Filaments and fibers of acrylonitrile copolymer mixtures

Details Filaments and fibers of acrylonitrile copolymer mixtures Filaments and fibers of acrylonitrile copolymer mixtures

1980-05-29

1983-05-10

Woo, Jay H.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

264182, 264206, 2642107, 525931, C08L 3320

Patent

active

043830862

ABSTRACT:
The invention relates to flame-retarding filaments and fibers and a process for the manufacture thereof. The filament-forming substance is a mixture of from 20 to 70 weight % of an acrylonitrile copolymer A containing at least 80 weight % of acrylonitrile units and from 0.3 to 20 weight % of other units copolymerizable with acrylonitrile, and from 80 to 30 weight % of an acrylonitrile copolymer B containing from 50 to 75 weight % of acrylonitrile units, from 25 to 45 weight % of vinyl chloride and/or vinylidene chloride units and from 0 to 5 weight % of other units copolymerizable with acrylonitrile.
The filaments and fibers have a boil-off shrinkage of at least 20% and a knot strength of at least 10 cN/tex and are obtained by spinning the turbid solutions of the copolymer mixture, which however do not separate into components, in an aprotic solvent, and drawing of the filaments in a moderate ratio.

REFERENCES:
patent: 3404204 (1968-10-01), Nakagawa et al.
patent: 3814739 (1974-06-01), Takeda
patent: 3846226 (1974-11-01), Smithey
patent: 3963790 (1976-06-01), Couchoud
patent: 4036803 (1977-07-01), Kobashi et al.
patent: 4081498 (1978-03-01), Mavanci
patent: 4223108 (1980-09-01), Cazzavo et al.
patent: 4226824 (1980-10-01), Cazzavo et al.
patent: 4256684 (1981-03-01), Achard et al.
patent: 4287148 (1981-09-01), Cazzavo et al.

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