Neodymium iron boron-PPS plastic magnetic material with high fluidity and high magnetic properties, and preparation method thereof

A technology of NdFeB and plastic magnetism, which is applied in the field of NdFeB PPS plastic magnetic material with high fluidity and high magnetic properties and its preparation field, which can solve the problems of reduced fluidity, influence on magnetic properties, poor fluidity, etc., and achieve processing time Appropriateness, reduced oxidation problems, and improved fluidity

Active Publication Date: 2019-11-08
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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  • Neodymium iron boron-PPS plastic magnetic material with high fluidity and high magnetic properties, and preparation method thereof

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[0029] The present invention provides a method for preparing the neodymium-iron-boron PPS plastic-magnetic material described in the above technical solution, comprising the following steps:

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

[0031] mixing the first modified mixture with a lubricating dispersant, an antioxidant and EEA, and performing a second modification to obtain a second modified mixture;

[0032] The second modified mixture is kneaded with PPS and extruded to obtain NdFeB PPS plastic magnetic material.

[0033] The invention mixes NdFeB magnetic powder, solvent and silane coupling agent, performs first modification on NdFeB magnetic powder, and obtains first modified mixed material. In the present invention, the solvent is preferably absolute ethanol, and the liquid-solid ratio of the absolute ethanol to the NdFeB magnetic powder is preferably 25...

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 the 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 add 2 g of TAF lubricating and dispersing agent, 0.3 g of BASF Ciba 168 quality, add EEA (mass is M2), and mix at high speed for 1.5 minutes to obtain the second modified mixture.

[0048] (3) Material drying

[0049] Put t...

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Abstract

The invention provides a neodymium iron boron-PPS plastic magnetic material with high fluidity and high magnetic properties, and a preparation method thereof, belonging to the technical field of magnetic materials. The neodymium iron boron-PPS plastic magnetic material provided by the invention is prepared from the following raw materials by weight: 50-150 parts of PPS, 850-950 parts of neodymiumiron boron magnetic powder, 0.3 part of an antioxidant, 0.01-30 parts of EEA, 2 parts of a lubricating dispersant and 0-11 parts of a silane coupling agent. According to the invention, the surface lipophilic property of the neodymium iron boron magnetic powder can be improved by adding an appropriate amount of EEA, so the compatibility of the magnetic powder with the PPS and other polymers is enhanced, and the fluidity of the material is improved; thus, the content of the magnetic powder can be increased. The results of embodiments of the invention show that the content of the magnetic powdercan be increased to 95 wt. %.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to an NdFeB PPS plastic magnetic material with high fluidity and high magnetic properties 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(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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