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Immersing precipitation-resistant halogen-free flame-retardant polyamide composite material and preparation method thereof

A flame-retardant polyamide and composite material technology, applied in the field of polyamide composite materials, can solve the problems of increasing the molecular weight of flame retardants and reducing the precipitation rate of flame retardants, so as to improve toughness, reduce the generation of molten droplets, and resist precipitation after immersion in water easy effect

Active Publication Date: 2019-05-10
ZHEJIANG XINLI NEW MATERIAL CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

The polymeric MCA reduces the precipitation rate of the flame retardant to a certain extent due to the increase in the molecular weight of the flame retardant

Method used

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  • Immersing precipitation-resistant halogen-free flame-retardant polyamide composite material and preparation method thereof
  • Immersing precipitation-resistant halogen-free flame-retardant polyamide composite material and preparation method thereof
  • Immersing precipitation-resistant halogen-free flame-retardant polyamide composite material and preparation method thereof

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Embodiment 1～3 and comparative example 1～2

[0042] The preparation of silicon dioxide modified melamine cyanurate comprises:

[0043] (1) Dissolve 50g of cetyltrimethylammonium bromide in 2000mL of ether and 3000mL of ethanol, add 500g of melamine isocyanate and place in ultrasonic dispersion for 10min. Subsequently, 5000 g of ammonia solution with a pH of 9.5 was added, and mechanically stirred at room temperature 25° C. for 0.5 h to obtain a mixture.

[0044] (2) After adding 250g ethyl orthosilicate to the above mixture, stir for 4h, then slowly add 50g of γ-aminopropyltriethoxysilane and continue to stir for 4h, after filtering, washing with water and washing with ethanol, the white solid obtained is washed at 80 After drying at ℃ for 24 hours, silica-modified melamine cyanurate was obtained.

[0045] Silica Modified Melamine Cyanurate

[0046] The polyamide 66, polyamide 6, silica-modified melamine cyanurate, epoxy polysiloxane, antioxidant 1098, and lubricant TAF are fed from the main feeding port of the twin-sc...

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Abstract

The invention discloses an immersing precipitation-resistant halogen-free flame-retardant polyamide composite material and a preparation method thereof. The immersed and precipitation-resistant halogen-free flame-retardant polyamide composite material is prepared from, by weight part, 65-90 parts of polyamide, 8-25 parts of silicon dioxide modified melamine cyanurate, 0.5-5 parts of epoxy polysiloxane, 0.1-1 part of antioxidant and 0.1-1 part of lubricant through double-screw extrusion and pelletizing. The prepared immersing precipitation-resistant halogen-free flame-retardant polyamide composite material has the advantages of being high in flame-retardant efficiency, good in tenacity, resistant to immersing precipitation, easy to process and the like and can be widely applied to the electronic and electrical field.

Description

technical field [0001] The invention relates to the technical field of polyamide composite materials, in particular to a water-immersion, precipitation-resistant, halogen-free flame-retardant polyamide composite material and a preparation method thereof. Background technique [0002] As an engineering plastic, polyamide has the characteristics of high mechanical properties, impact properties, high heat resistance, good chemical resistance and easy molding, and is widely used in automobiles, electronic appliances and other fields. However, polyamide produces droplet phenomenon in the combustion process, and produces a large number of flaming droplets, which is easy to cause secondary combustion. Therefore, it is necessary to carry out flame retardant modification on polyamide during its use. [0003] At present, the flame retardant system of polyamide is mainly bromine antimony system, nitrogen system, phosphorus nitrogen system and inorganic mineral filling. Bromine-antimo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L77/02C08L83/04C08K13/06C08K9/02C08K5/3492
Inventor 倪金平陈培叶耀挺聂帅陈良光
Owner ZHEJIANG XINLI NEW MATERIAL CO LTD
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