Process for preparing filterable polystyrene dispersion

US5763551A · kind A · utility

Assignee

• BASF SE

Inventors

• Josef Wunsch · Schifferstadt, DE
• Lembit Tuttelberg · Mannheim, DE
• Fritz Heinrich · Ludwigshafen, DE
• Siegbert Brand · Birkenheide, DE

Key dates

• Filing date: Aug 26, 1997
• Grant date: Jun 9, 1998
• Expiry date: Aug 26, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/909
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Particulate, filterable polystyrene formulations are obtained by anionic polymerization of styrene in nonaqueous dispersion if the polymerization is carried out in an aliphatic hydrocarbon as the dispersing medium and with a styrene/diene/styrene three-block copolymer, for example based on polybutadiene or polyisoprene, as the dispersant.