Polyurethane urea elastic yarn dyeable with reactive dye and manufacturing method therefor
AssigneeHyosung Tnc Corporation
InventorsJi Young Kang, Yeon Soo Kang, Tae Heon Kim, Seong Bin Cho
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Abstract
The present invention is directed to a reactive dye-dyeable polyurethane-urea elastic yarn including a reaction product of at least two polyols, a diisocyanate compound, a diamine chain extender, an amine chain terminator, and a diethylenetriamine compound, wherein one of the polyols is polyethylene glycol, which is included in an amount of 20 to 30.0 mol % based on the total amount of the polyols, a polyurethane-urea polymer includes 10 meq/kg to 45 meq/kg of primary amine ends, and the capping ratio (CR) of the diisocyanate to the polyols is 1.8 to 2.0.
Claims9
A reactive dye-dyeable polyurethane-urea elastic yarn comprising a reaction product of at least two polyols, a diisocyanate compound, a diamine chain extender, an amine chain terminator, and a diethylenetriamine compound, wherein one of the polyols is polyethylene glycol, which is comprised in an amount of 20 to 30.0 mol % based on the total amount of the polyols, the yarn comprises 10 meq/kg to 45 meq/kg of primary amine ends, and a capping ratio (CR) of the diisocyanate to the polyols is 1.8 to 2.0.
A method for manufacturing a polyurethane-urea elastic yarn, the method comprising:
- producing a polyurethane prepolymer by reacting two polyols with a diisocyanate compound;
- preparing a prepolymer solution by dissolving the polyurethane prepolymer in a solvent;
- subjecting the prepolymer solution and an amine solution containing a diamine chain extender, an amine chain terminator and diethylenetriamine to stirring and chain extension reaction to obtain a polyurethane-urea spinning dope containing a polyurethane-urea polymer containing 10 meq/kg to 45 meq/kg of primary amine ends;
- and spinning the obtained polyurethane-urea spinning dope to manufacture the polyurethane-urea elastic yarn;
- wherein the two polyols are a combination of polytetramethylene ether glycol (PTMG) and polyethylene glycol (PEG), the polyethylene glycol is used in an amount of 20 to 30.0 mol % based on the total amount of the polyols, diethylenetriamine is added in an amount of 100 ppm to 300 ppm on solids content during preparation of the spinning dope, and a capping ratio (CR) of the diisocyanate to the polyols in the prepolymer solution is 1.8 to 2.0.
Dependencies are inferred from the claim text.