Organic silicon adhesive for fixing medium-size nanocrystalline magnetic core and preparation method

A silica gel adhesive and nanocrystalline technology, applied in the direction of adhesives, polymer adhesive additives, non-polymer adhesive additives, etc., can solve the problems of poor compatibility, decreased magnetic properties, unenvironmental protection, etc., and achieve fast curing speed. , The effect of less damage to magnetic properties and high production efficiency

Active Publication Date: 2020-10-30
杭州先创高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of silicone adhesive for fixing medium-sized nanocrystalline magnetic core, for solving existing In the technology, the single-component room temperature vulcanized silicone rubber used for fixing the medium-sized nanocrystalline magnetic core has poor compatibility with the magnetic core, which leads to a serious decline in magnetic performance and the problem of not being environmentally friendly; at the same time, the present invention will also provide a fixed medium-sized nanocrystalline magnetic core. The preparation method of the silicone adhesive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Add 100 parts of hydroxyl-terminated polydimethylsiloxane (25°C, 20000mPa·s), 15 parts of dimethyl silicone oil (350mPa·s), and 40 parts of barium stearate into the high-speed disperser, Stir at -0.098Mpa at a temperature of 70-80°C for 4 hours, then cool down to below 45°C, add 10 parts of cross-linking and viscosity-increasing catalytic composite additives, and stir in vacuum for 45 minutes at a vacuum of -0.098Mpa; finally add 0.5 parts of cyanide ethyl Trimethoxysilane, stirred in vacuum for 20min at a vacuum degree of -0.098Mpa, sealed and stored to obtain an adhesive sample.

[0036] Preparation of cross-linking viscosity-increasing catalytic composite additives: Add tetraethoxysilane, diethylaminomethyltriethoxysilane, and aminopropyltrimethoxysilane to four In the flask, the temperature was raised to 70°C under the protection of nitrogen gas, and then the temperature was kept at reflux for 6 hours, and then it was lowered to room temperature and sealed for stora...

Embodiment 2

[0038] Add 100 parts of hydroxyl-terminated polydimethylsiloxane (25°C, 20000mPa·s), 15 parts of simethicone oil (350mPa·s), 40 parts of barium stearate into the high-speed disperser, vacuum at -0.098MPa Stir at 70-80°C for 4 hours, then cool down to below 45°C, add 10 parts of cross-linking viscosity-increasing catalytic composite additive, and stir in vacuum for 45 minutes at a vacuum degree of -0.098Mpa; finally add 0.5 parts of cyanoethyltrimethoxy Silane, stirred in vacuum for 20min at a vacuum degree of -0.098Mpa, sealed and preserved to obtain an adhesive sample.

[0039] Preparation of cross-linking viscosity-increasing catalytic compound additives: Tetramethoxysilane, diethylaminomethyltriethoxysilane, 2-(aminoethyl)-3-aminopropyltrimethoxysilane by 1 The ratio of :0.8:0.2 was added to a four-necked flask, and the temperature was raised to 80°C under nitrogen protection, and then the temperature was kept at reflux for 6 hours, and then it was lowered to room temperatu...

Embodiment 3

[0041]Add 100 parts of hydroxyl-terminated polydimethylsiloxane (25°C, 20000mPa·s), 15 parts of simethicone oil (350mPa·s), 40 parts of barium stearate into the high-speed disperser, vacuum at -0.098MPa Stir at 70-80°C for 4 hours, then cool down to below 45°C, add 10 parts of cross-linking, viscosifying and catalytic composite additives, and stir in vacuum for 45 minutes at a vacuum degree of -0.098Mpa; finally add 0.5 parts of CH 3 {O[(CH 3 ) 2 SiO] 4 (CH 3 ) 2 SiCH 2 CH 2 C(O)(OC 2 h 4 ) 16.2 (OC 3 h 6 ) 12.3 OC 4 h 9} 3 The polyether silane was stirred in vacuum for 20min at a vacuum degree of -0.098Mpa, and the adhesive sample was sealed and stored.

[0042] Preparation of cross-linking viscosity-increasing catalytic compound additives: Tetramethoxysilane, diethylaminomethyltriethoxysilane, 2-(aminoethyl)-3-aminopropyltrimethoxysilane by 1 The ratio of :0.8:0.2 was added to a four-necked flask, and the temperature was raised to 80°C under nitrogen protecti...

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Abstract

The invention relates to an organic silicon adhesive for fixing a medium-size nanocrystalline magnetic core and a preparation method. The organic silicon adhesive comprises the following components: hydroxyl-terminated polydimethylsiloxane, a plasticizer, a reinforcing filler, a crosslinking tackifying catalytic compound additive and a thixotropic agent, wherein the cross-linking tackifying catalytic compound additive is prepared from alkoxy silane, alpha silane and amino silane through reflux reaction. The preparation method of the organic silicon adhesive comprises the following steps: adding hydroxyl-terminated polydimethylsiloxane, the plasticizer and the reinforcing filler into a high-speed dispersion machine, carrying out vacuum high-temperature stirring dehydration to obtain a baseadhesive material, cooling, adding the crosslinking tackifying catalytic composite assistant and the thixotropic agent, and carrying out vacuum stirring to obtain the organic silicon adhesive. The problems that in the prior art, single-component room-temperature vulcanized silicone rubber and a magnetic core are poor in compatibility, consequently, magnetic performance is severely reduced, and environmental friendliness is not achieved are solved, and the organic silicon adhesive has the advantages of being uniform and fine in appearance, good in thixotropy, low in magnetic performance attenuation, high in bonding strength and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of silicone adhesives for magnetic cores, in particular to a silicone adhesive for fixing medium-sized nanocrystalline magnetic cores and a preparation method thereof. Background technique [0002] The microstructure of nanocrystalline soft magnetic alloy materials is disordered, very brittle and easily broken. The production process for preparing the magnetic core is as follows: the strip is wound into a magnetic core, solidified and shaped, glue dispensed, loaded into a protective shell, and enameled wire wound. [0003] Curing and shaping is to bond each circle of the magnetic core into a whole to prevent brittle cracks and damage performance during vibration; dispensing is to fix the magnetic core and the protective shell to prevent the magnetic core from shaking in the protective shell. Once shaken, it will become scrap. The size of the nanocrystalline magnetic core will vary according to the actual a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J11/06C09J11/08C08G77/26
CPCC09J183/04C09J11/06C09J11/08C08G77/26C08L2205/025C08L2205/02C08L2205/03C08L2205/035C08K2003/265C08L83/04C08L83/08C08K5/098C08K5/5475C08L83/12C08K3/26
Inventor 徐晓明
Owner 杭州先创高新材料有限公司
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