Compressed, rigid polyurethane foams

US6472449B1 · kind B1 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Torsten Heinemann · Tarragona, ES
• Karl Werner Dietrich · Odenthal, DE
• Walter Klan · Leverkusen, DE

Key dates

• Filing date: Oct 12, 2001
• Grant date: Oct 29, 2002
• Expiry date: Oct 12, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2375/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Compressed polyurethane or polyisocyanurate foams useful as support materials for vacuum insulation units are produced by compressing an open-cell rigid polyurethane or polyisocyanurate to 5-95% of its original volume after 80-200% of the fiber time.