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Oxygen absorbing type polyester resin, preparation method thereof, and high gas barrier product

A technology of polyester resin and polyester, which is applied in the field of oxygen-absorbing polyester resin and its preparation, can solve the problems of difficulty in controlling the dispersion uniformity of nanoparticles, high activity of nanoparticles, and high cost of nanomaterials, and it is easy to control the process conditions , simple process and flexible design

Pending Publication Date: 2020-04-10
CHINA RESOURCES PACKAGING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, the cost of nanomaterials prepared by nanocomposite modification is high, the activity of nanoparticles is high and unstable, and the dispersion uniformity of nanoparticles in polymers is difficult to control

Method used

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  • Oxygen absorbing type polyester resin, preparation method thereof, and high gas barrier product
  • Oxygen absorbing type polyester resin, preparation method thereof, and high gas barrier product

Examples

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Effect test

Embodiment 1

[0054] The reaction device adopts a polyester reactor with a volume of 20 liters, and the reaction process is a direct esterification method. Adjust terephthalic acid (PTA), ethylene glycol (EG) and ethylene glycol antimony into slurry, wherein the molar ratio of ethylene glycol (EG) to terephthalic acid (PTA) is 1.3:1. The slurry enters the esterification reactor for esterification reaction to obtain esterified products, wherein the esterification reaction temperature is 260°C, the reaction pressure is 0.25Mpa, and the reaction time is 3 hours;

[0055] Add 5% epoxy-modified polyisoprene (that is, the amount of epoxy-modified polyisoprene / (the amount of epoxy-modified polyisoprene+the amount of esterified product) in the kettle after esterification finishes )=5%), the pressure in the kettle was slowly reduced to 1000Pa, and the reaction temperature was 260°C for pre-condensation, and the pre-condensation reaction time was 1 hour. After the pre-condensation, the reaction pres...

Embodiment 2

[0060] The reaction device adopts a polyester reactor with a volume of 20 liters, and the reaction process is a direct esterification method. Adjust terephthalic acid (PTA), ethylene glycol (EG) and ethylene glycol antimony into slurry, wherein the molar ratio of ethylene glycol (EG) to terephthalic acid (PTA) is 1.3:1. The slurry enters the esterification reactor for esterification reaction to obtain esterified products, wherein the esterification reaction temperature is 260°C, the reaction pressure is 0.25Mpa, and the reaction time is 3 hours;

[0061] Add 10% epoxy-modified polyisoprene (that is, the amount of epoxy-modified polyisoprene / (the amount of epoxy-modified polyisoprene+the amount of esterified product) in the kettle after esterification finishes )=10%), the pressure in the kettle is slowly reduced to 1000Pa, the reaction temperature is 260°C, and pre-condensation is carried out, and the pre-condensation reaction time is 1 hour. After the pre-condensation, the re...

Embodiment 3

[0063] The reaction device adopts a polyester reactor with a volume of 20 liters, and the reaction process is a direct esterification method. Adjust terephthalic acid (PTA), 1,4-butanediol, and tetraisobutyl titanate into slurry, wherein the molar ratio of 1,4-butanediol to terephthalic acid (PTA) is 1.3: 1. The slurry enters the esterification reactor for esterification reaction to obtain esterified products, wherein the esterification reaction temperature is 240°C, the reaction pressure is 0.15Mpa, and the reaction time is 3 hours;

[0064] Add 5% epoxy-modified polyisoprene (that is, the amount of epoxy-modified polyisoprene / (the amount of epoxy-modified polyisoprene+the amount of esterified product) in the kettle after esterification finishes )=5%), the pressure in the kettle was slowly reduced to 1000Pa, and the reaction temperature was 245°C for pre-condensation, and the pre-condensation reaction time was 1 hour. After the pre-condensation, the reaction pressure is low...

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Abstract

The invention discloses a preparation method of an oxygen absorbing type polyester resin, an oxygen absorbing type polyester resin, and a high gas barrier product. The preparation method comprises following steps: an esterification step: preparing slurry from a dibasic acid, a dibasic alcohol, and a catalyst, and carrying out esterification reactions to obtain an esterification product; and a polymerization step: adding modified polyolefin into the esterification product to obtain a mixture, carrying out polymerization, and then performing cooling, cutting, and drying to obtain polyester resin. The high gas barrier product prepared from the oxygen absorbing type polyester resin has an excellent gas barrier performance.

Description

technical field [0001] The invention relates to the technical field of resins, in particular to an oxygen-absorbing polyester resin and a preparation method thereof. Background technique [0002] Polyester such as polyethylene terephthalate (PET) has many advantages such as high transparency, good heat resistance, high mechanical strength, recyclable reuse and low cost, and is widely used in food and beverage packaging. However, ordinary polyester films and containers widely used in the field of food packaging are not ideal for gas barrier properties. For this reason, many packaging manufacturers use materials with excellent barrier properties (such as EVOH and MXD6) to compound polyester, such as the current Common three-layer, five-layer or even seven-layer polyester composite films on the market. Although the purpose of improving the barrier property of packaging can be achieved by compounding, it will virtually increase the packaging cost of food and beverage manufactur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02C08G63/183C08G63/86C08G63/85C08J5/18C08L67/02
CPCC08G63/183C08G63/85C08G63/866C08G81/027C08J5/18C08J2367/02
Inventor 吴逸昌胡广君朱振达
Owner CHINA RESOURCES PACKAGING MATERIALS CO LTD