Hoechst Aktiengesellschaft

Bernd Sassenrath

Ernst-August Albers

Walter Fester

The invention relates to modacryl filaments and fibers made from copolymers insoluble in acetone of acrylonitrile and from 20 to 45 weight % of vinylidene chloride, containing from 0 to 1.5 weight % of unsaturated organic sulfonic acids or the salts thereof, and from 0 to 10 weight % of further copolymerizable compounds, which copolymers have a K value according to Fikentscher of from about 60 to about 90, and a process for the manufacture thereof. These modacryl filaments and fibers are especially distinguished by their permanent brilliance and permanent transparence; these properties are maintained even on contact with water having a temperature above 80.degree. C.

Modacryl filaments and fibers and process for their manufacture

The invention relates to modacryl filaments and fibers made from copolymers insoluble in acetone of acrylonitrile and from 20 to 45 weight % of vinylidene chloride, containing from 0 to 1.5 weight % of unsaturated organic sulfonic acids or the salts thereof, and from 0 to 10 weight % of further copolymerizable compounds, which copolymers have a K value according to Fikentscher of more than about 95 and a process for the manufacture thereof. These modacryl filaments and fibers are especially distinguished by their permanent brilliance and permanent transparence; these properties are maintained even on contact with water having a temperature above 80.degree. C.

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Niedernhausen, Germany

Bernd Sassenrath