Method for producing expandable polystyrene particles

US6444714B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Guiscard Glück · Mainz, DE
• Franz-Josef Dietzen · Haßloch, DE
• Klaus Hahn · Lampertheim, DE
• Gerd Ehrmann · Deidesheim, DE

Key dates

• Filing date: Jun 11, 2001
• Grant date: Sep 3, 2002
• Expiry date: Jun 11, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2325/04
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process for preparing expandable particulate styrene polymers wherein from 5 to 50% by weight of expanded graphite and also, if desired, from 2 to 20% by weight of a phosphorus compound, are present as flame retardants, by suspension polymerization of styrene in the presence of the flame retardants.