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

Inactive Publication Date: 2016-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, such copolyesters still hav

Method used

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  • Polyester elastomer and preparation method thereof

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Example Embodiment

[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...

Example Embodiment

[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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Abstract

The invention discloses a polyester elastomer and a preparation method thereof. The method comprises the following steps: under condition of an esterification reaction and/or an ester interchange reaction, a dicarboxylic acid (ester) and dihydric alcohol-containing mixture is reacted; under condensation polymerization condition and existence of a polycondensation catalyst, the products after the esterification reaction and/or the ester interchange reaction; eherein, the dicarboxylic acid (ester) contains succinic acid (ester), isophthalic acid (ester) and terephthalic acid (ester), and dihydric alcohol contains glycol. The polyester elastomer has good biodegradability, has excellent stretching performance and rebound performance.

Description

technical field [0001] The invention relates to a polyester elastomer and a preparation method thereof. Background technique [0002] Elastomer refers to a polymer compound with glass transition temperature lower than room temperature, elongation at break > 50%, and good recovery after external force is withdrawn. According to whether the elastomer can be plasticized, it can be divided into two categories: thermosetting elastomer and thermoplastic elastomer. [0003] Polyethylene terephthalate (PET) is generally used as a thermoplastic material. It has excellent performance in mechanical properties such as crystallinity and strength, chemical resistance, heat resistance, electrical properties, and transparency. It is used in films, fibers, It is widely used in various purposes such as bottles and extruded products. The production capacity of polyethylene terephthalate in my country has reached 25 million tons. In some applications that are not easy to recycle, it is prec...

Claims

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Application Information

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IPC IPC(8): C08G63/183C08G63/181C08G63/20C08G63/52C08G63/78
Inventor 计文希张龙贵祝桂香殷建军许宁韩翎张伟
Owner CHINA PETROLEUM & CHEM CORP
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