Clariant Finance (bvi) Limited

Archroma IP Gmbh

International Paper Company

Clariant International Ltd

David Puddiphatt

Andrew Clive Jackson

Benny J Skaggs

Cédric Klein

Cedric Klein

Heidrun Grether-Schene

Frederic Reveaud

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

Aqueous coating composition for shading substrates, preferably paper, comprising 

Aqueous compositions for whitening and shading in coating applications

Aqueous coating composition for optical brightening and shading of substrates comprising

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

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Bradford, United Kingdom

David Puddiphatt