DE1091277B - Process for the production of threads from vinyl or vinyl copolymers with at least 85% vinyl chloride - Google Patents

Description

Process for the production of threads from vinyl or vinyl copolymers with at least 85% vinyl chloride It is known that the halogenated vinyl polymers Fibers can result which have good mechanical properties, but which when dyeing present difficulties, be it because of the usable dyes on the disperse dyes for acetate and, to a small extent, on vat dyes and limit their leucoesters, whose affinity for such structures is limited, be it because the dyeing temperature must not exceed certain limits. Such Threads can be dyed at 65 to 70 ° C; but start above this temperature to shrink this.

To overcome the difficulties of a weak affinity of the dyes for To overcome the fibers, one has generally sought to add substances which influence the fiber by causing it to swell and allow greater penetration of the dye. The swelling agents are, however difficult to remove, sometimes toxic and dangerous to use; above all is with them it is difficult to achieve uniform and non-streaked colorations.

In order to prevent this disadvantage, according to the present invention Threads or fibers produced by in a solvent known per se Vinyl or vinyl copolymers with at least 85% vinyl chloride together with a copolymer of acrylonitrile and butadiene or isoprene dissolved and the Solution is spun on it.

In this way one gains threads or fibers that make a significant difference have a higher affinity for the dyes than those made from pure halogenated vinyl polymer, and this without having to resort to swelling agents.

The colorations obtained in this way are uniform and their authenticity is satisfactory. The amounts of acrylonitrile-butadiene copolymer that are necessary to increase the affinity of the fibers to the dyes, are low. The mechanical properties of the fibers are excellent.

It was also observed that the stretching of the filaments after spinning to improve the mechanical properties (orientation of the polymer molecules) is significantly facilitated by the presence of the butadiene copolymer. example 90 kg of polyvinyl chloride are mixed with 10 kg of acrylonitrile-butadiene copolymer (1 : 1) mixed, then with 400 kg of a carbon disulfide-acetone mixture im Volume ratio 1: 1 dissolved and spun. The ones won after stretching Threads show the following properties: breaking strength 2.8 to 3.1 g / den, elongation 14 ° / o.

The continuous thread becomes 11/2 hours at 65 ° C with 5% »silver yellow GR «(C. J. 11855, 2nd edition., 1956), then 3 g / 1 Marseille soap soaped and rinsed. The threads appear very intensely colored while yellow others, colored in the comparison experiment, consisting only of halogenated vinyl polymer Structures for which the dye has a significantly lower affinity.

Claims (1)

PATENT CLAIM: Process for the production of threads from vinyl or Vinyl copolymers with at least 85% vinyl chloride, which with acetate dispersion dyes, Vat dyes or leuco esters and basic dyes are easy to dye, characterized in that a solution is spun, the vinyl or vinyl copolymers with at least 85% vinyl chloride and a copolymer of acrylonitrile with Contains butadiene or isoprene, preferably in a ratio of 1: 1. Considered U.S. Patent No. 2,686,169.