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:
Aug. 16, 2016
Filed:
Oct. 22, 2012
Joachim Schulze, Soest, DE;
Rainer Hagen, Berlin, DE;
Wolfgang Tietz, Biendorf, DE;
Shashank Ghanegaonkar, Leipzig, DE;
Joachim Schulze, Soest, DE;
Rainer Hagen, Berlin, DE;
Wolfgang Tietz, Biendorf, DE;
Shashank Ghanegaonkar, Leipzig, DE;
Udo Mühlbauer, Berlin, DE;
Willi Techlin, Berlin, DE;
THYSSENKRUPP INDUSTRIAL SOLUTIONS AG, Essen, DE;
UHDE INVENTA-FISCHER GMBH, Berlin, DE;
Abstract
Disclosed is a test and test apparatus used to determine whether lactic acid is suitable for polymerization. The test apparatus comprises a) means for the polycondensation of the lactic acid to form a pre-polymer, b) means for depolymerization of the prepolymer to form dilactide, and c) means for carrying out analytical methods to determine at least one of the dilactide yield and/or the racemization, wherein lactic acid which is suitable for polymerization exhibits a dilactide yield of >90% and a racemization of <5%.