Abstract: A stable composition for treating textile substrates, which composition comprises at least(a) an organic solvent which is sparingly soluble or insoluble in water and in which component (b) is dissolved and components (c) and (d) are dissolved or dispersed,(b) a vehicle for component (c) which is sparingly soluble or insoluble in water,(c) a finishing agent which is sparingly soluble or insoluble in water and which is soluble or dispersible in the vehicle (b), and(d) a water-soluble acid having a pK value greater than 1 and optionally in addition(e) a solid carboxylic acid which is sparingly soluble in water,(f) a polar solventand/or further additives or assistants, e.g. surfactants or chelating agents.The novel composition, which preferably contains fluorescent whitening agents as finishing agents, is used in particular for whitening synthetic fibre materials, especially finished goods such as curtains or underwear, in acid medium.

Abstract: Disclosed is a method for marking mineral tanned leather by treating the unfinished leather with an anionic aqueous dispersion of a fluorescent pigment. The marked leather can then be sorted by exposure to UV-radiation.

Abstract: The invention relates to novel 4-styryl-4'-vinylbiphenyls of the formula ##STR1## wherein the benzene rings A, B and C can carry non-chromophoric substituents and R.sub.3 is a second order non-chromophoric substituent, and R.sub.4 is hydrogen or a non-chromophoric substituent which cannot be a second order substituent, and also a process for obtaining them. These novel compounds can be used as fluorescent whitening agents for treating organic material of high molecular weight, preferably textile material, most preferably polyester fibres. The invention also discloses novel intermediates of the formula ##STR2## wherein A, B and C are as defined above, which are formed during the production of the novel 4-styryl-4'-vinylbiphenyls, and also a process for obtaining them.

Abstract: A uniform mixture consisting essentially of an aqueous silicone elastomeric emulsion and mineral particles having an average particle diameter of greater than 150 micrometers is described. The emulsion comprises an anionically stabilized, hydroxyl endblocked polydiorganosiloxane, colloidal silica, and an alkyl tin salt. The uniform mixture can be applied to building surfaces such as structural foam insulation or wooden walls to provide a protective covering. The cured coating can provide protection from weathering, physical damage, and fire.

Abstract: The amphoteric styrene derivatives correspond to the formula ##STR1## in which X is oxygen, sulfur, a direct bond, --SO.sub.2 N(R.sub.5 --, --CON(R.sub.5 -- or --COO--, Y.sub.1 and Y.sub.2 independently of one another are C.sub.1 -C.sub.4 -alkylene or hydroxypropylene, R.sub.1 and R.sub.2 independently of one another are C.sub.1 -C.sub.4 -alkyl or, together with the N atom, are a pyrrolidine, piperidine, hexamethyleneimine or morpholine ring, and R.sub.1, together with R.sub.5, is also a piperazine ring, R.sub.3 and R.sub.4 are hydrogen, C.sub.1-4 -alkyl, chlorine, C.sub.1-4 -alkoxy or C.sub.3-4 -alkenyl or together, in the o-position relative to one another, are a trimethylene or tetramethylene group, R.sub.5 is hydrogen, C.sub.1-4 -alkyl or cyanoethyl or, together with R.sub.1, is a piperazine ring, Q is --COO or --SO.sub.3 and n is the number 1 or 2, and can be prepared by reacting the corresponding amine compounds with a halide of the formula Hal--Y.sub.

Abstract: Fibers which are equipped with at least one bleaching agent are obtained in that the fibers are contacted with a dispersion or a solution containing at least one bleaching agent, said dispersion or said solution is allowed to interact to the fibers and then the so treated fibers are dried.Preferably the fibers equipped according to the process of the invention are used as screen gauzes.

Abstract: The invention relates to a stable composition for treating textile substrates which contains at least(a) an organic solvent which is sparingly soluble to insoluble in water and in which component (b) is dissolved and component (c) is dissolved or dispersed,(b) a vehicle for component (c) which is sparingly soluble to insoluble in water, and(c) a finishing agent which is sparingly soluble to insolube in water and which is soluble or dispersible in the vehicle (b). In addition to components (a), (b) and (c), the composition of the invention may also contain(d) a solid carboxylic acid which is sparingly soluble in water, and preferably soluble in the solvent (a), and/or(e) a polar organic solvent as well as further additives or assistants.The novel composition, which preferably contains fluorescent whitening agents as finishing agents, is used in particular for whitening manmade textiles, especially made-up goods such as curtains or underwear.

Abstract: Cationic fluorescent whitening agents of the formula ##STR1## wherein B is a fluorescent whitening agent containing basic tertiary amino groups, m is the number of basic amino groups, and each of R.sub.1, R.sub.2 and R.sub.3 is alkyl of 1 to 4 carbon atoms which is unsubstituted or substituted by non-chromophoric groups, or is alkenyl of 2 to 4 carbon atoms which is unsubstituted or substituted by non-chromophoric groups. These compounds have good solubility in water and they make it possible to prepare concentrated solutions and can be used for whitening organic material.

Abstract: Cationic fluorescent whitening agents of the formula ##STR1## wherein B is a fluorescent whitening agent containing basic tertiary amino groups, m is the number of basic amino groups, and each of R.sub.1, R.sub.2 and R.sub.3 is alkyl of 1 to 4 carbon atoms which is unsubstituted or substituted by non-chromophoric groups, or is alkenyl of 2 to 4 carbon atoms which is unsubstituted or substituted by non-chromophoric groups. These compounds have good solubility in water and they make it possible to prepare concentrated solutions and can be used for whitening organic material.

Abstract: Cationic fluorescent whitening agents of the formula ##STR1## wherein B is a fluorescent whitening agent containing basic tertiary amino groups, m is the number of basic amino groups, and each of R.sub.1, R.sub.2 and R.sub.3 is alkyl of 1 to 4 carbon atoms which is unsubstituted or substituted by non-chromophoric groups, or is alkenyl of 2 to 4 carbon atoms which is unsubstituted or substituted by non-chromophoric groups. These compounds have good solubility in water and they make it possible to prepare concentrated solutions and can be used for whitening organic material.

Abstract: The invention relates to 4-heterocyclyl-4'-vinylstilbenes of the formula ##STR1## wherein Q is a monocyclic 5- or 6-membered aromatic heterocyclic ring which is unsubstituted or substituted by non-chromophoric groups and which contains no fused benzene rings or 1 or 2 fused benzene rings, or is a bicyclic 9-membered aromatic heterocyclic ring, phenyl which is unsubstituted or substituted by non-chromophoric groups, or is cyano, carboxyl, alkoxycarbonyl or alkylsulfonyl or arylsulfonyl, R.sub.o is hydrogen, alkyl which is unsubstituted or substituted by non-chromophoric groups, R.sub.1 is hydrogen, alkyl, alkoxycarbonyl, carbamoyl or sulfonamide, each of which is unsubstituted or substituted by non-chromophoric groups, or is alkenyl, carboxyl, alkylsulfonyl, arylsulfonyl or aralkylsulfonyl, cyano, sulfo or phosphonic acid dialkyl ester, and R.sub.2 is hydrogen, alkyl or alkenyl, each of which is unsubstituted or substituted by non-chromophoric groups, with the proviso that at most one of R.sub.1 and R.sub.

Abstract: A new process for manufacturing 2-stilbenyl-1,2,3-triazoles as well as new 2-stilbenyl-1,2,3-triazoles and their use for the optically brightening of organic material are disclosed.

Abstract: Stilbene compounds of the formula ##STR1## in which the rings A, B and C can carry non-chromophoric substituents, R.sub.1 is hydrogen, alkyl which is unsubstituted or substituted by non-chromophoric substituents, or aryl which is unsubstituted or substituted by non-chromophoric substituents, and R.sub.2 is a carboxyl group or a functional derivative thereof, a cyano group, a sulphonic acid ester group, a sulphonamide group or a sulphonyl group, and the use thereof as fluorescent brightening agents for high-molecular organic material.

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: New 1,4-bis-[azol-2'-yl]-naphthalene compounds, a process for their preparation as well as a process for optically brightening organic materials on using said compounds are disclosed.

Abstract: Benzodifuranes of the formula ##STR1## wherein R represents hydrogen, alkyl or halogen, each of R.sub.1, R.sub.2 and R.sub.3 represents hydrogen or different non-chromophoric substituents, with the proviso that at least one of the symbols R, R.sub.1, R.sub.2 or R.sub.3 does not represent hydrogen, processes for their production and the use thereof for whitening organic material of high molecular weight, especially polyester, polyvinyl chloride or polystyrene.

Abstract: A new process for the manufacture of cyano-substituted stilbene compounds, new stilbene compounds as well as their use as fluorescent brighteners or as intermediates for the manufacture of fluorescent brighteners are provided.

Abstract: Bis-triazinylaminostilbene compounds of the formula ##STR1## in which R.sub.1 is alkyl, alkenyl, cyclohexyl or phenylalkyl, R.sub.2 is hydrogen, alkyl, cyclohexyl, benzyl, alkyl which is substituted by hydroxyl, cyano, sulpho or carbamoyl, alkoxyalkyl or hydroxyalkoxyalkyl or alkoxyalkoxyalkyl or mono- or di-alkylaminoalkyl, and R.sub.3 is hydrogen, alkyl, alkyl which is substituted by hydroxyl, cyano or sulpho, or alkoxyalkyl or hydroxyalkoxyalkyl or R.sub.2 and R.sub.3 together with the nitrogen atom to which they are bonded are a morpholine ring or a pyrrolidine, piperidine, hexamethyleneimine or piperazine ring which is unsubstituted or substituted by 1 or 2 alkyl groups, and M is hydrogen or an alkali metal, ammonium or amine ion, and, if R.sub.2 or R.sub.3 is hydroxyalkyl, R.sub.1 is methyl, cyclohexyl or alkenyl only, and their use as fluorescent brightening agents for organic material of high molecular weight are disclosed.

Abstract: A process for improving the dry strength of paper and for improving the effect of optical brighteners in the preparation or coating of paper which includes the step of adding fillers and/or pigments and anionic brighteners to the paper making process the improvement comprising adding to paper making pulp a polypiperidine halide absorbed in a dispersed state on a fine-particle organic or inorganic carrier before the anionic brightener is added.

Abstract: Benzoxazolyl-phenyl-stilbenes of the formula ##STR1## in which X is a carboxylic acid group or an ester or amide thereof, a phenyl sulphonate group or a sulphonamide group, a cyano group or alkylsulphonyl and the ring A can be substituted by alkyl having 1 to 4 C atoms, phenyl, chlorine, alkoxy having 1 to 4 C atoms, phenoxy, cyano, alkylsulphonyl having 1 to 4 C atoms, phenylsulphonyl or alkoxycarbonyl having 2 to 6 C atoms, a process for their manufacture as well as their use for the optical brightening are disclosed.

Abstract: A process is disclosed for the production of a sun heat energy absorbing coating on a metallic substrate. The metallic substrate is pretreated for subsequent coating with a film of powder varnish and thereafter a coating based on a solid synthetic resin is deposited electrostatically or in a whirl sintering procedure. The coating consists of an inner brightening layer containing a metallic powder and an outer colored second layer absorbing the sun energy.

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: Disclosed is a textile wet treatment process wherein, to increase the lubricity of the substrate, certain specified polyurethanes are employed in the treatment liquor.

Abstract: Process for the manufacture of 2-stilbenyl-1,2,3-triazoles containing carboxyl groups by reacting a 2-tolyl-1,2,3-triazole with an anil in the presence of a strongly basic alkali compound in a strongly polar, neutral to basic organic solvent as well as novel 2-stilbenyl-1,2,3-triazoles containing carboxyl groups are described.

Abstract: Novel benzoxazole compounds of the formula ##STR1## wherein R.sub.1, R.sub.2 and A are certain substituents, a process for their manufacture as well as their use as optical brighteners are disclosed.

Abstract: The compounds of the formula ##STR1## WHEREIN X and Y denote halogen, hydroxyl, amino, alkoxy, aralkyloxy, cycloalkoxy, aryloxy, alkylmercapto, arylmercapto, alkylamino, dialkylamino, morpholino, piperidino, piperazino, pyrrolidino, acylamino, arylamino or alkyl,N denotes 0, 1 or 2 andQ denotes hydrogen, pyrazol-1-yl, oxazol-2-yl, benzoxazol-2-yl, naphthoxazol-2-yl, 1,2,4-oxadiazol-5-yl, 1,3,4-oxadiazol-2-yl, isoxazol-3-yl, isoxazol-5-yl, thiazol-2-yl, benzthiazol-2-yl, 1,3,4-thiadiazol-2-yl, imidazol-2-yl, benzimidazol-2-yl, 1,2,3-triazol-2-yl, 1,2,3-triazol-4-yl, 1,2,4-triazol-3-yl, 1,2,4-triazol-5-yl, 2 H-benzotriazol-2-yl, 2 H-naphthotriazol-2-yl, benzo[b]-furan-2-yl, naphtho[2,1-b]-furan-2-yl, benzo[b]-thiophen-2-yl, naphtho[2,1-b]-thiophen-2-yl, pyrimidin-2-yl, pyrridin-2-yl, quinazolin-4-yl or quinazolin-2-yl, if n is 1 or 2, or denotes naphthyl-, stilben-4-yl-, benzo[b]-furan-6-yl, dibenzofuran-3-yl-, dibenzofuran-2-yl, quinoxalin-6-yl-, quinazolin-6-yl- or 2 H-benzotriazol-5-yl, if n is 0,It being po

Abstract: A method for coloring inorganic substrates such as glass beads, glass fibers, mineral wool, rock wool, mineral fiber boards and cloths, concrete molded materials, inorganic pigments and metallic powders, which comprises treating the inorganic substrate with (1) a cationic component comprising(a) a water soluble cationic resin or an aqueous solution of a water soluble cationic resin,(b) an aqueous solution of a water soluble cationic resin and a water soluble cationic dye, or(c) an aqueous dispersion of a water soluble cationic resin, a cationic dispersing agent plus a water insoluble dye or pigment and, optionally, a cationic water soluble dye; andWith (2) an anionic component comprising(d) an aqueous solution of a water soluble anionic dye,(e) an anionic dispersing agent or an aqueous solution of an anionic dispersing agent,(f) an aqueous solution of an anionic dispersing agent and a water soluble anionic dye, or(g) an aqueous dispersion of an anionic dispersing agent plus a water insoluble dye or pigment an

Abstract: A compound of the formula (1) ##STR1## in which X and X' stand for an optionally functionally modified carboxy or sulfo group and wherein the naphthalene nuclei may carry further non- chromophoric substituents and a process for their preparation. These compounds are valuable optical brighteners and can be applied by the methods known in this field.

Abstract: (Pyrazolinylphenylsulfonyl)-piperazines of the formula ##STR1## wherein R.sub.1 is unsubstituted or substituted alkyl, aralkyl or alkenyl, R.sub.2 is unsubstituted or substituted alkyl, aryl or aralkyl R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are certain substituents and Y is an anion, their preparation as well as their use as optical brighteners are disclosed.

Abstract: A brightening composition consisting of a mixture of brighteners and 0 to 99.995% by weight of a commercially available washing agent, said mixture containing at least two brighteners of the formula ##STR1## in which A and B independently of one another denote a radical of the formula ##STR2## in which M represents hydrogen or an ammonium, alkaline earth metal, amine salt or alkali metal ion, as well as a process for brightening organic textiles are disclosed.

Abstract: Security paper which immediately reveals an attempt to alter handwriting thereon by the use of an alkaline ink remover and which is characterized by the incorporation therein of a pyrenesulphonic acid or a metal salt thereof, particularly an alkali metal or alkaline earth metal salt.Security paper incorporating such an acid or salt exhibits a fluorescent coloration when contacted with an alkaline ink remover.

Abstract: Novel 1,4-bis-styryl-phenyl and 4,4'-bis-styryl-biphenyl derivatives, a process for their preparation, a process for optically brightening organic materials on using said compounds as well as detergent compositions containing said compounds are disclosed.

Abstract: Interpolymers from monomers containing optical brightening moieties and solubilizing groups are useful in optical brightening compositions. Photographic elements containing these optical brightening compositions have excellent light stability.

Abstract: Pyrazoline compounds of the formula ##STR1## wherein R represents C.sub.3 -C.sub.20 -alkyl and X, Y and Z independently of one another represent hydrogen, halogen, C.sub.1 -C.sub.4 -alkyl, trifluoromethyl, C.sub.1 -C.sub.4 -alkoxy, aryl or acylamino, are useful as optical brighteners for macromolecular materials.

Abstract: The invention is directed to new benzoxazole-styryls of the formula ##STR1## wherein the rings A, B, C and D can be substituted, as well as processes for their preparation. The invention relates also to a process for optically brightening high-molecular organic materials on using said compounds.

Abstract: Described are aqueous, stable, highly concentrated, finely dispersed, flowable preparations of dyestuffs and optical brighteners insoluble to difficultly soluble in water, which preparations have a low content of dispersing agent and a particle size smaller than 10.mu., particularly smaller than 2.mu.

Abstract: Process for the continuous optical brightening of synthetic polyamide fibre material from organic solvents, whereinA. the fibre material is dry cleaned,B. at least one ionic optical brightener is applied to the material from a solution, emulsion or dispersion in a non-polar organic solvent,C. the material is intermediately dried,D. the optical brightener is developed in a hot aqueous acid bath, andE. the fibre material is subsequently thermofixed.

Abstract: A modifying process for polyester synthetic fiber products wherein said polyester synthetic fiber products are dipped into a treating liquor having an aggregation initiating temperature in the range of 65.degree. - 125.degree. C and then treated by heating them to temperatures at least 1.degree. C higher than said aggregation initiating temperature. Said treating liquor is prepared by adding to an aqueous dispersed liquid of a polyester polyether block copolymer (1) a anion-nonion or nonion surface active agent which serves to improve the high temperature stability of said block copolymer dispersed liquid, (2) an adsorption promoting or aggregation temperature adjusting agent which serves to increase the affinity of said block copolymer to the polyester synthetic fibers and improve the sorption power of said block copolymer and, if desired, (3) dyestuffs and carriers.

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: An improved method for manufacturing a charge image storage dielectric capable of bistable storage is described. The storage dielectric is made by coating phosphor particles with a secondary emissive-forming substance, and then heating the coated particles to form secondary emissive material and simultaneously bond it to the surface of the phosphor particles.

Abstract: The 4,4'-bis-[2",4"-bis-(diisopropanolamino)-s-triazin-6"-yl-amino]-stilbene-2 ,2'-disulphonic acid, its manufacture as well as its use as optical brightener for natural or synthetic polyamides and especially for paper is disclosed.

Abstract: Styrene compounds of the formula ##STR1## wherein Q denotes one of the ring systems of the formulae ##STR2## wherein M represents oxygen or sulphur, Z represents hydrogen, lower alkyl or phenyl and n represents the number 1 or 2 and the rings A and B can each contain 1 to 3 non-chromophoric substituents.

Abstract: New distyryl compounds of the formula ##STR1## WHEREIN R.sub.x denotes an optionally modified sulphonic acid group, a sulphone group, an optionally functionally modified carboxylic acid group or the nitrile group, R.sub.x ' denotes an optionally functionally modified sulphonic acid group, a sulphone group, an optionally functionally modified carboxylic acid group, the nitrile group, alkyl, alkoxy, chlorine or hydrogen, and R.sub.y and R.sub.y ', independently of one another, denote hydrogen, the sulphonic acid group or a salt thereof, chlorine, alkyl or alkoxy; these compounds are particularly useful as optical brighteners.

Abstract: Heterocyclic compounds containing sulpho groups, a process for their preparation as well as a process for optically brightening organic materials on using said compounds are disclosed.

Abstract: A new process for the manufacture of cyano-substituted stilbene compounds, new stilbene compounds as well as their use as fluorescent brighteners or as intermediates for the manufacture of fluorescent brighteners are provided.

Abstract: Agent for the preparation of the baths for brightening the color of and removing the greyness from white and pastel colored textiles which are made from synthetic fibers or which are provided with an easy-care finish and are made from cotton or blends thereof with synthetic fibers, which consists essentially of an organic polymer which is soluble or emulsifiable in water and is a homopolymer of acrylic or methacrylic acid or an ester or amide thereof, a copolymer of acrylic or methacrylic acid or an ester of amide thereof with acrylic or methacrylic acid alkylpolyalkylene glycol ester, a polyvinyl acetate or a water-soluble starch derivative, and a mixture thereof, and a fluorescent brightener which is soluble or dispersible in water.

Abstract: Non-aqueous process for improving a functional property of flexible, natural and synthetic, organic polymeric substrates, such as textiles, film and paper, for example, polyethylene terephthalate or cotton fabric, by applying thereto an agent other than a dye, which agent is capable of imparting the desired improved functional property to the substrate, which process comprises:1. applying said agent to the substrate from a liquid medium;2. optionally, drying the substrate to remove the liquid while substantially retaining the agent on the substrate; and3. contacting the agent-treated substrate with a fluorocarbon fluid at a temperature and for a time sufficient to effect fixation of the agent on the substrate, said fluorocarbon having an atmospheric pressure boiling point of at least 25.degree. C., a fluorine to carbon atom ratio of at least 1.5 and a solubility parameter of not greater than 7.

Abstract: A stable weakly acid or neutral solution of quaternized fluorescent brighteners consisting essentially of a quaternized fluorescent brightener of the formula ##SPC1##Wherein Y.sub.1 represents hydrogen methyl, ethyl, methoxy, halogen or together with Y.sub.2 represents a fused benzene ring, Y.sub.2 represents hydrogen, methyl, ethyl, methoxy, halogen or together with Y.sub.1 or Y.sub.3 represents a fused benzene ring, Y.sub.3 represents hydrogen, methyl, ethyl, alkoxy with 1 to 4 carbon atoms, halogen or together with Y.sub.2 or Y.sub.4 represents a fused benzene ring, Y.sub.4 represents hydrogen, alkyl with 1 to 4 carbon atoms, methoxy, halogen or together with Y.sub.3 represents a fused benzene ring, Y.sub.5 represents hydrogen, alkyl with 1 to 4 carbon atoms or phenyl which is unsubstituted or substituted by methyl and/or methoxy, Y.sub.6 represents hydrogen, alkyl with 1 to 4 carbon atoms, alkylsulphonyl with 1 to 4 carbon atoms, methoxy or halogen, Y.sub.

Abstract: Disclosed are anionic optical brightening agents, such agents being 1,3-diphenyl pyrazolines characterized by having, in the 4- or 5-position of the pyrazoline ring, a sulphoalkyl substituent, their production and use.

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.