Production of foam webs from high-temperature-resistant polysulfones or polyether sulfones

US7045082B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Franz-Josef Dietzen · Haßloch, DE
• Dietrich Scherzer · Neustadt, DE
• Joachim Queisser · Mannheim, DE
• Swen Ruck · Worms, DE
• Gerd Ehrmann · Deidesheim, DE
• Wolfgang Kratzmuller · Kassel, DE

Key dates

• Filing date: Dec 16, 2002
• Grant date: May 16, 2006
• Expiry date: Dec 24, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2321/00
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a process for producing foam webs by foam extrusion of a mixture of a polysulfone or polyether sulfone and a volatile blowing agent, where the blowing agent is water or a mixture of water with an inert gas or organic liquid, e.g. an alcohol or a ketone.