Expandable styrene polymers containing recycled material

US5596045A · kind A · utility

Assignee

• BASF SE

Inventors

• Dietrich Scherzer · Neustadt, DE
• Wolfram Husemann · Neustadt, DE
• Michael Witt · Ludwigshafen, DE
• Klaus Hahn · Lampertheim, DE
• Knut Kaempfer
• Gerhard Alicke · Worms, DE

Key dates

• Filing date: Oct 26, 1995
• Grant date: Jan 21, 1997
• Expiry date: Oct 26, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/62
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Expandable styrene polymers containing recycled polystyrene have a content of recycled material of up to 40% by weight, based on the total weight of the polystyrene, wherein, in the course of the polymerization of the reaction mixture, from 100 to 500 ppm of a molecular weight regulator and/or from 0.05 to 1.0% by weight, based in each case on the polymerization solution, of a finely divided polyethylene wax are added.