A kind of NdFeB pps plastic magnetic material with high fluidity and high magnetic performance and preparation method thereof

A neodymium-iron-boron and plastic-magnet technology is applied in the field of high-fluidity and high-magnetic performance Nd-Fe-B PPS plastic-magnetic material and its preparation field, which can solve the problem that the Nd-Fe-B magnetic powder is difficult to reach 93.5wt.%, cannot be processed smoothly, and affects the Magnetic properties and other issues, to improve the lipophilic properties of the surface, reduce oxidation problems, and increase the content of magnetic powder

Active Publication Date: 2021-10-08
BGRIMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the fluidity of the existing NdFeB PPS plastic magnetic materials is poor. With the increase of the magnetic powder content, the fluidity will be further reduced, resulting in the inability to process smoothly. Therefore, the NdFeB magnetic powder in the existing NdFeB PPS plastic magnetic materials The content is generally difficult to reach 93.5wt.%, which affects the further improvement of magnetic properties

Method used

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  • A kind of NdFeB pps plastic magnetic material with high fluidity and high magnetic performance and preparation method thereof

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preparation example Construction

[0029] The present invention provides the preparation method of neodymium-iron-boron PPS plastic magnetic material described in above-mentioned technical scheme, comprises the following steps:

[0030] mixing the NdFeB magnetic powder, a solvent and a silane coupling agent, and first modifying the NdFeB magnetic powder to obtain a first modified mixture;

[0031] The first modified mixture is mixed with lubricating dispersant, antioxidant and EEA, and the second modification is carried out to obtain the second modified mixture;

[0032] The second modified compound is mixed with PPS, and extruded to obtain NdFeB PPS plastic magnetic material.

[0033] The invention mixes the NdFeB magnetic powder, solvent and silane coupling agent to carry out the first modification on the NdFeB magnetic powder to obtain the first modified mixture. In the present invention, the solvent is preferably dehydrated alcohol, and the liquid-solid ratio of the dehydrated alcohol to the NdFeB magnetic...

Embodiment 1～7

[0043] (1) Magnetic powder and PPS pretreatment

[0044] Use NdFeB magnetic powder with the brand name MQP-A-10179, put it into a PH-050A constant temperature drying oven and dry it at 120°C for 30min;

[0045] Use PPS resin with the brand name of 0220A9 and place it in a PH-050A constant temperature drying oven, dry at 120°C for 3 hours, and dry at 60°C for 12 hours;

[0046] (2) Mixing process

[0047] According to the formula in Table 1, set the filling amount of NdFeB magnetic powder, the mass is M1, add 25mL of absolute ethanol, add the coupling agent SG-Si900 with the mass of M3, use XJD-300B high-speed mixer to mix at high speed for 1.5min, and obtain the first modification After the material is discharged, the tank is thoroughly cleaned; then 2 g of TAF lubricating and dispersing agent, 0.3 g of BASF Ciba 168, and EEA (mass of M2) are added, and mixed at high speed for 1.5 minutes to obtain the second modified mixture.

[0048] (3) Material drying

[0049] Put the a...

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Abstract

The invention provides a neodymium-iron-boron PPS plastic magnetic material with high fluidity and high magnetic performance and a preparation method thereof, belonging to the technical field of magnetic materials. The NdFeB PPS plastic magnetic material provided by the present invention comprises the following preparation raw materials in parts by weight: 50 to 150 parts of PPS, 850 to 950 parts of NdFeB magnetic powder, 0.3 parts of antioxidant, 0.01 to 30 parts of EEA, and 2 parts of lubricating and dispersing agent parts, 0 to 11 parts of silane coupling agent. By adding an appropriate amount of EEA, the present invention can improve the lipophilicity of the surface of the NdFeB magnetic powder, enhance the compatibility of the magnetic powder with PPS and other macromolecules, and enhance the fluidity of the material, so the content of the magnetic powder can be increased. The results of the examples show that the content of the magnetic powder of the present invention can be increased to 95wt.%.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a high-fluidity high-magnetic NdFeB PPS plastic magnetic material and a preparation method thereof. Background technique [0002] NdFeB PPS (polyphenylene sulfide) plastic magnetic material has better heat resistance, moisture resistance and corrosion resistance than NdFeB PA6 or NdFeB PA12 plastic magnetic material, and is widely used in computer hard drives, mobile phones, frequency conversion appliances, Electric actuators and other fields. [0003] However, the fluidity of the existing NdFeB PPS plastic magnetic materials is poor. With the increase of the magnetic powder content, the fluidity will be further reduced, resulting in the inability to process smoothly. Therefore, the NdFeB magnetic powder in the existing NdFeB PPS plastic magnetic materials The content is generally difficult to reach 93.5wt.%, which affects the further improvement of magnetic propertie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L81/02C08L23/08C08K9/06C08K3/38
CPCC08K2201/01C08L81/02C08L23/0869C08K9/06C08K3/38
Inventor 刘荣明耿赵文熊君张康胡国辉贾立颖黄可淼李志宏王倩李炳山
Owner BGRIMM TECH CO LTD
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