Multistage emulsion polymer

US6552116B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Joachim Pakusch · Ludwigshafen, DE
• Uwe Dittrich · Schifferstadt, DE
• Harald Röckel · Neustadt, DE
• Alan E. Smith · Dover, US
• Erich Gulbins · Heidelberg, DE
• Li Zhuo · Shanghai, CN

Key dates

• Filing date: Nov 2, 2000
• Grant date: Apr 22, 2003
• Expiry date: Nov 2, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F265/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A multi-stage emulsion polymer containing at least one first domain having a glass transition temperature Tg of from −10 to +40° C. and at least one second domain having a Tg of from +50 to 120° C., the weight ratio of the first domain to the second domain being within the range from 90:10 to 50:50. The first and/or the second domain containing from 0.1 to 10% by weight of a nitrogen-coutaining adhesion monomer and the first domain containing at least 10% by weight of vinyl aromatic compounds and/or the second domain containing at least 15% by weight of vinyl aromatic compounds and/or C4 to C12 alkylmethacrylates.