Japan Exlan Company Limited

Masaaki Fujimatsu

Toshiyuki Kobashi

Katsuaki Nomura

This invention relates to a method of producing a flame-retardant acrylic polymer by polymerizing, in the presence of a radical polymerization initiator, a vinyl monomer containing acrylonitrile in an amount of more than 75 weight %, in an aqueous medium in which is present a halogen-containing polymer latex substantially free from an emulsifier. The acrylic polymer can provide flame-retardant shaped products, especially fibers, which have no problems in the operation of spinning, transparency, gloss, dyed color clearness, etc.

Method of producing a flame-retardant acrylic copolymer

Method of producing a flame-retardant acrylic polymer

Acrylic synthetic fibers highly resistant to pilling and having good dyeability can be produced by specifying the composition of the acrylic polymer, the condition of the primary stretching step, the internal water content of the water-swollen gel fibers, the conditions of the steps of the drying-compacting, secondary stretching and relaxing heat treatment.

Process for producing acrylic synthetic fibers having anti-pilling

Process for imparting an animal hairlike hand to acrylic fibers by mixing a silicone resin and a polyoxyethylene alkylphenyl phosphate while adding water thereto to form an emulsion of weak acidity, applying the emulsion to swollen gelly acrylic fibers, drying the resultant fibers and applying a spinning oil to the dried fibers.

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Okayama, Japan

Masaaki Fujimatsu