Poly(2-hydroxyalkanoic acid) and method of its manufacture

Poly(2-hydroxyalkanoic acid) and method of its manufacture

  • CN 104,937,008 A
  • Filed: 08/14/2013
  • Published: 09/23/2015
  • Est. Priority Date: 08/16/2012
  • Status: Active Application
First Claim
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1. the method for preparation poly-(2-hydroxyl alkane acid), comprise the following steps:

  • by the lactide of 2-hydroxyl alkane acid and polymerizing catalyst mixing, described lactide is polymerized and forms liquid phase poly-(2-hydroxyl alkane acid), phosphoric acid ester is added as catalyst deactivation agent in described liquid phase, devolatilization steps is carried out to described liquid phase, and make described poly-(2-hydroxyl alkane acid) solidification, it is characterized in that, after carrying out devolatilization steps, add catalyst deactivation agent.

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