One-component flame-retardant silica gel impregnating material for varistor, 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 good fluidity

Active Publication Date: 2022-06-24
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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  • One-component flame-retardant silica gel impregnating material for varistor, method and application
  • One-component flame-retardant silica gel impregnating material for varistor, method and application
  • One-component flame-retardant silica gel impregnating material for varistor, method and application

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preparation example Construction

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

[0049] Weigh in parts by mass of vinyl silicone oil, reinforcing resin, half mass of tackifier, flame retardant, ceramization aid, catalyst, inhibitor, nano-calcium carbonate or ultrafine silicon powder in thixotropic agent, and add to Disperse in a high-speed disperser for 60~90min; after uniform dispersion, add the remaining half mass of the tackifier and hydrophobically modified silica in the thixotropic agent, stir rapidly for 30min; finally add the crosslinking agent to disperse for 15min, and vacuum for deaeration for 30min After ~1h, one-component flame-retardant silicone impregnating material for varistor can be obtained.

[0050] The above-mentioned one-component flame-retardant silicone impregnating material for varistor is in the aspect of encapsulation of varistor, or in the aspect of dip coating and encapsulat...

Embodiment 1

[0055] A single-component flame-retardant silica gel impregnating material for varistor, its composition and mass fraction are as follows:

[0056] 40 parts of 2000mPa s vinyl silicone oil, 30 parts of 300 mPa 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 parts, 5 parts of iron oxide, 5 parts of nano calcium carbonate, 3 parts of hydrophobic fumed silica, 0.2 part of catalyst, 0.2 part 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, ceramizing aid, nano calcium carbonate, catalyst, inhibitor by mass, add it to a high-speed disperser and disperse for 60~90min; disperse evenly Then add the remaining 1 / 2 of the tacki...

Embodiment 2

[0061] A single-component flame-retardant silica gel impregnating material for varistor, its composition and mass fraction 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 reinforced resin, 0.5 part of tackifier, 10 parts of modified magnesium hydroxide, modified 20 parts of aluminum hydroxide, 30 parts of mica powder, 10 parts of zinc oxide, 5 parts of ultrafine silicon powder, 4 parts of hydrophobic fumed silica, 0.3 parts of catalyst, 0.3 part of inhibitor, and 3 parts of hydrogen-containing silicone oil on the side.

[0063] Its preparation method is as follows:

[0064] Weigh vinyl silicone oil, reinforcing resin, 1 / 2 tackifier, flame retardant, ceramization aid, ultrafine silicon powder, catalyst, inhibitor by mass, add it to a high-speed disperser and disperse for 60~90min; After uniformity, add the remaining 1 / 2 of the tackifier and hydrophobic fumed si...

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Abstract

The invention belongs to the technical field of materials, and discloses a single-component flame-retardant silica gel impregnating material for varistors, a method and an application thereof. The composition and mass parts of the single-component flame-retardant silica gel impregnating material for piezoresistors are as follows : 65~85 parts of vinyl silicone oil, 5~25 parts of reinforcing resin, 15~30 parts of flame retardant, 30~50 parts of ceramic additive, 3~10 parts of thixotropic agent, 0.5~4 parts of tackifier, Catalyst 0.1~1 part, inhibitor 0.1~1 part, crosslinking agent 3~20 parts. The silica gel impregnating material of the present invention has lower viscosity and higher thixotropy value, which is convenient for encapsulation and instant setting. The coating does not contain organic solvents, is safer and more environmentally friendly, does not contain halogens and phosphorus elements, has simple preparation process, and has flame retardant properties. Good, meet the requirements of overvoltage flame retardant without open flame or open flame 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 a varistor, 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, the shrinkage rate is low, and the preparation process is simple. Widely used in electronics and electrical industries. The most commonly used varistor insulating materials in the market are liquid silicone potting compounds, while liquid silicone rubber impregnating materials are rare. Silicone impregnating material has higher requirements on the viscosity and thixotropy of liquid silicone, otherwise it is prone to product defects and fai...

Claims

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Application Information

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Patent Type & Authority Patents(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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