Patent Number: 6,310,132

Title: Sizing agents for paper

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.

Inventors: Sackmann; Gunter (Leverkusen, DE), Wenz; Eckhard (Koln, DE), Konig; Joachim (Odenthal, DE), Jansen; Bernhard (Koln, DE), Roick; Thomas (Leverkusen, DE), Thiele; Bernd (Odenthal, DE), Kijlstra; Johan (Leverkusen, DE)

Assignee: Bayer Aktiengesellschaft

International Classification: C08F 2/12 (20060101); C08F 2/24 (20060101); C08F 251/00 (20060101); D21H 21/16 (20060101); D21H 21/14 (20060101); C08F 002/20 (); C08F 002/24 (); C08F 220/00 (); C08L 035/00 (); C08L 075/04 ()

Expiration Date: 10/30/2018