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:
Jul. 08, 2003
Filed:
Aug. 30, 2001
Applicant:
Inventor:
Thomas Canova, Santo André, BR;
Assignee:
Rhodia Ster S.A., Sao Paulo, BR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 6/302 ;
U.S. Cl.
CPC ...
C08G 6/302 ;
Abstract
The present invention refers to a process for manufacturing polyester comprising at least the following steps: (a) esterifying or transesterifying a carboxylic diacid or a dieester of a carboxylic diacid with a diol, (b) polymerizing in melt phase the esterification or transesterification product, (c) solidifying and granulating, (d) placing in contact the granules with a liquid swelling medium, and (e) post-condensing the granules in solid phase. The realization of the immersion step in a swelling medium permits increasing the kinetics of the solid phase post-condensation step.