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PA66 composition as well as preparation method and application thereof

A technology of PA66 and composition, which is applied in the field of polymer materials, can solve the problems of poor thermal stability, increased mold scale formation, increased production costs, etc., and achieves the effect of stable mass production and high heat resistance

Pending Publication Date: 2022-02-11
KINGFA SCI & TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the use of MCA flame-retardant nylon 66 material has a significant problem in injection molding production: due to the poor thermal stability of MCA, MCA is easy to decompose and precipitate during high-temperature processing, and the precipitates are deposited in the mold to form a large amount of mold scale , In addition, the compatibility between MCA and nylon 66 is also poor, and it is easy to precipitate and increase the formation of mold scale. This leads to the need to clean the mold frequently during the large-scale injection molding production process of the material, which greatly reduces production efficiency and increases production. cost
The above problems limit the stable mass production of MCA flame retardant nylon 66 products

Method used

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  • PA66 composition as well as preparation method and application thereof
  • PA66 composition as well as preparation method and application thereof
  • PA66 composition as well as preparation method and application thereof

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preparation example Construction

[0041] The preparation method of embodiment and comparative example:

[0042] According to the ratio, put each component into a high-speed mixer and mix until uniform, then add it into a twin-screw extruder, extrude and granulate to obtain a PA66 composition; wherein, the extrusion temperature is set at 160°C in the first zone, and 160°C in the second zone. Zone 260°C, Zone 3 260°C, Zone 4 265°C, Zone 5 275°C, Zone 6 280°C, Zone 7 280°C, Zone 8 280°C, Zone 9 280°C; the screw speed is 400 rpm.

[0043] Performance test method:

[0044] (1) Heat distortion temperature: test with reference to the standard GB / T 1634.2-2019;

[0045] (2) Mold scale evaluation method: use a square plate mold as the mold scale evaluation mold, you can see the mold scale through the exhaust port, continuously inject 200 molds, observe the mold scale, and score, the score range is 0-10 points: 0 Score basically no mold fouling, 10 points for very serious mold fouling, the higher the score, the more s...

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Abstract

The invention discloses a PA66 composition as well as a preparation method and application thereof. The PA66 composition comprises the components in parts by weight: 100 parts of PA66 resin, 4 to 12 parts of low-melting-point polyamide, 6 to 8 parts of melamine cyanurate, and 0.2 to 0.4 part of a flame retardant stabilizer. The PA66 composition prepared by adding a certain amount of low-melting-point polyamide into an MCA flame-retardant PA66 resin system has high heat resistance, generates less mold scale and even basically does not form mold scale in the injection molding process, and solves the problem that a mold needs to be cleaned frequently due to serious injection mold scale of an MCA flame-retardant PA66 material in the prior art; and the MCA flame-retardant PA66 material can be stably produced in large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a PA66 composition and its preparation method and application. Background technique [0002] Nylon 66 (PA66) has excellent comprehensive properties (good mechanical properties, heat resistance, wear resistance, chemical corrosion resistance, etc.), but its flame retardancy is poor. In practical applications, it is often necessary to modify nylon 66 to meet the requirements of use Require. At present, nylon 66, which is flame-retardant by MCA in the prior art, has excellent electrical and mechanical properties, and is also halogen-free and phosphorus-free. It is widely used in the electrical and electronic fields, especially connectors and circuit breakers. [0003] However, the use of MCA flame-retardant nylon 66 material has a significant problem in injection molding production: due to the poor thermal stability of MCA, MCA is easy to decompose and precipitate during ...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08K5/3492C08K5/092
CPCC08L77/06C08L2201/08C08L2201/02C08L2205/025C08K5/34928C08K5/092
Inventor 陈锐陈平绪叶南飚王丰郑一泉
Owner KINGFA SCI & TECH CO LTD
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