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A kind of insulating silicone rubber formula applied on varistor and preparation method thereof

A technology of varistor and insulating silicon, which is applied in the field of insulating silicone rubber formula and its preparation, can solve the problems of poor resistance to high and low temperature impact, achieve the effects of solving adhesion, simplifying the manufacturing process, and reducing production costs

Active Publication Date: 2022-05-31
CHENGDU TIEDA ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of poor high and low temperature impact resistance existing in the above-mentioned existing insulating layer materials, and easy expansion, cracking, and falling off when impacted by high-energy-density lightning wave surge current at high temperatures and affecting insulation performance, the present invention provides an application in voltage The insulating silicone rubber formula on the sensitive resistor and its preparation method can have good impact resistance after modification of the material through its high elasticity characteristics, and at the same time have good tensile strength, and are not easy to break and fall off

Method used

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  • A kind of insulating silicone rubber formula applied on varistor and preparation method thereof

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Effect test

Embodiment 1

[0041] In this embodiment, a formula of insulating silicone rubber is specifically disclosed, which is an insulating material specially used for varistors.

[0049] Silicone rubber raw rubber ...... 30%

[0050] Auxiliary... 40%

[0051] Reinforcing resin material ...... 15%

[0052] Thixotropic agent...10%

[0053] Curing agent 5%

Embodiment 2

[0061] Hexamethyldisilazane ...... 5%

[0062] Ethyl orthosilicate...3%

[0063] Polyethyl silicate ...... 2%

[0064] Phenyl silica gel... 25%

[0065] Hydroxy silicone oil...30%

[0066] Nitrogen-based flame retardant ...... 10%

[0067] Phosphorus flame retardant ...... 10%

[0068] Thixotropic agent...10%

[0069] Curing agent 5%

[0071] Because the formula in this embodiment has better bonding strength compared with the existing flexible encapsulation material by adjusting

Embodiment 3

[0075] Hexamethyldisilazane ...... 5%

[0076] Ethyl orthosilicate... 3%

[0077] Polyethyl silicate ...... 2%

[0078] Phenyl silica gel... 25%

[0079] Hydroxy silicone oil...30%

[0080] Nitrogen-based flame retardant ...... 10%

[0081] Phosphorus flame retardant ...... 10%

[0082] Thixotropic agent...10%

[0083] Curing agent 3%

[0084] Photosensitive toner (titanium dioxide) ...... 2%

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Abstract

The invention discloses a formula of insulating silicone rubber applied to a piezoresistor and a preparation method thereof, which is used to form an encapsulation material layer outside the piezoresistor, including 20-30% raw silicone rubber by mass fraction , 40-60% additives, 10-17% reinforcing resin material, 10-15% thixotropic agent and 3-5% curing agent. A preparation method is also disclosed. Firstly, raw silicone rubber, additives and reinforcing resin materials are uniformly mixed and vulcanized in proportion to obtain a synthetic silicone material; Next curing forms the finished silicone rubber. The application of the present invention in the varistor improves the high and low temperature cycle performance of the product. Compared with the prior art, it can pass multiple high and low temperature cycle tests, can withstand a wider range of high and low temperature impacts, and has a longer service life life.

Description

A kind of insulating silicone rubber formulation applied on varistor and preparation method thereof technical field The invention belongs to insulating or dielectric material technical field, be specifically related to a kind of insulating silicon applied on varistor Rubber formulation and preparation method thereof. Background technique Varistor is a kind of resistive device with nonlinear volt-ampere characteristics, which is mainly used for absorbing line surges in circuits. Safety devices for protection purposes. It mainly consists of zinc oxide particles with a small amount of other metal oxides or A ceramic block composed of polymer spacers to form a diode effect, which occurs due to hot electrons and tunneling when encountering high voltages Reverse collapse, large current flows, and the main indicator is determined by the specified lightning surge current. And the ceramic block structure is usually covered by a layer of insulating material, so as to form a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08K13/04C08K7/26C08K3/34C08K5/57C08K3/22H01C7/10H01C1/02
CPCC08L83/04H01C7/10H01C1/02C08L2205/025C08L2205/03C08L2201/08C08K2003/2241C08K13/04C08K7/26C08K3/346C08K5/57C08K3/22
Inventor 张治成石小龙叶磊詹俊鹄章俊
Owner CHENGDU TIEDA ELECTRONICS CORP