POLYURETHANEUREA ELASTIC YARN HAVING HIGH ELONGATION, AND MANUFACTURING METHOD THEREFOR

WIPO Patent Application WO/2018/080063

A1

The present invention relates to a polyurethaneurea elastic yarn having excellent thermal stability and a high elongation, and a manufacturing method therefor, and provides a method for manufacturing a polyurethaneurea elastic yarn, comprising the steps of: preparing a polyurethane precursor by polymerizing diisocyanate and a polyol containing 200-3,000 ppm or less of butanol, and then preparing a prepolymer solution by dissolving the same in a solvent; preparing a polyurethaneurea spinning dope solution by adding, to the prepolymer, 70-100 mol% of ethylenediamine as a chain extender, 0-30 mol% of 1,2-diaminopropane as an auxiliary chain extender, 50-100 mol% of diethylamine as a chain terminator, and 0-50 mol% of an auxiliary chain terminator, and reacting the same; and spinning and winding the polyurethaneurea spinning dope solution, wherein the elongation is at least 500%, the maximum draw ratio is at least 4.8 or more, and the thermal stability is at least 40%. A polyurethaneurea elastic yarn manufactured by the method has excellent elongation and Max. DR, and exhibits an effect of enabling productivity to improve during flat knitting if the elastic yarn is used, and enabling thermal degradation to be prevented in a heat setting process during processing of a fabric.

LEE JAE MYUNG (KR)
KI BO RAM (KR)
KANG YEON SOO (KR)

PCT/KR2017/011324

May 03, 2018

October 13, 2017

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HYOSUNG CORP (KR)

D01F6/70; D01D1/06; D01D5/04; D01F1/10; D02G3/32

KR100780434B1	2007-11-29
KR101396107B1	2014-05-15
KR101395973B1	2014-05-16
KR20010052482A	2001-06-25
JP2002088571A	2002-03-27

KIM, Hong Gyun (KR)

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