Method for producing emulsion polymers

US7943704B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Konrad Roschmann · Ladenburg, DE
• Arno Tuchbreiter · Speyer, DE
• Ekkehard Jahns · Weinheim, DE
• Joerg Leuninger · Mainz, DE
• Bernhard Schuler · Austin, US
• Oliver Wagner · Ludwigshafen, DE
• Michaela Reinsch · Neustadt, DE
• Robert Wrazidlo · Ellerstadt, DE

Key dates

• Filing date: Jul 10, 2006
• Grant date: May 17, 2011
• Expiry date: Jan 2, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S525/902
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention provides a process for preparing emulsion polymer particles of a hollow core/shell structure in the presence of a monomer plasticizer having a ceiling temperature less than 181° C. wherein a polymerization inhibitor or reducing agent is not added to the aqueous emulsion of the core shell particles during the neutralization and swelling stage. The obtained core shell particles are useful in paints, paper coatings, foams, and cosmetics.