High-performance magnetic rubber and its preparation method

A magnetic rubber and high-performance technology, which is applied in the field of high-performance magnetic rubber and its preparation, can solve problems such as broken gears, product thickness and flexibility limitations, and difficulty in meeting the needs of high-precision products, and achieve good flexibility.

Inactive Publication Date: 2003-07-16
BGRIMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing magnetic materials cannot meet the needs of high-end, precise and sharp products.
At present, the magnetic energy product of flexible NdFeB permanent magnet materials is 40-80kJ / m 3 , the magnetic energy product of the ferrite flexible magnet is only 15kJ / m 3 Left and right, the magnetic properties between the two types of permanent magnet materials appear to be "disconnected"; and although the magnetic properties of sintered ferrite are within this range, because of its rigidity, the thickness and flexibility of its products are limited, and it is difficult to Meet the needs of high-precision products within this magnetic performance range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 30 grams of nitrile rubber, 70 grams of chloroprene rubber, 12 grams of coupling agent, 6 grams of processing aids, 2500 grams of composite powder of strontium ferrite and NdFeB alloy, of which 500 grams of strontium ferrite. Strontium ferrite permanent magnetic powder and NdFeB alloy permanent magnetic powder are made into composite powder with a particle diameter of 0.074 mm, 25 grams of epoxy resin is dissolved in 1000 grams of acetone solution, and then mixed with the composite powder evenly. Then put the chloroprene rubber and nitrile rubber into an open mill for mixing at a temperature of 45°C. After 10 minutes, add processing aids. After the mixing is uniform, add the modified polybutadiene and composite powder alternately, and then mix them. Roll down after 15 minutes of mixing. It is also possible to put the above-mentioned materials into an internal mixer for mixing. The mixing temperature is 50°C and the pressure of the top plug is 5Mpa. Then the mixed material i...

example 1

[0023] The mechanical properties of the modified polybutadiene not used in Example 1 are as follows: Tensile Strength is 2.30-2.50Mpa, Elongation is 20.00%-25.00%, and Hardness is 22.00-23.00 SHD.

Embodiment 2

[0025]80 grams of nitrile rubber, 20 grams of natural rubber, 12 grams of coupling agent, 7 grams of processing aids, 2500 grams of composite powder of strontium ferrite and NdFeB alloy, of which 500 grams of strontium ferrite. Strontium ferrite permanent magnetic powder and NdFeB alloy permanent magnetic powder are made into composite powder with a particle diameter of 0.060 mm, 25 grams of epoxy resin is dissolved in 1000 grams of acetone solution, and then mixed with the composite powder evenly. Then put the nitrile rubber and natural rubber into an open mill for mixing at a temperature of 50°C, and add processing aids after 15 minutes. After the mixing is uniform, add the modified polybutadiene and composite powder alternately, and then mix Roll down after 15min. It is also possible to put the above-mentioned materials into an internal mixer for mixing. The mixing temperature is 55°C and the pressure of the top plug is 5Mpa. Then the mixed material is calendered, and the thick...

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PUM

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Abstract

A high-property magnetic rubber is prepared from composite permanent-magnet powder (90-97 mass%), rubber (2-9.8), assistant (0.1-0.5) and coupling agent (0.1-0.5) through pulverizing, coating, pugging, calendering and heat treating. Said composite permanent-magnet powder is composed of ferrite-type permanent-magnet, alloy-temp one, and epoxy resin. Its advantages are high magnetic property, better flexibility and high elongate percentage (40-150%).

Description

Technical field [0001] A high-performance magnetic rubber and a preparation method thereof relate to a high-performance magnetic rubber material applied to electronic products and rotary devices and a preparation method thereof. Background technique [0002] With the rapid development of the global information industry, my country's IT industry will rise rapidly in the next ten years. The computer industry, the automotive industry and the consumer electronics market will show a violent increase in the demand for high-performance magnetic materials. However, the existing magnetic materials cannot meet the needs of high, precise and sharp products. At present, the magnetic energy product of flexible NdFeB permanent magnet materials is 40~80kJ / m 3 , The magnetic energy product of ferrite flexible magnet is only 15kJ / m 3 The magnetic performance between the two types of permanent magnetic materials has appeared "disruption"; and although the magnetic performance of sintered ferrite i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/22C08L7/00C08L9/02C08L11/00C08L23/28
Inventor 任先京柴立民陶振声王峰李亚峰
Owner BGRIMM TECH CO LTD
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