Mitsui Chemicals, Inc.

Setsuko Fujiyoshi

Tadahito Nobori

Isao Hara

Shinji Kiyono

Kazumi Mizutani

Atsushi Shibahara

Katsuhiko Funaki

Takaomi Hayashi

Tsuyoshi Matsumoto

Shoji Tamai

Takashi Kuroki

Akira Hasegawa

Mitsuyuki Mizoguchi

Masahiro Toriida

Hiroyuki Sakayama

Kuniyuki Takamatsu

Takaharu Abe

Yoshiharu Hirose

Yoshiteru Taniguchi

Hiromi Jouyama

There are disclosed, a polyether ketone having a primary particle size of 50 &#x3bc;m 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.

Polyether ketone and method of producing the same

The purpose of the present invention is to provide polymerization catalyst which can produce quite efficiently (co)polymer having number average molecular weight and number of molecules which are accurately controlled in producing method of (co)polymer by the polymerization of polar unsaturated compound, and provide living polymerized (co)polymer obtained according to the producing method. For the purpose, polymerization catalyst composition which comprises the composition comprising organic oxysalt compound and hydroxycarbonyl compound having at least both an alcoholic hydroxyl group and a carbonyl group in the same molecule is provided and the polar unsaturated compound is polymerized by using the polymerization catalyst composition. The composition containing the obtained (co)polymer were able to provide thermosetting powder coating composition having particularly excellent characteristics.

Process for the production of living (co)polymers and use of the (co)polymers

Process for preparation of substituted aromatic compound

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Sodegaura, Japan

Setsuko Fujiyoshi