Production of expandable styrene polymers

US5908872A · kind A · utility

Inventors

• Guiscard Glück · Mainz, DE
• Klaus Hahn · Lampertheim, DE
• Achim Löffler · Speyer, DE
• Maria Lorenz · Ludwigshafen, DE

Key dates

• Filing date: Oct 16, 1998
• Grant date: Jun 1, 1999
• Expiry date: Oct 16, 2018

Classification

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

Abstract

In a process for producing expandable styrene polymers containing graphite particles by polymerization of styrene in aqueous suspension in the presence of two peroxides which decompose at different temperatures, the peroxide which decomposes at lower temperature is multifunctional and on decomposition forms two or more linked polymer chains.