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Phosphorus-containing network structure flame retardant

A network structure and flame retardant technology, which is applied in the field of network structure flame retardants containing phosphorus elements, can solve the problems that cannot meet the requirements of flame retardant materials, and achieve the effects of easy production, improved flame retardant efficiency, and easy charcoal formation

Active Publication Date: 2017-06-13
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, each flame retardant has its disadvantages and cannot meet the requirements of the growing new technology for flame retardant materials.

Method used

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  • Phosphorus-containing network structure flame retardant
  • Phosphorus-containing network structure flame retardant
  • Phosphorus-containing network structure flame retardant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take piperazine 2.58g (0.03mol) and dissolve it in 20ml CH at 30°C 2 Cl 2 , add acid-binding agent triethylamine 6.07g (0.06mol) simultaneously, stir in the there-necked flask with the rotating speed of 200r / min until uniform, system passes N 2 protection, and connected to the exhaust absorption device. Take 4.87g (0.025mol) of phenylphosphonic dichloride and dissolve it in 20ml of dichloromethane and place it in a constant pressure dropping funnel, drop it into the piperazine solution at a rate of 1-2 drops / s to react for 1 hour, and a white Precipitation occurs. Then take POCl 3 Dissolve 0.51g (0.0033mol) in 20ml of dichloromethane, put it in a constant pressure dropping funnel, drop the above solution, control the temperature at 40°C and continue the reaction for 1h, and finally add 0.11g (0.0005mol) of coupling agent KH550 to continue the reaction for 2h, Suction filtration and fully washed with ethanol to obtain a viscous substance. The product was dried in a ...

Embodiment 2

[0031] Change the first stage reaction time of embodiment 1 into 2h, all the other conditions are constant, can obtain product P2, infrared spectrum is as follows figure 1 As shown in the middle b curve, the thermogravimetric curve is as figure 2 Shown in the b curve.

Embodiment 3

[0033] Take piperazine 3.27g (0.038mol) and dissolve it in 25ml CH at 30°C 2 Cl 2 At the same time, add 10.34g (0.08mol) of acid-binding agent N,N-diisopropylethylamine, stir in the three-necked flask at a speed of 300r / min until uniform, and the system passes N 2 protection, and connected to the exhaust absorption device. Take 4.87g (0.024mol) of phenylphosphonic dichloride and dissolve it in 20ml of dichloromethane, place it in a constant pressure dropping funnel, add it dropwise to the piperazine solution at a rate of 1-2 drops / s, and react for 1 hour, a white precipitate appears produce. Then take POCl 3 1.42g (0.0093mol) was dissolved in 20ml of dichloromethane, placed in a constant pressure dropping funnel and dripped into the above solution, the temperature was controlled at 30°C to continue the reaction for 1h, and 0.09g (0.0004mol) of coupling agent KH550 was added to continue the reaction for 3h. Filter and fully wash with methanol to obtain a viscous substance, d...

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Abstract

The invention relates to a network structure flame retardant. A phosphorus-containing macromolecular network structure flame retardant is developed aiming at the defects that the existing small-molecule flame retardant is easy to volatilize and emigrate, polymer flame retardants are less in types and the application field is limited. The preparation method comprises the following steps: preparing linear prepolymers, namely changing reaction conditions so as to obtain the linear prepolymers of different polymerization degrees; adding trifunctional cross-linked components so as to obtain a macromolecular flame retardant of different network structures; and finally, obtaining the final product through functional group end capping. According to the product, the problems of volatilization and transfer of the small-molecule flame retardant is improved, and the thermal decomposition behavior of the flame retardant can be regulated by changing the structure and reaction degree, so that products suitable for different polymer matrixes can be obtained. The raw materials used in the invention are wide in source and low in price, the polymerization process is mild in conditions and easy to produce, and the flame retardant is controllable in structure and can be independently taken as an intumescent flame retardant or serve as a charring agent or can be compounded with other flame retardants.

Description

technical field [0001] The invention relates to a network structure flame retardant, in particular to a phosphorus element-containing network structure flame retardant. Background technique [0002] Due to their own structure, many polymer materials are flammable. When they are used in many fields such as construction, transportation, automobiles, toys, electrical appliances, etc., they will cause great harm due to exposure to heat sources such as light, electricity, and fire. security risks. Therefore, the flame retardancy of polymer materials is of great significance to its safe use, and it is also a globally accepted safety measure. At present, there are many varieties of commercial flame retardants, which are applied to different polymers. Among them, phosphorus-based flame retardants are currently the most mainstream halogen-free flame retardants, including various phosphates, phosphates, etc. With the improvement of environmental protection requirements in the world...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L85/02C08L101/00C08G79/04C08G79/02
CPCC08G79/02C08G79/04C08L85/02C08L101/00C08L2201/02
Inventor 李娟马东
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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