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:
May. 12, 2015
Filed:
Feb. 27, 2013
Toray Industries, Inc., Tokyo, JP;
Akinori Kanomata, Nagoya, JP;
Yosuke Nishimura, Tokai, JP;
Shunsuke Horiuchi, Nagoya, JP;
Shu Kaiho, Nagoya, JP;
Kazusada Takeda, Tokai, JP;
Koji Yamauchi, Nagoya, JP;
Junya Suzuki, Tokai, JP;
Toray Industries, Inc., , JP;
Abstract
A production method includes a process (I) of heating a cyclic polyarylene sulfide composition under reduced pressure and a process (II) of heating and polymerizing a cyclic polyarylene sulfide composition. This simple method allows for production of a polyarylene sulfide of the higher molecular weight and can produce a polyarylene sulfide having a narrow molecular weight distribution, low gas generation and high industrial usability. Additionally, pelletization after the process (I) can produce a cyclic polyarylene sulfide pellet having ease of conveyance, excellent molding processability, less gas generation amount and high industrial usability.