Process for preparing bead polymers with an average particle size in the range from 1 to 40 &mgr;M, moulding compositions comprising bead polymer, and mouldings and PAMA plastisols

US6809163B2 · kind B2 · utility

Assignee

• ROEHM GMBH & CO. KG · DE

Inventors

• Klaus Schultes · Wiesbaden, DE
• Thomas Suefke · Langen (Hessen), DE
• Markus Parusel · Messel, DE
• Guenter Schmitt · Darmstadt, DE
• Winfried Belzner · Zöblitz, DE

Key dates

• Filing date: Dec 28, 2001
• Grant date: Oct 26, 2004
• Expiry date: Jun 16, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2/24
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention provides a process for preparing bead polymers having an average particle size of 1 to 40 &mgr;m, which includes:contacting:at least one polymerizable mix which includes at least 50% by weight of at least one (meth)acrylate monomer,at least one aluminum compound, andan aqueous phase,to prepare a mixture;dispersing the mixture at a shear rate≧103 s−1 to form a dispersion, wherein the dispersion is stabilized by the aluminum compound; andpolymerizing to produce bead polymers having an average particle size of 1 to 40 &mgr;m.