| 摘要 |
In the manufacture of threads, filaments and films of regenerated cellulose by spinning viscose, an o-aminoalkyl ether of a polyalkylene glycol is added to the viscose and/or the coagulating bath (see the parent Specification). The o-aminoalkyl ethers have the formulae HO(CnH2nO)xRNH2 or H2NRO(CnH2n)xR1NH2 in which R and R1, same or different, are alkylene or substituted alkylene chains, and x is 10 to 60. Preferably, R and R1 contain 2 to 4 carbon atoms, and preferably, n is 2 or 3. The polyalkylene glycols may be e.g. polyethylene glycol, polypropylene glycol or a polyethylene polypropylene glycol. Specified compounds are the monoo-aminopropyl ethers or the dio-aminopropyl ether of a polyethylene oxide wax, the did-aminob-hydroxy-propyl ether of polyethylene glycol, and the monob-aminoethyl ether of an addition compound of ethylene oxide with a polypropylene glycol. The compounds may be prepared by treating the polyalkylene glycol either with 1 or 2 moles of acrylonitrile, followed by hydrogenation, or by treatment with ethyleneimine. The compounds are preferably present to an extent of 0.01 to 0.5% by weight based on the viscose or the coagulating bath, as appropriate, as in the parent Specification. In an example, viscose containing 0.2% by weight of the hydrogenated reaction product of 1 mole polyethylene oxide wax (mol. wt. 8630) and 1 mole acrylonitrile is ripened at 14 DEG C. for 42 hours, and spun through a multi-hole spinneret containing 70g/1 H2SO4, 130 g/l Na2SO4 and 90 g/l ZnSO4 at 50 DEG C. The filaments are stretched 100% in a second bath at 90 DEG C. containing 2% H2SO4, washed, deacidified and stretched a further 10%. The filaments are characterised by a strongly developed shell with smooth periphery and a small or negligible core. |
