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Magnetic plastic and preparation method thereof

A magnetic and plastic technology, applied in the field of plastics, can solve the problems of unstable performance of magnetic plastics, poor combination of magnetic powder and plastic body, non-uniform magnetic plastics, etc., and achieve the goal of improving combination compatibility, ensuring uniformity and stability Effect

Inactive Publication Date: 2017-11-03
TAISHAN CHANGJIANG PLASTIC PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, most of the existing magnetic plastics directly add magnetic powder to the plastic to form a composite magnetic plastic. However, the combination of the magnetic powder and the plastic body is poor, resulting in unstable performance of the magnetic plastic; or the powder is easy to agglomerate in the plastic body. Poor dispersibility, making the magnetic plastic inhomogeneous

Method used

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preparation example Construction

[0025] The invention also discloses a preparation method of magnetic plastics, comprising the following steps:

[0026] S1: preparation of hyperbranched polysiloxane-grafted silica-coated ferric oxide particles;

[0027] S2: After mixing polyphenylene ether, silicone resin, lubricant, plasticizer and stabilizer evenly, heat, melt and stir in a high-speed mixer to obtain a polymerization mixture;

[0028] S3: Add the ferric oxide particles coated with hyperbranched polysiloxane grafted with silicon dioxide prepared in step S1 to the polymerization mixture prepared in step S2, and stir to make the ferric oxide particles coated on the surface of the ferric oxide particles The hyperbranched polysiloxane is evenly dispersed in the polymerization mixture; then it is placed in a mold, and after vacuum defoaming, it is solidified by a stepwise heating method, and then cooled to room temperature to obtain a magnetic plastic.

[0029] Wherein, in step S1, the following steps are includ...

Embodiment 1

[0037] This embodiment discloses a magnetic plastic, which includes the following components in parts by weight: 60 parts of polyphenylene ether, 15 parts of polyalkyl silicone resin, 3 parts of pentaerythritol stearate, phthalates 8 parts of plasticizer, 1 part of calcium stearate and 5 parts of magnetic particles, the magnetic particles are ferric oxide particles coated with silicon dioxide grafted by hyperbranched polysiloxane.

[0038] The preparation method of the magnetic plastic comprises the following steps:

[0039] S1: Preparation of ferric oxide particles coated with silicon dioxide grafted with hyperbranched polysiloxane, specifically:

[0040] S11: Take magnetic Fe3O4 nanoparticles, ultrasonically disperse them in n-propanol solvent, add ammonia water dropwise under stirring conditions to make the pH 8.0-11.0, then add ethyl orthosilicate, and react at 25-60°C 2-6h, magnetic separation to obtain ferric oxide particles coated with silicon dioxide; wherein, the mas...

Embodiment 2

[0046] This embodiment discloses a magnetic plastic, which includes the following components in parts by weight: 80 parts of polyphenylene ether, 5 parts of polyalkyl silicone resin, 5 parts of pentaerythritol stearate, phthalates 10 parts of plasticizer, 2 parts of calcium stearate and 4 parts of magnetic particles, the magnetic particles are ferric oxide particles coated with silicon dioxide grafted by hyperbranched polysiloxane.

[0047] The preparation method of the magnetic plastic comprises the following steps:

[0048] S1: Preparation of ferric oxide particles coated with silicon dioxide grafted with hyperbranched polysiloxane, specifically:

[0049] S11: Take magnetic Fe3O4 nanoparticles, ultrasonically disperse them in n-propanol solvent, add ammonia water dropwise under stirring conditions to make the pH 8.0-11.0, then add ethyl orthosilicate, and react at 25-60°C 2-6h, magnetic separation to obtain ferric oxide particles coated with silicon dioxide; wherein, the ma...

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PUM

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Abstract

The invention relates to magnetic plastic and a preparation method thereof. The magnetic plastic disclosed by the invention comprises the following components in parts by weight: 60-80 parts of polyphenylene ether, 5-15 parts of silicone resin, 3-5 parts of a lubricant, 8-10 parts of a plasticizer, 1-2 parts of a stabilizer and 3-5 parts of magnetic particles, wherein the magnetic particles are ferroferric oxide particles grafted with hyper-branched polysiloxane and coated with silica. The magnetic particles used in the magnetic plastic in the invention are silica-coated ferrosoferric oxide particles, and the hyper-branched polysiloxane is grafted onto the surface of silica. The particles can effectively be cross-linked after being mixed with organosiloxane, and the combining compatibility of the magnetic particles with a plastic body is improved to ensure uniformity and stability of the magnetic particles in the plastic.

Description

technical field [0001] The invention relates to the field of plastics, in particular to a magnetic plastic and a preparation method thereof. Background technique [0002] Magnetic plastic mainly refers to plastic products with magnetism, which have the characteristics of low density and high impact resistance. Its products can be processed by cutting, cutting, drilling, welding, lamination and embossing, and are widely used in electronics, Electrical, instrumentation, communication, culture and education, medical and health and many fields in daily life. At the same time, it can be processed into products with high dimensional accuracy, thin walls and complex shapes, and products with inserts can be formed to realize the miniaturization, light weight, precision and high performance of electromagnetic equipment. Therefore, in some new fields, sintered magnets are gradually being replaced by magnetic plastics. At the same time, magnetic plastics consume less energy than sint...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L71/12C08L83/04C08K13/06C08K9/10C08K9/06C08K3/22C08K3/36C08K5/103C08K5/12C08K5/098
CPCC08L71/12C08K2003/2275C08K2201/011C08L2205/03C08L2312/00C08L83/04C08K13/06C08K9/10C08K9/06C08K9/08C08K3/22C08K3/36C08K5/103C08K5/12C08K5/098
Inventor 陈林照
Owner TAISHAN CHANGJIANG PLASTIC PROD
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