The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 13, 2015
Filed:
May. 24, 2012
Eckhard Stroefer, Mannheim, DE;
Otto Machhammer, Mannheim, DE;
Stefan Bitterlich, Dirmstein, DE;
Roman Prochazka, Mannheim, DE;
Mario Emmeluth, Bensheim, DE;
Julia Leschinski, Ixelles, BE;
Emmanouil Pantouflas, Weinheim, DE;
Dirk Klingler, Mannheim, DE;
Stephan Deuerlein, Ludwigshafen, DE;
Stephan Schunk, Heidelberg, DE;
Jochem Henkelmann, Ludwigshafen, DE;
Dieter Stützer, Dudenhofen, DE;
Eckhard Stroefer, Mannheim, DE;
Otto Machhammer, Mannheim, DE;
Stefan Bitterlich, Dirmstein, DE;
Roman Prochazka, Mannheim, DE;
Mario Emmeluth, Bensheim, DE;
Julia Leschinski, Ixelles, BE;
Emmanouil Pantouflas, Weinheim, DE;
Dirk Klingler, Mannheim, DE;
Stephan Deuerlein, Ludwigshafen, DE;
Stephan Schunk, Heidelberg, DE;
Jochem Henkelmann, Ludwigshafen, DE;
Dieter Stützer, Dudenhofen, DE;
BASF SE, Ludwigshafen, DE;
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.