Process for producing glossy fibres of the modacrylic type havin

Details Process for producing glossy fibres of the modacrylic type havin Process for producing glossy fibres of the modacrylic type havin

1980-04-23

1981-09-01

Seccuro, Carman J.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

525197, 525212, C08L 3320, C08L 4100

Patent

active

042871484

ABSTRACT:
Modacrylic fibres from acrylonitrile, vinylidene chloride, and a sulphonated comonomer, having reduced inflammability and high glossiness and dye yield are prepared by wet spinning a polyblend obtained by mixing two binary copolymers, the first from acrylonitrile and the sulphonated comonomer, and the second from acrylonitrile and vinylidene chloride. As the sulphonated comonomer, a significantly homopolymerizable monomer is used, viz. a monomer which homopolymerizes with a conversion of at least 30-40% by weight, in the presence of azobisisobutyronitrile catalyst, under given standard reaction conditions. Preferred sulphonated monomers are acid or salts of the acrylamidoalkanesulphonic series. The spinning dope is a polyblend solution in an organic solvent chosen among dimethylformamide, dimethylacetamide, and dimethylsulphoxide, mixed with water.

REFERENCES:
patent: 2949437 (1960-08-01), Hobson
patent: 3256252 (1966-06-01), Kruckenberg et al.
patent: 3288888 (1966-11-01), Wiekowski
patent: 3963790 (1976-06-01), Couchoud
patent: 4036803 (1977-07-01), Kobashi et al.
patent: 4056517 (1977-11-01), Albers et al.
patent: 4101621 (1978-07-01), Yamamoto et al.

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