Extrusion blow molded pet resin and preparation method thereof
A technology of resin and ethylene glycol, which is applied in the field of PET resin, can solve the problems of inability to extrude and blown into film and low melt strength of PET, and achieve the effects of low production equipment, long film making cycle and improved melt strength
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Embodiment 1
[0030] The components of the extrusion blow-molded PET resin include: a molar ratio of terephthalic acid: ethylene glycol of 1:1.25, a total of 22 kg, 20 g of dipentaerythritol, 2 g of a titanium-based catalyst, and 10 g of a phosphoric acid ethylene glycol solution.
[0031] The preparation method of the PET resin of extrusion blow molding comprises the following steps:
[0032] Esterification stage: add the components of PET resin to a 50L reactor, beat at 300KPa and 80°C for 10min, then heat up to 240°C for esterification reaction for 2h, after the end of esterification, slowly release the pressure to react The pressure in the kettle drops to normal pressure;
[0033] Prepolymerization stage: vacuumize the reactor, reduce the pressure in the reactor from normal pressure to 1KPa, and raise the temperature of the reactor to 260°C;
[0034] Polycondensation stage: continue to vacuum the reaction kettle to 80Pa, react for 60min, discharge and cut into pellets;
[0035] Thicke...
Embodiment 2
[0037] The components of the extrusion blow molded PET resin include: the molar ratio of terephthalic acid: ethylene glycol is 1:1.25, a total of 22kg, sorbitol 23g, Sb 2 O 3 4.2g, 42g of ethylene glycol solution of phosphoric acid.
[0038] The preparation method of the PET resin of extrusion blow molding comprises the following steps:
[0039] Esterification stage: add the components of PET resin into a 50L reaction kettle, beat at 250KPa and 70°C for 10min, then heat up to 240°C for esterification for 1.5h. The pressure in the reactor is reduced to normal pressure;
[0040] Prepolymerization stage: vacuumize the reactor, reduce the pressure in the reactor from normal pressure to 1.0KPa, and raise the temperature of the reactor to 260°C;
[0041] Polycondensation stage: continue to vacuumize the reactor to 50Pa, react for 60min, discharge and cut into pellets;
[0042] Thickening stage: put the obtained pellets into a solid-phase viscosity increasing reactor, and react ...
Embodiment 3
[0044] The components of the extrusion blow molded PET resin include: the molar ratio of terephthalic acid: ethylene glycol is 1:1.25, a total of 22kg, tetraol 13.7g, Sb2 O 3 4.2g, 42g of ethylene glycol solution of phosphoric acid.
[0045] The preparation method of the PET resin of extrusion blow molding comprises the following steps:
[0046] Esterification stage: add the components of PET resin to a 50L reactor, beat at 350KPa and 90°C for 15min, then heat up to 245°C for esterification reaction for 3h, after the end of the esterification, slowly release the pressure, and the reaction The pressure in the kettle is reduced to normal pressure;
[0047] Prepolymerization stage: vacuumize the reactor, reduce the pressure in the reactor from normal pressure to 1.1KPa, and raise the temperature of the reactor to 265°C;
[0048] Polycondensation stage: continue to vacuum the reaction kettle to 80Pa, react for 50min, discharge and cut into pellets;
[0049] Thickening stage: p...
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