Elastic polyurethane yarn and process for production thereof
AssigneeINVISTA North America S.a.r.I.
InventorsToshihiro Tanaka, Masashi Hara, Tatsuaki Kanbayashi
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Abstract
Disclosed is an elastic polyurethane yarn which can exhibit excellent heat resistance even when an unsaturated fatty acid or a heavy metal is attached to the yarn during dyeing at a high temperature, and which has high elastic recovery and high strength/elongation. Specifically disclosed is an elastic yarn comprising a polyurethane mainly composed of a polymer diol and a diisocyanate, which contains (a) a hindered phenol compound, (b) an N,N-dialkylsemicarbazide compound and (c) a nitrogenated aromatic compound, wherein the nitrogenated aromatic compound (c) is contained in an amount of 0.01 to 0.30 weight % inclusive.
Claims8
A polyurethane elastic yarn comprising a polymer diol and a diisocyanate, wherein said polyurethane elastic yarn comprises (a) a hindered phenol compound, (b) an N,N-dialkyl semicarbazide compound and (c) a nitrogen-containing aromatic compound, and wherein the nitrogen-containing aromatic compound is at least 0.01 wt % and at most 0.30 wt % by weight of the yarn.
A method for preparing polyurethane elastic yarn wherein (a) a hindered phenol compound, (b) an N,N-dialkyl semicarbazide compound, and (c) a nitrogen-containing aromatic compound are added to a solution of polyurethane comprising a polymer diol and diisocyanate, to provide a polyurethane spinning solution containing the nitrogen-containing aromatic compound (c) in a proportion of at least 0.01 wt % and at most 0.30 wt % with respect to polyurethane, and spinning said solution.
Dependencies are inferred from the claim text.