Process for manufacturing medium and high molecular weight polyesters

Process for manufacturing medium and high molecular weight polyesters

  • CN 101,939,031 A
  • Filed: 02/05/2009
  • Published: 01/05/2011
  • Est. Priority Date: 02/06/2008
  • Status: Active Grant
First Claim
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1. method that is used to prepare intermediate molecular weight or high molecular weight polyesters serosity, described method comprises:

  • A) provide or form ester oligomer;

    B) be in and form the reactant mixture that contains described oligomer in the non-reacted supporting agent of azeotropic mixture with water by under the temperature of elevated pressure and rising, stirring, described oligomer is changed into polyester polymers;

    WithC) dewater from described reactant mixture by the azeotropic backflow, thereby obtain serosity, described serosity contains intermediate molecular weight or the solution of high molecular weight polyester polymers in described non-reacted supporting agent.

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