| 摘要 |
Compositions comprise by weight (A) 2 to 98% of an acrylonitrile polymer containing at least 70% acrylonitrile and up to 30% of a copolymerizable component and (B) 98 to 2% of an acrylonitrile-vinylidene chloride copolymer containing less than 80% of vinylidene chloride. The copolymerizable component may comprise one or more of acrylic, methacrylic or chloracrylic acids, esters or amides; maleic, fumaric, mesaconic, citraconic, itaconic and methylene malonic esters; vinyl carboxylates; vinyl aromatic compounds; vinyl heterocyclic compounds; and particularly components to improve dyeability, e.g. itaconic acid, methallyloxybenzene sulphonate, alloxybenzene sulphonate, vinylbenzene sulphonate and sodium paramethacrylamidobenzene sulphonate. The compositions may also contain stabilizers, plasticizers, delusterants, optical brighteners, lubricants and antistatic agents, and may be dissolved in solvents, e.g. dimethyl acetamide, dimethyl formamide, dimethyl sulphoxide, nitric acid, aqueous sodium thiocyanate and aqueous zinc chloride, and spun into fibres, e.g. for making carpets. Examples describe compositions comprising acrylonitrile/vinylidene chloride copolymers and (I and II) acrylonitril/vinyl acetate copolymers, or (III) copolymers of acrylonitrile with vinyl acetate, vinyl acetate and vinylidene chloride, vinyl acetate and styrene, and methyl acrylate. Stabilizers, e.g. triisopropanolamine borate and dibutyl tin oxide, may be present.
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