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Heat-resistant injection-molded ferrite master batch and preparation method thereof

A ferrite and high-temperature-resistant technology, which is applied in the field of high-temperature-resistant injection ferrite masterbatch and its preparation, can solve the problems of unreachable, magnetic properties and fluidity of pellets that cannot meet the production needs of high-performance products, low performance, etc. problems, to achieve good magnetic properties, easy production, and simple preparation methods

Inactive Publication Date: 2017-12-01
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic injection molding products are mainly nylon 6 and nylon 12 series, but with the continuous advancement of high-end markets such as the automotive field, injection molding ferrite products have higher and higher requirements for high temperature resistance, high stability, and high strength, while nylon 6. Nylon 12 series injection molded ferrite products obviously fail to meet the market demand, and their performance is relatively low. Their strength, magnetic properties and particle fluidity cannot meet the production needs of high-performance products.

Method used

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  • Heat-resistant injection-molded ferrite master batch and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0031] A high temperature resistant injection molded ferrite masterbatch, which is mainly made of the following raw materials in weight percentage:

[0032] Rare earth magnetic powder 70wt%, polyphenylene sulfide 23.8wt%, polyparaphenylene terephthalamide 2.0wt%, titanate coupling agent 2.0wt%, sodium pyrophosphate 2.0wt%, phospholipid 0.1wt%, paraffin 0.1 wt%.

[0033] A preparation method of high temperature resistant injection molded ferrite masterbatch, comprising the following steps:

[0034] Add dispersant to the magnetic powder and mix evenly, then add surface treatment additives to it for surface treatment, then add polyphenylene sulfide mixed with polyparaphenylene terephthalamide, antioxidant and lubricant and mix evenly, Finally, use a twin-screw granulator to extrude and granulate; wherein the mixing temperature is 80°C, and the granulation temperature is 280°C; the surface treatment additive is mixed with ethanol or isopropanol before adding, and the content of e...

Embodiment 2

[0036] A high temperature resistant injection molded ferrite masterbatch, which is mainly made of the following raw materials in weight percentage:

[0037] Strontium ferrite magnetic powder 85.68wt%, polyphenylene sulfide 13.1wt%, polyparaphenylene terephthalamide 0.05wt%, phosphate coupling agent 0.86wt%, sodium metapolyphosphate 0.17wt%, 4- Hexyl resorcinol 0.07wt%, stearic acid 0.07wt%.

[0038] A preparation method of high temperature resistant injection molded ferrite masterbatch, comprising the following steps:

[0039] Add dispersant to the magnetic powder and mix evenly, then add surface treatment additives to it for surface treatment, then add polyphenylene sulfide mixed with polyparaphenylene terephthalamide, antioxidant and lubricant and mix evenly, Finally, use a twin-screw granulator to extrude and granulate; wherein the mixing temperature is 100°C, and the granulation temperature is 290°C; the surface treatment additive is mixed with ethanol or isopropanol befo...

Embodiment 3

[0041] A high temperature resistant injection molded ferrite masterbatch, which is mainly made of the following raw materials in weight percentage:

[0042] Strontium ferrite magnetic powder 85.8wt%, polyphenylene sulfide 12.95wt%, polyparaphenylene terephthalamide 0.08wt%, silane coupling agent 0.85wt%, sodium metapolyphosphate 0.17wt%, 4-hexyl Resorcinol 0.08wt%, stearic acid 0.07wt%.

[0043] A preparation method of high temperature resistant injection molded ferrite masterbatch, comprising the following steps:

[0044] Add dispersant to the magnetic powder and mix evenly, then add surface treatment additives to it for surface treatment, then add polyphenylene sulfide mixed with polyparaphenylene terephthalamide, antioxidant and lubricant and mix evenly, Finally, use a twin-screw granulator to extrude and granulate; wherein the mixing temperature is 100°C, and the granulation temperature is 300°C; the surface treatment additive is mixed with ethanol or isopropanol before a...

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Abstract

The invention relates to the technical field of permanent magnet and discloses a heat-resistant injection-molded ferrite master batch. The heat-resistant injection-molded ferrite master batch is prepared from magnetic powder, polyphenylene sulfide, poly-p-phenylene phthalamide, surface treatment additives, dispersing agent, antioxidant, lubricant and the like. The invention also discloses a preparation method of the heat-resistant injection-molded ferrite master batch. The heat-resistant injection-molded ferrite master batch is more uniform in distribution of the magnetic powder, higher in filling volume of the magnetic powder and better in magnetic performance; due to the fact that the polyphenylene sulfide is lower in viscosity, the heat-resistant injection-molded ferrite master batch is better in mobility. The prepared heat-resistant injection-molded ferrite master batch is higher in magnetic performance, stability and mobility. The preparation method of the heat-resistant injection-molded ferrite master batch is simple and easy to manufacture.

Description

technical field [0001] The invention relates to the technical field of permanent magnets, in particular to a high temperature resistant injection molded ferrite masterbatch and a preparation method thereof. Background technique [0002] With the progress of microelectronics technology, all kinds of electronic products on the market are striving to develop in the direction of small size and portable. Micro motors are widely used in various electronic products to meet market demand. At present, the materials for the production of micro motors on the market are mainly ferrite magnetic powder. The traditional method of producing ferrite magnets is through sintering and molding to produce products of various shapes. However, the sintered magnet will be deformed during the sintering process, the yield is low, the dimensional accuracy is not easy to control, the impact strength is low, and the multi-pole magnetization is difficult. More importantly, as a motor rotor, the shaft and...

Claims

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Application Information

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IPC IPC(8): C08L81/02C08L77/10C08L91/06C08K13/02C08K3/22C08K5/10C08K3/32C08K5/521C08K5/13C08K5/09C08K5/54C08J3/22
CPCC08L81/02C08J3/226C08J2381/02C08J2477/10C08K2201/01C08L2205/03C08L77/10C08L91/06C08K13/02C08K3/22C08K5/10C08K3/32C08K5/521C08K5/13C08K5/09C08K5/54
Inventor 胡江平金志洪吴云飞
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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