Other

Bayer Aktiengesellschaft

Kemira Oyj

Bernhard Hunke

Heinz Giesecke

Siegfried Korte

Ulrich Feldhues

Udo Eckstein

Thomas Roick

G&uuml;nter Sackmann

Bernd Hauschel

Reiner Gottschalk

Hans-Peter Geiger

Claudia Hundertmark

Karl-Heinz Drenker

A process for whitening paper in a size press includes contacting a cellulose sheet with a size press liquor that contains a surface size and a particular whitener containing sulfonate groups and cations, M, wherein at least 10% of all cations M have the formula in which Rto R, independently of one another, denote hydrogen, a C-C-alkyl radical or an optionally further substituted C-C-hydroxyalkyl radical, and Rdenotes an optionally further substituted C-C-hydroxyalkyl radical. The process provides superior paper whitening compared to a corresponding process in which the whitener cations are all sodium or potassium ions.

Alkanolammonium-containing triazinyl flavonate whiteners

The use of optical brighteners of the formula (II): in which and the other substituents have the meaning stated in the description, for brightening aqueous coating slips comprising at least one latex binder and at least one synthetic co-binder differing therefrom.

Use of brighteners for the preparation of coating slips

Whitened polymers and the use thereof in coating slips for coating substrates

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Eitorf, Germany

Bernhard Hunke