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AssigneesAkzo Nobel N.V., Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
InventorsMathias Hahn, Werner Jaeger, Andre Laschewsky, Bernd Paulke, Christian Przybyla, Achim Sieger
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The invention relates to a process for preparing an aqueous polymer dispersion comprising reacting, in the presence of a polymeric cationic co-stabiliser (A), one or more monomers (m), and a polymer (B) of a monomer mixture comprising at least one monomer (x) having a primary, secondary or tertiary amine or amide group and at least one olefinic unsaturation, and, at least one catonic monomer (y) having at least one olefinic unsaturation. The invention also relates to a polymer dispersion, a process for preparing a polymeric stabiliser (C), a polymeric stabiliser (C) and a process for producing paper.
Process for preparing a polymer dispersion comprising reacting, in the presence of a polymeric cationic co-stabiliser (A), one or more-monomers (m), and a polymer (B) of a monomer mixture comprising at least one monomer (x) having a primary, secondary or tertiary amine or amide group and at least one olefinic unsaturation, and, at least one cationic monomer (y) having at least one olefinic unsaturation, if a monomer having an amide group is used, the polymer has been hydrolysed to convert the amide functionality into an amine functionality.
Polymer dispersion comprising:
Polymeric stabiliser (C) being a graft copolymer, its backbone comprising, in polymerised form, a cationic monomer (y) having at least one olefinic unsaturation and a monomer (x) having a primary, secondary or tertiary amine group, and at least one olefinic unsaturation, its grafted branches comprising, in polymerised form, one or more monomers (m).
Process for preparing a polymeric stabiliser (C) comprising:
Dependencies are inferred from the claim text.