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:
Apr. 11, 2006
Filed:
Mar. 15, 2002
Applicants:
Minoru Senga, Chiba, JP;
Masaya Okamoto, Chiba, JP;
Mikiya Hayashi, Chiba, JP;
Inventors:
Assignees:
Petroleum Energy Center, Tokyo, JP;
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08G 75/00 (2006.01); C08G 75/14 (2006.01); C08G 75/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
There is disclosed a process for continuously producing a polyarylene sulfide which comprises reacting a sulfur source with a dihalogenated aromatic compound in an aprotic organic solvent, characterized by maintaining the content of the dihalogenated aromatic compound in the polymerization liquid after the substantial completion of the polymerization reaction at 5 mg/g or higher. It is made possible by the process according to the present invention to efficiently produce the polyarylene sulfide which has a high molecular weight and is excellent in thermal stability.