Polyamide composite material and preparation method thereof

A composite material and polyamide technology, which is applied in the field of polyamide composite materials and its preparation, can solve the problems of decreased flame retardant effect of red phosphorus, increase of PA66 material strength, toughness and other adverse effects on mechanical properties, and facilitates large-scale production and application , the surface is smooth and tidy, and the effect of improving the flame retardant properties

Inactive Publication Date: 2019-09-06
GUANGZHOU HUAXINKE ENTERPRISE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flame retardant effect of the coated red phosphorus decreases, and it also increases the adverse effects on the mechanical properties of the PA66 material such as strength and toughness.

Method used

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  • Polyamide composite material and preparation method thereof
  • Polyamide composite material and preparation method thereof
  • Polyamide composite material and preparation method thereof

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Effect test

preparation example Construction

[0038] The preparation method of above-mentioned polyamide composite material, comprises the steps:

[0039] Mixing the various raw material components to prepare a mixture;

[0040] Put the mixed material into an extruder, melt extrude and granulate.

[0041] The preparation method has simple process, is easy to control, and is convenient for large-scale industrial application.

[0042] In some specific embodiments, the extruder is a twin-screw extruder, and the temperature of the first zone of the twin-screw extruder is controlled to be 220-260°C, the temperature of the second zone is 250-280°C, and the temperature of the third zone is 250~280℃, the temperature of the fourth zone is 240~270℃, the temperature of the machine head is 260~280℃, the residence time is 1~2min, and the pressure is 12~18MPa. The residence time refers to the total time that the mixed material stays in the screw extruder.

Embodiment 1

[0053] Present embodiment is a kind of polyamide composite material, and its preparation method is as follows:

[0054] Put 65 parts of PA66, 12 parts of albino red phosphorus masterbatch, 4 parts of sodium antimonate, 0.2 parts of montmorillonite, 0.3 parts of antioxidant, 0.3 parts of lubricant and 0.1 parts of coupling agent, put After fully mixing in the mixing tank for 15 minutes, put the mixed material into a twin-screw extruder to melt and knead, extrude, and granulate to obtain final product; the screw diameter of the twin-screw extruder is 50 mm, and the screw The ratio of length to diameter is set to 42, the extrusion temperature is 250°C in the first zone, 265°C in the second zone, 260°C in the third zone, 250°C in the fourth zone, 265°C in the die head, and the residence time is 1-2min , the pressure is 16MPa.

Embodiment 2

[0056] Present embodiment is a kind of polyamide composite material, and its preparation method is as follows:

[0057] Put 70 parts of PA66, 12 parts of albino red phosphorus masterbatch, 3 parts of sodium antimonate, 2 parts of montmorillonite, 0.3 parts of antioxidant, 0.5 parts of lubricant and 0.5 parts of coupling agent, put After fully mixing in the mixing tank for 15 minutes, put the mixed material into a twin-screw extruder to melt and knead, extrude, and granulate to obtain final product; the screw diameter of the twin-screw extruder is 50 mm, and the screw The ratio of length to diameter is set to 42, the extrusion temperature is 250°C in the first zone, 265°C in the second zone, 260°C in the third zone, 250°C in the fourth zone, 265°C in the die head, and the residence time is 1-2min , the pressure is 16MPa.

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Abstract

The invention relates to a polyamide composite material and a preparation method thereof. The polyamide composite material is prepared from, by weight, 60-95 parts of polyamide, 7-20 parts of whitenedred phosphorus, 2-4 parts of an antimony-based flame retardant, 0.1-5 parts of montmorillonite, 0.2-1 part of an antioxidant, 0.1-5 parts of a lubricant and 0.1-2 parts of a coupling agent. The polyamide composite material is suitable for light-colored parts, and has the characteristics of excellent flame retardancy, excellent mechanical properties and flameless droplets.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polyamide composite material and a preparation method thereof. Background technique [0002] Engineering plastic polyamide 66 (PA66) has the advantages of high strength, good temperature resistance, excellent electrical insulation performance, oil resistance and wear resistance, etc., and is widely used in electronic appliances, machinery, automobiles, chemical engineering and other fields. However, PA66 itself is a combustible material (oxygen index 24%). When it burns, it generates a large amount of heat and has a fast burning speed. It produces flaming droplets and is easy to conduct flames. Therefore, it is of great significance to develop halogen-free flame-retardant PA66 materials with high flame-retardant properties. [0003] At present, the nitrogen-based flame retardant melamine cyanurate (MCA) is mostly used for non-reinforced PA66 halogen-free flame retard...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08K13/06C08K9/10C08K3/02C08K3/24C08K3/34
CPCC08K3/02C08K3/24C08K3/346C08K9/10C08K13/06C08K2003/026C08L2201/02C08L2201/22C08L77/06
Inventor 蔡建伟李云岩钱玉英杨智韬许华
Owner GUANGZHOU HUAXINKE ENTERPRISE
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