Single-component flame-retardant silica gel impregnated material for piezoresistor, method and application

A technology of varistor and flame retardant silica gel, applied in the field of materials, can solve the problems of undiscovered patent publications, etc., and achieve the effects of easy dip coating and packaging, good fluidity, and high flame retardant performance

Active Publication Date: 2022-04-29
天津凯华绝缘材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Through the search, no patent publications related to the patent application of the present invention have been found

Method used

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  • Single-component flame-retardant silica gel impregnated material for piezoresistor, method and application
  • Single-component flame-retardant silica gel impregnated material for piezoresistor, method and application
  • Single-component flame-retardant silica gel impregnated material for piezoresistor, method and application

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preparation example Construction

[0048] The preparation method of the one-component flame-retardant silica gel impregnating material for the above-mentioned varistor, the steps are as follows:

[0049] Weigh vinyl silicone oil, reinforcing resin, half of the mass of tackifier, flame retardant, ceramization aid, catalyst, inhibitor, nano-calcium carbonate or ultrafine silica powder in thixotropic agent, and add to Disperse in a high-speed disperser for 60-90 minutes; after the dispersion is uniform, add the remaining half of the mass of tackifier and hydrophobically modified silica in the thixotropic agent, and stir rapidly for 30 minutes; finally add a cross-linking agent to disperse for 15 minutes, and vacuumize for 30 minutes to defoam ~1h, one-component flame-retardant silica gel impregnating material for varistors can be obtained.

[0050] The one-component flame-retardant silica gel impregnating material for varistors mentioned above is used in the encapsulation of varistors, or in the dip-coating encaps...

Embodiment 1

[0055] A single-component flame-retardant silica gel impregnating material for varistors, the composition and mass parts of which are as follows:

[0056] 40 parts of 2000mPa s vinyl silicone oil, 30 parts of 300mPa s vinyl silicone oil, 15 parts of MQ reinforcing resin, 2 parts of tackifier, 15 parts of aluminum hydroxide, 5 parts of zinc carbonate, 20 parts of mica powder, 5 parts of glass powder 5 parts of iron oxide, 5 parts of nano-calcium carbonate, 3 parts of hydrophobic fumed silica, 0.2 parts of catalyst, 0.2 parts of inhibitor, 15 parts of hydrogen-containing silicone oil at the end of 100mPa s, and 4 parts of hydrogen-containing silicone oil at the side.

[0057] Its preparation method is as follows:

[0058] Weigh vinyl silicone oil, reinforcing resin, 1 / 2 tackifier, flame retardant, ceramic additive, nano-calcium carbonate, catalyst, inhibitor by mass parts, add to high-speed disperser and disperse for 60~90min; disperse evenly Finally, add the remaining 1 / 2 of t...

Embodiment 2

[0061] A single-component flame-retardant silica gel impregnating material for varistors, the composition and mass parts of which are as follows:

[0062] 10 parts of 10000mPa s vinyl silicone oil, 40 parts of 1000mPa s vinyl silicone oil, 40 parts of 100mPa s vinyl silicone oil, 10 parts of MQ reinforcing resin, 0.5 parts of tackifier, 10 parts of modified magnesium hydroxide, modified 20 parts of permanent aluminum hydroxide, 30 parts of mica powder, 10 parts of zinc oxide, 5 parts of superfine silicon powder, 4 parts of hydrophobic fumed silica, 0.3 parts of catalyst, 0.3 parts of inhibitor, and 3 parts of hydrogen-containing silicone oil.

[0063] Its preparation method is as follows:

[0064] Weigh vinyl silicone oil, reinforcing resin, 1 / 2 tackifier, flame retardant, ceramization aid, ultrafine silicon micropowder, catalyst, inhibitor in parts by mass, and add it to a high-speed disperser for 60-90 minutes; disperse After uniformity, add the remaining 1 / 2 tackifier, hyd...

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Abstract

The invention belongs to the technical field of materials, and discloses a one-component flame-retardant silica gel impregnating material for a piezoresistor, a method and application, and the one-component flame-retardant silica gel impregnating material for the piezoresistor comprises the following components in parts by mass: 65-85 parts of vinyl silicone oil, 5-25 parts of reinforcing resin, 15-30 parts of a flame retardant, 30-50 parts of a ceramization auxiliary agent, 3-10 parts of a thixotropic agent, 0.5-4 parts of a tackifier and 0.1-1 part of a catalyst. 0.1-1 part of an inhibitor and 3-20 parts of a cross-linking agent. The silica gel impregnated material has lower viscosity and higher thixotropic value, is convenient to encapsulate and instantly shape, does not contain an organic solvent, is safer and more environment-friendly, does not contain halogen and phosphorus elements, is simple in preparation process and good in flame retardant property, and meets the requirement of over-pressure flame retardance without open fire or the open fire time is less than 1s.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a single-component flame-retardant silica gel impregnating material for piezoresistors, a method and an application. Background technique [0002] Silicone rubber has excellent properties such as high and low temperature resistance, weather resistance, electrical insulation, chemical corrosion resistance and physiological inertness, especially the addition-type liquid silicone rubber does not produce by-products during the vulcanization process, has low shrinkage, and the preparation process is simple. Widely used in electronics and electrical industries. Liquid silicone potting materials are commonly used in varistor insulation materials in the market, while liquid silicone rubber impregnating materials are rare. Silicone impregnating materials have higher requirements on the viscosity and thixotropy of liquid silicone, otherwise it is easy to have problems such as drippers, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/04C08L83/05C08K3/22C08K3/34C08K3/40C08K9/06B05D1/18B05D7/24H01B3/30H01B3/46H01C1/034H01C17/02
CPCC08L83/04B05D7/24B05D1/18H01B3/465H01B3/30H01C1/034H01C17/02B05D2518/10C08L2205/025C08L2201/02C08L2201/22C08L2203/206C08K2003/2227C08K2003/2224C08K2003/2296C08K3/22C08K3/34C08K3/40C08K9/06
Inventor 严从立陈韫廷任开阔
Owner 天津凯华绝缘材料股份有限公司
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