Ciba-geigy Corporation

Ciba Specialty Chemicals Corporation

Basf Se Corporation

Clariant International Ltd

Peter Rohringer

Georges Metzger

Hermann Nachbur

Michael Bernheim

Dieter Reinehr

Hubert Meindl

Armin Hiestand

Hans Wegmuller

Fabienne Cuesta

Rainer Hans Traber

Josef Zelger

Dieter Werthemann

Thomas Engelhardt

Ian J Fletcher

Ted Deisenroth

Andreas Burkhard

Erwin Marti

Werner Schreiber

Goetz Scheffler

Marc Roger Grienenberger

Thomas Ehlis

Rudolf Zink

Rosemarie Topfl

Victor Paul Eliu

Horst H Jager

Peter Mockli

Peter Hofmann

Christophe Bulliard

Rudolf F Wurster

Dieter Strasilla

Robert Hochberg

Bernardo De Sousa

Robert Cockcroft

Frank Lohmann

Andr&eacute; Geoffroy

Serge Hauger

Rene Berini

Andre Geoffroy

Karla Ann Wilzer

Brigitte Gerhild Sereinig

Peter Ruf

Julia V&ouml;lkel

Roger Wolfgang Basler

Ren&eacute; Schlatter

Olli Juhani Jokinen

Roland Naef

Winfried Steffen

André Geoffroy

Ian John Fletcher

The invention relates to a composition comprising a) at least one water-soluble fluorescent whitening agent, b) a polymer formed from an ethylenically unsaturated monomer or monomer blend, characterized in that at least one monomer is acrylamide and the water-soluble polymer has an average (weight average) molecular weight of between 500 and 49,000, optionally, c) polyethylene glycol with a weight average molecular weight of between 500 and 6000 and d) water and the use of the composition for the fluorescent whitening of paper in coating and size press or film press applications.

Compositions of fluorescent whitening agents

The present invention relates to a fluorescent whitening agent comprising a mixture of two symmetrically and one asymmetrically substituted triazinylaminostilbene disulphonic acids, certain novel derivatives, a process for their preparations and use of the mixture for whitening synthetic or natural organic materials, especially paper and for the fluorescent whitening and improvement of sun protection factors of textile materials.

Triazinylaminostilbene disulphonic acid mixtures

The present invention provides novel bis-triazinylaminostilbene amphoteric fluorescent whitening agents, comprising both individual components and mixtures thereof, a process for their preparation, intermediates useful for their preparation and use of the fluorescent whitening agents for the fluorescent whitening of paper.

Amphoteric fluorescent whitening agents

The present invention relates to a fluorescent whitening agent comprising a mixture of two symmetrically and one asymmetrically substituted triazinylaminostilbene disulphonic acids, novel asymmetrically substituted derivatives, a process for their preparations and use of the mixture for whitening synthetic or natural organic materials, especially paper and for the fluorescent whitening and improvement of sun protection factors of textile materials.

The present invention provides novel bis-triazinylaminostilbene amphoteric fluorescent whitening agents, comprising both individual components and mixtures thereof, a process for their preparation, intermediates useful for their prepartion and use of the fluorescent whitening agents for the fluorescents whitening of paper.

The use of whitening pigments comprising (a) a melamine-formaldehyde or phenol-formaldehyde polycondensation product and (b) a water-soluble fluorescent whitening agent of formula (1), wherein R and R are each independently of the other &mdash;OH, &mdash;Cl, &mdash;NH , &mdash;O&mdash;C -C alkyl, &mdash;O&mdash;aryl, &mdash;NH&mdash;C -C alkyl, &mdash;N(C -C alkyl) , &mdash;N(C -C alkyl)(C -C hydroxyalkyl), &mdash;N(C -C hydroxyalkyl) , or &mdash;NH&mdash;aryl, for example aniline-mono- or -di-sulfonic acid or an anilinesulfon-amide, morpholino, S&mdash;C -C alkyl(aryl), or a radical of an amino acid, for example aspartic acid or inimoacetic acid, which radical is substited at the amino group, and M is hydrogen; sodium; potassium; calcium; magnesium; ammonium; mono-, di-, tri- or tetra-C -C alkylammoniun; mono-, di- or tri-C -C hydroxyalkylammonium; or ammonium di- or tri-substitue by a mixture of C -C alkyl and C -C hydroxyalkyl groups, for whitening paper coating compositions.

Use of whitening pigments for whitening paper coating compositions

The present invention relates to compounds having formula ( ): wherein each R represents, independently, a linear C -C -alkylene residue which is unsubstituted or substituted by hydroxy, C -C -alkyl, C -C -alkoxy, C -C -hydroxy- or alkoxy-alkoxy, &mdash;OCOM, &mdash;OCOC -C -alkyl, or an amino acid residue from which a hydrogen atom on the amino group has been removed; each R represents, independently, a linear C -C -alkylene residue which is unsubstituted or substituted by hydroxy, C -C -alkyl, C -C -alkoxy, C -C -hydroxy- or alkoxy-alkoxy, &mdash;OCOM, &mdash;OCOC -C -alkyl, &mdash;CO M, CO C -C -alkyl SO M or phenoxy which is unsubstituted or substituted by halogen, C -C -alkyl or C -C -alkoxy, &mdash;CO M or CO C -C -alkyl, NH or mono- or disubstituted amino; or phenyl which is unsubstituted or substituted by 1 to 3 SO M, SO NHC -C -alkyl, &mdash;SO NH , &mdash;CO M, &mdash;CO M, &mdash;CO C -C -alkyl, &mdash;CONH , &mdash;CONHC -C -alkyl, &mdash;NHCOC -C -alkyl or mono- or disubstituted amino groups; each R represents independently, hydrogen, C -C -alkyl, halogen, cyano, SO M, &mdash;SO NH , SO NHC -C -alkyl, &mdash;CO M, &mdash;CO C -C -alkyl, &mdash;CONH , &mdash;CONHC -C -alkyl, or &mdash;NHCOC -C -alkyl; M is hydrogen, an alkali metal atom, ammonium or a cation formed from an amine and m is an integer of 1 to 3, a process for their preparation and use of the compounds as optical brightening agents for synthetic or natural organic materials or for removing stain in photographic materials.

Triazinylaminostilbene derivative as fluorescent whitening agents

Stable formulations of fluorescent whitening agents are described. These contain a) 2 to 20% by weight of a fluorescent whitening agent of formula (1) in which R is hydrogen, C -C -alkyl, C -C -alkoxy or halogen and M is hydrogen, an alkali metal, ammonium or magnesium, b) 4 to 30% by weight of an unmodified or modified polyvinyl alcohol, c) 55 to 94% by weight of water and d) 0 to 20% weight of further additives, polyethylene glycol being excluded. A process for the preparation of the formulations and their use for whitening paper materials is also described.

Formulations of fluorescent whitening agents

Fluorescent whitening agents

A simplified method for the optical brightening of paper either in the pulp mass, the size or metering press or by coating by the use of a formulation of an optical brightening agent together with a swellable layered silicate.

Method for optically brightening paper

Process for the preparation of stilbene compounds

The present invention provides a hydrate of the 4,4&prime;-di-triazinylamino-2,2&prime;-di-sulfostilbene compound having the formula:

Triazinylaminostilbene compounds

A process for the preparation of sulphonated distyryl-biphenyl compounds of formula (1), in which R,and R,, independently, are hydrogen, C,-C,-alkyl, C,-C,-alkyl or halogen, and M represents Li, K, an alkaline earth metal or ammonium, characterized by, firstly, reacting a compound of formula (2) with a di- or trialkylamine containing 6-12 carbon atoms in each alkyl group, in a two-phase system consisting of strong aqueous mineral acid and a water immisicible organic solvent and, secondly, reacting the resulting lypophilic ammonium salt with LiOH, KOH, an alkaline earth metal hydroxide, ammonia, a mono-, di- or trialkylamine or a tetraalkylammonium hydroxide, all containing 1-4 carbon atoms in each alkyl group; mono-, di- or tri(C,-C,)alkanolamine, morpholine, piperdine or pyrrolidine.

Process for the preparation of sulphonated distyryl-biphenyl compounds

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Schönenbuch, Switzerland

Peter Rohringer