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:
Feb. 07, 2012
Filed:
May. 31, 2007
Applicant:
Eike Schulz Van Endert, Berlin, DE;
Inventor:
Eike Schulz Van Endert, Berlin, DE;
Assignee:
Uhde Inventa-Fischer GmbH, Berlin, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J 19/18 (2006.01); B01J 19/00 (2006.01); B01J 8/00 (2006.01); B01J 8/04 (2006.01); B01J 8/02 (2006.01); B01J 35/02 (2006.01); C08F 2/00 (2006.01); C08G 63/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a method for the continuous production of high-molecular polyesters by esterification of dicarboxylic acids and/or transesterification of dicarboxylic acid esters with diols and/or mixtures thereof in the presence of catalysts with formation of a prepolymer in a tower reactor and polycondensation thereof to form a high-molecular polyester in a polycondensation reactor, a prepolymer with >40 to 70 repeat units (DP) being produced in the tower reactor and this prepolymer being polycondensed in only one further reactor to form a polyester with >150 to 205 DP.