Method for producing blends consisting of polystyrene and of a cross-linked polyvinyl pyrrolidone having a reduced styrene residual monomer content

US7868093B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Klemens Mathauer · Ludwigshafen, DE
• Marianna Pierobon · Ludwigshafen, DE
• Tobias Petsch · Morbach, DE
• Karl-Otto Heilmann · Eisenberg, DE
• Michael Kerber · Cleveland Heights, US
• Robert Bayer · Sinsheim, DE

Key dates

• Filing date: Mar 14, 2006
• Grant date: Jan 11, 2011
• Expiry date: Oct 19, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2312/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Process for removal of residual styrene monomers from polystyrene and from blends comprising water-insoluble, crosslinked polyvinylpyrrolidone, via treatment with water, which comprises carrying out the treatment on a particulate solid blend.