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:
Jun. 28, 2016
Filed:
Dec. 10, 2012
Applicant:
Uhde Inventa-fischer Gmbh, Berlin, DE;
Inventors:
Christopher Hess, Schönflies, DE;
Hans Staudenmayer, Berlin, DE;
Assignee:
Uhde Inventa-Fischer GmbH, Berlin, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 63/85 (2006.01); C08G 63/80 (2006.01);
U.S. Cl.
CPC ...
C08G 63/85 (2013.01); C08G 63/80 (2013.01);
Abstract
The present invention relates to a method for the production of aliphatic polyesters in a two-step method. There are thereby added, in a first step, to a precondensate of an aliphatic dicarboxylic acid or to a mixture of aliphatic dicarboxylic acids and an aliphatic dialcohol or to a mixture of aliphatic dialcohols, further monomeric components, i.e. further aliphatic dicarboxylic acids and also a further aliphatic dialcohol, a polyester prepolymer being obtained. In a further step, polycondensation of the prepolymer obtained in the first step is effected.