process for the production of faeden, fibers and films from polyacrylnitril and modacrylnitrilpolymeren

摘要

Threads, fibres and films are produced by spinning solns. of (mod)acrylonitrile polymers contg. 0.05-4.0 wt.% based on polymer, cyanethylated phosphine of formula (I) opt together with 0.01-0.1 wt. % tris-(oxymethyl)-phosphine. R - P (CH2 - CH2 - CN)2 (I) (where R is H, alkyl, or CH2CH2CN). Pref. (I) is tris-(2-cyanoethyl)-, bis-(2-cyanoethyl)-, or n-hexyl- bis-(2-cyanoethyl)-phospine. The phosphine are added to the solvent before the polymer. Prevents discolouration of the spinning solns. at high temps. The stabilisers have a low toxicity, and are non-irritating to the skin.