Mitsubishi Rayon Company, Limited

Kunihiro Aoki

Hajime Itoh

Hiroshi Takahashi

Teruhiko Sugimori

Kazutami Mitani

Seiji Hayashi

Shunsuke Minami

Yoshitaka Imai

Akira Hajikano

Kouji Takehashi

Kouzi Ohbori

Acrylic fiber comprising an acrylonitrile-based copolymer comprising 96.0 to 98.5% by weight of acrylonitrile units, 1.0 to 3.5% by weight of acrylamide units and 0.5% by weight or more of methacrylic acid units, the percentage by weight (A) of acrylamide units and the percentage by weight (M) of methacrylic acid units in the copolymer satisfying the following equations (I) and (II), and adsorbed iodine in an amount of 1% by weight or less based on the weight of the copolymer:

Acrylic fiber and process for production thereof

An acrylonitrile polymer film is disclosed which film comprising a polymer containing higher than 80% by weight of acrylonitrile units, having higher than 300,000 of weight average molecular weight, and having molar fraction Ne for the segment of polymerization initiator bonded to the terminal of the polymer satisfying the following equation:

Process for preparing acrylonitrile polymer film

Porous membranes and production processes thereof

A method is described for reducing a hydroxocobalt (III) Schiff base complex to a cobalt (II) Schiff base complex by heating the former complex to a temperature below the decomposition point of the latter complex.

Method for reducing hydroxocobalt (III) Schiff base complex

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Hiroshima, Japan

Kunihiro Aoki