A synthetic method of resin used for a degradable membrane material having a high molecular-weight and high barrier performance

A synthetic method of resin used for a degradable membrane material having a high molecular-weight and high barrier performance

  • CN 106,633,014 A
  • Filed: 09/30/2016
  • Published: 05/10/2017
  • Est. Priority Date: 09/30/2016
  • Status: Active Application
First Claim
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1. a kind of HMW, the synthetic method of high barrier degradable membrane material resin, it is characterised in that comprising following stepSuddenly:

  • (1) Esterification Stage:

    Under nitrogen protection, AA and BDO are added according to a certain percentage in melt polycondensation reaction kettle, starts to addHeat opens stirring to 100 DEG C, adds chain extender, esterification catalyst, setting ladder-elevating temperature to make material carry out progressively ester to 170 DEG CChange reaction, the 108%-130% of theoretical value is reached to reaction water yield, be as esterified terminal;

    (2) the ester exchange stage:

    NDC, BDO, ester exchange catalyst are added, heating mode is set, ester exchange is carried out at 185 DEG C firstReaction, the reaction later stage is suitably warming up to 195 DEG C, to going out 10%-20% of the quantity of methyl alcohol more than theoretical value, as ester exchange terminal;

    (3) polycondensation phase:

    After ester exchange reaction reaches terminal, polycondensation antioxidant, polycondensation catalysis are added in batch condensation polymerization reactorAgent, rises high-temperature and is slowly evacuated to below high vacuum 500Pa, keeps reaction temperature polycondensation reaction 1-3 hours at 245-260 DEG C.

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