Elasthane threads, their production and intermediate products required therefor
AssigneeBayer Aktiengesellschaft
InventorsMichael Kausch, Hans Schroer, Karl-Heinz Wolf, Heinz Gall, Carlhans Suling, Rudi Dauscher
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Abstract
In the production of elasthane threads by solution spinning of polyurea polyurethanes by conventional spinning processes, excellent stabilization against light and noxious gases are obtained if at least one component of the system to be spun contains tertiary amino groups and the substances used as antioxidizing agents are phenols of the kind which do not form colored nitro compounds.
Claims9
Process for the production of elasthane threads by solution spinning of polyurea polyurethanes by conventional spinning processes, characterised in that at least one component of the system which is to be spun contains tertiary amino groups and in that phenols which do not form coloured nitro compounds are used as anti-oxidants.
Polyurethanes, characterised in that they are synthesized from aliphatic diisocyanates and 4-tertiarypentyl-4-azaheptandiol-2,6.
Stabilised elasthane threads of segmented polyurethanes based on polyester or polyetherdiols and at least an aromatic diisocyanate containing a tertiary amino group and such phenols which do not form coloured nitro compounds.
Dependencies are inferred from the claim text.