Sizing agents for paper
AssigneeBayer Aktiengesellschaft
InventorsGünter Sackmann, Eckhard Wenz, Joachim König, Bernhard Jansen, Thomas Roick, Bernd Thiele, Johan Kijlstra
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Abstract
This invention relates to novel aqueous emulsion polymers obtained by free-radical initiated addition polymerization of at least one monomer in the presence of degraded starch and at least one polymeric emulsifier from the series of sulfo-containing maleic anhydride copolymers and/or sulfo-containing oligourethanes with a branched molecular structure. The invention further relates the use of such emulsion polymers as surface sizing agents for paper and paperlike materials.
Claims8
An aqueous emulsion polymer obtained by free-radically initiated addition polymerization of at least one monomer in the presence of (1) degraded starch and (2) at least one polymeric emulsifier selected from the group consisting of (i) sulfo-containing maleic anhydride copolymers and/or terpolymers, (ii) sulfo-containing oligourethanes having a branched molecular structure, and (iii) mixtures thereof.
Dependencies are inferred from the claim text.