Sizing agents for paper

US6310132A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Gunter Sackmann · Leverkusen, DE
• Eckhard Wenz · Neunburg vorm Wald, DE
• Joachim Konig
• Bernhard Jansen · Cologne, DE
• Thomas Roick · Leverkusen, DE
• Bernd Thiele · Odenthal, DE
• Johan Kijlstra · Odenthal, DE

Key dates

• Filing date: Dec 15, 1998
• Grant date: Oct 30, 2001
• Expiry date: Dec 15, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F251/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

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.