Method for preparing cationic-dyeable copolyester

Method for preparing cationic-dyeable copolyester

  • CN 101,570,596 A
  • Filed: 04/30/2009
  • Published: 11/04/2009
  • Est. Priority Date: 04/30/2009
  • Status: Active Application
First Claim
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1. the preparation method of a cation dyeable copolyester is characterized in that may further comprise the steps:

  • (1) ethylene glycol, terephthalic acid carry out esterification;

    (2) add ethylene glycol in the esterification gained mixture, mix the back and add SIPE solution, carry out transesterification reaction;

    (3) transesterification reaction gained mixture carries out polycondensation, makes cation dyeable copolyester,Wherein, the ethylene glycol that adds in the step (2) and the mol ratio of terephthalic acid are 0.1;

    1~

    0.2;

    1, and the mole number of the sulfonic acid group in the SIPE solution is 2%~

    3.5% of a terephthalic acid.

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