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:
Aug. 23, 2016
Filed:
Mar. 29, 2013
Kureha Corporation, Tokyo, JP;
Akihiro Konno, Tokyo, JP;
Ken-Ichi Takaki, Tokyo, JP;
Yui Yoshida, Tokyo, JP;
Yasuhiro Suzuki, Tokyo, JP;
KUREHA CORPORATION, Tokyo, JP;
Abstract
A granular polyarylene sulfide; (i) the granular polyarylene sulfide containing an —S— substituent at the terminal, the substituent being formed by cleavage of a disulfide compound; (ii) the granular polyarylene sulfide being an oversize fraction after sifting with a sieve having a mesh size of at least 38 μm; (iii) the granular polyarylene sulfide having a halogen content of at most 1,500 ppm; and (iv) the granular polyarylene sulfide being a granular polyarylene sulfide having a melt viscosity of 3 to 100 Pa·s when measured under conditions at a temperature of 310° C. and a shear rate of 1,200 sec. The granular polyarylene sulfide is well balanced in melt viscosity, halogen content, nitrogen content, thermal stability, and yield.