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Nylon-based injection molding magnetic composite material and preparation method thereof

A magnetic composite material, nylon-based technology, applied in the magnetic direction of organic materials/organic magnetic materials, can solve the problems of low maximum magnetic energy product, low filling amount of magnetic inorganic fillers, etc., to ensure mechanical strength, increase filling amount, and magnetic energy positive effect

Active Publication Date: 2020-11-27
GUANGZHOU CHENDONG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above situation, the present invention provides a nylon-based injection-molded magnetic composite material and its preparation method to solve the problem of the decline in the mechanical strength of polymer-based magnetic composite materials currently on the market The influence of the magnetic inorganic filler is not high, which leads to the problem of low maximum magnetic energy product

Method used

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  • Nylon-based injection molding magnetic composite material and preparation method thereof
  • Nylon-based injection molding magnetic composite material and preparation method thereof
  • Nylon-based injection molding magnetic composite material and preparation method thereof

Examples

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preparation Embodiment 1

[0056] Preparation Example 1 (Preparation of dendritic silane-polyamide-amine coupling agent)

[0057] (1) Under the protection of nitrogen, combine 5.16kg of monomer A ethylenediamine tetracapronic acid and 8.16kg of monomer B3-(2-aminoethyl-(2-carboxyethyl)amino)propionic acid (monomer The molar ratio of A to monomer B is 1:4) Put it into an automatically controlled polymerization kettle with a stirrer, heat up to 90°C, and react for 3 hours until the reaction liquid becomes a clear and uniform liquid without bubbles, and the intermediate product E is obtained. ;

[0058] (2) Add 2.4 kg of monomer C ethylene diamine (molar ratio of monomer A to monomer A in step (1) 4:1) into the automatically controlled polymerizer with a stirrer containing the intermediate product E of step (1). ) And 8.84kg of monomer Dγ-aminopropyltriethoxysilane (the molar ratio of monomer A in step (1) is 4:1). When the temperature in the polymerization vessel is heated to 120°C, start stirring and continu...

Embodiment 1-8

[0060] The nylon-based injection molded magnetic composite material of the present invention was prepared according to the following method according to the charging ratio of each raw material in Table 1:

[0061] Step A: crush the nylon base material to 100 meshes to obtain nylon fine powder;

[0062] Step B: Hydrolyze the measured dendritic silane-polyamide-amine polymer with 30% distilled water relative to its mass for 2 hours in advance to obtain the coupling agent hydrolysate, and then add the magnetic filler to the temperature-controlled high-speed batching In the mixer, add the above coupling agent hydrolysate, mix at high speed for 10 minutes, after mixing uniformly, adjust the mixer speed to 5r / min, raise the temperature to 100°C, pre-react for 2 hours, and stop the temperature control.

[0063] Step C: Continue to put nylon micropowder and other additives into the high-speed batching mixer described in Step B, and mix at high speed for 10 minutes to obtain a premixed mixtur...

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Abstract

The invention belongs to the field of high polymer materials, and particularly relates to a nylon-based injection molding magnetic composite material and a preparation method thereof. The nylon-basedinjection molding magnetic composite material is prepared from the following raw materials in percentage by mass: 5%-30% of a nylon base material, 70%-95% of a magnetic filler, 1%-4% of a coupling agent and 1%-4% of an auxiliary agent. The invention discloses the nylon-based injection molding magnetic composite material. The nylon base material can be in more sufficient contact with the interfaceof the magnetic filler; the compatibility is improved, so that the filling amount is increased, the maximum magnetic energy product is increased, meanwhile, the cohesive energy of the nylon-based injection molding magnetic composite material is greatly improved due to the improvement of the interface adhesion, and the mechanical strength of the nylon-based injection molding magnetic composite material is guaranteed while the high-magnetism filler is filled.

Description

Technical field [0001] The invention belongs to the field of polymer materials, and specifically relates to a nylon-based injection-molded magnetic composite material and a preparation method and a preparation method thereof. Background technique [0002] Magnetic plastic is a new type of polymer functional material. According to its structure, it is divided into structural type and composite type. Structural magnetic plastic is a magnet with strong magnetism in the polymer itself. Composite magnetic material is made of plastic, rubber, nylon, etc. It is a magnet processed by mixing and bonding adhesives and magnetic materials. It has the characteristics of both plastics and magnetic materials. Although its magnetic properties are not as strong as traditional sintered magnets or cast permanent magnets, its mechanical processing performance is good. It can make full use of the advantages of plastics' easy molding and high production efficiency, and can form products with complex s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/20C04B20/02C08G73/02B29C48/00H01F1/42C04B14/36C04B14/34
CPCC04B26/20C04B20/023C08G73/028B29C48/022H01F1/42C04B2111/00422C04B14/363C04B14/34C04B2103/608C04B2103/0068
Inventor 陈文冠李东阵杨冬
Owner GUANGZHOU CHENDONG NEW MATERIALS
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