| 摘要 |
<p>Fibres made by extrusion of mixes of crystalline polyolefins with basic nitrogen-containing polymers are treated, before or after treatment with mono- or di-epoxy compounds, with aqueous sulphuric acid solutions and then washed with water and/or alkaline agents. Specified polyolefins include isotactic polypropylene, and specified nitrogen-containing polymers include polyvinyl pyridines obtained by free radical or stereospecific polymerization, condensation products of epichlorhydrin, aliphatic amines and diamines; of epichlorhydrin, aliphatic amines and imines; of epichlorhydrin, aliphatic amines and diimines, e.g. piperazine; of epichlorhydrin, alkyl chlorides and diamines; and condensation products of halogen derivatives with diamines. Epoxy compounds mentioned include glycol diglycidyl ether, used in 10% by weight aqueous solution, and alkaline agents mentioned include alkali or alkaline-earth hydroxides or carbonates. The sulphuric acid treatment may be carried out before or after stretching, continuously or batchwise, preferably at 15 DEG -100 DEG C. for from 1 sec.-60 mins., using acid of 0,01-30% by weight concentration. Treatment improves the tinctorial characteristics of the fibres and the fastness of colours obtained thereon, especially with acid, metallized, plastosoluble or vat dyes. Specification 879,198 is referred to.</p> |
