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A kind of polyester with random hybridization of amide structure and its preparation method

A technology of polyester and amide, which is applied in the field of polyester with random hybridization of amide structure and its preparation. It can solve the problems of film stretching difficulty, operator health injury, rigidity increase and flexibility weakening, etc., and achieve mechanical strength and size Good stability, improved hydrolysis resistance and flexibility, and improved hydrolysis resistance

Active Publication Date: 2021-01-08
扬州帅帅高分子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, in order to improve the hydrolysis resistance of polyester materials, some people realize it by adding antioxidants, such as Chinese patent CN102372909A, but the effect is limited; it needs to be realized by using high molecular weight resin, Japanese patent JP2002-026354 A method for improving the hydrolysis resistance of polyester films by using high-molecular-weight PET resins is disclosed, but the increase in the molecular weight of PET causes difficulties in stretching the films; Improve the hydrolysis resistance of the material (such as Chinese patent CN101983432A), but in the process of production and use, it will release isocyanate and other mucosal irritating products, causing harm to the health of the operator
Chinese patent CN102453255A discloses a semi-aromatic polyamide polyester copolymer and its preparation method. The copolymer has good heat resistance, but the introduction of the benzene ring structure increases the rigidity and weakens the flexibility of the material, and improves the water absorption of the material. , but there is no introduction in the patent about its hydrolysis resistance

Method used

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  • A kind of polyester with random hybridization of amide structure and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of polyester that utilizes amide structure to carry out random hybridization and preparation method thereof, comprises the following steps:

[0033] (1) 1329g terephthalic acid, 236g ethylene glycol, 0.6g ethylene glycol antimony catalyst, 2g silicon dioxide antimony agent and 1g trimethyl phosphate stabilizer were weighed and mixed evenly, and added to a 5L reaction kettle, Stir, introduce nitrogen to exhaust oxygen, repeat 3 times, then pressurize and heat up to carry out preliminary esterification reaction, the reaction temperature is maintained at 240-260°C, and the pressure in the kettle is maintained at about 400kPa.

[0034] (2) After the preliminary esterification reaction finishes, close the process tower valve, add 46.5g hexamethylenediamine and 236g ethylene glycol from the hopper, after deoxygenation, add in the kettle and carry out the secondary esterification reaction, the reaction temperature is at 220- 250°C. After the secondary esterification re...

Embodiment 2

[0038] A kind of polyester that utilizes amide structure to carry out random hybridization and preparation method thereof, comprises the following steps:

[0039] (1) 1329g terephthalic acid, 224g ethylene glycol, 0.8g ethylene glycol antimony catalyst, 3g silicon dioxide antimony agent and 1g trimethyl phosphate stabilizer were weighed and mixed evenly, and added to a 5L reaction kettle, Stir, introduce nitrogen to exhaust oxygen, repeat 3 times, then pressurize and heat up to carry out preliminary esterification reaction, the reaction temperature is maintained at 240-260°C, and the pressure in the kettle is maintained at about 400kPa.

[0040] (2) After the preliminary esterification reaction finishes, close the process tower valve, add 93g hexamethylenediamine and 224g ethylene glycol from the hopper, after deoxygenation, add in the kettle and carry out the secondary esterification reaction, the reaction temperature is at 220-250 ℃. After the secondary esterification react...

Embodiment 3

[0044] A kind of polyester that utilizes amide structure to carry out random hybridization and preparation method thereof, comprises the following steps:

[0045] (1) Weigh 1329g terephthalic acid, 211g ethylene glycol, 1g ethylene glycol antimony catalyst, 3g silicon dioxide antimony agent and 2g trimethyl phosphate stabilizer and mix well, add to 5L reaction kettle, stir , introduce nitrogen to exhaust oxygen, repeat 3 times, then pressurize and heat up to carry out preliminary esterification reaction, the reaction temperature is maintained at 240-260°C, and the pressure in the kettle is maintained at about 400kPa.

[0046] (2) After the initial esterification reaction, close the valve of the process tower, add 140g of hexamethylenediamine and 211g of ethylene glycol from the hopper, after deoxygenation, add it to the kettle for secondary esterification, and the reaction temperature is 220-250 ℃. After the secondary esterification reaction is completed, the pressure in the ...

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Abstract

The invention discloses polyester randomly hybridized by an amide structure and a preparation method of the polyester. The polyester in the invention is characterized by being prepared from the following components by weight: 1000 to 1500 parts of phthalic acid monomer, 260 to 530 parts of dibasic alcohol monomer, 35 to 460 parts of diamine monomer, 0.1 to 2 parts of a catalyst, 0.2 to 2 parts ofa heat stabilizer, and 1 to 5 parts of an opening agent, wherein the dibasic alcohol monomer is linear aliphatic diol, and the diamine monomer is long-chain diamine having 6 or more carbon atoms. Thepolyester in the invention is simple in preparation process; the hydrolysis resistance and the flexibility of the polyester are improved while the mechanical strength of the material is guaranteed.

Description

technical field [0001] The invention relates to the field of polyester synthesis, in particular to a polyester randomly hybridized with an amide structure and a preparation method thereof. Background technique [0002] Polyester has been widely used in recent decades due to its excellent comprehensive performance and low price. The emergence of biaxial stretching technology has pushed the application of polyester film to a new development direction. However, due to the presence of a large number of ester bonds in the polyester molecular chain, which is prone to hydrolysis, the intrinsic viscosity and mechanical properties of the polyester material are reduced, and the service life of the polyester material cannot be guaranteed. Therefore, it is particularly important to improve the hydrolysis resistance of polyester to ensure the service life of the material. [0003] In the prior art, in order to improve the hydrolysis resistance of polyester materials, some people realize...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/44C08G63/183C08G63/78C08J5/18C08L77/12
CPCC08G63/183C08G63/78C08G69/44C08J5/18C08J2377/12
Inventor 白永平高洪伟贺金梅孙帅李卫东
Owner 扬州帅帅高分子科技有限公司
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