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:
Jan. 05, 2021
Filed:
Oct. 22, 2018
Applicant:
Ticona Llc, Florence, KY (US);
Inventor:
Hendrich A. Chiong, Cincinnati, OH (US);
Assignee:
Ticona LLC, Florence, KY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 75/14 (2006.01); C08G 75/0204 (2016.01); C08G 75/025 (2016.01); C08G 75/0281 (2016.01);
U.S. Cl.
CPC ...
C08G 75/14 (2013.01); C08G 75/0204 (2013.01); C08G 75/025 (2013.01); C08G 75/0281 (2013.01);
Abstract
A method for forming a polyarylene sulfide is described. The method can include a multi-step cooling and precipitation process in which the cooling rate of the solution that carries the polymer is decreased during a portion of the overall cooling. This slower cooling period can encompass at least a portion of the period during which the polymer precipitates from the solution. The precipitation process can form polyarylene sulfide particles with good particle integrity and a narrow particle size distribution, which can reduce fines and improve downstream processing and final product characteristics.