Polyester elastomer and preparation method thereof
A technology of polyester elastomer and esterification reaction, applied in the field of polyester elastomer and its preparation, can solve problems such as high glass transition temperature, and achieve the effects of good resilience, low glass transition temperature and excellent tensile properties
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[0014] The preparation method of the polyester elastomer provided by the present invention includes: reacting a mixture containing a dicarboxylic acid (ester) and a glycol under the conditions of an esterification reaction and / or a transesterification reaction; under the conditions of a polycondensation reaction, In the presence of a polycondensation catalyst, the product after the esterification reaction and / or the transesterification reaction is subjected to a polycondensation reaction; wherein the dicarboxylic acid (ester) contains succinic acid (ester), isophthalic acid (ester) and Terephthalic acid (ester), the diol contains ethylene glycol.
[0015] In the present invention, the dicarboxylic acid (ester) means dicarboxylic acid and / or dicarboxylic acid ester, and similarly, the succinic acid (ester) means succinic acid and / or succinate The isophthalic acid (ester) means isophthalic acid and / or isophthalic acid ester, and the terephthalic acid (ester) means terephthalic acid...
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[0052] Example 1
[0053] Add 16.6g (0.1mol) of isophthalic acid, 166g (1.0mol) of terephthalic acid, 93g (1.5mol) of ethylene glycol, 13g (0.11mol) of succinic acid and ethane into the batch reactor. Antimony diol (based on the weight of the above-mentioned dicarboxylic acid (ester), the amount is 0.01% by weight), esterification and transesterification at 220-250°C and a pressure of 0.25 MPa are completed after 1 hour, and the reaction kettle After releasing the pressure to normal pressure, adding trimethyl phosphate (based on the weight of the product after the esterification and transesterification reaction, the amount is 0.1% by weight), gradually reduce the pressure and increase the temperature, under the conditions of 200°C and 30kPa After polycondensation for 0.5 hours, continue to heat up and depressurize. After 45 minutes, the reactor vacuum will reach 1500Pa. The reaction temperature will be maintained at 250~260℃. After 110 minutes of polymerization, the polymerizatio...
Example Embodiment
[0054] Example 2
[0055] Add 16.6g (0.1mol) of isophthalic acid, 62.0g (1.0mol) of ethylene glycol, 106g (0.9mol) of succinic acid and magnesium acetate into the batch reactor (based on the weight of the above-mentioned dicarboxylic acid). As a reference, the amount is 0.1% by weight), replaced with nitrogen three times, and the esterification is completed after the transesterification is performed at 160-240°C under normal pressure for 10 hours. Then add phosphoric acid (based on the weight of the product after esterification and transesterification reaction, the amount is 0.5% by weight), ethylene glycol antimony (based on the weight of the above-mentioned dicarboxylic acid (ester), the amount is 0.03% by weight) ) After stirring uniformly, gradually reduce the pressure and increase the temperature, and polycondensate at 220°C and 10kPa for 4 hours. Then, continue to increase the temperature and reduce pressure. After 15 minutes, the reactor vacuum reaches 90Pa, and the reacti...
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