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Flame-retardant PET resin and preparation method thereof

A resin and flame retardant technology, applied in the field of flame retardant PET resin, can solve the problems of affecting the fluidity, processability and other physical and chemical properties of the resin, high volatility of phosphorus-based flame retardants, poor resin compatibility, etc. Effects of mechanical properties, improved dispersibility and compatibility, and improved flame retardant properties

Inactive Publication Date: 2020-07-03
肖艳芳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Phosphorus is one of the most effective flame retardant elements for resins. There are a variety of polyphosphorus flame retardants used in the field of resin flame retardants, which can be divided into inorganic phosphorus flame retardants and organic phosphorus flame retardants; inorganic phosphorus flame retardants Flame retardants mainly include red phosphorus, phosphate, etc.; organophosphorus flame retardants mainly include phosphate esters, phosphites, phosphonate esters, organic phosphinate metal salts, etc.; but phosphorus flame retardants also have high volatility, Disadvantages such as poor thermal stability and poor compatibility with resins
In addition, a small amount of nitrogen-based flame retardants, silicone-based flame retardants and inorganic flame retardants are also used in the flame retardant of PET resin, but inorganic flame retardants are often added in large amounts, which further affects the flow of resin Properties, processability and other physical and chemical properties

Method used

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  • Flame-retardant PET resin and preparation method thereof
  • Flame-retardant PET resin and preparation method thereof
  • Flame-retardant PET resin and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A flame-retardant PET resin, consisting of the following raw materials: terephthalic acid, ethylene glycol, a catalyst, and a flame retardant;

[0043] The mol ratio of described terephthalic acid and ethylene glycol is 1:1.15;

[0044] The mass ratio of described catalyzer and terephthalic acid is 1.37:5000, and described catalyzer is ethylene glycol antimony;

[0045] The mass ratio of described terephthalic acid and flame retardant is 8.5:1;

[0046] The flame retardant is ammonium polyphosphate.

[0047] The above-mentioned flame-retardant PET resin is prepared by the following method:

[0048] Y1 esterification stage: Add terephthalic acid, ethylene glycol, catalyst, and flame retardant into the reactor for mixing, inject nitrogen into the reactor, turn on the circulating water, and carry out the esterification reaction. The esterification temperature is controlled at 252°C. The reaction pressure is 0.15MPa, the rotation speed of the stirring paddle is 35r / min, ...

Embodiment 2

[0052] A flame-retardant PET resin, consisting of the following raw materials: terephthalic acid, ethylene glycol, a catalyst, and a flame retardant;

[0053] The mol ratio of described terephthalic acid and ethylene glycol is 1:1.15;

[0054] The mass ratio of described catalyzer and terephthalic acid is 1.37:5000, and described catalyzer is ethylene glycol antimony;

[0055] The mass ratio of described terephthalic acid and flame retardant is 8.5:1;

[0056] The flame retardant is a core-shell composite phosphorus flame retardant.

[0057] The above-mentioned core-shell composite phosphorus flame retardant is prepared by the following method:

[0058] Step 1: Add phosphorus-based flame retardant to deionized water and stir for 20 minutes at a stirring rate of 120rpm. The mass ratio of phosphorus-based flame retardant to deionized water is 20:400 to obtain dispersion A; Step 2: Shell The polysaccharide solution was added to the dispersion A at a rate of 2mL / min and stirred...

Embodiment 3

[0067] A flame-retardant PET resin, consisting of the following raw materials: terephthalic acid, ethylene glycol, a catalyst, and a flame retardant;

[0068] The mol ratio of described terephthalic acid and ethylene glycol is 1:1.15;

[0069] The mass ratio of described catalyzer and terephthalic acid is 1.37:5000, and described catalyzer is ethylene glycol antimony;

[0070] The mass ratio of described terephthalic acid and flame retardant is 8.5:1;

[0071] The flame retardant is a core-shell composite phosphorus flame retardant.

[0072] The above-mentioned core-shell composite phosphorus flame retardant is prepared by the following method:

[0073] Step 1: Add phosphorus-based flame retardant to deionized water and stir for 20 minutes at a stirring rate of 120rpm. The mass ratio of phosphorus-based flame retardant to deionized water is 20:400 to obtain dispersion A; Step 2: Shell The polysaccharide solution was added to the dispersion A at a rate of 2mL / min and stirred...

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Abstract

The invention discloses flame-retardant PET resin and a preparation method thereof. The flame-retardant PET resin is prepared from the following raw materials: terephthalic acid, ethylene glycol, a catalyst and a flame retardant, wherein the molar ratio of the terephthalic acid to the ethylene glycol is 1: (1.05-1.35); the mass ratio of the catalyst to the terephthalic acid is (0.5-5): 5000; the catalyst is ethylene glycol antimony or antimonous oxide; the mass ratio of the terephthalic acid to the flame retardant is (5-15): 1; and the flame retardant is a phosphorus-based flame retardant or acore-shell type composite phosphorus-based flame retardant. The flame-retardant PET resin disclosed by the invention has good flame-retardant property.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a flame-retardant PET resin. Background technique [0002] PET resin is a milky white or light yellow, highly crystalline polymer with good fiber-forming properties, wear resistance, electrical insulation, etc. It is widely used in fibers, packaging bottles, films, engineering plastics, etc. However, PET resin also has problems such as poor toughness, opacity, poor air permeability, and flammability, especially the shortcomings of flammability have brought great fire hazards to the application of PET resin. [0003] The flame retardants commonly used in PET resin mainly include halogen flame retardants, phosphorus flame retardants and other flame retardants. Halogenated flame retardants are the earliest flame retardants for resins. However, when they are burned, they will produce corrosive gases such as hydrogen halides and polybrominated dibenzofurans, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/86C08K9/10C08K3/32C08K5/523
CPCC08G63/183C08G63/866C08K3/32C08K5/523C08K9/10C08K2003/323
Inventor 肖艳芳
Owner 肖艳芳