Method for making polyamide

Method for making polyamide

  • CN 102,356,113 A
  • Filed: 03/09/2010
  • Published: 02/15/2012
  • Est. Priority Date: 03/20/2009
  • Status: Active Grant
First Claim
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1. prepare the method for polymeric amide by at least a diacid and at least a diamines, may further comprise the steps:

  • (a) diacid that at least a diacid through the mixed chemical metered amount and at least a diamines is obtained through vaporize water and the aqueous solution of two amine salt concentrate;

    Until obtaining the uniform aqueous solution;

    Wherein in the water weight concentration of solute greater than 85%;

    Advantageously more than or equal to 86%, be preferably greater than or equal 87%, more preferably greater than or equal 88%;

    With(b) polymerization dewaters, and reaches the required polymerization degree, comprises at least one step of polymerization b1 under pressure).

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