esterified carboxyl group,or R.sub.2, together with R.sub.3, and/or R.sub.5 together with R.sub.6, signify an alkylene bridge,R.sub.7 and R.sub.8, independently, signify hydrogen or a non-chromophoric substituent,or, when R.sub.7 is in the 3-position and/or R.sub.8 in the 3' position, R.sub.7 together with R.sub.2, and/or R.sub.8 together with R.sub.5 signify an alkylene bridge,with the proviso that no more than one of R.sub.1 and R.sub.2 and no more than one of R.sub.4 and R.sub.5 signify hydrogen,their production and use as optical brightening agents.

Abstract: 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,R.sub.3 represents a hydrogen or halogen atom or a low molecular weight alkyl or alkoxy radical.

Abstract: 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.

Abstract: 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,rnh.sub.2 iwherein R is --OH, --NR.sub.1 R.sub.2 or ##STR1## X being O, S or NH, and R.sub.1 and R.sub.2 being, independently, hydrogen, C.sub.1-6 alkyl or C.sub.2-4 hydroxyalkyl,Which compounds are in free base or acid addition salt form or, when R is OH, in O-sulphonic acid form, and preparations for use in such process.

Abstract: 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,Y 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, with the proviso that X and Y do not simultaneously have a significance selected from hydrogen and C.sub.1-4 alkyl,R signifies an aryl radical, unsubstituted or substituted by up to two substituents selected from C.sub.1-4 alkyl, C.sub.1-4 alkoxy, chlorine, cyano, --COOM, --COOR.sub.1, --CONR.sub.4 R.sub.5, --SO.sub.2 NR.sub.4 R.sub.5, --SO.sub.2 R.sub.1 and --SO.sub.3 M,R.sub.1 signifies C.sub.1-4 alkyl or phenyl,R.sub.2 and R.sub.3, independently, signify hydrogen or C.sub.1-4 alkyl, either R.sub.4 and R.sub.5, independently, signify hydrogen or C.sub.1-4 alkyl,Or R.sub.4 and R.sub.

Abstract: 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.

Abstract: 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,R.sub.2 and R.sub.5, independently, are hydrogen or alkyl or alkenyl, unsubstituted or substituted by a non-chromophoric group,R.sub.3 and R.sub.6, independently, are hydrogen, alkyl, carboxyl or a non-chromophoric esterified carboxyl group, orR.sub.2, together with R.sub.3, and/or R.sub.5 together with R.sub.6, signify an alkylene bridge,R.sub.7 and R.sub.8, independently, signify hydrogen or a non-chromophoric substituent, or, whenR.sub.7 is in the 3-position and/or R.sub.8 in the 3' position, R.sub.7 together with R.sub.2, and/or R.sub.8 together with R.sub.5 signify an alkylene bridge,With the proviso that no more than one of R.sub.1 and R.sub.2 and no more than one of R.sub.4 and R.sub.5 signify hydrogen, their production and use as optical brightening agents.

Abstract: 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 radicalOr two of R.sub.1 , R.sub.2 and R.sub.3, together, form a methylenedioxy group, the other of R.sub.1, R.sub.2 and R.sub.3 having one of the above significances,R.sub.4 signifies a hydrogen atom, a chlorine or fluorine atom, an alkyl radical of 1 to 4 carbon atoms or an alkoxy radical of 1 to 4 carbon atoms,R.sub.

Abstract: 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.

Abstract: Disclosed are compounds of formula I, ##STR1## in which THE R.sub.1 's are the same and signify hydrogen or methyl,The R.sub.2 's are the same and signify hydrogen; C.sub.1-6 alkyl; cyclohexyl, unsubstituted or substituted by up to three C.sub.1-6 alkyl radicals; or benzyl, unsubstituted or substituted by up to two substituents selected from halogen, C.sub.1-6 alkoxy and C.sub.1-6 alkyl, andThe M's signify hydrogen or a nonchromophoric cation,Their production and use as optical brightening agents for cellulosic substrates, particularly paper substrates.

Abstract: 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,OrR.sub.1 and R.sub.2 together with the two carbon atoms of the triazole ring form a five or six membered cycloalkyl ring or such a cycloalkyl ring having condensed on it a benzene ring,R.sub.3 represents a hydrogen or halogen atom or a low molecular weight alkyl or alkoxy radical.

Abstract: 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 ofR.sub.1, r.sub.2 and R.sub.3 together form a methylenedioxy group, the other of R.sub.1, R.sub.2 and R.sub.3 having one of the above significances,R.sub.4 signifies a hydrogen atom, a chlorine or fluorine atom, an alkyl radical of 1 to 4 carbon atoms or an alkoxy radical of 1 to 4 carbon atoms,R.sub.

Abstract: Monobenzoxazolylstilbenes of formula ##STR1## wherein R--O is lower alkoxy and stands in one of the positions 5 or 6,R.sub.1 is hydrogen or lower alkyl andR.sub.2 is hydrogen, chlorine or lower alkyl.

Abstract: Disclosed are stilbene compounds of formula I, ##SPC1##in whichR.sub.1 signifies hydrogen, halogen or C.sub.1-6 alkyl,R.sub.2 signifies hydrogen or methyl,R.sub.3 signifies cyano or a radical --CONR.sub.7 R.sub.8 in which either R.sub.7 and R.sub.8, independently, each signifies hydrogen, C.sub.1-6 alkyl or C.sub.2-6 hydroxyalkyl, or R.sub.7 and R.sub.8, together with the nitrogen atom, signify a pyrrolidine, piperidine or morpholine radical,Either R.sub.4 and R.sub.5, independently, each signifiesC.sub.1-6 alkyl or C.sub. 2-6 hydroxyalkyl, or R.sub.4 and R.sub.5, together with the nitrogen atom, form a radical (a) ##EQU1## in which --X-- signifies --CH.sub.2 --, --O--, --S--, a direct bond, or --NR.sub.9 --, in which R.sub.9 signifies C.sub. 1-6 alkyl or C.sub.2-6 hydroxy-alkyl,R.sub.6 signifies hydrogen or C.sub.1-6 alkyl, unsubstituted or substituted by hydroxy, cyano or aminocarbonyl,M signifies hydrogen or a non-chromophoric cation,A.sup.

Abstract: Disclosed are compounds of formula I, ##SPC1##in which R.sub.1 signifies hydrogen, fluorine, bromine, chlorine, C.sub.1-6 alkyl, C.sub.1-6 alkoxy or --SO.sub.3 M,R.sub.2 signifies cyano or --CONR.sub.3 R.sub.4,in which either R.sub.3 and R.sub.4, independently, each signify hydrogen, C.sub.1-6 alkyl or C.sub.2-6 hydroxyalkyl,Or R.sub.3 and R.sub.4, together with the nitrogen atom to which they are attached, signify a pyrrolidino, piperidino or morpholino ring, andM signifies hydrogen or a non-chromophoric cation,Their production and use as optical brightening agents, particularly for cellulosic substrates such as paper and cotton.

Abstract: The invention provides novel pyrazoline derivatives which are useful as optical brighteners.

Abstract: The present invention provides novel compounds of the formula: ##SPC1##In whichR.sub.1 signifies hydrogen, fluorine or chlorine atom, a carboxylic or sulphonic acid group or an amide or ester thereof, a cyano group or an alkylsulphonyl or arylsulphonyl group,R.sub.2 signifies a hydrogen, fluorine or chlorine atom, a cyano group, a phenyl or alkyl radical which may be substituted, a carboxylic or sulphonic acid group or an amide or ester thereof, an alkylsulphonyl or arylsulphonyl group or a benzoxazole group which may be substituted,R.sub.3 and R.sub.4 independently signify a hydrogen, fluorine or chlorine atom, an alkyl radical of 1 to 6 carbon atoms which may be substituted, a cyano or carboxy group, a carboxylic acid amide or ester group, and R.sub.