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Modified pet resin and preparation method thereof

A resin and modification technology, applied in the field of polymer materials, can solve the problems of poor hygroscopicity, poor toughness and opacity of PET materials, and achieve the effects of improving optical properties, reducing steric resistance and reducing crystallinity.

Active Publication Date: 2022-08-02
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 is composed of the following raw materials: terephthalic acid, ethylene glycol, a catalyst, an auxiliary agent, and a third monomer polyol;

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

[0041] The add-on of the catalyst is 200 ppm by weight of terephthalic acid, and the catalyst 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 monomer polyol is 600 ppm of the molar amount of ethylene glycol; the third monomer polyol is glycerol.

[0044] The above-mentioned modified PET resin is prepared by the following method:

[0045] Y1 esterification stage: terephthalic acid, ethylene glycol, catalyst, auxiliary ag...

Embodiment 2

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

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

[0051] The add-on of the catalyst is 200 ppm by weight of terephthalic acid, and the catalyst 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 600 ppm of the molar amount of ethylene glycol; the third monomer polyol is sorbitol.

[0054] The above-mentioned modified PET resin is prepared by the following method:

[0055] Y1 esterification stage: terephthalic acid, ethylene glycol, catalyst, auxiliary agen...

Embodiment 3

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

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

[0061] The add-on of the catalyst is 200 ppm by weight of terephthalic acid, and the catalyst 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 monomer polyol is 600 ppm of the molar amount of ethylene glycol; the third monomer polyol is a compound of glycerol and sorbitol in a molar ratio of 1:3.

[0064] The above-mentioned modified PET resin is prepared by the following method:

[0065] Y1 esterification stage: terepht...

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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; The mol ratio of described terephthalic acid and ethylene glycol is 1:(1.02-1.32). The added amount of the catalyst is 190-320 ppm of the weight of terephthalic acid, the catalyst is ethylene glycol antimony; the added amount of the auxiliary agent is 10-30 times the weight of the catalyst; the auxiliary agent is trimethyl phosphate The ethylene glycol solution of the ester, the weight fraction of the trimethyl phosphate in the ethylene glycol solution of the trimethyl phosphate is 1500~2500ppm; the addition amount of the third monomer polyol is 500 ppm of the ethylene glycol molar amount. ~1500ppm; the third monomer polyol is at least one of glycerol, xylitol, and sorbitol. The modified PET resin polyester of the present invention has better thermal properties.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and particularly relates to modified PET resin. Background technique [0002] PET, namely 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 The advantages of 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 a breakthrough as an engineering plastic. Nucleating agents and crystallization accelerators have been developed one after another. 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 play a role in adsorbing moist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/20C08G63/672C08G63/78
CPCC08G63/20C08G63/672C08G63/78
Inventor 肖艳芳
Owner HEBEI HUAMI RUBBER
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