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Preparation of a phosphorus-magnesium composite flame retardant and its application in the preparation of flame retardant copolyester materials

A compound flame retardant, flame retardant copolyester technology, applied in the fields of polymer materials and flame retardant materials, can solve the problems of scalding, poor thermal stability, high price, reduce dosage, improve flame retardant performance and mechanical performance, Enhanced thermal insulation

Active Publication Date: 2021-04-20
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-efficiency organophosphorus flame retardants have a good char formation effect, can prolong the ignition time, reduce the heat release rate of materials, and delay the flame propagation speed, but such organophosphorus flame retardants are expensive and have poor thermal stability. It is by promoting the droplet to take away heat, which is easy to cause burns or ignite other substances

Method used

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  • Preparation of a phosphorus-magnesium composite flame retardant and its application in the preparation of flame retardant copolyester materials
  • Preparation of a phosphorus-magnesium composite flame retardant and its application in the preparation of flame retardant copolyester materials
  • Preparation of a phosphorus-magnesium composite flame retardant and its application in the preparation of flame retardant copolyester materials

Examples

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Effect test

Embodiment 1

[0032] (1) Preparation of phosphorus-magnesium flame retardant: Weigh 10g of 2-carboxyethyl-phenylphosphinic acid, dissolve it in a mixed solution of 200mL distilled water and 200mL absolute ethanol, heat up to 60°C, add 4g hydrotalcite, and continue React for 4 hours; remove the distilled water after the reaction, and dry under vacuum at 80°C to obtain a phosphorus-magnesium flame retardant;

[0033] (2) Preparation of phosphorus-magnesium flame-retardant copolyester composite material: Take 403.4g of ethylene glycol, 830.6g of terephthalic acid, and 0.29g of antimony trioxide, and add them to a 1.5L reaction kettle, and then add 6.2g Phosphorus-magnesium flame retardant, check the airtightness of the system, pass in nitrogen to discharge the air in the kettle, and carry out esterification reaction at a temperature of 220°C and a pressure of 0.2MPa. When the column top temperature is lower than 100°C, after the esterification is complete, the system enters the vacuum polyconden...

Embodiment 2

[0036] (1) Preparation of phosphorus-magnesium flame retardant: Take 47g of 9,10-dihydro-9-oxa-10-phosphophenanthrene-succinic acid, dissolve it in a mixed solution of 400mL distilled water and 400mL absolute ethanol, Raise the temperature to 65°C, add 4g of magnesium hydroxide, and continue the reaction for 2 hours; after the reaction, remove the distilled water and dry under vacuum at 80°C to obtain a phosphorus-magnesium flame retardant;

[0037] (2) Preparation of phosphorus-magnesium flame-retardant copolyester composite material: Take 403.4g of ethylene glycol, 830.6g of terephthalic acid, and 0.29g of antimony trioxide, and add them to a 1.5L reaction kettle, and then add 12.3g Phosphorus-magnesium flame retardant, check the airtightness of the system, let in nitrogen to discharge the air in the kettle; carry out the esterification reaction at a temperature of 230°C and a pressure of 0.25MPa. When the column top temperature is lower than 100°C, after the esterification ...

Embodiment 3

[0040] (1) Preparation of phosphorus-magnesium flame retardant: Take 30g of aminotrimethylene phosphonic acid, dissolve it in a mixed solution of 250mL of distilled water and 250mL of absolute ethanol, raise the temperature to 70°C, then add 8g of magnesium hydroxide, and continue the reaction for 4h After the reaction, the distilled water was removed and dried under vacuum at 80°C to obtain a phosphorus-magnesium flame retardant;

[0041] (2) Preparation of flame-retardant copolyester composite material: Take 403.4g of ethylene glycol, 830.6g of terephthalic acid, and 0.29g of antimony trioxide, and add them to a 1.5L reaction kettle, and then add 18.5g of phosphorus-magnesium Flame retardant, check the airtightness of the system, pass in nitrogen to discharge the air in the kettle, and carry out esterification reaction at a temperature of 235°C and a pressure of 0.3MPa. When the column top temperature is lower than 100°C, after the esterification is complete, the system ente...

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Abstract

The invention provides a method for preparing a phosphorus-magnesium composite flame retardant, which comprises dissolving organic phosphoric acid in a mixed solution of distilled water and absolute ethanol, raising the temperature to 60-80°C, adding inorganic particles, and continuing the reaction for 1-6 hours; After the reaction, the distilled water is removed and dried to obtain the phosphorus-magnesium composite flame retardant. The invention combines the inorganic particles with the organophosphorus flame retardant, utilizes the synergistic effect between the flame retardants, and enhances the heat insulation, oxygen insulation and flame retardant effects of the flame retardant. Applying it to the preparation of copolyester composite materials effectively improves the flame retardant and mechanical properties of copolyester composite materials, reduces the amount of flame retardants, and can also play the role of anti-droplet, which can be widely used Used in fiber, engineering plastics, film and other fields.

Description

technical field [0001] The invention relates to the preparation of a phosphorus-magnesium composite flame retardant. The invention also relates to the application of the phosphorus-magnesium composite flame retardant in the preparation of flame-retardant copolyester materials, which belongs to the technical field of flame-retardant materials and polymer material technology field. Background technique [0002] With the rapid development of my country's economy, rubber, fiber, plastic and other synthetic polymer materials are applied to all aspects of the national economy. Polyethylene terephthalate is a linear thermoplastic material, which is widely used in the fields of fibers, engineering plastics, and films due to its easy-to-obtain raw materials, excellent mechanical properties, and chemical corrosion resistance. In particular, polyester produced from polyester is the most produced variety of synthetic fibers in my country. However, traditional polyester is a very flamm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/692C08G63/86C08K3/26C08K3/22C08K3/16
CPCC08G63/6926C08G63/866C08K3/16C08K3/22C08K3/26C08K2003/166C08K2003/2224
Inventor 雷自强和瑾楠曾巍杨志旺杨尧霞石剑平
Owner NORTHWEST NORMAL UNIVERSITY
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