Continuous polymerization method for polyether ester copolymer

A technology of copolymer and polyether ester, which is applied in the field of continuous polymerization of polyether ester copolymer, can solve the problems of low production efficiency and unstable product quality, and achieve large output, good product quality stability, and easy large-scale production The effect of production

Active Publication Date: 2012-10-17
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to provide a method for continuous polymerization of polyether ester copolymers to solve the technical problems of unstable product quality and low production efficiency in batch polymerization in the prior art

Method used

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  • Continuous polymerization method for polyether ester copolymer
  • Continuous polymerization method for polyether ester copolymer
  • Continuous polymerization method for polyether ester copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Polyether ester is prepared by the method for continuous polymerization of polyether ester copolymer provided by the invention

[0035]With the 3 tons of small-scale low-temperature short-process continuous polyester polycondensation production equipment produced by Shanghai Petrochemical Company as equipment, terephthalic acid (PTA), butanediol (BG) and tetrahydrofuran homopolyether with a molecular weight of 800-2000 are used as raw materials. Using tetrabutyl titanate as a catalyst to continuously produce co-condensed polyether ester. Add terephthalic acid and butanediol to the reaction kettle at a ratio of 1:2.2 to carry out esterification reaction. The temperature of the esterification reaction is 250-260° C., and the reaction time is 20 minutes to obtain the esterification reaction product BHBT: heat exchange the esterification reaction product through a heat exchanger connected to the reactor to obtain the first melt with a temperature of 228-232°C, and then the ...

Embodiment 2

[0049] With the 3 tons of small-scale low-temperature short-process continuous polyester polycondensation production equipment produced by Shanghai Petrochemical Company as equipment, terephthalic acid (PTA), butanediol (BG) and tetrahydrofuran homopolyether with a molecular weight of 800-2000 are used as raw materials. Using tetrabutyl titanate as a catalyst to continuously produce co-condensed polyether ester. Add terephthalic acid and butanediol to the reaction kettle at a ratio of 1:2.2 to carry out esterification reaction. The temperature of the esterification reaction is 250-260° C., and the reaction time is 20 minutes to obtain the esterification reaction product BHBT; heat exchange the esterification reaction product through a heat exchanger connected to the reactor to obtain the first melt with a temperature of 225-235°C, and then the first melt enters the homogenizer; wherein, the heat exchanger passes through The heat medium circulates the hot oil, and the hot oil e...

Embodiment 3

[0055] With the 3 tons of small-scale low-temperature short-process continuous polyester polycondensation production equipment produced by Shanghai Petrochemical Company as equipment, terephthalic acid (PTA), butanediol (BG) and tetrahydrofuran homopolyether with a molecular weight of 800-2000 are used as raw materials. Using tetrabutyl titanate as a catalyst to continuously produce co-condensed polyether ester. Add terephthalic acid and butanediol to the reaction kettle at a material ratio of 1:2.1 for esterification reaction, the temperature of the esterification reaction is 250-260°C, and the reaction time is 60 minutes to obtain the esterification reaction product BHBT; heat exchange the esterification reaction product through a heat exchanger connected to the reactor to obtain the first melt with a temperature of 225-235°C, and then the first melt enters the homogenizer; wherein, the heat exchanger passes through The heat medium circulates the hot oil, and the hot oil ent...

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Abstract

The invention discloses a continuous polymerization method for polyether ester copolymer. The method comprises the steps of adding terephthalic acid and butanediol into a reaction kettle for carrying out esterification reaction, thus obtaining esterification reaction product; carrying out heat exchange between the esterification reaction product with a heat exchanger connected with the reaction kettle to obtain a first fondant at temperature of 225-235 DEG C, wherein the first fondant enters a homogenizing mixer; leading the tetrahydrofuran homopolymerize ether with the molecular weight 800-2000 to sequentially pass through a fusion kettle and a metering pump and enter the homogenizing mixer, evenly mixing the tetrahydrofuran homopolymerize ether and the first fondant to obtain a second fondant; and leading the second fondant to enter a polycondensation kettle and generate a polycondensation reaction, wherein the polycondensation kettle is of a multistage polycondensation kettle. The technical scheme is applied to prepare the polyether ester copolymer, and the continuous polymerization is adopted, thus having the advantages of low energy consumption, large yield, easiness for large-scale production and good quality and stability of products.

Description

technical field [0001] The invention relates to the field of chemical synthesis, in particular to a method for continuous polymerization of polyether ester copolymers. Background technique [0002] Polyetherester thermoplastic elastomer is a material with both rubber and thermoplastic properties. It exhibits rubber properties at room temperature and can be plasticized at high temperatures. It is based on the PBT block with high crystallinity and high melting point as the hard segment, and the polyether with a lower glass transition temperature as the soft satin. The rigidity, polarity and crystallinity of the hard segment PBT of the polyether ester thermoplastic elastomer make it It has good high temperature performance and oil and solvent resistance. The low glass transition temperature and saturation of soft segment polyether make it have excellent low temperature performance and anti-aging performance. [0003] The purpose of the initial research and development of poly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/672C08G63/78
Inventor 刘伯林金剑张魁
Owner CHINESE TEXTILE ACAD
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