Patent GB-984631-A (GB)
Title: Improved polymeric composition useful for fabricating fibre, films and other shaped articles
IPC: C08L25/16
Filed: 1961-05-15
Abstract: Synthetic resin compositions comprise a mixture of (A) (i) a substituted vinyl alcohol polymer or (ii) a substituted or unsubstituted vinyl alcohol copolymer, either of (i) or (ii) containing 10 to 90 mol. per cent of vinyl alcohol units in the polymer chain and being insoluble in water but soluble in organic solvents, and (B) a polymer or copolymer of a cyclic vinyl compound or the a -methyl derivative thereof, having a second order transition temperature above 100 DEG C. and a softening temperature above 150 DEG C., there being at least 20% of each of components (A) and (B), Component (A) may be a vinyl alcohol polymer which has been acetalized with one or more aliphatic and/or aromatic aldehydes, cyano ethylated with acrylonitrile, urethanized with urea, phenyl isocyanate or phenyl urea, esterified with formic, acetic, benzoic or boric acid, or both esterified and acetalized; or may be a saponification product of copolymers of vinyl esters with olefins, acidic or nitrogen-containing monomers, or vinyl chloride, or acetalization products of such saponification products.  Long lists of suitable polymers and precursors thereof are given.  Component (B) may be a polymer of styrene or a -methyl styrene, or the alkyl, halo, hydroxy, acyloxy, carboxy and sulphonic acid derivatives thereof, vinyl naphthalene, acenaphthylene, divinyl biphenyl, 2-vinyl fluorene, or a copolymer thereof with acrylic or methacrylic esters, acrylonitrile, vinyl chloride, vinyl acetate, vinylidene chloride, ethylene or propylene.  Long lists of suitable polymers and precursors thereof are given.  The compositions may also contain plasticizers, and may be dissolved in solvents, e.g. cyclic ethers, aliphatic ketones, cyclic ketones, halogenated hydrocarbons, aromatic hydrocarbons, dimethyl formamide or dimethyl sulphoxide, or mixtures thereof with alcohols, water, carbon disulphide or acetonitrile.  The compositions may be made into films, moulded articles, and particularly fibres by wet, dry, semi-melt or melt spinning. Examples describe compositions comprising (I and II) polyvinyl formal and poly-a -methylstyrene, (III) polyvinyl b -amino butyral/ formal and poly-a -methyl styrene, (V) polyvinyl acetate/formal and polydichlorostyrene, (VI) polyvinyl formal and a styrene/maleic anhydride copolymer, (XIII) cyanoethylated polyvinyl alcohol and poly-a -methyl styrene, and (XIV) polyvinyl formal, poly-a -methyl styrene and a styrene/maleic anhydride copolymer dissolved in aqueous dioxane; (IV) polyvinyl formal and poly-a -methyl styrene, and (IX) polyvinyl benzal and poly-a -methyl styrene dissolved in mixtures of ethylene dichloride and methanol; (VIII) polyvinyl formal and poly-a -methyl styrene, and (X) a saponified ethylene/vinyl acetate copolymer and a styrene/vinyl naphthalene copolymer dissolved in mixtures of benzene and methanol; (XI) polyvinyl butyral and polyvinyl toluene dissolved in dimethyl sulphoxide; and (XII) polyvinyl benzal/dimethylaminoacetal and an a -methyl styrene/methyl methacrylate copolymer dissolved in aqueous tetrahydrofuran.