Process for preparing polyisocyanates from biomass

US8933262B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Eckhard Stroefer · Mannheim, DE
• Otto Machhammer · Mannheim, DE
• Stefan Bitterlich · Dirmstein, DE
• Roman Prochazka · Mannheim, DE
• Mario Emmeluth · Bensheim, DE
• Julia Leschinski · Mannheim, DE
• Emmanouil Pantouflas · Weinheim, DE
• Dirk Klingler · Mannheim, DE
• Stephan Deuerlein · Ludwigshafen, DE
• Stephan Schunk · Heidelberg, DE
• Jochem Henkelmann · Mannheim, DE
• Dieter Stützer · Marloffstein, DE

Key dates

• Filing date: May 24, 2012
• Grant date: Jan 13, 2015
• Expiry date: Nov 10, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C263/10
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing polyisocyanates from natural raw material sources, in which a composition comprising low molecular weight aromatics which comprise at least one hydroxy group or at least one alkoxy group per molecule (oxyaromatics) is produced from a biomass material, these oxyaromatics are converted into the corresponding aromatic amines and, optionally after condensation with formaldehyde, reacted further with phosgene to give compounds comprising isocyanate groups.