| 摘要 |
A single phase melt-spinnable composition comprises (1) an amide type synthetic linear fibre-forming condensation polymer and (2) a water-soluble poly(N-vinyl amide) having a main polymer chain consisting substantially exclusively of carbon atoms. Preferably (2) remains water-soluble after heating, and the specified materials are polymers of N-vinyl lactams or N-vinyl N-alkyl aliphatic amides (including lactams wherein the vinyl group is substituted by alkyl or acyl, and amides wherein the vinyl group is separated from the N atom by methylene groups), e.g. poly (N-methyl-N-vinyl-formamide), poly (N-vinyl-propiolactam), poly (N-vinyl-valerolactam) and in particular poly (N-vinyl-pyrrolidone). The preferred condensation polymer (1) is a polyamide, e.g. 6 nylon, 66 nylon or 6,10 nylon, but polyurethanes, polyureas and the thioanalogues also may be used. The compositions may be obtained by melt blending or by the aid of solvents, e.g. methanol, formic acid or in particular water. Conveniently the poly (N-vinyl amide) may be added to the condensation polymer forming reactants before or during the condensation reaction, as is illustrated in the examples. Optional composition ingredients are polystyrene, titanium dioxide, manganous hypophosphite (light stabilizer) and antioxidants such as sodium phenyl phosphinate, cupric chloride, cupric acetate, potassium iodide, sodium thiosulphate, benzoquinone, diphenyl-p-phenylene diamine, pyrogallol and sodium iodide. The compositions may be formed into filaments or film and find application in fabrics and carpets, due to the improved dyeability and increased hydrophilic nature. Specifications 461,236, 506,125, 535,421, 543,466, 639,893, 673,757, 902,905 and 905,895 are referred to.
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