Process for producing a foamed material,composition in the form of emulsion used therein and foamed material obtainable therefrom

US9403958B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Stefan Lindner · Friesenheim, DE
• Wolfgang Friederichs
• Reinhard Strey · Dormagen, DE
• Elena Khazova · Mannheim, DE
• Thomas Sottmann
• Diana Engelen · Leverkusen, DE
• Agnes Chalbi · Bad Mergentheim, DE

Key dates

• Filing date: Nov 4, 2011
• Grant date: Aug 2, 2016
• Expiry date: Dec 5, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/01
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to a process for producing a foamed material, wherein a composition in the form of emulsion with a matrix-forming component, a surfactant component and a near-critical or supercritical blowing agent component is submitted to a lowering of pressure. The blowing agent component further comprises a hydrophobic co-component, which is soluble in supercritical CO2 at a pressure of ≧150 bar, is insoluble in subcritical CO2 at a pressure of ≦40 bar and is insoluble in the matrix-forming component and furthermore is present in a proportion from ≧3 wt % to ≦35 wt % of the blowing agent component. It further relates to a composition in the form of emulsion to be used herein and a foamed material obtainable by the process according to the invention.