Use of dispersions of crosslinked cationic starch in papermaking

Starch dispersions comprising discrete particles of crosslinked cationic starch in an aqueous liquid can be used in papermaking. They can be used as a wet-end additive or in surface coating. The starch dispersions can be prepared by a process comprising: (a) obtaining a mixture of cationic starch an...

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Bibliographic Details
Main Authors HELBLING, ANDRE MARCEL, HILLS, MICHAEL ROBERT, STOLLMAIER, FRIEDERIKE THERESIA
Format Patent
LanguageEnglish
French
German
Published 30.01.2002
Edition7
Subjects
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
DERIVATIVES THEREOF
GENERAL PROCESSES OF COMPOUNDING
IMPREGNATING OR COATING OF PAPER
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PAPER NOT OTHERWISE PROVIDED FOR
PAPER-MAKING
POLYSACCHARIDES
PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D
PRODUCTION OF CELLULOSE
PULP COMPOSITIONS
TEXTILES
THEIR PREPARATION OR CHEMICAL WORKING-UP
TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
WORKING-UP
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Summary:Starch dispersions comprising discrete particles of crosslinked cationic starch in an aqueous liquid can be used in papermaking. They can be used as a wet-end additive or in surface coating. The starch dispersions can be prepared by a process comprising: (a) obtaining a mixture of cationic starch and an aqueous liquid, (b) processing the mixture using shear forces in the presence of a crosslinker; and (c) adding and mixing in a hydroxylic liquid to obtain the starch dispersions.
Bibliography:Application Number: EP20000115870