Polymerization method of polyester resin

Polymerization method of polyester resin

  • CN 103,772,671 A
  • Filed: 10/25/2012
  • Published: 05/07/2014
  • Est. Priority Date: 10/25/2012
  • Status: Active Application
First Claim
Patent Images

1. a polymerization process for vibrin, comprises the following steps:

  • A) take di-carboxylic acid and dibasic alcohol as raw material, it is 230~

    280 ℃

    in temperature of reaction, reaction pressure is to carry out esterification under normal pressure~

    0.5MPa condition, obtain prepolymer, then be 250~

    320 ℃

    in temperature of reaction, reaction pressure is to be less than under the vacuum condition of 150Pa, to carry out melt polycondensation reaction and obtain polyester product;

    The catalyzer using comprises that following raw material is in 0~

    200 ℃

    of reaction reaction product of 0.5~

    10 hour;

    (1) there is the titanium compound A of following general formula;

    Ti(OR) 4R is straight chain or the branched-alkyl that is selected from 1~

    10 carbon atom;

    (2) be selected from the dibasic alcohol B with 2~

    10 carbon atoms;

    (3) be selected from least one the metallic compound C of IA in the periodic table of elements;

    (4) be selected from least one the aliphatics organic acid D in organic acid;

    (5) be selected from least one the phosphate compound E in phosphorus compound;

    (6) be selected from least one the metallic compound F in IIA in the periodic table of elements, IB, IIB, VIIB, VIII;

    Wherein, the mol ratio of dibasic alcohol B and titanium compound A is 1~

    8;

    1;

    The mol ratio of metallic compound C and titanium compound A is 0.1~

    10;

    1;

    The mol ratio of aliphatics organic acid D and titanium compound A is 1~

    20;

    1;

    The mol ratio of phosphate compound E and titanium compound A is >

    0~

    10;

    1;

    The mol ratio of metallic compound F and titanium compound A is 0.1~

    20;

    1;

    Before polycondensation, add at least one the metallic compound G being selected from IIA in the periodic table of elements, IB, IIB, VIIB, VIII as promotor, the weight that the consumption of metallic compound G obtains polyester product based on melt polycondensation reaction is 1~

    100ppm;

    B) polyester product melt phase polycondensation being obtained, after pre-crystallized processing, is 200~

    250 ℃

    in temperature of reaction, and reaction pressure is to be less than under the condition of 100Pa to carry out solid state polymerization is greater than 0.9 deciliter/gram polyester to obtain limiting viscosity.

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