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:
Mar. 19, 2019
Filed:
Aug. 13, 2015
Applicant:
Sabic Global Technologies B.v., Bergen op Zoom, NL;
Inventors:
Husnu Alp Alidedeoglu, Evansville, IN (US);
Prashant Kumar, Evansville, IN (US);
Osit Karroonnirun, Evansville, IN (US);
Mark Nelson, Mt. Vernon, IN (US);
Assignee:
SABIC GLOBAL TECHNOLOGIES B.V., Bergen Op Zoom, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 63/02 (2006.01); C08G 63/85 (2006.01); C08G 63/183 (2006.01); C08G 63/78 (2006.01);
U.S. Cl.
CPC ...
C08G 63/85 (2013.01); C08G 63/183 (2013.01); C08G 63/78 (2013.01);
Abstract
A process for making oligomers of polybutylene terephthalate (PBT) with desirable intrinsic viscosity and carboxylic end group concentrations includes combining 1.4-butane diol (BDO). terephthalic acid and a catalyst to from a mixture and heating the mixture until the clearing point is reached based on visual inspection. The PBT oligomers are used in a continuous process for making polybutylene terephthalate (PBT) resin.