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:
Apr. 24, 2012
Filed:
Dec. 22, 2006
Veit Stegmann, Mannheim, DE;
Klemens Massonne, Bad Duerkheim, DE;
Matthias Maase, Speyer, DE;
Eric Uerdingen, Speyer, DE;
Michael Lutz, Speyer, DE;
Frank Hermanutz, Leonberg, DE;
Frank Gaehr, Esslingen, DE;
Veit Stegmann, Mannheim, DE;
Klemens Massonne, Bad Duerkheim, DE;
Matthias Maase, Speyer, DE;
Eric Uerdingen, Speyer, DE;
Michael Lutz, Speyer, DE;
Frank Hermanutz, Leonberg, DE;
Frank Gaehr, Esslingen, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A solution system for biopolymers in the form of carbohydrates based on a molten ionic liquid, additives optionally being contained in the solution system, is described. This solution system contains a protic solvent or a mixture of several protic solvents, and in the case where the protic solvent is solely water, this is present in the solution system in an amount of more than about 5 wt. %. Carbohydrates can be incorporated into the solution system, in particular in the form of starch, cellulose and derivatives thereof, and it can then be used for regeneration of the carbohydrates contained therein. A particularly advantageous process for the preparation of the solution system containing the carbohydrates and for the preparation of regenerated carbohydrates, in particular in the form of regenerated cellulose fibers, is moreover described. The invention accordingly also provides such spun fibers as are distinguished in that they are non-fibrillating. The invention offers in particular economic advantages over the systems of the prior art.