Bead-form expandable styrene polymers having a high expansion capacity

US5104903A · kind A · utility

Assignee

• BASF SE

Inventors

• Klaus Hahn · Lampertheim, DE
• Uwe Guhr · Havelsee, DE
• Hans Hintz · Ludwigshafen, DE
• Rolf Richter · East Greenwich, US

Key dates

• Filing date: Jun 4, 1990
• Grant date: Apr 14, 1992
• Expiry date: Jun 4, 2010

Classification

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

Abstract

Bead-form expandable styrene polymers containing a styrene polymer having a mean molecular weight (weight average) of less than 130.multidot.10.sup.3 and a steep high-molecular-weight flank of the molecular-weight distribution curve, and 0.15 to 1.5 mol of a C.sub.3 - to C.sub.6 -hydrocarbon as blowing agent, and, if desired, customary additives in effective amounts, are distinguished by a particularly high expansion capacity.