Asahi Kasei Kogyo Kabushiki Kaisha

Yoshihisa Shichijo

Hideo Sato

Toshio Iwasa

Yasuo Uchida

Modacrylic fibers having excellent flameproof property and retaining the superior whiteness, heat-stability, etc. of Acrylonitrile polymer fibers are produced from the polymers containing, as principal components, 50 percent by weight or more of acrylonitrile, 25 percent by weight of more of vinylidene chloride and 0.1 - 3 percent by weight of bis(2-chloroethyl) vinylphosphonate, and if necessary, as additional component, at least one copolymerizable ethylenically unsaturated compound.

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Fuji, Japan

Yoshihisa Shichijo