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Preparation method of heat-resistant magnetic thermoplastic plastic particles

A thermoplastic and magnetic technology is applied in the field of preparation of heat-resistant magnetic thermoplastic particles, which can solve the problems of poor magnetic effect and uneven distribution of magnetic powder, and achieve the effects of low density, high cost and simple preparation method.

Inactive Publication Date: 2020-07-10
合肥凯大新型材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN102516625A discloses a magnetic plastic produced from waste plastics. The waste plastic is polyethylene, the plastic additives are coupling agents and plasticizers, and the magnetic powder is ferrite magnetic powder or rare earth permanent magnetic powder. The preparation method is similar to that of common magnetic plastics. The preparation method is similar, it is simple to mix magnetic powder with plastic, the distribution of magnetic powder is uneven, agglomeration occurs, and the magnetic effect is not good.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020]In the first step, in parts by weight, add 29 parts of acetic anhydride to a reaction kettle equipped with a stirrer, a thermometer, and a dropping funnel, cool to -10°C, and slowly add 95% of the mass fraction of 7 parts of concentrated sulfuric acid, the temperature is controlled at -2 ° C, after the dropwise addition, a colorless and transparent solution is obtained, which is used as a catalyst; 53 parts of polyvinyl carbazole copolymers are dried at 40 ° C in a vacuum oven for 8 hours, and then dried at room temperature Dissolve in 65 parts of tetrahydrofuran, transfer to a reaction kettle equipped with a stirrer, thermometer, and dropping funnel, add 22 parts of the above catalyst, then reflux and stir at 6°C for 40 minutes, then add 15 parts of tetrahydrofuran dropwise, and cool to 2°C, react at this temperature for 2 hours, then raise the temperature to 6°C and react for 2 hours, add 10% NaOH aqueous solution dropwise to control the pH value of the system to 7.4, r...

Embodiment 2

[0022] In the first step, in parts by weight, add 36 parts of acetic anhydride into a reaction kettle equipped with a stirrer, a thermometer and a dropping funnel, cool to 2°C, and slowly add 95% concentrated 7 parts of sulfuric acid, the temperature is controlled at 2°C. After the dropwise addition, a colorless and transparent solution is obtained, which is used as a catalyst; 53 parts of polyvinylcarbazole copolymer are dried at 40°C for 10 hours in a vacuum oven, and then dissolved in Transfer 73 parts of tetrahydrofuran to a reaction kettle equipped with a stirrer, a thermometer, and a dropping funnel, add 26 parts of the above-mentioned catalyst, reflux and stir at 6°C for 40 minutes, then add 23 parts of tetrahydrofuran dropwise, and cool to 2°C , reacted at this temperature for 2 hours, and then raised the temperature to 6°C for 2 hours, then added dropwise 10% NaOH aqueous solution by mass to control the pH value of the system to 7.4, replaced the distillation device, e...

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Abstract

The invention belongs to the field of high polymer materials, and particularly relates to a preparation method of heat-resistant magnetic thermoplastic plastic particles. The prepared heat-resistant magnetic thermoplastic plastic particles have good heat resistance, the preparation method is simple, the raw material sources are wide, by means of one-step method, and through sulfonating treatment,meanwhile, polyether polyol, ferrocene and vinylcarbazole are introduced in one step simultaneously to serve as the substrates, oxidative conversion of an initiator and initiation of free radical polymerization are carried out respectively to prepare magnetic polyvinyl carbazole synchronously, further high-hardness polyurethane is prepared from the obtained products and diisocyanate, and blendingmodification is carried out on a polyvinyl carbazole matrix to obtain the magnetic plastic particles with the advantages of small density, good heat resistance, high impact strength and thermoplasticity. The product can be subjected to cutting, machining, thermoplastic extrusion, welding, laminating and other processing, cannot be fragmented in the use process, and has favorable comprehensive properties like corrosion resistance and electrical properties.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to a preparation method of heat-resistant magnetic thermoplastic particles. Background technique [0002] Magnetic plastics can be divided into structural type and composite type according to their composition. Structural magnetic plastics refer to magnets with strong magnetism in the polymer itself. This type of magnetic plastics is still in the exploration stage, and there is still a certain distance from practicality; Magnetic plastic refers to a magnet made of plastic or rubber as a binder and magnetic powder. This type of magnetic plastic has been commercialized. At present, the magnetic powder used for filling is mainly ferrite magnetic powder and rare earth permanent magnet. Magnetic powder plays a key role in realizing miniaturization, light weight, precision and high performance of electromagnetic equipment. The development of magnetic plastics in my country is r...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08L39/04C08K3/22C08G18/66C08G18/48C08G18/32
CPCC08G18/4854C08G18/6674C08K2003/2275C08K2201/01C08L75/08C08L2201/08C08L39/04C08K3/22
Inventor 张海涛
Owner 合肥凯大新型材料科技有限公司
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