Clariant Finance (Bvi) Limited

Archroma IP Gmbh

Clariant International Ltd

Andrew Clive Jackson

John Martin Farrar

David Puddiphatt

Cedric Klein

Alec Stewart Tindal

Cédric Klein

Frederic Reveaud

Margaret Mahon

David Atkinson

Martin Oberholzer

Mark David Graham

Mariela Gauto

Nicholas Philip Lock

The instant invention relates to mixed salts of optical brighteners of formula (1), wherein M represents a mixture of Mgwith another cation, which provide for superior optical brightening effects when applied to the surface of paper.

Optical brightening compositions

Concentrated storage stable aqueous solutions (S) comprising components (a), (b) and (c), wherein component (a) is at least one optical brightening agent of formula (1), in which the anionic charge on the brightener is balanced by a cationic charge composed of one or more cations selected from the group consisting of hydrogen, alkali metal cation, alkaline earth metal cation, ammonium, ammonium which is mono-, di- or trisubstituted by a Clinear or branched alkyl radical and ammonium which is mono-, di- or trisubstituted by a Clinear or branched hydroxyalkyl radical, and the concentration of component (a) is 0.08 to 0.3 mol per kg, based on the total weight of the concentrated storage-stable aqueous solutions (S), component (b) is at least one inorganic salt (SA), in a concentration of 2 to 15% by weight, based on the total weight of the concentrated storage-stable aqueous solutions (S), and component (c) is water, in a concentration of 10% to 88% by weight, based on the total weight of the concentrated storage-stable aqueous solutions (S).

Concentrated storage-stable aqueous optical brightening solutions

The instant invention relates to improved liquid sizing compositions comprising derivatives of diaminostilbene, binders, protective polymers and divalent metal salts for the optical brightening of substrates suitable for high quality ink jet printing.

Optical brightening compositions for high quality ink jet printing

The instant invention relates to novel water soluble bis-(triazinylamino)-stilbene optical brightening agents, a process for their preparation and their use for whitening natural and synthetic materials.

Bis-(triazinylamino)-stilbene derivatives

The instant invention relates to storage stable solutions of optical brighteners based on certain salt forms of anilino-substituted bistriazinyl derivatives of 4,4'-diaminostilbene-2,2&#x2032;-disulphonic acid and of organic acids which do not need extra solubilizing additives.

Storage stable solutions of optical brighteners

The instant invention relates to storage stable aqueous solutions of stilbene optical brighteners with polyvinyl alcohols which can be directly used by the papermaker in that they may be diluted with water and/or be metered directly into a coating composition, to provide coated papers of a particularly high whiteness.

Aqueous solutions of optical brighteners

A sizing composition for paper, characterised in that the sizing composition comprises 

The instant invention relates to storage stable solutions of optical brighteners based on certain salt forms of anilino-substituted bistriazinyl derivatives of 4,4'-diaminostilbene-2,2&#x2032;-disulphonic acid which do not need extra solubilising additives.

The instant invention relates to stilbene optical brightening agents which combine a high solubility in water while providing superior fluorescent whitening effects when applied to the surface of paper in either the size-press or in a pigmented coating composition and which show a reduced anionic charge. The instant optical brighteners may also be used for finishing of textiles.

Optical brightening agents

The present invention relates to the use of compounds of formula (I) wherein all substituents are as defined in the claims as optical brighteners as well as to new mixtures of optical brighteners.

Optical brighteners

Water soluble, amphoteric optical brighteners (W) comprising at least one brightener-characteristic radical X which contain at least one anionic substituent and covalently linked over at least one tertiary amino group Z to at least one non-chromophoric, essentially aliphatic, polyquaternary ammonium-hydrocarbon radical Y containing more than one quaternary ammonium group and in which each hydrocarbon radical is optionally interrupted by and/or substituted with one or more further heteroatoms, have surprising brightening properties, especially in papermaking, and in the form of their aqueous solutions are of notable stability.

Amphoteric optical brighteners, their aqueous solutions, their production and their use

Cationically modified white pigments (W) in particulate form, essentially consisting of a particulate inorganic white pigment (M) of a particle size in the range of 0,1 to 40 &#x3bc;m and an applied water soluble, cationic, crosslinked polymer (P) containing quaternary ammonium groups in salt form, obtainable by reaction of epichlorohydrin or of epichlorohydrin derivatives or precursors with amines, under conditions leading to at least partial crosslinking, optionally in combination with an anionic optical brightener (B) and where the molar ratio of (B) to (P) is such that the number of cationic charges of the total polymer (P) is higher than the number of anionic charges of the total anionic optical brightener (B), are surprisingly useful as cationic white pigments in various fields of technique, especially in papermaking.

Cationically modified white pigments, their production and use

The invention relates to an optical brightener mixture (W) comprising optical brighteners (A) of formula (Ia), and (B) of formula (Ib) and optionally (C) of formula (Ic) as defined herein, their concentrated aqueous solutions (S), their production and their use.

Optical brighteners compositions their production and their use

Aqueous solutions of polycationic polymers (P ) containing quaternary ammonium groups in salt form as heteroatomic chain members or ring members of the polymer, wherein a part of the counter-ions to the quaternary cationic groups are anionic groups of anionic optical brighteners, containing at least one anionic group, are valuable multi-functional agents in papermaking.

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Harrogate, United Kingdom

Andrew Clive Jackson