Preparation method of antistatic easy-to-color polyurethane elastic fiber

Preparation method of antistatic easy-to-color polyurethane elastic fiber

  • CN 107,858,766 B
  • Filed: 12/08/2017
  • Issued: 08/20/2021
  • Est. Priority Date: 12/08/2017
  • Status: Active Grant
First Claim
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1. The preparation method of the antistatic easy-to-color polyurethane elastic fiber is characterized by comprising the following steps of:

  • s1, mixing diisocyanate and oligomer dihydric alcohol for reaction to obtain a polyurethane prepolymer;

    s2;

    dissolving the polyurethane prepolymer from S1 with an aprotic polar solvent to obtain a prepolymer solution;

    s3;

    cooling the prepolymer solution from S2 and adding a chain extender and a chain terminator to form a polyurethaneurea solution;

    s4;

    adding an N-N-alkyl diethanol amine additive into the polyurethane urea solution from S3, and fully and uniformly mixing to form a spandex spinning solution, wherein the N-N-alkyl diethanol amine additive is represented by the following formula;



    the R group is C10 ~ C24Normal alkyl of (a);

    s5;

    after the spandex spinning solution from S4 is cured, obtaining the antistatic and easy-to-color polyurethane elastic fiber by adopting dry spinning;

    the addition amount of the N-N-alkyl diethanol amine additive in the S4 is 0.01-20% of the mass of the polyurethane urea polymer.

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