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PPS-rare earth permanent-magnetic granular master batch used for injection molding and preparation method of same

A rare earth permanent magnet and rare earth magnetic powder technology, which is applied in the field of PPS-rare earth permanent magnet injection particle masterbatch and its preparation field, can solve the problem that it is difficult for the injection molding products of magnetic devices to meet the material requirements, improve the uniformity and stability, prevent the Magnetic powder oxidation, the effect of high fluidity

Inactive Publication Date: 2018-01-19
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of high-tech products such as auto parts, computers, and electronic devices, which are increasingly miniaturized, lightweight, complex in shape, and intelligent, the requirements for the performance, strength, and stability of injection-molded magnetic devices are getting higher and higher. Especially in the field of automotive motors, it is difficult for ordinary magnetic device injection molding products to meet the corresponding material requirements

Method used

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  • PPS-rare earth permanent-magnetic granular master batch used for injection molding and preparation method of same
  • PPS-rare earth permanent-magnetic granular master batch used for injection molding and preparation method of same

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A PPS-rare earth permanent magnet injection molding particle masterbatch, comprising the following raw materials in weight percentages:

[0031] 91 parts of rare earth magnetic powder, 6.1 parts of PPS powder, 1.5 parts of reinforcing agent, 0.5 parts of coupling agent, 0.5 parts of antioxidant, 0.4 parts of lubricant;

[0032] Among them, the rare earth magnetic powder is isotropic NdFeB magnetic powder, the reinforcing agent is glass fiber, the coupling agent is silane coupling agent, the antioxidant is phosphoric acid, and the lubricant is N,N'-ethylene bisstearamide.

[0033] The preparation method of PPS-rare earth permanent magnet injection molding particle masterbatch comprises the following steps:

[0034] a) Surface treatment of magnetic powder: Add antioxidant to rare earth magnetic powder and blend for 30 minutes at 100°C to obtain surface-treated magnetic powder; dissolve antioxidant in absolute ethanol before use, and the mass ratio of antioxidant to absolu...

Embodiment 2

[0041] A PPS-rare earth permanent magnet injection molding particle masterbatch, comprising the following raw materials in weight percentages:

[0042] 91 parts of rare earth magnetic powder, 6.1 parts of PPS powder, 1.5 parts of reinforcing agent, 0.5 parts of coupling agent, 0.5 parts of antioxidant, 0.4 parts of lubricant;

[0043] Among them, the rare earth magnetic powder is isotropic NdFeB magnetic powder, the reinforcing agent is carbon fiber, the coupling agent is silane ester coupling agent, the antioxidant is phosphoric acid, and the lubricant is N,N'-ethylene bisstearamide.

[0044] The preparation method of the PPS-rare earth permanent magnet injection molding particle masterbatch is the same as in Example 1.

Embodiment 3

[0046] A PPS-rare earth permanent magnet injection molding particle masterbatch, comprising the following raw materials in weight percentages:

[0047] 88 parts of rare earth magnetic powder, 7.2 parts of PPS powder, 2.4 parts of reinforcing agent, 0.5 part of coupling agent, 0.5 part of antioxidant, 0.4 part of lubricant;

[0048] Among them, the rare earth magnetic powder is isotropic NdFeB magnetic powder, the reinforcing agent is glass fiber, the coupling agent is silane ester coupling agent, the antioxidant is phosphoric acid, and the lubricant is N,N'-ethylene bisstearamide.

[0049] The preparation method of the PPS-rare earth permanent magnet injection molding particle masterbatch is the same as in Example 1.

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Abstract

The invention belongs to the technical field of magnetic materials and discloses a PPS-rare earth permanent-magnetic granular master batch used for injection molding. The master batch is prepared fromraw materials including: rare earth magnetic powder, PPS powder, a reinforcing agent, a coupling agent, an antioxidant, a lubricant and the like; the invention also discloses a preparation method ofthe PPS-rare earth permanent-magnetic granular master batch used for injection molding. In the invention, a rare earth permanent-magnetic material is used as a main component, and through surface modification process, oxidization of magnetic powder is prevented, thus ensuring magnetic performance of the master batch; meanwhile, a corresponding coupling agent is added, so that binding force betweenthe magnetic powder and the binder, polyphenylene sulfide (PPS), is enhanced, and the uniformity and stability of the master batch are enhanced; a certain amount of the reinforcing agent is added tomodify the PPS, thus increasing strength of the master batch; finally, the lubricant can improve the flowability of the master batch. The PPS-rare earth permanent-magnetic granular master batch used for injection molding has high performances, high stability, high flowability and the like advantages.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a PPS-rare earth permanent magnet injection molding particle masterbatch and a preparation method thereof. Background technique [0002] With the development of high-tech products such as auto parts, computers, and electronic devices, which are increasingly miniaturized, lightweight, complex in shape, and intelligent, the requirements for the performance, strength, and stability of injection-molded magnetic devices are getting higher and higher. Especially in the field of automotive motors, it is difficult for ordinary magnetic device injection molding products to meet the corresponding material requirements. [0003] Automotive motor components require magnets to have high heat resistance and dimensional stability, while the heat resistance and stability of injection-molded magnets mainly depend on the binder. Polyphenylene sulfide (PPS) is a kind of thermoplastic sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L81/02C08L91/06C08K13/06C08K9/02C08K9/04C08K9/06C08K3/38C08K3/28C08K7/14C08K5/20C08K7/06C08K7/24
Inventor 胡江平金志洪吴云飞杨新强
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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