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High-flame-retardancy nylon composite material resistant to high temperature and preparing method thereof

A nylon composite material and high flame retardant technology, which is applied in the field of flame retardant and high temperature resistant nylon synthesis, can solve the problems of high price of carbon nanotubes and ionic liquids, high cost of synergistic flame retardants, deterioration of material properties, etc., and is conducive to industrialization promotion. Implementation, preparation method is simple and efficient, and the effect of good mechanical properties

Active Publication Date: 2017-03-29
GUANGDONG JUHANG INST FOR ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the first two patents mentioned above, due to the high price of carbon nanotubes and ionic liquids, the cost of grafting hexachlorocyclotriphosphazene to prepare synergistic flame retardants is high, which has great limitations in practical applications and is not suitable for industrial application
In addition, when hexachlorocyclotriphosphazene or its derivatives are directly added as a flame retardant, the material will have the phenomenon of migration of small molecule flame retardants, resulting in material performance degradation and affecting the use effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1. In this example, under the action of ultrasonic waves, 2.0 g of expanded graphite is uniformly dispersed in 200 ml of mixed acid of perchloric acid and concentrated nitric acid (the Hammett acidity function HO value is less than -10), and then the temperature is raised to Continue ultrasonication at 60°C for 2~3h, and obtain carboxylated expanded graphite after vacuum filtration, multiple washings with a large amount of deionized water and methanol, and vacuum drying.

[0026] Weigh 1.1g of carboxylated expanded graphite and disperse it in 100ml of dry dimethyl sulfoxide solution, add 0.2g of sodium hydride and reflux at 50°C for 1h, then slowly add 50ml of hexachlorocyclotriphosphazene dissolved in 2g After the dropwise addition, the temperature was raised to 80°C to continue the reaction for 12 hours, filtered under reduced pressure, washed with a large amount of deionized water and acetone for many times, and vacuum dried to obtain hexachlorocyclotriphospha...

Embodiment 2

[0029] Example 2, the difference between this example and Example 1 is that the prepared hexachlorocyclotriphosphazene graft modified expanded graphite 25%, PA6T 50%, PA66 20%, stabilizer 1.5%, antioxidant 0.5 %, 1.5% lubricant, 1.5% coupling agent, mixed evenly with a high-speed mixer, and granulated by a twin-screw extruder to obtain a high-flame-resistance high-temperature nylon composite material.

[0030] After testing, the composite material has an oxygen index of 31 and a tensile strength of 92Mpa.

Embodiment 3

[0031] Example 3. In this example, under the action of ultrasonic waves, take 5.0 g of expanded graphite and evenly disperse it in 400 ml of a mixed acid of concentrated sulfuric acid and concentrated nitric acid (the HO value of the Hammett acidity function is less than -9), and then raise the temperature to 60 Continuous ultrasonication at ℃ for 3~4h, after vacuum filtration, multiple washings with a large amount of deionized water and ethanol, and vacuum drying, carboxylated expanded graphite was obtained.

[0032] Weigh 3g of carboxylated expanded graphite and disperse it in 200ml of dry N,N-dimethylformamide solution, add 0.5g of sodium hydride and reflux at 50°C for 1.5h, then slowly add dropwise 150ml of 5g hexachloro The N,N-dimethylformamide solution of cyclotriphosphazene, after the dropwise addition, the temperature was raised to 80°C to continue the reaction for 18 hours, and the cyclotriphosphazene was filtered under reduced pressure, washed with a large amount of ...

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Abstract

The invention discloses a high-flame-retardancy nylon composite material resistant to high temperature and a preparing method thereof. The composite material comprises, by weight, 50-85% of polyamide, 6-45% of flame retardant, 0.1-2% of stabilizer and 0.1-12% of other auxiliaries, wherein the flame retardant is hexachloro cyclotriphosphazene graft modified expanded graphite. Nitrogen, phosphorus, chlorine and organic carbon are combined, the synergistic flame retardant capacity can be remarkably improved, the phosphonitrile flame retardant is fixed to the surface of expanded graphite through chemical bonds, dispersity and compatibility of the expanded graphite in a resin matrix are improved, and the problem that small molecular flame retardant in the using process migrates outwards easily is solved.

Description

technical field [0001] The invention relates to the technical field of flame retardant and high temperature resistant nylon synthesis, in particular to a high flame retardant high temperature resistant nylon composite material and a preparation method thereof. Background technique [0002] High temperature resistant nylon has excellent performance and is widely used in the electrical and electronic industry, electronics industry and automobile industry. Although high-temperature-resistant nylon has excellent heat resistance, there is a big gap between its flame retardancy and actual use requirements, which greatly limits its application in many fields. Therefore, it is urgent and necessary to improve the flame retardancy of high temperature resistant nylon. [0003] Hexachlorocyclotriphosphazene is widely used as a fire retardant and self-extinguishing material because of its high content of nitrogen, phosphorus, chlorine and good reactivity. However, studies have found th...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08K13/06C08K9/04C08K9/02C08K7/24C08K5/5399
CPCC08K5/5399C08K7/24C08K9/02C08K9/04C08K13/06C08L77/06C08L2201/02C08L2201/08C08L2205/025
Inventor 唐孝芬魏珊珊陈旭东李素英吴浪许宏武杜惠娟
Owner GUANGDONG JUHANG INST FOR ADVANCED MATERIALS CO LTD
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