Polymer and its preparation and use

The present invention relates to a water-soluble cationic acrylamide-based polymer having one or more acetoacetate groups. The invention also relates to a method for producing the water-soluble polymer which comprises polymerizing ethylenically unsaturated monomers in an aqueous phase, wherein the m...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	RESTORP PER ANDERS, ENGSTROM ULF JONAS ANDERS
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON IMPREGNATING OR COATING OF PAPER MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING 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
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Beschreibung
Zusammenfassung:	The present invention relates to a water-soluble cationic acrylamide-based polymer having one or more acetoacetate groups. The invention also relates to a method for producing the water-soluble polymer which comprises polymerizing ethylenically unsaturated monomers in an aqueous phase, wherein the monomers comprise (a) (meth)acrylamide, (b) ethylenically unsaturated cationic monomer, (c) ethylenically unsaturated monomer having one or more acetoacetate groups, and (d) optionally other ethylenically unsaturated monomer. The invention further relates to the use of the water-soluble polymer as a strength agent in the production of paper and board. The invention further relates to a process for producing paper and board which comprises providing an aqueous cellulosic suspension, adding to the suspension water-soluble polymer having one or more ketone groups, and dewatering the obtained suspension. The invention further relates to paper and board comprising the water-soluble polymer of the invention, as well as paper and board produced by the process of the invention.