Optisches Aufhellen von Papier

Accordingly, the present invention provides a method for the fluorescent whitening of paper comprising contacting the paper surface with a coating composition comprising a fluorescent whitening agent having the formula: wherein M is hydrogen, an alkali metal, preferably sodium, ammonium or magnesium...

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Bibliographic Details
Main Authors ROHRINGER, PETER, EHLIS, THOMAS, ZELGER, JOSEF
Format Patent
LanguageGerman
Published 02.09.1999
Edition6
Subjects
IMPREGNATING OR COATING OF PAPER
PAPER NOT OTHERWISE PROVIDED FOR
PAPER-MAKING
PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D
PRODUCTION OF CELLULOSE
PULP COMPOSITIONS
TEXTILES
TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
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Summary:Accordingly, the present invention provides a method for the fluorescent whitening of paper comprising contacting the paper surface with a coating composition comprising a fluorescent whitening agent having the formula: wherein M is hydrogen, an alkali metal, preferably sodium, ammonium or magnesium; or comprising contacting the paper in the size press with a combination of the compound of formula (1) and an auxiliary selected from a sequestering agent and a dispersing agent and/or an emulsifier.
Bibliography:Application Number: DE19946016716T