Modified PET resin and preparation method thereof

A modification and resin technology, applied in the field of polymer materials, can solve the problems of poor hygroscopicity of PET materials, poor toughness of PET materials, poor air permeability, etc., and achieve the effects of being conducive to popularization and application, reducing dimensional resistance, and simple preparation methods

Active Publication Date: 2020-07-28
HEBEI HUAMI RUBBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the steric hindrance effect of the benzene ring, the ester group in the PET macromolecular chain cannot exert its adsorption effect on moisture, which makes the hygroscopicity of the PET material poor; in addition, the PET material also has poor toughness, opacity, poor air permeability, In view of the above problems such as flammability, the thermal properties, crystallization properties and mechanical properties of PET materials can be improved by physical and chemical modification methods.

Method used

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  • Modified PET resin and preparation method thereof

Examples

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Effect test

Embodiment 1

[0039] A modified PET resin, consisting of the following raw materials: terephthalic acid, ethylene glycol, catalyst, auxiliary agent, third monomer polyol;

[0040] The mol ratio of described terephthalic acid and ethylene glycol is 1:1.28;

[0041] The addition of described catalyzer is the 200ppm of terephthalic acid weight, and described catalyzer is ethylene glycol antimony;

[0042] The addition of described auxiliary agent is 16 times of catalyst weight; Described auxiliary agent is the ethylene glycol solution of trimethyl phosphate, and the weight fraction of trimethyl phosphate in the ethylene glycol solution of described trimethyl phosphate is 1600ppm ;

[0043] The added amount of the third monomeric polyol is 600 ppm of the molar weight of ethylene glycol; the third monomeric polyol is glycerol.

[0044] Above-mentioned modified PET resin is prepared by following method:

[0045] Y1 esterification stage: Add terephthalic acid, ethylene glycol, catalyst, additiv...

Embodiment 2

[0049] A modified PET resin, consisting of the following raw materials: terephthalic acid, ethylene glycol, catalyst, auxiliary agent, third monomer polyol;

[0050] The mol ratio of described terephthalic acid and ethylene glycol is 1:1.28;

[0051] The addition of described catalyzer is the 200ppm of terephthalic acid weight, and described catalyzer is ethylene glycol antimony;

[0052] The addition of described auxiliary agent is 16 times of catalyst weight; Described auxiliary agent is the ethylene glycol solution of trimethyl phosphate, and the weight fraction of trimethyl phosphate in the ethylene glycol solution of described trimethyl phosphate is 1600ppm ;

[0053] The added amount of the third monomer polyol is 600ppm of the molar weight of ethylene glycol; the third monomer polyol is sorbitol.

[0054] Above-mentioned modified PET resin is prepared by following method:

[0055] Y1 esterification stage: Add terephthalic acid, ethylene glycol, catalyst, additives, and...

Embodiment 3

[0059] A modified PET resin, consisting of the following raw materials: terephthalic acid, ethylene glycol, catalyst, auxiliary agent, third monomer polyol;

[0060] The mol ratio of described terephthalic acid and ethylene glycol is 1:1.28;

[0061] The addition of described catalyzer is the 200ppm of terephthalic acid weight, and described catalyzer is ethylene glycol antimony;

[0062] The addition of described auxiliary agent is 16 times of catalyst weight; Described auxiliary agent is the ethylene glycol solution of trimethyl phosphate, and the weight fraction of trimethyl phosphate in the ethylene glycol solution of described trimethyl phosphate is 1600ppm ;

[0063] The added amount of the third monomeric polyol is 600 ppm of the molar weight of ethylene glycol; the third monomeric polyol is a mixture of glycerol and sorbitol in a molar ratio of 1:3.

[0064] Above-mentioned modified PET resin is prepared by following method:

[0065] Y1 esterification stage: Add ter...

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Abstract

The invention discloses a modified PET resin and a preparation method thereof, the modified PET resin is prepared from the following raw materials: terephthalic acid, ethylene glycol, a catalyst, an auxiliary agent, and a third monomer polyol, wherein the molar ratio of terephthalic acid to ethylene glycol is 1 (1.02-1.32). The addition amount of the catalyst is 190-320ppm of the weight of terephthalic acid, and the catalyst is ethylene glycol antimony. The addition amount of the auxiliary agent is 10-30 times of the weight of the catalyst. The auxiliary agent is an ethylene glycol solution oftrimethyl phosphate, and the weight fraction of trimethyl phosphate in the ethylene glycol solution of trimethyl phosphate is 1500-2500ppm. The addition amount of the third monomer polyol is 500-1500ppm of the molar weight of the ethylene glycol, and the third monomer polyol is at least one of glycerol, xylitol and sorbitol. The modified PET resin polyester provided by the invention has good thermal performance.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to modified PET resin. Background technique [0002] PET, that is, polyethylene terephthalate, is a milky white or light yellow, highly crystalline polymer with a smooth and shiny surface, good fiber-forming properties, abrasion resistance, low water absorption, electrical insulation and Low price and other advantages have attracted much attention. In the early days, PET was almost used for synthetic fibers. Since the 1980s, PET has made breakthroughs as engineering plastics. Nucleating agents and crystallization accelerators have been developed successively. Currently, PET is used in fibers, packaging bottles, Films, engineering plastics, etc. have been widely used, and the output is much higher than other thermoplastic polyesters. [0003] However, due to the steric hindrance effect of the benzene ring, the ester group in the PET macromolecular chain cannot ...

Claims

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Application Information

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IPC IPC(8): C08G63/20C08G63/672C08G63/78
CPCC08G63/20C08G63/672C08G63/78
Inventor 肖艳芳
Owner HEBEI HUAMI RUBBER
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