Heat-dissipation magnetic plastic and preparation method thereof

A heat dissipation and magnetic technology, applied in the direction of coating, etc., can solve the problems of affecting the mechanical properties of magnetic plastics, weak interfacial bonding, and affecting the strength of products, so as to improve processing flow performance, increase mold filling rate, and excellent mechanical properties. Effect

Inactive Publication Date: 2018-10-12
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the compatibility between the magnetic filling powder and the resin matrix is ​​poor, resulting in weak interfacial bonding between the two, which affects the mechanical properties of magnetic plastics; the magnetic property is poorer than that of rare earth magnetic plastics, and if a large amount of magnetic powder is filled, it will affect the strength of the product

Method used

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  • Heat-dissipation magnetic plastic and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0038] Adopt the following method to prepare the heat dissipation magnetic plastic of the present invention:

[0039] a. Preparation of magnetic liquid: mix ferric chloride and ferric chloride in a molar ratio of 1:0.9, dissolve in water, then add polyethylene glycol, and under nitrogen protection, add concentrated ammonia water dropwise until the pH is 8.5, Stir and react in a water bath at 50°C for 60 minutes, the stirring speed is 1000rpm, then cool down to room temperature, and separate the solid and liquid. The solid is nano-ferrite magnetic particles coated with polyethylene glycol, which is dispersed in the oily base liquid to obtain a magnetic liquid. The addition of polyethylene glycol is 10% of ferric chloride weight; The oily base liquid is liquid epoxy resin; The ratio is 1g: 1mL;

[0040] b. Preparation of material A: Add nylon, antistatic agent conductive carbon black and stearate stabilizer to the magnetic liquid, stir at 1000rpm for 40min, and obtain material ...

Embodiment 2

[0044] Adopt the following method to prepare the heat dissipation magnetic plastic of the present invention:

[0045] a. Preparation of magnetic liquid: mix ferric chloride and ferric chloride in a molar ratio of 1:1.1, dissolve in water, then add polyethylene glycol, and under nitrogen protection, add concentrated ammonia water dropwise until the pH is 9.5, Stir and react in a water bath at 70°C for 30 minutes, the stirring speed is 1500rpm, then cool down to room temperature, and separate the solid and liquid. The solid is nano-ferrite magnetic particles coated with polyethylene glycol, which are dispersed in the oily base liquid to obtain a magnetic liquid. The addition of Polyethylene Glycol is 30% of ferric chloride weight; Described oily base liquid is liquid silicone resin; The ratio is 1g: 4mL;

[0046] b. Preparation of material A: Add nylon, antistatic agent conductive carbon black and stearate stabilizer to the magnetic liquid, stir at 1500rpm for 20min, and obtain...

Embodiment 3

[0050] Adopt the following method to prepare the heat dissipation magnetic plastic of the present invention:

[0051] a. Preparation of magnetic liquid: mix ferric chloride and ferric chloride in a molar ratio of 1:1, dissolve in water, then add polyethylene glycol, and under nitrogen protection, add concentrated ammonia water dropwise until the pH is 9, Stir and react in a water bath at 60°C for 40 minutes, with a stirring speed of 1200rpm, then cool down to room temperature, and separate the solid and liquid. The solid is nano-ferrite magnetic particles coated with polyethylene glycol, which are dispersed in the oily base liquid to obtain a magnetic liquid. The addition of polyethylene glycol is 15% of ferric chloride weight; The oily base liquid is liquid epoxy resin; The ratio is 1g: 2mL;

[0052] b. Preparation of material A: Add nylon, antistatic agent conductive carbon black and stearate stabilizer to the magnetic liquid, stir at 1200rpm for 30min, and obtain material ...

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Abstract

The invention relates to heat-dissipation magnetic plastic and a preparation method thereof and belongs to the technical field of magnetic plastic. In order to solve the technical problems, the heat-dissipation magnetic plastic and the preparation method thereof are provided. Nano-ferrite magnetic particles coated with PEG (polyethylene glycol) are prepared with a coprecipitation method, so that aferrite magnetic liquid is obtained. Ferrite fine magnetic powder directly added in a conventional process is replaced with the ferrite magnetic liquid, a magnetic-field orientation field is added during mold filling of a melt, the melt is driven to flow by flowing of the magnetic liquid, so that processing flowing property is improved, the mold filling rate is increased, further, injection molding can be performed under the action of low-strength magnetic field, and energy consumption is reduced. A magnetic material provided with a heat conducting layer on the surface is obtained by sandwichinjection, the preparation method of the plastic is simple and fast, and the prepared magnetic material is good in heat dispersion performance.

Description

technical field [0001] The invention relates to a heat-dissipating magnetic plastic and a preparation method thereof, belonging to the technical field of magnetic plastics. Background technique [0002] Magnetic plastic is a kind of polymer magnetic material. Polymer magnetic material is a functional polymer material that can record sound, light, electricity and other information and can re-release it. It is one of the important basic materials of modern science and technology. Magnetic plastic mainly refers to plastic products with magnetism, which have the characteristics of low density and high impact resistance. Its products can be processed by cutting, cutting, drilling, welding, lamination and embossing, and are widely used in electronics, Electrical, instrumentation, communication, culture and education, medical and health and many fields in daily life. At the same time, it can be processed into products with high dimensional accuracy, thin walls and complex shapes,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00C08L63/00C08L83/04C08K9/10C08K3/22C08K3/04B29C45/00
CPCC08L77/00B29C45/0001C08K3/04C08K2003/2275C08K2201/001C08K2201/01C08K2201/011C08K2201/017C08L63/00C08K9/10C08K3/22C08L83/04
Inventor 陈庆昝航
Owner CHENDU NEW KELI CHEM SCI CO LTD
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