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:
Oct. 03, 2006
Filed:
Jul. 23, 2004
Shunsuke Horiuchi, Nagoya, JP;
Atsushi Ishio, Nagoya, JP;
Kei Saitoh, Nagoya, JP;
TORAY Industries, Inc., Tokyo, JP;
Abstract
This invention provides a method for producing a polyarylene sulfide, comprising the step of bringing a low-hydrated alkali metal sulfide containing respectively 0.05 to less than 0.8 mole of water and an organic amide solvent per mole of the sulfur contained in the alkali metal sulfide, into contact with a dihalogenated aromatic compound in an organic polar solvent for polymerization. This invention also provides a polyarylene sulfide obtained by the method. The problem to be solved by this invention is to provide a method for efficiently producing a polyarylene sulfide in a short time using an alkali metal sulfide small in water content and organic amide solvent content.