Method for producing flame resistant acrylic fibers

Details Method for producing flame resistant acrylic fibers Method for producing flame resistant acrylic fibers

1976-05-20

1978-07-18

Briggs, Sr., Wilbert J.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

260 326N, 260 4575W, 260 457S, 260881, D01F 638, C08F25904, C08F25906, C08F26508

Patent

active

041016211

ABSTRACT:
Flame resistant acrylic fibers are produced by, in a solution polymerization of a mixture consisting of 30-80% by weight of acrylonitrile, 20-70% by weight of vinyl chloride or vinylidene chloride and 0-15% by weight of the other unsaturated monomer in a solvent of dimethylformamide, adding a polymer (referred to as blendmer) consisting of acrylonitrile, vinyl chloride or vinylidene chloride and an anionic monomer and zinc salt of an aromatic sulfonic acid prior to starting of the polymerization, subjecting the resulting mixture to the solution polymerization, removing unreacted monomers from the formed polymer solution, adding sulfur dioxide and adding water to adjust water content, spinning the thus formed spinning solution into an aqueous solution of dimethylformamide.

REFERENCES:
patent: 3364283 (1968-01-01), Davis
patent: 3436364 (1969-04-01), Logemann et al.
patent: 3573235 (1971-03-01), Yamamoto et al.
patent: 3903038 (1975-09-01), Neal
patent: 3936511 (1976-02-01), Konig et al.

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