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Phosphorus-nitrogen flame retardant, preparation method thereof and polypropylene composite material containing the phosphorus-nitrogen flame retardant

A phosphorus-nitrogen flame retardant and composite material technology, which is applied in the field of polypropylene composite materials, can solve problems such as increased environmental pollution, decreased material properties, and increased costs, achieving high reaction efficiency, improved flame retardant performance, and simple preparation methods Effect

Active Publication Date: 2020-07-31
NINGBO BULL PRECISION MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this improvement process often leads to other problems, such as increased costs, increased environmental pollution, and decreased physical properties of materials, etc.

Method used

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  • Phosphorus-nitrogen flame retardant, preparation method thereof and polypropylene composite material containing the phosphorus-nitrogen flame retardant
  • Phosphorus-nitrogen flame retardant, preparation method thereof and polypropylene composite material containing the phosphorus-nitrogen flame retardant
  • Phosphorus-nitrogen flame retardant, preparation method thereof and polypropylene composite material containing the phosphorus-nitrogen flame retardant

Examples

Experimental program
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Effect test

Embodiment 1

[0042] The phosphorus-nitrogen flame retardant of the present embodiment is prepared by the following steps:

[0043] S1. Dissolve 0.04mol vanillin in chloroform to obtain a reaction solution, add it to a three-necked flask, then feed nitrogen and heat up, turn on the magnetic stirrer and stir at 300r / min;

[0044] S2. Dissolve 0.02mol phenylphosphoryl dichloride in chloroform, slowly add it dropwise to the above reaction solution, heat up to 60°C and continue to react for 4 hours;

[0045] S3. 0.06mol triethylamine was dissolved in chloroform, slowly added dropwise to the above reaction solution, and the temperature was raised to 70° C. for 3 hours;

[0046] S4. Dissolve 0.02mol of p-phenylenediamine in chloroform, slowly add it dropwise to the above reaction solution, continue to react for 4 hours, cool to room temperature, wash, dry and grind to obtain a powdery phosphorus nitrogen flame retardant.

[0047] The infrared spectrogram of the phosphorus-nitrogen flame retardan...

Embodiment 2

[0049] The phosphorus-nitrogen flame retardant of the present embodiment is prepared by the following steps:

[0050] S1. Dissolve 0.045mol vanillin in dichloromethane to obtain a reaction solution, add it to a three-necked flask, then feed nitrogen and heat up, turn on the magnetic stirrer and stir at 400r / min;

[0051] S2. Dissolve 0.02mol phenylphosphoryl dichloride in methylene chloride, slowly add it dropwise to the above reaction solution, heat up to 65°C and continue to react for 3.5 hours;

[0052] S3. Dissolve 0.07mol triethylamine in dichloromethane, slowly add it dropwise to the above reaction solution, raise the temperature to 75°C and react for 2.5 hours;

[0053] S4. Dissolve 0.025mol p-phenylenediamine in dichloromethane, slowly add it dropwise into the above reaction solution, continue to react for 4.5 hours, cool to room temperature, wash, dry and grind to obtain powdered phosphorus nitrogen flame retardant.

Embodiment 3

[0055] The polypropylene composite material of the present embodiment comprises following composition:

[0056] Copolymerized polypropylene: 93.5 parts

[0057] The phosphorus-nitrogen flame retardant prepared in embodiment 1: 5 parts

[0058] Decabromodiphenyl ether: 1 part

[0059] Bruggemann H161 antioxidant: 0.3 parts

[0060] Zhonglan Chenguang DS101HC silicone powder: 0.2 parts.

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Abstract

The invention provides a phosphorus-nitrogen flame retardant. The phosphorus-nitrogen flame retardant has a structure as shown in a formula (1) shown in the specification, wherein n is an integer from1 to 1000. The invention also provides a preparation method of the phosphorus-nitrogen flame retardant, which comprises the following steps: in an inert atmosphere, adding phenyl phosphoryl dichloride into vanillic aldehyde, reacting for 2-5 hours, adding triethylamine, continuing reacting for 2-4 hours, adding p-phenylenediamine, reacting for 3-6 hours, washing the obtained reaction solution, and drying to obtain the phosphorus-nitrogen flame retardant. The novel phosphorus-nitrogen flame retardant and a brominated flame retardant provided by the invention have an excellent synergistic effect, and are compounded to be used as the flame retardant of polypropylene, so that the polypropylene composite material can reach the flame retardant V0 level only by a small amount, the needle flame performance of the polypropylene material can be effectively improved, and molten drops do not drop when the polypropylene composite material is combusted.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a phosphorus-nitrogen flame retardant, a preparation method thereof, and a polypropylene composite material containing the phosphorus-nitrogen flame retardant. Background technique [0002] Polypropylene is widely used in the field of electronic appliances because of its low density, good chemical resistance, low price, and excellent comprehensive performance. It is one of the preferred plastic varieties in the home appliance industry, and its consumption accounts for about 30%. However, due to the structural limitation of polypropylene, its oxygen index is only 17.4-18.5, which is easy to burn. In the combustion process, polypropylene has a fast burning speed, a large heat release, and is accompanied by a droplet phenomenon, which is easy to cause a fire. Especially in the electrical industry, some polypropylenes are used as current-carrying parts and are in contact wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G79/04C08L23/14C08L85/02C08K5/06C08L23/12C08K5/136
CPCC08G79/04C08L23/14C08L23/12C08L2201/02C08L85/02C08K5/06C08K5/136
Inventor 李斯良颜端学邵景昌许凌峰
Owner NINGBO BULL PRECISION MFG CO LTD
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