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. 15, 2007
Filed:
Dec. 10, 2002
Masahiro Toriida, Sodegaura, JP;
Takashi Kuroki, Sodegaura, JP;
Takaharu Abe, Sodegaura, JP;
Akira Hasegawa, Sodegaura, JP;
Kuniyuki Takamatsu, Sodegaura, JP;
Yoshiteru Taniguchi, Sodegaura, JP;
Isao Hara, Sodegaura, JP;
Setsuko Fujiyoshi, Sodegaura, JP;
Tadahito Nobori, Sodegaura, JP;
Shoji Tamai, Sodegaura, JP;
Masahiro Toriida, Sodegaura, JP;
Takashi Kuroki, Sodegaura, JP;
Takaharu Abe, Sodegaura, JP;
Akira Hasegawa, Sodegaura, JP;
Kuniyuki Takamatsu, Sodegaura, JP;
Yoshiteru Taniguchi, Sodegaura, JP;
Isao Hara, Sodegaura, JP;
Setsuko Fujiyoshi, Sodegaura, JP;
Tadahito Nobori, Sodegaura, JP;
Shoji Tamai, Sodegaura, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
There are disclosed, a polyether ketone having a primary particle size of 50 μm or less; and a method of producing a polyether ketone by a desalting polycondensation, which contains a step of conducting a polymerization reaction under a condition of deposition of the polymer. The polyether ketone obtained by the present invention has small particle size, high molecular weight and sufficiently small content of impurities such as alkali metal components.